Study of the effect of factors on the wind-hydrogen system energy conversion

Abstract

The combination of hydrogen and wind power can effectively reduce the waste of wind resources. This study explores a novel method to study the effect of operating conditions on equipment performance and system's the electric-hydrogen-electric conversion efficiency. The effect of the electrolyzer hydrogen production and fuel cell power generation under different operating conditions are studied. Orthogonal tests and Response surface methods are used to explore the influence of various factors on the electric-hydrogen-electric conversion efficiency. The results show that raising the electrolyzer's operating temperature, the system hydrogen production efficiency increases by 1.8 %. Raising the fuel cell's operating temperature, the fuel cell exergy efficiency increases by 2.2 %. The system electric-hydrogen-electric efficiency increased by 1.4 %. Raised gas pressure improves the reactant concentration. The system's electric-hydrogen-electric efficiency increased by 1.78 %. The influence degree of various factors on the system: fuel cell operating pressure > fuel cell operating temperature > electrolyzer operating temperature. This study provides references for improving the equipment working performance and designing high-performance electrolyzers and fuel cells.