内燃机与配件www.nrjpj.cn■■■■■■■■■■■■■■设计研究基于朗肯循环的发动机余热回收系统数值模拟吕宇航,吴志军,邓俊,冀蒙(同济大学汽车学院,上海201804)摘要:基于发动机排气余热回收系统,在GT-Power中搭建朗肯循环模型,根据仿真结果挑选最优工质,分析不同发动机工况下余热回收系统的热效率和输出功率等特性。结果表明:对比R245fa、R1234ze、水三种工质,选择R1234ze作为最优工质对不同排气工况进行仿真。在低功率运转工况下,排气能量较低,膨胀机输出功率较低,达不到回收利用的价值。在中高功率运转工况下,排气能量显著增加,膨胀机输出功率可达11kW,具有较高的回收利用价值。关键词:发动机;余热回收;朗肯循环;仿真分析中图分类号:TK413.4+4文献标识码:A文章编号:1674-957X(2023)01-0001-04NumericalSimulationofEngineWasteHeatRecoverySystemBasedonRankineCycleLüYu-hang,WuZhi-jun,DengJun,JiMeng(SchoolofAutomotiveStudies,TongjiUniversity,Shanghai201804,China)Abstract:Basedonengineexhaustwasteheatrecoverysystem,andtheRankinecyclemodelisbuiltinGTpower.Theoptimalworkingmediumwereselectedaccordingtothesimulationresults,andthethermalefficien-cyandoutputpowerofthewasteheatrecoverysystemunderdifferentengineconditionswereanalyzed.There-sultsshowthatcomparedwithR245fa,R1234zeandwater,R1234zeisselectedastheoptimalworkingmediumtosimulatedifferentexhaustconditionsaccordingtothesimulationresults.Indifferentexhaust...