冷凝条件对PEMFC混合工质ORC系统性能的影响  

Influence of the condensation conditions on PEMFC with ORC condenser using zeotropic fluids

作　　者：李青山 汪春梅 汪陈芳 时礼宁 诸葛伟林[2] 张扬军[2] LI Qingshan;WANG Chunmei;WANG Chenfang;SHI Lining;ZHUGE Weilin;ZHANG Yangjun(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009 [2]汽车安全与节能国家重点实验室,清华大学,北京100084

出　　处：《汽车安全与节能学报》2021年第4期551-556,共6页Journal of Automotive Safety and Energy

基　　金：安徽省自然科学基金资助项目(1908085ME137)。

摘　　要：为提高氢质子交换膜燃料电池(PEMFC)能量利用率,提出以R245fa/R123混合工质有机Rankine循环(ORC)作为冷却系统并回收PEMFC余热。使用Aspen Plus软件建立ORC混合系统模型,通过固定冷凝温度、固定冷凝压力等不同限制条件,分析了混合工质R245fa的混合质量分数对系统性能的影响。结果表明:混合比R245fa/R123=0.6/0.4的工质,在冬季工况和固定冷凝压力101.3 kPa时,余热回收率最高,分别为10.90%和11.08%;非共沸混合工质相对纯工质有较强的工况适应性,通过调整混合比,可在不同工况下充分回收PEMFC余热。An organic Rankine cycle(ORC)with R245fa/R123 zeotropic mixture as cooling system to recover the waste heat of proton exchange membrane fuel cell(PEMFC)was proposed to improve the energy utilization factor.An ORC hybrid system was established using Aspen Plus software.The influence of the mass fraction of zeotropic fluids R245fa on ORC system performance was analyzed by fixing the condensing temperature and pressure etc.The results show that R245fa/R123 with mixing ratio of 0.6/0.4 has the highest waste heat recovery at winter and 101.3 kPa at fixed condensation pressure,which are 10.90%and 11.08%,respectively.Zeotropic mixtures have better working condition adaptability than pure components.By adjusting the mixing ratio,the waste heat of PEMFC can be fully recovered under different working conditions.

关 键 词：氢燃料电池(PEMFC) 混合工质 有机Rankine循环(ORC) 冷凝条件 

分 类 号：TK115[动力工程及工程热物理—热能工程]