几种中高温热泵工质的理论循环性能  

Theoretical Cycle Performances of Refrigerants and a Refrigerant Mixture for Moderate and High Temperature Heat Pumps

作　　者：马利敏[1] 王怀信[1] 郑臣明[1] 

机构地区：[1]天津大学机械工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2005年第8期689-694,共6页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(59976025).

摘　　要：寻求环境特性和循环性能俱优的中高温热泵工质,是当前中高温热泵技术研究中的关键问题之一.考虑到纯物质数量和性质的限制,以性能相对优良的新物质为组元,根据组元性能优势互补的原则,结合理论循环性能分析评价,进行了混合工质的研究,提出了一种臭氧破坏势ODP为0,温室效应势GWP较低的非共沸混合工质M1.在冷凝温度为70～100℃的热泵循环工况范围,M1的压力水平适中,有5～8℃的相变温度滑移;与传统工质CFC114和新物质HFC143、CF3I相比,M1的单位容积制热量大于CFC114、HFC143的单位容积制热量,性能系数高于CFC114、CF3I的,M1具有作为中高温热泵工质的潜力.One of the key issues in the development of moderate and high temperature heat pump technology is to find out environmentally benign working fluids with satisfactory cycle performances. Considering the limits of the number and properties of pure substances, refi＇igerant mixtures composed complementarily in properties of some new pure fluids proposed in the previous research were studied with theoretical heat pump cycle analysis.A zeotropic mixture, M 1, with 0 ozone depletion potential ODP and low global warming potential GWP, was proposed. Comparative assessment on the theoretical cycle performances of M1 and traditional fluid CFC114 as well as new fluids HFC143 and CF3I in the condensing temperature range of 70-100℃ was carried out, showing that M1 held larger specific volumetric heat capacity than CFC114 and HFC143, and better coefficient of performance values than CFC114 and CF3I, with a moderate pressure level and 5-8℃ temperature glides.Comprehensively, M1 is a prospective working fluid for moderate and high temperature heat pumps.

关 键 词：中高温热泵工况 混合工质 理论循环性能 

分 类 号：TB612[一般工业技术—制冷工程]