On the premise of ensuring the power efficiency,this paper designs and builds a proton ex-change membrane fuel cell(PEMFC)cogeneration system which can directly use the cooling water with waste heat for heat recovery.The dynamic response and output performance of the stack in actu-al operation,as well as the thermal and electrical efficiency of the PEMFC cogeneration system were tested.It is found that the power output of the stack is stable and the dynamic response is rapid.With the increase of the stack power,the electrical efficiency of the system decreases,while the thermal ef-ficiency and total efficiency of the system increase.The total efficiency of the cogeneration system can reach up to 85.47％,which is 38.06％higher than that of PEMFC cell,thus greatly improving the energy utilization rate.
维普
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