Modeling and Simulation of PEMFC Supply System with Oxygen and Air Mixing

With the growing energy crisis and environmental problems in recent years, the green energy technology represented by fuel cell technology has been developing rapidly. Since air contains a large amount of nitrogen that does not participate in the reaction, the circulation of nitrogen in the cathode gas supply system will increase the power consumption of the air compressor, resulting in a lower net power output of the fuel cell system. In order to improve the output performance of the fuel cell system, a new fuel cell cathode gas supply system with oxygen and air mixing is proposed in this paper, and the research results show that this topology can effectively increase the output power of the stack and reduce the power consumption of the air compressor, which can eventually increase the net power of the system to more than 10%. This study provides an effective theoretical guide for the design of fuel cell system and the optimal matching of cathode gas supply system.