Design of a hydrogen fuel cell system for underwater power supply
Considering the special environment of underwater confinement and high pressure,a 2 kW hydrogen fuel cell system adapted to the underwater power supply was designed,which includes a hydrogen supply system,an oxygen supply system,a cooling circulation system,a humidification system and an exhaust gas recycling system.The simulation model of the hydrogen fuel cell was established by MATLAB/Simulink.The parameters of each system were calculated,and the effects of temperature,gas pressure and membrane water content on the performance of the hydrogen fuel cell were analyzed.The results show that the hydrogen fuel cell system can be normally operated at the minimum volume flow rates of hydrogen of 24.7 L/min and oxygen of 11.9 L/min,the minimum mass flow rates of hydrogen humidification of 3.6 g/min and oxygen humidification of 1.75 g/min,and the minimum volume flow rate of cooling water of 3.152 L/min.The output voltage increases with temperatures increasing when the temperatures vary in the range of 313-353 K.The output voltage increases with gas pressures increasing when the gas pressures vary in the range of 0.10-0.25 MPa.The output voltage increases with membrane water content increasing when the membrane water content varies in the range of 7-22.The model can truly reflect the working characteristics of hydrogen fuel cell.
underwater power supplyhydrogen fuel celloverall system structureSimulink simulation
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