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Hour by Hour Simulation of Solar Hydrogen Energy System in Conjunction with Renewable Energy Sources

A renewable hydrogen energy system, consisting of a PV array, wind turbine, electrolyzer, hydrogen storage, fuel cell and a battery bank is analyzed. Its performance is simulated within one year using real meteorological hourly data for solar insolation and wind speed. Three different load profiles are analyzed, namely constant load, daily cyclic load and daily cyclic load superimposed on seasonal variations. Simulation is used to compare two different control strategies for turning on and off the electrolyzer and the fuel cell, namely (i) electrolyzer is turned on whenever there is an excess of renewable power available, and the fuel cell is turned on whenever power from renewable energy is not sufficient to satisfy the load. ; (ii) battery state of charge is used as a trigger for both electrolyzer and fuel cell turning on and off. The conclusion is that there is no universally better control strategy - while the first strategy results in better energy utilization the second strategy results in fewer electrolyzer and fuel cell turning on and off.

Simulation; Solar Hydrogen Energy; Control strategy; electrolyzer; fuel cell

Rad B1504