الفهرس 
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Abstract
In this work, an alkaline electrolysis system IS designed and constructed to produce Hydrogen (H2) using photovoltaic (PV) panels as a source of electric power. The system was experimentally installed; tested and optimized under the weather conditions of Cairo 30 oN. Moreover the system is numerically simulated and validated by experimental data.
The considered system consists of a fixed and 30° titled PV array that can feed the Hydrogen cell by required electrical power. The Hydrogen cell is a cylindrical container and is made from Acrylic material. Two electrodes are used as a cathode and anode, which are partially immersed in an alkaline solution and saline water. A direct coupling between PV and Hydrogen cell without any regulators were used.
PV modules with specifications of current, voltage, has been studied to optimize the system performance. The actual I-V curve was estimated for module to determine the field specification of PV module. It is found that PV module that has highest current is recommended to be used in the Hydrogen generation process. The current is the main responsible for dissociation of water into Hydrogen and Oxygen because of that increasing in current increases the number of electrons needed for separation.
The optimization of the electrolysis is developed; it is studied the concentration of salts KOH and saline water in distilled water, which affects the Hydrogen production. The optimum KOH concentration is ranged from 20 to 30% to get the maximum of Hydrogen production. The material, geometry, diameter of the electrodes and the temperature of the electrolyte were stUdied which may affect the Hydrogen production.
Considering the obtained optimized parameters, the system was constructed and tested. The performance of the optimal system is presented.