基于预热器的车载有机朗肯循环余热发电系统设计  

Design of Vehicle Organic Rankine Cycle Waste Heat Power Generation System Based on Preheater

作　　者：李新禹[1] 郝旭涛 孟林[1] 陈林[1] 

机构地区：[1]天津工业大学机械工程学院制冷供热实验室,天津300387

出　　处：《科学技术与工程》2018年第3期230-234,共5页Science Technology and Engineering

基　　金：天津市自然科学基金(C16JCZDJC31400)资助

摘　　要：优化设计并搭建了基于预热器的、可回收膨胀后高温乏汽的小型车载有机朗肯循环(ORC)余热发电系统。利用热力学第一定律和第二定律对小型车载ORC余热发电系统进行了热力学分析和能量计算。以R123为工质,热源温度为300℃,在工质流量、压力等给定的工况下,计算系统在有无预热器的情况下各设备的热效率和系统总热效率。经计算,系统在有无预热器的情况下的总热效率分别为23.1%、10.8%,蒸发器的换热量分别为7.35 k J、4.67 k J。研究结果表明:相对于没有预热器的传统ORC系统,加了预热器的ORC系统的热效率和蒸发器的换热量都有较大的提升。Optimization design and built based on recovering expansion preheater after high temperature steam exhaust small vehicular organic Rankine cycle（ ORC） waste heat power generation system,the small vehicle ORC waste heat power generation system for the thermodynamic analysis,energy analysis and energy calculation by the first and second law of thermodynamics are presented. With R123 as working medium,the heat source temperature is 300 ℃,the thermal efficiency and total thermal efficiency of the system are calculated under the given conditions of working fluid flow and so on. After calculation,the total heat efficiency of the system is 23. 1% and 10. 8%,respectively,and the heat transter of the evaporator is 7. 35 k J and 4. 67 k J respectively. The results show that compared with the traditional ORC system without preheater,the heat efficiency of the ORC system and the heat transfer coefficient of the evaporator are greatly improved.

关 键 词：小型ORC余热发电系统 热力学分析 分析 热效率 R123 

分 类 号：TK262.1[动力工程及工程热物理—动力机械及工程]