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Graduation Project Submitted in Partial Fulfillment of The Requirements for The Degrees of B.Sc. In Mechatronics & Mechanical Engineering
Robotic exoskeleton systems are one of the hottest subjects in robotic research right now. These systems have undergone extensive development in order to be used in the assessment of human power and robotic rehabilitation. Unlike industrial robots, robotic exoskeleton systems require unique consideration in terms of mechanical and control approaches since they interface directly with humans. Moving ranges, safety, comfort wearing, low inertia, and adaptability should all be taken into account while designing these systems mechanically. The controllers of exoskeleton systems should prioritize controllability, responsiveness, flexible and smooth motion generation, and safety. In addition, the controller should generate motions that are consistent with the human motion goal. The purpose of this report is to provide an overview of exoskeleton systems and design an exoskeleton that provides support when lifting a load so that the human body is not affected by any injury during work. The design will be tested on a load of 70 kg and using different types of materials, type of control for motors and sensors. A prototype arm of the exoskeleton was made and how to transfer movement from the user to the exoskeleton was studied by studying several sensors, but a flex sensor was chosen to transmit movement, but we noticed that there were several problems during work, including that the sensor was poorly made and did not give correct readings, so we resorted to using potentiometer.
Assessment and Potential of using Passivated Emitter and rear cell (PERC) in Palestine
Energy sources in the Palestinian territories are very limited and depend on importing different types of fuel from neighboring countries, And the Israeli occupation, therefor is a need for renewable energy such as solar energy. Solar energy is one of the most important sources of clean renewable energy at present, which contributes to saving money and effort. Solar energy is absorbed and collected by solar panels. Several types of solar panels are currently available, and solar panels are constantly being developed to obtain maximum solar energy, reduced maintenance, and a longer endurance period. PERC has a global influence on both power generation and greenhouse gas emissions reduction since photovoltaic (PV) is on pace to become the dominant power generation technology. PV Green House Gases reduction will reach roughly 5% in 2022, including 2% of PERCs, assuming a 25% annual growth rate of PV installations. The main objective of this work is to experimentally investigate the behavior of the PERC unit and compare it with the performance of the POLY unit under the influence of the Palestinian climate. The temperature of the two solar panels differed, and that of PERC was lower than that of POLY, due to the fact that the PERC panel has a heat-reflecting layer and thus increasing the efficiency of the PERC panel. The efficiency of the panels was calculated at the same value of solar radiation, where it was found that the efficiency of PERC is higher at the same value of solar radiation, in fact, the solar radiation absorbed in the PERC panel is greater because of the reflective layer that enables the PERC cell to benefit from the solar radiation as much as possible and, with the increase in radiation solar energy, the energy produced increases. PERC panels produced more power per unit area than the poly panel
Palm oil used in the production of biofuels and the feed industry
The aim of this project, to recycle the wasted palm oil then used it in the field of produce animal feed. At first, tests were conducted for a sample of pure palm oil, as well as for a sample of used palm oil, and then the results of the tests were compared. Where the focus was on three tests, the moisture test, the peroxide value test, and the FFA test. Where it was found that the results are close with small variations, and they are within the permissible limit for its inclusion in feed production, so the focus was on how to change the solid phase to liquid, by reducing the melting temperature of this oil. Because of the lack of research on reducing the melting temperature, work was done to reduce it through experimentation, by adding H2O2 substances during the distillation process, and then conducting a laboratory test again in order to ensure that the properties were not affected by the treatment process and that the oil is still suitable for use in the production of feed.
Design and manufacturing Sheep feeding machine
The aim of this project is to design and fabricate pellet feed machine for goat animal that can be used in households. The machine consists of major parts such as hopper, chamber, two rollers, plate die, transmission system, and machine frame. The machine was driven using 1hp electric motor. The machine operates using roller compression mechanism to force the feed material mixture (Barley, bran, wheat, salt and corn) out of the plate die holes. As the rollers rotate on the plate die surface, a compression pressure is created on the feed material mixture particles to fill the plate die holes and come out as solid cylindrical shape pellet with specific diameter and length according the type of feeding animal. The machine design has over all dimensions of 400mm width by 600 mm length and 1200mm height. It can produce feed pellet of 8mm in diameter and 7mm long and 0.15gram weight. The machine capacity was design to produce 50 kg/hr of feed pellet production. Since the full-scale model was very expensive for fabricated, a prototype model was fabricated at AL-Galboni company in Jenin city. The company allow the project team to use the manufacturing machines such as drilling, folding, welding, bending, turning, and CNC machine to fabricate the prototype model for free cost. The fabrication of the machine parts is described briefly in chapter five. The machine operates but still need calibration for the percentage of the feed material mixture to produce the required size of the solid cylindrical shape feed pellet.
I An-Najah National University Faculty of Engineering Energy and Environmental Engineering Department Techno-economic assessment of on-grid solar PV system in Palestine: A case study in Jerusalem
Palestine has witnessed a great spread in the adaptation of photovoltaic power systems, as it has become an alternative source of energy provider for various applications, due to the low prices of photovoltaic energy. The Palestinian territories are supplied with electricity from neighboring countries, which increases and burdens the Palestinian economy in terms of security in particular. This project presents a 12-month economic and technical evaluation for the year 2021 for an already existing photovoltaic system project located on the rooftop of the Siniora factory building for food products in Jerusalem, connected to the grid with a capacity of 117 KW. The evaluation was carried out by comparing the technical and economic results of the simulated data through the PVsyst program with the real data acquired from the system real outputs, the performance ratio and the present value of the simulated photovoltaic system were 82% and $133,904, respectively, in contrast. The real data was 62% and $111,614 respectively. The main reason for the clear difference between the data is the losses that the PVsyst program does not take precisely because it works on the standard conditions, in contrast to the real data, which takes into account all conditions, including temperatures, solar radiation, and others.