CAJ | 학술논문

为回收车用柴油机的排气余热设计了一套带回热器有机朗肯循环系统，采用纯工质R245fa作为工作介质。通过实验研究了车用柴油机变工况下排气余热的变化规律，分析了不同工况下带回热器有机朗肯循环系统的运行性能，讨论了过热度对带回热器有机朗肯循环系统运行性能的影响。针对车用柴油机-有机朗肯循环联合系统提出了余热回收效率、发动机热效率提升率、单位工质输出能量密度3个评价指标。研究表明，带回热器有机朗肯循环系统的净输出功率、余热回收效率、发动机热效率提升率最大分别可以达到43.74 kW、14.93%、13.58%。
위회수차용시유궤적배기여열설계료일투대회열기유궤랑긍순배계통，채용순공질R245fa작위공작개질。통과실험연구료차용시유궤변공황하배기여열적변화규률，분석료불동공황하대회열기유궤랑긍순배계통적운행성능，토론료과열도대대회열기유궤랑긍순배계통운행성능적영향。침대차용시유궤-유궤랑긍순배연합계통제출료여열회수효솔、발동궤열효솔제승솔、단위공질수출능량밀도3개평개지표。연구표명，대회열기유궤랑긍순배계통적정수출공솔、여열회수효솔、발동궤열효솔제승솔최대분별가이체도43.74 kW、14.93%、13.58%。
An organic Rankine cycle system with recuperator was designed for recycling waste heat of a vehicle diesel engine and R245fa was used as working medium. The change of waste heat from vehicle diesel engine under variable working conditions was studied. The operating performance of the organic Rankine cycle system with recuperator was analyzed under variable working conditions and the influence of degree of superheat on the organic Rankine cycle system with recuperator was discussed. Three evaluation indices, waste heat recovery efficiency (WHRE), engine thermal efficiency increasing ratio (ETEIR) and output energy density of working fluid (OEDWF) were presented for the vehicle diesel engine-organic Rankine cycle combined system. The net power output, WHRE and ETEIR could reach maximum values of 43.74 kW, 14.93%and 13.58%.