二甲醚作为中高温热泵工质的性能分析  

Performance analysis of dimethylether as working fluid of medium-high temperature heat pump

作　　者：关西文[1] 刘学武 龚丽[3] 张进疆[3] 陈国华[1,2] 

机构地区：[1]香港科技大学霍英东研究院 [2]广州市香港科大霍英东研究院 [3]广东省农业机械研究所

出　　处：《制冷与空调》2013年第5期31-34,共4页Refrigeration and Air-Conditioning

基　　金：广东省省部产学研结合项目(2011B090400355;2012B091100351)

摘　　要：对二甲醚(DME)作为中高温热泵工质的热工性能进行计算与分析,与传统热泵工质R22,R134a及自然工质R600a进行对比,并对变工况(冷凝温度75～95℃,固定循环温升45℃)进行理论计算。计算结果表明,DME制热性能参数与R134a接近,但COP值高于R134a,单位容积制热量在高温工况下具有更出色的性能。而且DME的GWP与ODP值均接近零,可作为绿色环保替代工质直接充注至R134a热泵系统,并可应用于中高温环境。The thermal performance of dimethylether （DME） is analyzed and compared with R22, R134a and R600a. The theoretical performance calculation is done under the working condition of condensing temperature from 75 ℃ to 95 ℃, fixed temperature rise of 45 ℃. The results show that the performance of DME is close to R134a and its COP is about 12% higher than that of R134a,the unit volumetric heating capacity of DME is even more outstanding. Moreover, both ODP value and GWP value of DME are nearly zero. As a conclusion,DME can be a new kind of environmentally friendly working fluid used for medium-high temperature heat pump and it can be charged directly into the heat pump system that previously used R134a.

关 键 词：热泵 中高温 制冷剂替代 二甲醚 R22 R134A R600A 

分 类 号：TH38[机械工程—机械制造及自动化]