基于分析的内燃机排气余热ORC混合工质性能分析  

Performance Analysis of Mixtures Used in ORC for Engine Exhaust Gas Waste Heat Recovery Based on Exergy Analysis

作　　者：舒歌群[1] 高媛媛[1] 田华[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2014年第3期218-223,共6页Journal of Tianjin University：Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB707201);国家自然科学基金资助项目(51206117)

摘　　要：使用非共沸混合工质可以降低ORC系统的不可逆损失.为此,建立了内燃机排气余热ORC模型,分析了不同组分非共沸混合工质toluene/R141b在不同蒸发温度和冷凝温度下的热效率、效率和损失.分析结果表明:混合工质的效率均低于纯工质;纯toluene的热效率和效率最高.使用混合工质,一方面可以拓宽工质选择范围;另一方面,由于温度滑移,混合工质可以更好地与热源匹配,减小不可逆损失.The use of zeotropic mixtures can reduce exergy loss. This paper presents a theoretical analysis of the com-bined ICE-ORC waste heat recovery system using zeotropic mixtures. Toluene,R141b and their different mass frac-tions were chosen. Thermal efficiency,exergy efficiency and exergy loss of mixtures were calculated at different evaporation temperatures and condensation temperatures. The results show that the efficiencies of the mixtures are all lower than that of pure fluids. Toluene shows the highest thermal efficiency and exergy efficiency. Utilizing zeotropic mixtures can extend the range of choices for working fluids. Besides,because of temperature glide,heat transfer process can be a good match for zeotropic mixtures,thus reducing exergy loss.

关 键 词：有机朗肯循环 混合工质 分析 ORGANIC Rankine cycle(ORC) 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]