固体氧化物燃料电池-吸收式制冷机混合系统性能分析

摘要

本文提出利用固体氧化物燃料电池(SOFC)释放的废热驱动吸收式制冷机的冷电联产混合系统模型.该模型基于电化学、非平衡态热力学及有限时间热力学等理论,充分考虑了系统内部各种不可逆损失,推导出混合系统的等效输出功率和效率的表达式,揭示了混合系统的一般性能特性和优化工作区间,讨论了各设计参数及工作条件对混合系统性能特性的影响.结果表明:混合系统的等效功率密度和效率相比单一的SOFC分别提升4.06％和4.08％;降低内部不可逆因子、减小了综合参数C、减少了热力学损失以及提高了SOFC工作压强可有效提升混合系统的性能.%A hybrid system model was proposed to recover the waste heat released by solid oxide fuel cell (SOFC)to drive the absorption refrigerator for both electricity and cooling production.Based on the theories of electrochemistry,non-equilibrium thermodynamics and finite time thermodynamics,the model fully considers various irreversible losses within the hybrid system and obtains the output power and efficiency of the hybrid system.It reveals the general performance characteristics and optimum operating range of the hybrid system.Finally,the influences of design parameters and working conditions on the performance characteristics of the hybrid system are discussed.The results show that,the equivalent power density and efficiency of the hybrid system are improved by 4.06％ and 4.08％ compared with that of the stand-alone SOFC.Lowering the internal irreversibility factor,the thermodynamic loss and the integrated parameter C and increasing the SOFC operating pressure may improve the performance of the hybrid system.