Egypt is bordered by coastal sea2450 km, while incident solar radiation is in the order of magnitudes of 1900-2200 W/m2 in that area of the world. The present work is aimed to assess the hydrogen production from the solar-hydrogen system composed of photovoltaic cell motivated by solar energy and supplies electricity to alkali electrolyzer. The electrolyzer uses sea and Nile water as electrolytes. Indoor tests are done to identify the optimum concentration ratio of the sea water to produce hydrogen. Experimental results showed that stand-alone sea water gives a higher production rate. The results of the outdoor tests revealed the need for about seven units of electrolyzer working with the sea water to produce the same amount of hydrogen that KOH solution electrolyte would provide. However, the efficiency of solar-hydrogen units working with the sea water gives a lower constant efficiency of about 0.13%, followed by Photovoltaic/electrolyzer unit using Nile water of approximately 0.005%. The KOH solution electrolyte provides an efficiency of approximately 8% at solar noon. The sea water is recommended to be used instead of KOH solution in all coming electrolyzers.
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机译：埃及被2450公里的沿海海所包围，而在该地区，入射太阳辐射的数量级为1900-2200 W / m2。本工作旨在评估由太阳能驱动的光伏电池组成的太阳能-氢系统产生的氢，并将其提供给碱性电解槽。该电解槽使用海水和尼罗河水作为电解质。进行了室内测试，以确定产生氢气的海水的最佳浓度比。实验结果表明，单机海水具有较高的生产率。室外测试的结果表明，大约需要7台电解器与海水一起工作，以产生与KOH溶液电解质所能提供的氢相同数量的氢。但是，与海水一起工作的太阳能氢装置的效率较低，恒定效率约为0.13％，其次是使用尼罗河水的光伏/电解装置的0.005％左右。 KOH溶液电解质在太阳正午时的效率约为8％。建议在所有即将推出的电解槽中使用海水代替KOH溶液。
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