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Recent Graduates

1-1.pngEng. Nevin Yehia Zakaria
Nationality Egyptian 
Background B.Sc. Chemical Engineering, HTI 10th of Ramadan City, 2008
Degree Master of Science (M.Sc.)
Programme Renewable Energy Engineering
Title of Thesis Numerical Investigation Of Solar Collector Design Parameters Effect On The Collector's Performance And Cost
Summary The supply of heated water for domestic use has been one of the most successful and cost effective applications of solar energy as domestic water heating represents almost 20% of the total energy consumption of a typical dwelling unit.

The featured research discusses the optimization of a low-cost Flat Plate Solar Collector (FPSC) to be used in MENA region. The proposed model estimates the global solar radiation over Cairo, Egypt using an empirical model that divides Egypt into stations and estimates the solar radiation in hot and cold seasons depending only on the site's latitude and, elevation, consequently the absorbed solar radiation and the optimum inclination angle for a FESC are determined. Numerical models were implemented to predict the thermo-hydraulic flow behavior of a standard tube-on-sheet collector while evaluating the local lasses, friction coefficient and Nusselt number as functions of the operating parameters. These module are used to study the impact of different design parameters of the FPSC on the device cost and efficiency; tube diameter, number of tubes, absorber plate thickness, insulation thickness, and tube spacing been investigated and optimized using an objective function that consider both device's cost and performance. Another model is implemented to investigate the effect of using different type of materials for the absorber plate, absorber coating, glass type, and insulator on the collector's efficiency. Cost and performance analysis were studied and compared with another mare expensive design. A 10% reduction in efficiency was observed for the new design along with a relatively high cost reduction compared to the reference design.

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2-2.pngEng. Ibrahem M. Mahmoud
Nationality Egyptian 
Background B.Sc. Electrical Power Technology, Helwan University, 2008
Degree Master of Science (M.Sc.)
Programme Renewable Energy Engineering
Title of Thesis Experimental and Numerical Simulation Investigation for Hybrid Renewable Energy System PV/WIND
Summary Small-scale renewable energy systems are becoming increasingly popular due to soaring fuel prices and due to technological advancements which reduce the cost of manufacturing.

Solar and wind energies, among other renewable energy sources, are the most available ones globally. The hybrid photovoltaic (PV) and wind power system has a higher capability to deliver continuous power with reduced energy storage requirements and therefore results in better utilization of power conversion and control equipment than either of the individual sources. Power conditioning units (p.c.u.) for such small-scale hybrid PV-wind generation systems have been proposed in this study. In the first part of this thesis, Generic model simulations are performed using the prototype parameters and the weather data of some experimental days. The results predicted by the component developed showed similar trends as the experimental results. The predictions are, however, not within the experimental uncertainties. A numerical modelling for the hybrid system was done by using commercial simulators such as COMSOL Multiphysics, ANSYS, MATLAB and Simulink. A control system was developed for controlling and optimizing the charging and the conversion process. In the second part of the experimental work, a Double axial sun-tracking system is designed where the movement of a photovoltaic module is controlled to follow the Sun's radiation using a Data acquisition card (DAQ) unit. In addition to the above a simple electronic load circuit is presented for testing the PV modules by tracing their I-V characteristics. The circuit consists of a fast varying electronic load based on power MOSFET and operational amplifier. A data acquisition system is developed for controlling the MOSFET gate-source voltage. The circuit is designed, implemented and tested under real conditions.

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3.pngEng. Moataz Mohamed Kehella
Nationality Egyptian 
Background B.Sc. Mechanical Power, Cairo University, 1998
Degree Master of Engineering (M.Eng.)
Programme Renewable Energy Engineering
Title of Thesis Solar Photovoltaic Water Pump System Design
Summary The aim of this study is to introduce an optimum design for PV solar water pump system that can be used in different applications to satisfy human demands of water in many applications such as crops irrigation and domestic use either in remote area or inside cities.

Maximizing the dependence on available power sources has become a must due to the fact that available conventional power sources and their reserve are becoming unsustainable. Key factors affecting the sustainability of power source is power source availability and its price, accordingly finding another sustainable power source with feasible cost is crucial to be used and maximized in wide range of applications. Due to the huge increase in both energy consumption and insatiability in fossil fuel prices, it is more than essential to focus on renewable energy and produce power from other alternatives that have clean and renewable nature. As each country has limited share of water, limited power sources and availing water for any domestic or industrial use is becoming very difficult, this is becoming main concern of each one all over the world. Water has to be either lifted and pumped or pumped only to end users which certainly need power source. Accordingly the use of renewable energy sources -Solar Energy- in pumping liquids especially water in irrigation process or livestock which has to be effectively spread and availed in a wind range in the next decades due to the bad need for using these sources as they will be the state of the art technological challenges that must be utilized as much as possible in different applications.

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4.pngEng. Mohamed Khaled El Bourini
Nationality Egyptian 
Background B.Sc. Mechanical Engineering, The British University in Egypt, 2010
Degree Master of Engineering (M.Eng.)
Programme Advanced Materials Science and Engineering
Title of Thesis Effect of Intercritical Annealing on Corrosion and Mechanical Properties of Weathering Steel
Summary This Paper discusses the effect of intercritical annealing on both mechanical properties and corrosion resistance of weathering steel.

Critical annealing is done at 750, 770 and 790 oC on the weathering steel DIN 50049-3.1.B and the tensile testing and hardness test are done for each temperature and the as received ones. The corrosion properties are then done using polarization test, humidity test and to see the effectiveness of weathering steel in use in marine applications, either in fresh or salt water mediums.

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