Simulation, analysis and optimization of a non-emission process producing power, hydrogen gas and liquid hydrogen using solar energy and PEM electrolysis

Method of power and hydrogen gas production by solar energy and water electrolysis has received attention in recent years, because hydrogen and oxygen gases are separated from water without any pollution, the mentioned method has net-zero carbon emissions, known as green hydrogen. In this study, solar cells are used to supply power for the proton exchange membrane (PEM) electrolysis and the liquefaction sections. Bandar Abbas city is selected for the proposed process. The novelties of this study are based on two points, first proposing an integrated process of solar power generation and separation and liquefaction of hydrogen gas without pollution and with higher efficiency compared to other similar cycles. The capacity of solar arrays is 6,000 kW, while the production capacity of the electrolysis section is 438 kg/h of oxygen gas and 55 kg/h of hydrogen gas. The specific energy consumption (SEC) of the liquefaction cycle is 5.07 kWh/kg. The highest rate of exergy destruction goes to the electrolysis section, followed by heat exchangers as the second rank.