PEMFC耦合高温热泵蒸汽电力联产系统热力学分析与优化设计OA

Regarding the issue that the proton exchange membrane fuel cell(PEMFC)-based combined heat and power system is limited to supplying low-temperature heat for residential use and cannot supply high-grade thermal energy.A steam and power cogeneration system with the PEMFC-coupled high-temperature heat pump for industrial application is proposed in this paper to fully recover the waste heat from the PEMFC cooling system and cathode exhaust.The waste heat is upgraded by producing 125 ℃ steam through a steam heat pump for subsequent utilization.The system steady-state model is established by co-simulation with Aspen plus and Matlab software.The heat generation and dissipation under different operating conditions of PEMFC are analyzed,and the effects of PEMFC operating parameters on the steam production and energy efficiency of the system are investigated.The results indicate that,under the rated output power,the maximum steam production rate reaches 0.1 t/h,and the energy efficiency of the proposed system is 5％higher than that of a standalone PEMFC system.The highest energy consumption is attributed to the compressors,with the three compressors accounting for 99％of the total system energy consumption.The proposed steam and power cogeneration system can achieve efficient steam and electricity supply,and provide guidance for PEMFC industrial application.