An-Najah National University Faculty of Engineering & Information Technology Energy and Environment Department Graduation Project 2 “Design of a large PV grid connected-pumping system: A grid and environment impact studies “ Supervised by: Dr. Tamer Khatib Prepared by: Bahaa Majadleh Mohammed Atira Presented in partial fulfillment of the requirements for Bachelor degree in Energy Engineering. Spring 2018 1 | P a g e Table of Contents: Table of Contents: ......................................................................................................................................................... 1 List of Tables: ............................................................................................................................................................ 4 List of figures: ............................................................................................................................................................ 5 Abstract: ........................................................................................................................................................................ 6 Discussion ..................................................................................................................................................................... 7 Literature review .......................................................................................................................................................... 8 Methodology: ............................................................................................................................................................. 10 CHAPTER 1: INTRODUCTION TO SOLAR ENERGY .............................................................................................................. 11 Introduction ................................................................................................................................................................ 12 1.1 Electricity in Palestine (Challenges and difficulties) ......................................................................................... 12 1.2 Energy supply gaps are constraining economic growth ................................................................................... 12 1.3: solar energy: .................................................................................................................................................... 13 1.4: addressing constraints in growth of the sector: .............................................................................................. 14 1.5 Solar radiation in Palestine ............................................................................................................................... 14 CHAPTER 2: WATER PUMPING SYSTEM .......................................................................................................................... 16 Introduction ................................................................................................................................................................ 17 Site view ...................................................................................................................................................................... 18 Problem statement: .................................................................................................................................................... 21 Energy Bill: .................................................................................................................................................................. 22 CHAPTER 3: COMPONENTS OF SOLAR SYSTEM ................................................................................................................ 23 3.1 Solar module ..................................................................................................................................................... 24 3.2 inverters ............................................................................................................................................................ 25 3.3 monitoring ........................................................................................................................................................ 26 3.4 Protection: ........................................................................................................................................................ 26 3.4.1 Fuses: ............................................................................................................................................................. 26 3.4.2 circuit breakers .............................................................................................................................................. 26 3.4 cables ................................................................................................................................................................ 27 3.5 lighting protection system. ............................................................................................................................... 27 3.6 Earthing ............................................................................................................................................................. 28 3.7 RCD protection .................................................................................................................................................. 30 CHAPTER 4: TRUE SOUTH ORIENTED DESIGN ................................................................................................................... 31 Introduction: ............................................................................................................................................................... 32 4.1 Solar Modules ................................................................................................................................................... 32 4.2 Shading analysis ................................................................................................................................................ 33 4.3 Inverters ............................................................................................................................................................ 37 2 | P a g e 4.4 Mentoring system ............................................................................................................................................. 39 4.5 Cables ................................................................................................................................................................ 40 4.5 Protection ......................................................................................................................................................... 40 4.6 Bill of Quantity .................................................................................................................................................. 42 4.6.1 BOQ for land .................................................................................................................................................. 42 4.6.2 Well BOQ ........................................................................................................................................................ 43 4.6.3 combination of land and well BOQ ................................................................................................................ 44 4.7 Restscreen ......................................................................................................................................................... 44 CHAPTER 5: HORIZONTAL ORIENTED DESIGN .................................................................................................................. 53 Introduction: ............................................................................................................................................................... 54 5.1 Solar Modules ................................................................................................................................................... 54 5.3 Inverters ............................................................................................................................................................ 58 4.4 Mentoring system ............................................................................................................................................. 60 5.5 Cables ................................................................................................................................................................ 61 5.6 Protection ......................................................................................................................................................... 62 5.7 Bill of Quantity .................................................................................................................................................. 64 5.8 Restscreen ......................................................................................................................................................... 65 CHAPTER 6: OFF-GRID DESIGN ...................................................................................................................................... 70 Introduction: ............................................................................................................................................................... 71 6.1 Load estimation................................................................................................................................................. 72 6.2 Solar source: ..................................................................................................................................................... 73 6.3 system sizing ..................................................................................................................................................... 73 Battery .................................................................................................................................................................... 74 Solar Modules ......................................................................................................................................................... 74 Inverter ....................................................................................................................................................................... 77 6.4 Charge controller system ...................................................................................................................................... 78 6.5 Cables .................................................................................................................................................................... 79 1- DC cables............................................................................................................................................................. 79 2-AC cables .............................................................................................................................................................. 79 6.6 Protection ......................................................................................................................................................... 79 6.7 Bill of Quantity .................................................................................................................................................. 81 6.8 Restscreen ......................................................................................................................................................... 82 CHAPTER 7: ENVIRONMENTAL IMPACT ASSESSMENT ....................................................................................................... 86 7.1 EXECUTIVE SUMMARY .......................................................................................................................................... 87 7.1.1 Introduction .................................................................................................................................................... 87 7.1.2 Study area ...................................................................................................................................................... 87 3 | P a g e 7.1.3 Objectives of the Study .................................................................................................................................. 87 7.1.4 ESIA Methodology.......................................................................................................................................... 88 7.1.5 Administrative and Legal Framework ............................................................................................................ 88 7.1.6 Benefits of the Proposed Project ................................................................................................................... 89 7.1.7 Envisaged Sustainability ................................................................................................................................. 89 7.1.7.2 Technical Sustainability ........................................................................................................................... 89 7.1.7.3 Environmental Sustainability .................................................................................................................. 90 7.1.8 ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES .................................................... 90 7.1.8.1 Impacts during construction phase : ...................................................................................................... 90 7.1.8.2Impacts during operation phase : ............................................................................................................ 90 7.1.8.3 Impacts during decommissioning phase................................................................................................. 90 7.1.9 ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN ....................................................................... 91 7.2 Existing environment descriptions: ...................................................................................................................... 91 7.2.1 Meteorological condition .............................................................................................................................. 91 7.2.3 Noise .............................................................................................................................................................. 91 7.2.4 Soil quality ...................................................................................................................................................... 91 7.2.5 Present cropping practice and wild life ......................................................................................................... 91 7.2.6 Economic baseline data ................................................................................................................................. 92 7.3 ANALYSIS OF PROJECT ALTERNATIVES .................................................................................................................. 92 7.3.1 Site Alternatives ............................................................................................................................................. 92 7.4 Public Participation ............................................................................................................................................... 92 7.4.1 General........................................................................................................................................................... 92 7.4.2 Objectives ...................................................................................................................................................... 92 7.4.3 Taking actions ................................................................................................................................................ 92 7.5 screening ............................................................................................................................................................... 93 7.5.1 Terms of references ....................................................................................................................................... 93 7.6 Scoping .................................................................................................................................................................. 94 7.6.1 Environmental issues of the project: - ........................................................................................................... 94 7.6.1.1 Noise: ...................................................................................................................................................... 94 7.6.1.2 Land Use .................................................................................................................................................. 95 7.6.1.3Air Quality ................................................................................................................................................ 95 7.6.1.4 Biodiversity (Flora and Fauna ) ............................................................................................................... 95 7.6.1.5 Soil ........................................................................................................................................................... 96 7.6.1.6 Water resources...................................................................................................................................... 96 7.6.1.7 Waste Generation ................................................................................................................................... 96 7.6.2 Economic Components .................................................................................................................................. 97 4 | P a g e 7.6.2.1 Direct employment and income: ............................................................................................................ 97 7.6.2.2 Transportation requirements: ................................................................................................................ 97 7.6.3 Health component ......................................................................................................................................... 97 7.6.3.1 Health and safety .................................................................................................................................... 97 7.6.3.2 Employment opportunities ..................................................................................................................... 98 7.7 Leopold matrix ...................................................................................................................................................... 98 7.8 Mitigation measures ............................................................................................................................................. 98 7.8.1 Noise .............................................................................................................................................................. 98 7.8.2 Land use ......................................................................................................................................................... 99 7.8.3 Air quality ....................................................................................................................................................... 99 7.8.4 Biodiversity (Flora and Fauna) ..................................................................................................................... 100 7.8.5 Soil ................................................................................................................................................................ 100 7.8.6 Water resources........................................................................................................................................... 100 7.8.7 Water generation ......................................................................................................................................... 101 7.9 Environmental Monitoring Plan .......................................................................................................................... 101 7.9.1 General......................................................................................................................................................... 101 7.9.2 Objectives .................................................................................................................................................... 101 7.10 Conclusion ......................................................................................................................................................... 103 Results: ...................................................................................................................................................................... 104 Conclusion: ................................................................................................................................................................ 105 References: ............................................................................................................................................................... 106 APPENDIX .................................................................................................................................................................... 107 List of Tables: Table 1: mean monthly and annual daily global radiation ......................................................................................... 14 Table 2The daily average global solar radiation (kWh/m2.day) ................................................................................. 15 Table 3:: Monthly Averaged Diffuse Radiation Incident on A Horizontal Surface (kWh/m2/day) ............................. 18 Table 4:: Monthly Averaged Direct Normal Radiation (kWh/m2/day) ....................................................................... 18 Table 5:Monthly Averaged Solar Noon (GMT time) ................................................................................................... 19 Table 6:Monthly Averaged Daylight Hours (hours) .................................................................................................... 19 Table 7:Monthly Averaged Wind Speed At 50 m Above The Surface Of The Earth (m/s) ......................................... 19 Table 8: Minimum and Maximum Difference From Monthly Averaged Wind Speed At 50 m (%) ............................ 19 Table 9: Energy bill of the farm ................................................................................................................................... 22 Table 10: PV Module specification ............................................................................................................................. 32 Table 11: PV modules in south oriented ..................................................................................................................... 32 Table 12: ABB inverters specifications ........................................................................................................................ 37 Table 13: total number of inverters for the south oriented ......................................................................................... 38 Table 14:eGauge mentoring system specifications .................................................................................................... 39 5 | P a g e Table 15: DC protection of south oriented design...................................................................................................... 41 Table 16: AC protection of South oriented design ..................................................................................................... 41 Table 17: AC protection of south oriented design ...................................................................................................... 42 Table 18: BOQ of land in south oriented design ......................................................................................................... 43 Table 19: BOQ of well in south oriented design ......................................................................................................... 43 Table 20:BOQ of the combination of the well and land for the south oriented design ............................................. 44 Table 21: PV modules in south oriented ..................................................................................................................... 55 Table 22: total number of inverters for the south oriented ....................................................................................... 59 Table 23: eGuage monitoring system specifications .................................................................................................. 60 Table 24:cross section area of AC cables and their location ...................................................................................... 61 Table 25:DC protection of south oriented design ...................................................................................................... 62 Table 26: AC protection of South oriented design ..................................................................................................... 63 Table 27: AC protection of south oriented design ...................................................................................................... 63 Table 28:Boq of horizontal design .............................................................................................................................. 64 Table 29: avg daily and hourly energy consumption .................................................................................................. 72 Table 30: avg daily peak sun hours ............................................................................................................................. 73 Table 31: Battery specifications .................................................................................................................................. 74 Table 32: PV Module specification ............................................................................................................................. 75 Table 33: avg daily energy storage ............................................................................................................................. 76 Table 34: Zigor, hybrid inverter specification ............................................................................................................. 77 Table 35: DC protection for off grid system ............................................................................................................... 80 Table 36: AC protection for off grid ............................................................................................................................ 80 Table 37: BOQ for the off-grid design ......................................................................................................................... 81 Table 38: sound levels ................................................................................................................................................. 94 Table 40:Monitoring plan ......................................................................................................................................... 102 List of figures: Figure 1: electricity imports and production .............................................................................................................. 13 Figure 2:the pumping system ..................................................................................................................................... 17 Figure 3: The plan of the farm .................................................................................................................................... 18 Figure 4: the selected land to install PV ..................................................................................................................... 20 Figure 5: the plan of the well ...................................................................................................................................... 20 Figure 6: Energy Consumption of the farm ................................................................................................................ 22 Figure 7 from cell to array .......................................................................................................................................... 24 Figure 8: DC and AC current waveform ...................................................................................................................... 25 Figure 9:Common DC and AC Grounding Electrode ................................................................................................... 29 Figure 10: Combined DC Grounding-Electrode Conductor and AC Equipment Grounding Conductor ...................... 30 Figure 11:The plan of the farm ................................................................................................................................... 33 Figure 12: shading analysis ......................................................................................................................................... 34 Figure 13: PV modules distributed in the land ........................................................................................................... 35 Figure 14: PV modules distributed on the roof of the well ........................................................................................ 36 Figure 15:The plan of the farm ................................................................................................................................... 55 Figure 16:PV modules horizontal distributed in the land ........................................................................................... 56 Figure 17:PV modules distributed on the roof of the well ......................................................................................... 57 Figure 18: Avg daily and hourly energy consumption ................................................................................................ 72 Figure 19: ESIA methodology ...................................................................................................................................... 88 6 | P a g e Abstract: In this project we will design a PV system to install in a 0.25- acre farm near the city of Nablus, so we have three possible systems to do so: 1- On grid system. 2- Off grid system. 3- Off and on grid system. The aim of the first graduation project is to analysis the first option ( on grid system ) , and to study it from an economical point of view to determine its feasibility . The software packages PVSYS and RETSCREEN will be used for determining the components of the PV systems and the output power of each estimation. The system design will include the power of the PV generator, the ratings of the inverter and its number, the wiring of the system and the protection features. We will discuss in details, the amount of PV’s required and how to orient them to give us the maximum power, number of inverters needed, number and sizing of cables, find the cost of the first analysis and how feasible it is on the land. Then we will design a 199.24kW for true-south and 266.9kw and 69.36 KW south oriented off grid system for the horizontal PV system to cover the load that the farm needs to operate during peak months. Moreover, a techno economical study will be done for this system including environmental impact assessment. 7 | P a g e Discussion The farm has an area of 110 acres implanted with different kinds of crops that is locally used, the farm has a high consumption of water that is pumped over the whole area of the farm which makes the electricity bill very high for the farmers. Furthermore, the electricity is supplied from Tubas distribution company and it faces many blackouts during the peak times on the grid. The Farm’s owner faces many losses of the crops due to these blackouts and so he wants a reliability of providing electricity and also as well, he wants saving in his electricity bill by doing a PV system in a small area of the farm that can’t be used for agriculture which equals 2.5 acres (2500𝑚2), divided into two parts; the land (2000𝑚2) and building roof on the top of the well area which is (500𝑚2). We have studied the possibilities of the methods that would fit in with the constrains that we have such in order to install our system on the ground, so we came out with these three solutions. 1- On-grid, True south oriented installed PV’s. On both (land and well). 2- On-grid, Horizontal oriented installed PV’s. On both (land and well). 3- Off-grid, True south oriented installed PV’s. only on the well. Furthermore, we will discuss each solution in details in the coming chapters and each solution will be provided with a Retscreen report for the financial issue and how feasible the solution is and also an environmental impact has been done to see the impact of installing the PV system on the around environment. 8 | P a g e Literature review A large number of national and international studies have been conducted to study the opportunities of reducing electricity consumption and improving energy efficiency. These studies show that, it is quite possible to limit the increase in energy use without having negative effects. This chapter provides a literature review about previous work. The survey includes the following aspects: • Design and sizing of on-grid PV systems. • Design and sizing of hybrid PV systems. Review of Related Work Many researches on the design and sizing approaches of grid-connected PV systems, and power quality of grid-connected PV systems have been investigated. Samimi et al. (1997), analyzed the optimal tilt angle and other aspects of PV modules in various climates. However, an economic optimization design tool for optimal PV size based on technology information, current tariffs and policy has not yet been developed. Haas et al. (1999), investigated the socioeconomic aspects about an Austrian 200 kWp-rooftop program (100 PV systems with an average capacity of 2.28 kWp) to promote small grid-connected PV systems in Austria. Gong, and Kulkarni (2005), suggested an optimization method for a grid-connected PV system based on maximizing the utilization of the array output energy and minimizing the electricity power sold to the grid. Li et al. (2009), dealt with the sizing optimization problem of stand-alone PVPS using hybrid energy storage technology. The three hybrid power systems, i.e., PV/Battery system, PV/fuel cell (PV/FC) system, and PV/FC/Battery system, are optimized, analyzed and compared. The proposed PV/FC/Battery hybrid system was found to be the configuration with lower cost, higher efficiency, and less PV modules as compared with single storage system. Al-Salaymeh et al. (2010), proposed a design of PV system to produce energy for basic domestic needs. The proposed design studied the feasibility of utilizing PV systems in a standard residential apartment in Amman city in Jordan to conduct energy and economic calculations. It was found that the calculated payback period high in a stand-alone system, to decrease payback period a grid-connected PV system was suggested. The output results of this study show that installation of PV system in a residential flat in Jordan may not be economically rewarding owing to the high cost of PV system compared to the cost of grid electricity. Techno-economic evaluation of off-grid hybrid photovoltaic–diesel–battery power systems for rural electrification in Saudi Arabia—A way forward for sustainable development Techno-economic viability of hybrid photovoltaic diesel battery power systems for residential loads in Saudi Arabia has been presented. 9 | P a g e Economic viability of stand-alone solar photovoltaic system in comparison with diesel-powered system for India Mohanlal Kolhea,, Sunita Kolhea , J.C. Joshib,1(2002). The economic feasibility of standalone PV system in comparison to the most likely conventional alternative system has been analyzed for energy demand through sensitivity analysis and the analysis shows that PV-powered systems are the lowest cost option at a daily energy demand of up to 15kWh 10 | P a g e Methodology: In our proposed project we divided the land that the PV system will be installed into two areas, one called the land with an area of 2000𝑚2 and the other is called the well which will be a roof topping with an area of 500𝑚2. The first thing we studied the area which the PV will be installed on, we designed the installations of the panels and taking into considerations the shading analysis between the arrays. And designed the proposed solutions which are the on-grid; true south 199.26KWp and 266.9KWp. and the hybrid solution, PV/Battery storage with the grid 69.36 KWp. The next step was to do the electrical diagram of each system, as each system consists of solar modules, inverters, DC and AC protection and earthing system. In each component of the system the ratings of each device are calculated to select the correct rating device in order to give the protection from over current production. After this process we gathered all of the components needed for each system and build a bill of quantity. We investigated the prices of the components in the Palestinian market so we can have a very close estimation of the cost of each proposal solution. At the end of our project and as we have all of the prices needed for each system we used Retscreen software application to do the economical analyzing, as the software has database of all of the locations around the world with the solar radiation for that location, we can expect the income savings of each system and thus we are able to know the simple payback period and the cost of energy and as well as the cost of the KWp of each system. 11 | P a g e CHAPTER 1: INTRODUCTION TO SOLAR ENERGY 12 | P a g e Chapter 1: Introduction to Solar energy Introduction Renewable energy is the key to a sustainable future, all other forms of energy will be eventually run out, whether it is oil within the next century or coal within the next several hundred, at some point in the future, we will need to be totally reliant in renewable forms or else we will have nothing left to "burn". Renewable energy is also a key to a sustainable future in that it has a much smaller environmental impact. The largest impact for many renewable forms is the damage done in getting the materials to make the machinery to harvest the energy. However, the overall impact in much smaller than the fossil fuels or nuclear energy, which has large extraction and waste problems, the drawbacks to use the renewable energy are availability and economics. Renewable energy sources contribute approximately 25% of the human energy use worldwide; the prime source of renewable energy is solar radiation, i.e. sunlight. Mankind's traditional uses of wind, water, and solar power are widespread in developed and developing countries, but the mass production of energy (electrical, thermal,……etc.), using renewable energy source has become popular only recently, reflecting the major threats if climate change due to pollution, concerns about exhaustion of fossil fuels, and the environmental, social and political of fossil fuels and nuclear power, many counters and organization promote renewable energies through taxes and subsidies. [1] 1.1 Electricity in Palestine (Challenges and difficulties) The energy sector acts as a key enabler across all industries. Access to a stable and reasonably priced energy supply is an important driver of economic growth: wastewater treatment plants, manufacturing sites, high tech-hubs, hotels, and many other facilities require reliable power in order to operate effectively. In addition, households require electricity for families to lead a comfortable life, schools need it to create a functional learning environment, and hospitals depend on it to provide a consistent quality of care for patients. [2] 1.2 Energy supply gaps are constraining economic growth The Palestinian economy is heavily dependent on energy imports with 90% of electricity currently. The remainder is generated by the Gaza Power Plant (GPP), which is fueled by imported gasoil. The majority of the imported electricity comes from Israel. [2] 13 | P a g e Figure 1: electricity imports and production Dependence on imports combined with the high cost of domestic production has led to a significant gap between supply and demand. According to interviews, in 2010, the annual electricity needed in the West Bank and Gaza was estimated to be around 6,200 GWh, while supply was only 4,300 GWh. As a result of structural supply shortages in 2008 the majority of Gazan households suffered power cuts of at least eight hours per day, with some having no electricity for up to 12 hours per day. While less of an issue in the West Bank, major energy supply issues continue to affect Gaza. A second problem is inadequate infrastructure. The world Bank estimates losses during distribution to be around 25%: Jordan experiences half this rate of loss and Israel’s losses are around 3%. By reducing dependence on energy imports and increasing utilization of renewable energy, ensuring resilient and sustainable energy supply, our analysis suggests that the Palestinian economy has an opportunity to produce up to 70% of its electricity needs domestically, with as much as 50% of production coming from renewable sources by 2030. If achieved, this could result in more than 17,000 new jobs (from less than 1,000 in 2012) and directly add up to $2.2 B to GDP.[2] 1.3: solar energy: Solar energy can be a major contributor to the future Palestinian energy supply, with its high potential in the area. Palestine receives about 3,000 hours of sunshine per year Domestic solar water heating (SWH) is widely used in Palestine where almost 70% of houses and apartments have such system. In fact, Palestine is one of the leading countries in the field of SWH for domestic purpose. Solar power has many types of technology to exploitation sunlight to produce energy. The following are used in Palestine.[3] a) Domestic solar water heater. b) Solar drying. c) Solar desalination and cooling. d) Photovoltaic. 14 | P a g e 1.4: addressing constraints in growth of the sector: There are four internal constraints that are largely within Palestinian control, which could be therefore feasibly addressed[3]: 1- insufficient energy storage and domestic electricity production facilities, such as gas-freed power plants. This results in the high level of dependence on imports. 2- A lack of incentives to encourage investment in renewable energy 3- Electricity policies do not encourage small-scale generation. 4- High rates of electricity theft, transmission losses and poor billing can result in extra cost being passed on to consumers who do regularly pay, driving up their prices 1.5 Solar radiation in Palestine Energy from sun travels to the earth in the form of electromagnetic radiation similar to radio waves, but in a different frequency range. Available solar energy is often expressed in units of energy per time per unit area, such as watts per square meter (W/m²). The amount of energy available from the sun outside the earth's atmosphere is approximately 1367.7 W/m²; some of the solar energy is absorbed as it passes through the earth's atmosphere. As a result, on a clear day the amount of solar energy available at the earth's surface in the direction of the sun is typically about 1000 W/m². at any particular time, the available solar energy is primarily dependent on time and current cloud conditions. Furthermore, useable solar energy is depended upon available solar energy, other weather conditions, the technology used, and the application, the Mean monthly and annual daily global radiations (MJ/m2/day) in Jerusalem shown is the next table[3]. Table 1: mean monthly and annual daily global radiation 15 | P a g e The Daily Average Global Solar Radiation (kWh/m².day) is given below Table 2The daily average global solar radiation (kWh/m2.day) 16 | P a g e CHAPTER 2: WATER PUMPING SYSTEM 17 | P a g e Chapter 2: Water Pumping system Introduction The farm has an area of 110 acres implanted with different kinds of crops that is locally used, the farm has a high consumption of water that is pumped over the whole area of the farm, as the pumping system removes water from a well into a water distribution network to cover the whole area of the farm. The pumping system consist of 3 pumps (120HP, 50HP and 70HP). Thus, makes the electricity bill very high. There is a utility grid connected to the farm with a transformer of 6.6 kv in order to feed it with electricity Figure 2:the pumping system 18 | P a g e Site view The farm that we are working on is oriented at Latitude 32.16 / Longitude 35.21 given below some tables defining exactly the parameters of our location. Figure 3: The plan of the farm Lat 32.16 Lon 35.21 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average 22-year Average 1.04 1.33 1.63 1.86 1.92 1.86 1.82 1.70 1.45 1.27 1.05 0.96 1.49 Minimum 0.93 1.12 1.30 1.64 1.67 1.73 1.64 1.56 1.28 1.09 0.98 0.82 1.31 Maximum 1.07 1.36 1.77 2.03 2.19 2.08 1.98 1.83 1.56 1.42 1.15 0.99 1.62 22-year Average K 0.48 0.49 0.54 0.59 0.64 0.67 0.67 0.65 0.64 0.58 0.53 0.48 0.58 Minimum K 0.44 0.35 0.45 0.53 0.57 0.63 0.64 0.62 0.61 0.51 0.43 0.40 0.52 Maximum K 0.56 0.60 0.65 0.65 0.69 0.70 0.70 0.68 0.68 0.64 0.57 0.58 0.64 Table 3:: Monthly Averaged Diffuse Radiation Incident on A Horizontal Surface (kWh/m2/day) Lat 32.16 Lon 35.21 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average 22-year Average 3.84 4.15 5.29 6.45 7.81 8.71 8.55 7.83 7.18 5.79 4.62 3.71 6.17 Table 4:: Monthly Averaged Direct Normal Radiation (kWh/m2/day) 19 | P a g e Lat 32.16 Lon 35.21 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Average 0950 0954 0948 0940 0936 0939 0946 0944 0935 0926 0924 0932 Table 5:Monthly Averaged Solar Noon (GMT time) Lat 32.16 Lon 35.21 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Average 10.3 11.0 11.9 12.9 13.8 14.2 14.0 13.3 12.4 11.4 10.5 10.1 Table 6:Monthly Averaged Daylight Hours (hours) Lat 32.16 Lon 35.21 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average 10-year Average 6.02 6.19 6.26 5.65 5.28 5.36 5.45 5.18 4.73 4.67 4.80 5.57 5.42 Table 7:Monthly Averaged Wind Speed At 50 m Above The Surface Of The Earth (m/s) Lat 32.16 Lon 35.21 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average Minimum -11 -14 -10 -9 -8 -9 -7 -5 -5 -8 -12 -14 -9 Maximum 13 19 12 12 9 7 6 5 5 10 10 15 10 Table 8: Minimum and Maximum Difference From Monthly Averaged Wind Speed At 50 m (%) 20 | P a g e Given below an aerial view of the farm. The farm is located in Taloza village – block number 43 – parcel number 10. We have divided the working area into two categories as follows: 1- The farm: Figure 4: the selected land to install PV The empty area above the meadow is our working area where we wish to install our system, this area is approximately 2 acres. 2- The water well: The farm consists of a water well to help irrigate the crops during drought seasons like summer, So the fact that some crops require constant irrigation led to a high electricity bill which is why the owner of the farm wishes to install PV system that helps him reducing his bill. Figure 5: the plan of the well In order to use the area of the well to we will consider building a structural frame to install our system on. 21 | P a g e Problem statement: The farm has an area of 110 acres implanted with different kinds of crops that is locally used, the farm has a high consumption of water that is pumped over the whole area of the farm which makes the electricity bill very high for the farmers. Furthermore, the electricity is supplied from Tubas distribution company and it faces many blackouts during the peak times on the grid. The Farm’s owner faces many losses of the crops due to these blackouts and so he wants a reliability of providing electricity and also as well, he wants saving in his electricity bill by doing a PV system in a small area of the farm that can’t be used for agriculture which equals 2.5 acres (2500𝑚2), divided into two parts; the land (2000𝑚2) and building roof on the top of the well area which is (500𝑚2). We have studied the possibilities of the methods that would fit in with the constrains that we have such in order to install our system on the ground, so we came out with these three solutions. 4- On-grid, True south oriented installed PV’s. On both (land and well). 5- On-grid, Horizontal oriented installed PV’s. On both (land and well). 6- Off-grid, True south oriented installed PV’s. only on the well. Furthermore, we will discuss each solution in details in the coming chapters and each solution will be provided with a Retscreen report for the financial issue and how feasible the solution is and also an environmental impact has been done to see the impact of installing the PV system on the around environment. 22 | P a g e Energy Bill: The energy bill for the farm is relatively a very high bill due to the pumping system to an open area of the farm. As can be noticed the peak of energy consumption from March to May each year. The farmer provided us, the energy bill for the whole year of 2017 as following in the table below. Taking in consideration the rate of KWH is 0.65NIS/KWH (0.184$/kwh) Month Energy Consumption Money Paid January 1494 971.3 February 13407 8714.84 March 20094 13061.18 April 67189 43673.35 May 94417 61371.14 June 16097 10463.61 July 15384 10000 August 15692 10200 September 16154 10500.5 October 16357 10632.5 November 15579 10126.5 December 7692 5000 Total 299562 194715 Table 9: Energy bill of the farm Figure 6: Energy Consumption of the farm 0 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000 Consumption KWH 23 | P a g e CHAPTER 3: COMPONENTS OF SOLAR SYSTEM 24 | P a g e Chapter 3: Components of Solar System 3.1 Solar module In the early 1950s, photovoltaic (PV) cells were developed as a spin-off of transistor technology. Very thin layers of pure silicon are impregnated with tiny amounts of other elements. When exposed to sunlight, small amounts of electricity are produced. Originally this technology was a costly source of power for satellites but it has steadily come down in price making it affordable to power homes and businesses [1]. Figure 7 from cell to array Cells Semiconductor device that converts sunlight into direct current (DC) electricity Modules PV modules consist of PV cell circuits sealed in an environmentally protective laminate and are the fundamental building block of PV systems Panels PV panels include one or more PV modules assembled as a pre-wired, field-installable unit Array A PV array is the complete power-generating unit, consisting of any number of PV modules and panels There are currently three commercial production technologies for PV Modules, the selection of solar modules should be based on various properties: Single Crystalline this is the oldest and more expensive production technique, but it's also the most efficient sunlight conversion technology available. Module efficiency averages about 10% to 12%. Polycrystalline or Multicrystalline this has a slightly lower conversion efficiency compared to single crystalline but manufacturing costs are also lower. Module efficiency averages about 10% to 11%. 25 | P a g e Amorphous or Thin Film Silicon material is vaporized and deposited on glass or stainless steel. The cost is lower than any other method. Module efficiency averages 5% to 7%. 3.2 inverters An inverter is an electrical circuit capable of turning DC power into AC power , while at the same time regulating the voltage , current, and frequency of the signal. A solar inverter, or converter or PV inverter, converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network [1]. Figure 8: DC and AC current waveform Working of Solar Inverter: Solar panels produce direct electricity with the help of electrons that are moving from negative to positive direction. Most of the appliances that we use at home work on alternative current. This AC is created by the constant back and forth of the electrons from negative to positive. In AC electricity the voltage can be adjusted according to the use of the appliance. As solar panels only produce Direct current the solar inverter is used to convert the DC to AC. An inverter produces square waves or a sine wave which can be used for running lights, televisions, lights, motors etc. However, these inverters also produce harmonic distortion. Expensive inverters make use of lots of steps to produce a sine wave and thus are found in residential solar inverters. Basically, inverters should be a large one so that it supplies enough power to all the necessary appliances. The wires attached on the silicon catch hold of these neutrons and while connecting to the circuit, current is formed. This then gives space for direct electricity and for converting that into alternate electricity an inverter is used so that the house appliances can run. As mentioned before major of the house appliances work on alternate current hence an inverter is used to convert DC to AC [1]. 26 | P a g e 3.3 monitoring The Net Monitoring technology allows to monitor as many inverters as we wish, without the need of special communication cards that are usually required by the inverter manufacturers and you also don't need to pay for the online monitoring, no matter what size of system you have. The monitoring system provides: 1- Real time energy information. 2- Renewable Energy monitoring. 3- Measurement and Verification of essential equipment (M&V) 4- Operations and Maintenance of asset portfolio (O&M) 5- Data export via push or pull with an open data API. 6- Lower energy cost. 7- Lower emission associated with fossil fuel energy. 8- Establish building energy benchmark and LEED points. 9- Peak Demand analysis. 10- Energy Efficiency projects and commissioning. 3.4 Protection: The selection of circuit protection devices for solar energy circuits is one area where designers pay a lot of attention for. These circuits may be used in systems ranging from residential-scale applications to those intended for large industrial facilities and grid-connected solar farms. Most of Protection parts get along with standards of International Electrotechnical Commission (IEC). For example, IEC 60364-7-712:2017 applies to the electrical installation of PV systems intended to supply all or part of an installation [4]. 3.4.1 Fuses: The most common first line of defense is fuses, a fuse, it must be selected to protect a PV source circuit operating at its short-circuit current rating, and also protect it in case of a fault on that circuit. Fuses, which are inherently passive devices, can be designed to be less costly than circuit breakers with the same performance characteristics. These PV system fuses and their testing are described in UL Standard 2579, Low-Voltage Fuses for Photovoltaic Systems, and IEC standard 60269-6[5+6] 3.4.2 circuit breakers DC circuit breaker DC string circuit-breaker in large systems prevent regeneration from intact modules to modules with a short-circuit. Their advantage over fuses is that they are immediately ready for use after a trip, and when the cause of the trip has been remedied. 27 | P a g e For the correct dimensioning of a circuit-breaker in a direct current network some electrical parameters which characterize the device itself must be evaluated.[5+6] 1. Rated operational voltage Ue It represents the value of voltage which determines the application of the equipment and to which all the other parameters typical of the equipment are referred. 2. Rated uninterrupted current Iu It represents the value of current which the equipment can carry for a indefinite time (uninterrupted duty). This parameter is used to define the size of the circuit-breaker. 3. Rated current In It represents the value of current which characterizes the protection trip unit mounted on the circuit- breaker and determines the protection characteristic of the circuit- breaker itself according to the available settings of the trip unit. This current is often referred to the rated current of the load protected by the circuit-breaker itself. [5+6] AC circuit breaker To protect the inverter, both DC input and AC output need to be protected. So AC Circuit Breakers are installed with different rates that suits the passing current through the AC wires to prevent any faults could occur. [5+6] 3.4 cables DC Cables A solar cable is the interconnection cable used in photovoltaic power generation. Solar cables interconnect solar panels and other electrical components of a photovoltaic system. Solar cables are designed to be UV resistant and weather resistant. They can be used within a large temperature range and are generally laid outside. Individual modules are connected using cables to form the PV generator. The module cables are connected into a string which leads into the generator junction box, and a main DC cable connects the generator junction box to the inverter. In order to eliminate the risk of ground faults and short circuits, the positive and negative cables, each with double insulation, are laid separately. [5+6] 3.5 lighting protection system. Lightning protection is a common cause of failures in photovoltaic (PV). A damaging surge can occur from lightning that strikes a long distance from the system, or even between clouds. But most lightning damage is preventable. for preventing these effects, lighting protection is a must to install in solar systems.[7] A lighting protection system consist of: 1- One or more air termination 28 | P a g e 2- Earthing conductor 3- Separate electrode The earth-termination system of the PV system is designed as a ring earth electrode (surface earth electrode); whilst the earth-termination system of the operation building should be designed as a foundation earth electrode. The metal supporting frames, onto which the PV modules are fixed, must be connected to the earth- termination Lightning and surge protection for PV systems on solar plants By A Bar wise, DEHN Protection South Africa Measures to protect the sensitive electronic system components from failure due to lightning flashes and surges are essential. The earth-termination system of the PV system and the one of the operation building, have to be connected to each other via at least one conductor. [7] Surge lighting equipotential bonding in principle, all conductive systems entering the operation building from outside have to be generally included into the lightning equipotential bonding. The requirements of lightning equipotential bonding are fulfilled by the direct connection of all metal systems and by the indirect connection of all live systems via lightning current arresters. Lightning equipotential bonding should be performed preferably near the entrance of the structure in order to prevent partial lightning currents from penetrating the building. The conductor in lighting protection is 70 mm2 standard to carry the very high current come from the lighting.[7] Surge protection Powerful surge Protection Devices used for installations and buildings with high lighting strike risk. They contribute to the safety of equipment. Surge Arresters ensure continuity of service of installation and divided into two categories; DC surge arresters and AC surge Arresters. [7] DC surge arresters It is connected to each string of the inverters after the fuses and placed in the DC protection panel that is near the inverter input. An Earth wire in the surge arrester is connected to the DC Earthing Base bare. AC surge arresters It is connected to each AC wire comes out from the inverter and placed in the AC protection panel that is near the inverter output. An Earth wire in the surge arrester is connected to the AC Earthing Base bare. 3.6 Earthing Ground defines as “the earth,” these words can mean connected, or connecting, to the earth. More often they mean connected, or connecting, to a conductive device that is connected to the earth. The electric potential of the earth is assumed to be zero. [7] We need the ground system to discharge the high current in the earth if the system is ungrounded the current will reverse then may be causes fires and the same thing when open circuit happen. 29 | P a g e In AC systems, the grounded conductor is also known as the neutral conductor. DC systems can be negatively or positively grounded—based on the polarity of the grounded conductor—or ungrounded. The DC system grounding connection is accomplished through the main bonding jumper or, in the case of separately derived systems, via the system bonding jumper. System grounding on the DC side of a PV system generally occurs via a ground-fault protection circuit that is internal to a listed inverter. [7] When install the earthing we must be careful to: • provided that earthing conductors shall have a minimum size of 6.0 mm2 copper, 10 mm2 aluminum or 70 mm2 hot dip galvanized steel. Unprotected aluminum or copper-clad aluminum conductors shall not be used for final underground connections to earth electrodes. • A minimum of two separate dedicated and interconnected earth electrodes must be used for the earthing of the solar PV system support structure with a total earth resistance not exceeding 5 Ohm. • When install the earthing we must do that after any ampere carry in the system. The output of the PV module is DC but the output of the invertor is AC so we have two grounded system to the DC and AC but when we install it we must use one of three methods: [7] (1) Separate Direct-Current Grounding Electrode System Bonded to the Alternating-Current Grounding Electrode System. A separate DC grounding electrode or system shall be installed, and it shall be bonded directly to the ac grounding-electrode system. The size of any bonding jumper(s) between ac and dc systems shall be based on the larger size of the existing ac grounding electrode conductor or the size of the dc grounding electrode conductor. The dc grounding electrode system conductor(s) or the bonding jumpers to the ac grounding electrode system shall not be used as a substitute for any required ac equipment grounding conductors. (2) Common Direct-Current and Alternating-Current Grounding Electrode. A dc grounding electrode conductor, shall be run from the marked DC grounding electrode connection point to the AC grounding electrode. Where an AC grounding electrode is not accessible, the DC grounding electrode conductor shall be connected to the AC grounding electrode conductor. This DC grounding electrode conductor shall not be used as a substitute for any required ac equipment grounding conductors. Figure 9:Common DC and AC Grounding Electrode 30 | P a g e (3) Combined DC Grounding-Electrode Conductor and AC Equipment Grounding Conductor. An unspliced, or irreversibly spliced, combined grounding conductor shall be run from the marked DC grounding electrode conductor connection point along with the AC circuit conductors to the grounding busbar in the associated ac equipment. This combined grounding conductor shall be the larger. Although any of the three methods of making connections to the inverter grounding electrode terminal may be used, there are advantages and disadvantages to each. [7] Figure 10: Combined DC Grounding-Electrode Conductor and AC Equipment Grounding Conductor 3.7 RCD protection An RCD, or residual current device, is a life-saving device which is designed to prevent you from getting a fatal electric shock if you touch something live, such as a bare wire. It can also provide some protection against electrical fires. RCDs offer a level of personal protection that ordinary fuses and circuit-breakers cannot provide. [7] 31 | P a g e CHAPTER 4: TRUE SOUTH ORIENTED DESIGN 32 | P a g e Chapter 4: True South Oriented Design Introduction: In this solution we used both areas that can PV installed on; the land and well, an overall area of 2500𝑚2. This system will be connected with grid in net metering tariff which is a method designed to accelerate investments in renewable energy by allowing energy producers to be compensated for the energy they feed back into the grid. Tubas electricity distribution company takes 10% as services of the energy produced from the PV system and the other 90% of generated electricity will be discounted from the electricity bill, and if the production of energy exceeds of the energy consumed, the bi-directional net-metering will save the credits of the excess energy for the coming months and so on till the end of year, if any energy is consumed more then money should be paid and if the annual energy production exceeds then in this case no money returns to the producer. In this case 199.24 KWp will be connected into the grid divided as 127.84KWp (17 ˚ tilted angle) installed on the land and 71.4 KWp (27˚ tilted angle) installed as roof toping of the well. 4.1 Solar Modules For our design we are going to use the module from Hanwha Q cell, named as: Q. plus-L-G4.2,330-340 with the following specifications PV module specification Type Q. plus-L-G4.2,330-340 Maximum power (P max) 340 Wp Maximum voltage (V max) 37.63 V Maximum current (I max) 9.03 A Short circuit current (I s.c) 9.59 A Open circuit voltage (V o.c) 47.07 V Efficiency 17.4% Table 10: PV Module specification The total number of PV modules is 586. With a power of 340w for each, deliever a power of 199.24 KWp distributed as following. Tilt Angle True South 17˚ 376 Land 27˚ 210 Well 586 Total Table 11: PV modules in south oriented 33 | P a g e The below picture is an overview of the whole farm without installing anything. Figure 11:The plan of the farm we took a 3-m space from the fence in the farm to the PV’s so the fence won’t cause any shading to the PV’S plus it is a space for any working or maintenance that would be held in the future and in the south east of the farm a service room will be built to have the land system connections and inverters. We took 1.5-m as shading between the PV’s the calculation of shading as following 4.2 Shading analysis Shading analysis is one of the most essential steps in phase of solar energy system design or analysis. In photovoltaic it is important to analyze shading caused by surrounding objects and/or vegetation. The availability of Photovoltaic (PV) and increased interest in using and installing this system encourages the need to review the methodologies and assumptions used to develop. Shading Calculations: Depending on J.K Copper’s method to calculate array spacing of Photovoltaic systems using vector analysis. The proposed values are: * Tilt angle = 17 ̊ An array consists of three PV modules (three rows) 34 | P a g e Figure 12: shading analysis Eq 1 : 𝑆 = 𝐻 𝑡𝑎𝑛 𝑉𝑆𝐴 Eq 2 𝐻 = 𝑆𝑖𝑛 𝐵𝑎 ∗ 𝑊𝑝 Eq 3 :tan VSA = tan αs cos ɸ As: :s : Altitude angle. ɸs : Azimuth angle of the sun. ɸc : Azimuth angle of the collector . Ba : Tilt angle Wp : PV width S : Shading distance considering the maximum self-shading on the 21st of December at 14:00 , αs at 14:00 = 25.07 ɸs at 14:00 = 215.87 ɸc = 180 ̊ from North then: tan VSA = tan 25.07 cos (215.87 − 180) tan VSA = 0.47 0.81 Tan VSA = 0.5775 𝐻 = 𝑆𝑖𝑛 17 ∗ 2.98 35 | P a g e H = 0.8713 Back to Eq 1 : 𝑆 = 0.8713 0.5775 S = 1.51 meter PV modules distribution for the land area The following figure descirbes the destribution of the PV modules in the land after taking cosideration of both the service road and the shading area between the modules arrays. We used Autocad software inorder to sketch the following plan. Figure 13: PV modules distributed in the land 36 | P a g e PV modules distribution for the well roofing area: The area of the well is (500𝑚2) and we need to get as much as we can of this area in order to get the max power of the modules installed, thus we used the same method as for the land with Tilt angle =27˚, but without doing separated arrays here we have smaller. Thus these modules will be installed on a tough roof (27˚ tilted to south) in order to have the max number of modules on that roof, so no shading between arrays should be calculated. Figure 14: PV modules distributed on the roof of the well 37 | P a g e 4.3 Inverters For our design we have selected ABB module TRIO inverter, named as: TRIO-20.0/27-Tl-OULT, PVI- 10/12 and TRIO 5.8/8.5 The following table shows the specifications of these inverters then following them with the calculations to size the inverters that are needed for the true south oriented solution. Inverter specification type 20Kw 10KW 5.8 Kw Max abs DC input 1000v 1000v 1000v Number of mppt 2 2 1 DC input volt range (mppt) 440-800 300-750 320-800 DC max input current (mppt) 30A 22A 24A DC rated power 20750w 10300w 5950w AC voltage range 400V 400V 400V AC Max current 33A 16A 10A Max. efficiency 98.2% 97.3% 98% Table 12: ABB inverters specifications 1- size the inverters for the land: total number of panels for the land = 376 panels for the panels: Imppt=9.03 Vmppt=37.63 for each inverter MPPT 15(panels)*37.63(vmppt)= 564.45 (in range of 20KW inverter) 2(arrays of panels) *9.03= 18.06A (less than the max current for mppt of the inverter) Number of panels for each MPPT = 15*2 = 30 Panels Number of panels for 2 MPPTs (one inverter 20KW) = 30*2 = 60 panels Total number of panels for the land design = 376 panels Number of (20 KW inverters) = 6 inverters (6*20 = 120 KW) Total number of panels = 6*60 = 360 panels (360*0.34KW/Panel = 122.4KW) But total number of the land design = 376 16 panels need another inverter so (16*0.34KW) = 5.44 so we choose 5.8KW Number of mppt for 5.8 inverter is 2 but we use one mppt 16panels * 37.63 v/panel = 602.08 V ( in range ) 2- size the inverters for the well: 38 | P a g e total number of panels for the well = 210 panels for the panels: Imppt=9.03 Vmppt=37.63 for each inverter MPPT 15(panels)*37.63(vmppt)= 564.45 (in range of 20KW inverter) 2(arrays of panels) *9.03= 18.06A (less than the max current for mppt of the inverter) Number of panels for each MPPT = 15*2 = 30 Panels Number of panels for 2 MPPTs (one inverter 20KW) = 30*2 = 60 panels Total number of panels for the land design = 210 panels Number of (20 KW inverters) = 3 inverters (3*20 = 60KW) Total number of panels = 3*60 = 180 panels (180*0.34KW/Panel = 61.2KW) But total number of the land design = 210 30 panels need another inverter so (30*0.34KW) = 10.2Kw so we choose 10KW inverter Number of mppt for 10KW inverter is 2 For each MPPT: 15panels * 37.63 v/panel = 564.45 V ( in range ) 1(arrays of panels) * 9.03 = 18.06A (less than the Imax of each mppt) So total number of panels connected to the inverter = 15panels*2mppt = 30 panels 20KW 10KW 5.8 Land 6 0 1 Well 3 1 0 total 9 1 1 Table 13: total number of inverters for the south oriented 39 | P a g e 4.4 Mentoring system The Net Monitoring technology allows to monitor as many inverters as we wish, without the need of special communication cards that are usually required by the inverter manufacturers and you also don't need to pay for the online monitoring, no matter what size of system you have. The monitoring system provides: 1- Real time energy information. 2- Renewable Energy monitoring. 3- Measurement and Verification of essential equipment (M&V) 4- Operations and Maintenance of asset portfolio (O&M) 5- Data export via push or pull with an open data API. 6- Lower energy cost. 7- Lower emission associated with fossil fuel energy. 8- Establish building energy benchmark and LEED points. 9- Peak Demand analysis. 10- Energy Efficiency projects and commissioning. We used eGauge Systems EG3000 Meter ANSI C12.1 - 1% Compliance w/ Ethernet. Table below shows the characteristics of EG3000 meter. Mfr. Part #: A000-ETH-016 CS Part #: cs-300351 Dimensions: 6.94 × 3.25 × 1.3 in Weight: 0.5 lb Table 14:eGauge mentoring system specifications https://www.civicsolar.com/product/egauge-systems-eg3000-meter-ansi-c121-1-compliance-w-ethernet 40 | P a g e 4.5 Cables 1- DC cables We used two ratings for DC cables, which are (4m𝑚2 and 6 m𝑚2) depending on the location of the DC side, for each string we use 4m𝑚2 and when it delivers to the combined box where 2 strings join together to go to the inverter, then 6m𝑚2 will be used as following: Before DC combined box, I=9.03A – DC cables 4m𝑚2 After DC combined box, I=18.06A – DC cables 6m𝑚2 2-AC cables The following table shows the cross-section areas of the AC cables after the inverters until the bi- directional metering Table 15: cross section area of AC cables and their location 4.5 Protection 1- DC side Circuit Breakers We used DC Circuit Breakers (20A/10 A &1000 volt) as each MPPT of the inverters has a current value of 9.03 A, one for every string and connected in the protection panel. Location AC current AC cable The output of each inverter 30 A AC cables (4*16 mm) AC CB’s (40 A) the AC cable goes from land`s room to the largest AC Base Bare in well`s room and the cable from AC Base Bare of well`s inverters to the largest AC Base Bare. 144 A AC cables (70 mm) AC CB’s (150 A) the AC cable goes from the largest AC base bare to the bi-directional metering. 234 A AC cables (150 mm) AC CB’s (250 A) 41 | P a g e Fuse It is connected to each string of the inverters and the used one in our project is 15 A that is recommended in the inverter`s data sheet. And it comes along with a Fuse Holder; which is a mechanical part used for connecting two fuses. AC Surge Arresters It is connected to each string of the inverters after the fuses and placed in the DC protection panel that is near the inverter input. An Earth wire in the surge arrester is connected to the DC Earthing Base bare, the rating of the surge arrester is (1000v 40KA) NO. DC Surge Arresters No. DC C.B 20A NO. DC C.B 10A NO. fuse holders NO. fuses NO. Invertors 25 12 1 25 25 7 Land 18 8 2 18 18 4 Well Table 15: DC protection of south oriented design 2- AC side AC Circuit Breakers We used AC Circuit Breakers (40A/15 A &1000 volt) as each inverter has a max current value of 9.03*2*0.9*2 A=32.5 and also as well AC protection is needed after the bass bare of gathering the output of the AC side after the inverters such as (100A/250A AC CB). NO. AC C.B (250 A) NO. AC C.B (100 A) No. AC C.B (15A) NO. AC C.B (40 A) NO. Invertors 1 0 1 6 7 Land 0 1 1 3 4 Well Table 16: AC protection of South oriented design 42 | P a g e AC surge arresters It is connected to each AC wire comes out from the inverter and placed in the AC protection panel that is near the inverter output. An Earth wire in the surge arrester is connected to the AC Earthing Base bare. We used AC surge arrester of 40 A and 1000 volt RCD An RCD, or residual current device, is a life-saving device which is designed to prevent you from getting a fatal electric shock if you touch something live, such as a bare wire. It can also provide some protection against electrical fires. RCDs offer a level of personal protection that ordinary fuses and circuit-breakers cannot provide. NO. of RCD NO. AC Surge Arrester 1 8 Land 1 5 well Table 17: AC protection of south oriented design 4.6 Bill of Quantity A bill of quantity has been made which itemized list of the materials and components with their prices that are required to install the PV for the south oriented design, and it is important to expect the costs of the installations. 4.6.1 BOQ for land type # of units unit cost total cost PV 127.84 450 57528 $ Inveter 20KW 6 3488 20928 $ Inveter 5.8KW 1 1000 1000 $ Internet connected Monitoring system 1 1700 1700 NIS steel mounting structure 376 238 89488 NIS DC PROTECTION fuse 15A 25 32 800 NIS fuse holder 25 32 800 NIS DC CCT breaker 10A 1 246 246 NIS DC CCT breaker 20A 12 250 3000 NIS surge protection 25 285 7125 NIS DC combiner Box 8 71 568 NIS DC base bar 12 25 300 NIS 43 | P a g e AC PROTECTION AC CCT breaker 40A 6 185 1110 NIS AC CCT breaker 20A 1 150 150 NIS Surge protection 8 335 2680 NIS AC combiner boxes 7 2000 14000 NIS AC cables (16mm)/meter 16 7 112 NIS AC cables (150mm)/meter 215 253 54395 NIS RCD 400mA 1 400 400 NIS AC base bar 1 25 25 NIS Earth base bar 1 25 25 NIS AC CB 250A 1 746 746 NIS Table 18: BOQ of land in south oriented design 4.6.2 Well BOQ type # of units unit cost total cost PV 71.4 450 32130 $ Inveter 20KW 3 3488 10464 $ Inveter 10KW 1 1744 1744 $ Internet connected Monotring system 1 1700 1700 NIS Roofing 490 50 24500 NIS DC PROTECTION fuse 15A 18 32 576 NIS fuse holder 18 32 576 NIS DC CCT breaker 10A 2 246 492 NIS dC CCT breaker 20A 8 250 2000 NIS surge protection 18 285 5130 NIS DC combiner Box 4 71 284 NIS DC Passbar 4 25 100 NIS AC PROTECTION AC CCT breaker 40A 3 185 555 NIS AC CCT breaker 20A 1 150 150 NIS Surge protection 4 335 1340 NIS AC combiner boxes 4 2000 8000 NIS AC cables (16mm)/meter 10 7 70 NIS AC cables (70mm)/meter 5 118 590 NIS RCD 400mA 1 400 400 NIS AC Passbar 1 25 25 NIS Earth Passbar 1 25 25 NIS MCB 150A 1 150 150 NIS Table 19: BOQ of well in south oriented design 44 | P a g e 4.6.3 combination of land and well BOQ TYPE # OF UNITS COST OF UNIT TOTAL COST DC CABLES (6MM)/METER 2500 3.6 9000 NIS AC CCT BREAKER 400A 2 746 1492 NIS RCD 400MA 1 400 400 NIS KWH GENERTATION METERING 1 91 91 NIS BI-DIRECTIONAL METER 1 196 196 NIS COMBINATION BOX 1 1600 1600 NIS AC CABLE (150MM)/METER 3 253 759 NIS UNCOVERED CABLE 25MM/METER 18 12 216 NIS EARTHING BIT DC 6 54 324 NIS EARTHING BIT AC 6 54 324 NIS ELECTRODES 6 280 1680 NIS LIGHTING PROTECTION 1 7000 7000 NIS EARTH CABLE(30MM)/METER 1130 13.2 14916 NIS EARTH BASE BARE 4 25 100 NIS CONNECTORS 6 45 270 NIS ACCESOARIES 1 1500 1500 NIS Table 20:BOQ of the combination of the well and land for the south oriented design The sum of these costs is used in Retscreen to do the financial report as following in the next section. 4.7 Restscreen The RetScreen Clean Energy Project Analysis Software is a tool that helps with decision making allowing engineers, architects, and financial planners to model and analyze any clean energy project. The technologies included in RetScreen’s project models are all-inclusive and include both traditional and non-traditional sources of clean energy as well as conventional energy sources and technologies. In this project, RetScreen was used to help us make a detailed study for a photovoltaic power plant in Talloza used to pump water from three different pumps used for irrigation. The Following files are for the south oriented, both the well and land separately. 45 | P a g e Clean Energy Project Analysis Software Project information See project database Project name water pumping - 199.24kW - on grid Project location Talluza – The LAND Prepared for power plant Prepared by , bahaa majadleh, mohammed ateri Project type Power Technology Photovoltaic Grid type Central-grid Analysis type Method 2 Heating value reference Higher heating value (HHV) Show settings Language - Langue English - Anglais User manual English - Anglais Currency $ Symbol Units Metric units Site reference conditions Select climate data location Climate data location Jericho Show data Climate data Unit location Project location Latitude ˚N 31.9 31.9 Longitude ˚E 35.5 35.5 Elevation m -275 -275 Heating design temperature °C 5.0 Cooling design temperature °C 32.9 Earth temperature amplitude °C 23.1 Daily solar Relative radiation - Atmospheric Earth Heating Cooling Month Air temperature humidity horizontal pressure Wind speed temperature degree-days degree-days °C % kWh/m²/d kPa m/s °C °C-d °C-d January 10.6 58.7% 2.80 96.3 4.5 11.7 229 19 February 11.4 54.0% 3.50 96.2 4.6 13.3 185 39 March 14.2 50.8% 4.60 96.0 4.7 17.5 119 129 April 18.9 41.7% 6.00 95.8 4.4 23.9 0 266 May 22.2 41.2% 7.10 95.8 4.1 28.3 0 378 June 24.3 45.5% 7.90 95.6 4.1 31.2 0 428 July 26.0 46.9% 7.80 95.4 4.1 33.7 0 496 August 26.4 49.1% 7.20 95.5 3.9 33.8 0 508 September 25.0 49.3% 6.00 95.8 3.6 31.2 0 451 October 21.7 52.8% 4.70 96.0 3.7 25.5 0 363 November 17.0 52.0% 3.40 96.2 3.7 18.8 30 210 December 12.3 56.5% 2.60 96.3 4.1 13.3 175 73 Annual 19.2 49.9% 5.31 95.9 4.1 23.6 738 3,359 Measured at m 10.0 0.0 Complete Energy Model sheet RETScreen4 2012-06-01 © Minister of Natural Resources Canada 1997-2012. NRCan/CanmetENERGY 46 | P a g e RETScreen Energy Model - Power project Show alternative units Proposed case power system Incremental initial costs Technology Photovoltaic Analysis type  Method 1  Method 2 Photovoltaic Resource assessment Solar tracking mode Fixed Slope ° 17.0 Azimuth ° 0.0  Show data Daily solar radiation - Daily solar Electricity Electricity Month horizontal radiation - tilted export rate exported to grid kWh/m²/d kWh/m²/d $/MWh MWh January 2.80 3.50 166.2 12.84 February 3.50 4.05 166.2 13.30 March 4.60 5.03 166.2 17.94 April 6.00 6.19 166.2 20.75 May 7.10 6.96 166.2 23.64 June 7.90 7.54 166.2 24.43 July 7.80 7.53 166.2 25.00 August 7.20 7.30 166.2 24.17 September 6.00 6.49 166.2 21.03 October 4.70 5.51 166.2 18.87 November 3.40 4.27 166.2 14.63 December 2.60 3.33 166.2 12.12 Ann 5.31 5.65 166.20 228.72 Annual solar radiation - horizontal MWh/m² 1.94 Annual solar radiation - tilted MWh/m² 2.06 Photovoltaic Type poly-Si Power capacity kW 127.84 See product database Manufacturer hanwha Model Q.Plus L-G4.2 330-340 1 unit(s) Efficiency % 17.1% Nominal operating cell temperature °C 45 °F 113.0 Temperature coefficient % / °C 0.40% Solar collector area m² 748 ft² 8,047 Control method Maximum power point tracker Miscellaneous losses % 3.0% Inverter Efficiency % 98.2% Capacity kW 35.8 Miscellaneous losses % 2.0% Summary Capacity factor % 20.4% Electricity delivered to load MWh 0.00 Electricity exported to grid MWh 228.72 Fuel rate - proposed case power system $/MWh 0.00 $/kWh 0.000 Electricity export rate $/MWh $/kWh 0.166 47 | P a g e Settings Method 1 Notes/Range Second currency Method 2 Second currency Notes/Range None Cost allocation Initial costs (credits) Unit Quantity Unit cost Amount Relative costs Feasibility study Site investigation p-d $ - Resource assessment project $ - Environmental assessment p-d $ - Preliminary design p-d $ - Detailed cost estimate p-d $ - GHG baseline study & MP project $ - Report preparation p-d $ - Project management p-d $ - Travel & accommodation p-trip 1 $ 641 $ 641 User-defined cost $ - $ - Subtotal: $ 641 0.4% Development Contract negotiations p-d $ - Permits & approvals p-d 1 $ 234 $ 234 Site survey & land rights p-d $ - GHG validation & registration project $ - Project financing p-d $ - Legal & accounting p-d 2 $ 300 $ 600 Project management p-d $ - Travel & accommodation p-trip $ - User-defined cost $ - $ - Subtotal: $ 834 0.5% Engineering Site & building design p-d 1 $ 5,000 $ 5,000 Mechanical design p-d 1 $ 1,828 $ 1,828 Electrical design p-d 1 $ 10,969 $ 10,969 Civil design p-d 1 $ 5,484 $ 5,484 Tenders & contracting p-d $ - Construction supervision p-d $ - civil work cost 1 $ 16,500 $ 16,500 employees 6 $ 856 $ 5,133 Subtotal: $ 44,914 24.5% Power system Photovoltaic kW 127.84 $ 450 $ 57,528 Road construction km $ - Transmission line km $ - Substation project $ - Energy efficiency measures project $ - User-defined cost $ - $ - Subtotal: $ 57,528 31.4% Balance of system & miscellaneous Specific project costs Photovoltaic Inverter kW 126 $ 174 $ 21,940 Collector support structure m² $ - Installation project 1 $ 57,253 $ 57,253 Building & yard construction m² $ - Spare parts % $ - Transportation project $ - Training & commissioning p-d $ - User-defined cost 0 $ - $ - Contingencies % $ 183,110 $ - Interest during construction 2 month(s) $ 183,110 $ - Subtotal: $ 79,193 43.2% Total initial costs $ 183,110 100.0% Annual costs (credits) Unit Quantity Unit cost Amount O&M Land lease & resource rental project $ - Property taxes project $ - Insurance premium project $ - Parts & labour project $ - GHG monitoring & verification project $ - Community benefits project $ - General & administrative % $ - $ - User-defined cost 1 $ 380 $ 380 Contingencies % $ 380 $ - Subtotal: $ 380 Periodic costs (credits) Unit Year Unit cost Amount User-defined cost $ - $ - End of project life cost $ - 48 | P a g e Financial parameters Project costs and savings/income summary Yearly cash flows General Initial costs Year Pre-tax After-tax Cumulative Fuel cost escalation rate % Feasibility study 0.4% $ 641 # $ $ $ Inflation rate % 1.0% Development 0.5% $ 834 0 -183,110 -183,110 -183,110 Discount rate % Engineering 24.5% $ 44,914 1 37,630 37,630 -145,479 Project life yr 25 Power system 31.4% $ 57,528 2 37,626 37,626 -107,853 Heating system 0.0% $ 0 3 37,622 37,622 -70,231 Finance Cooling system 0.0% $ 0 4 37,619 37,619 -32,612 Incentives and grants $ User-defined 0.0% $ 0 5 37,615 37,615 5,002 Debt ratio % 0.0% Energy efficiency measures 0.0% $ 0 6 37,611 37,611 42,613 Debt $ 0 Balance of system & misc. 43.2% $ 79,193 7 37,607 37,607 80,220 Equity $ 183,110 Total initial costs 100.0% $ 183,110 8 37,602 37,602 117,822 Debt interest rate % 9 37,598 37,598 155,420 Debt term yr Incentives and grants $ 0 10 37,594 37,594 193,015 Debt payments $/yr 0 11 37,590 37,590 230,605 Annual costs and debt payments 12 37,586 37,586 268,190 O&M $ 380 13 37,581 37,581 305,772 Income tax analysis  Fuel cost - proposed case $ 0 14 37,577 37,577 343,349 Effective income tax rate % Debt payments - 0 yrs $ 0 15 37,573 37,573 380,922 Loss carryforward? No Total annual costs $ 380 16 37,568 37,568 418,490 Depreciation method Declining balance 17 37,564 37,564 456,054 Half-year rule - year 1 yes/no Yes Periodic costs (credits) 18 37,559 37,559 493,614 Depreciation tax basis % $ 0 19 37,555 37,555 531,169 Depreciation rate % $ 0 20 37,550 37,550 568,719 Depreciation period yr 15 End of project life - cost $ 0 21 37,546 37,546 606,265 Tax holiday available? yes/no No 22 37,541 37,541 643,806 Tax holiday duration yr Annual savings and income 23 37,536 37,536 681,342 Fuel cost - base case $ 0 24 37,531 37,531 718,873 Annual income Electricity export income $ 38,014 25 37,527 37,527 756,400 Electricity export income GHG reduction income - 0 yrs $ 0 26 0 0 756,400 Electricity exported to grid MWh 229 Customer premium income (rebate) $ 0 27 0 0 756,400 Electricity export rate $/MWh 166.20 Other income (cost) - yrs $ 0 28 0 0 756,400 Electricity export income $ 38,014 CE production income - yrs $ 0 29 0 0 756,400 Electricity export escalation rate % Total annual savings and income $ 38,014 30 0 0 756,400 31 0 0 756,400 GHG reduction income  32 0 0 756,400 tCO2/yr 0 33 0 0 756,400 Net GHG reduction tCO2/yr 0 Financial viability 34 0 0 756,400 Net GHG reduction - 25 yrs tCO2 0 Pre-tax IRR - equity % 20.3% 35 0 0 756,400 GHG reduction credit rate $/tCO2 Pre-tax IRR - assets % 20.3% 36 0 0 756,400 GHG reduction income $ 0 37 0 0 756,400 GHG reduction credit duration yr After-tax IRR - equity % 20.3% 38 0 0 756,400 Net GHG reduction - 0 yrs tCO2 0 After-tax IRR - assets % 20.3% 39 0 0 756,400 GHG reduction credit escalation rate % 40 0 0 756,400 Simple payback yr 4.9 41 0 0 756,400 Customer premium income (rebate)  Equity payback yr 4.9 42 0 0 756,400 Electricity premium (rebate) % 43 0 0 756,400 Electricity premium income (rebate) $ 0 Net Present Value (NPV) $ 756,400 44 0 0 756,400 Heating premium (rebate) % Annual life cycle savings $/yr 30,256 45 0 0 756,400 Heating premium income (rebate) $ 0 46 0 0 756,400 Cooling premium (rebate) % Benefit-Cost (B-C) ratio 5.13 47 0 0 756,400 Cooling premium income (rebate) $ 0 Debt service coverage No debt 48 0 0 756,400 Customer premium income (rebate) $ 0 Energy production cost $/MWh 33.92 49 0 0 756,400 GHG reduction cost $/tCO2 No reduction 50 0 0 756,400 49 | P a g e Clean Energy Project Analysis Software Project information See project database Project name water pumping well Project location talluza - well Prepared for power plant Prepared by Bahaa Majadleh Mohammed ateri Project type Power Technology Photovoltaic Grid type Central-grid Analysis type Method 2 Heating value reference Higher heating value (HHV) Show settings Language - Langue English - Anglais User manual English - Anglais Currency $ Symbol Units Metric units Site reference conditions Select climate data location Climate data location Jericho Show data Climate data Unit location Project location Latitude ˚N 31.9 31.9 Longitude ˚E 35.5 35.5 Elevation m -275 -275 Heating design temperature °C 5.0 Cooling design temperature °C 32.9 Earth temperature amplitude °C 23.1 Daily solar Relative radiation - Atmospheric Earth Heating Cooling Month Air temperature humidity horizontal pressure Wind speed temperature degree-days degree-days °C % kWh/m²/d kPa m/s °C °C-d °C-d January 10.6 58.7% 2.80 96.3 4.5 11.7 229 19 February 11.4 54.0% 3.50 96.2 4.6 13.3 185 39 March 14.2 50.8% 4.60 96.0 4.7 17.5 119 129 April 18.9 41.7% 6.00 95.8 4.4 23.9 0 266 May 22.2 41.2% 7.10 95.8 4.1 28.3 0 378 June 24.3 45.5% 7.90 95.6 4.1 31.2 0 428 July 26.0 46.9% 7.80 95.4 4.1 33.7 0 496 August 26.4 49.1% 7.20 95.5 3.9 33.8 0 508 September 25.0 49.3% 6.00 95.8 3.6 31.2 0 451 October 21.7 52.8% 4.70 96.0 3.7 25.5 0 363 November 17.0 52.0% 3.40 96.2 3.7 18.8 30 210 December 12.3 56.5% 2.60 96.3 4.1 13.3 175 73 Annual 19.2 49.9% 5.31 95.9 4.1 23.6 738 3,359 Measured at m 10.0 0.0 Complete Energy Model sheet RETScreen4 2012-06-01 © Minister of Natural Resources Canada 1997-2012. NRCan/CanmetENERGY 50 | P a g e RETScreen Energy Model - Power project Show alternative units Proposed case power system Incremental initial costs Technology Photovoltaic Analysis type  Method 1  Method 2 Photovoltaic Resource assessment Solar tracking mode Fixed Slope ° 27.0 Azimuth ° 0.0  Show data Daily solar radiation - Daily solar Electricity Electricity Month horizontal radiation - tilted export rate exported to grid kWh/m²/d kWh/m²/d $/MWh MWh January 2.80 3.81 166.2 7.755 February 3.50 4.26 166.2 7.771 March 4.60 5.14 166.2 10.205 April 6.00 6.12 166.2 11.453 May 7.10 6.70 166.2 12.722 June 7.90 7.15 166.2 12.977 July 7.80 7.18 166.2 13.348 August 7.20 7.13 166.2 13.202 September 6.00 6.57 166.2 11.873 October 4.70 5.81 166.