R134a/R245fa对比R245fa高温热泵循环性能实验研究  

Experimental research on cyclic performance of high temperature heat pump with R134a/R245fa in comparison with R245fa

作　　者：庄绪成 郭健翔[1] 孙晋飞 赵向明[1] 包思凡 ZHUANG Xu-cheng;GUO Jian-xiang;SUN Jin-fei;ZHAO Xiang-ming;BAO Si-fan(School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266033

出　　处：《青岛理工大学学报》2020年第4期81-86,共6页Journal of Qingdao University of Technology

基　　金：中国可再生能源规模化发展项目(A3-CS-2016-007)。

摘　　要：利用螺杆式高温热泵实验台,以混合工质R134a/R245fa(质量比3∶7)和纯工质R245fa为研究对象,实验研究了两种工质在高温工况下的循环性能,并进行对比分析.结果表明,混合工质R134a/R245fa的制热量比同工况下R245fa机组高27.6%~44.3%,COP值比同工况下R245fa机组低14.3%~22.8%.当冷凝器出水温度为99.8℃时,混合工质R134a/R245fa的冷凝压力为2.12 MPa,排气温度为114.2℃,均处在机组安全范围之内.而R245fa因具有更低的冷凝压力和排气温度,可作为冷凝器更高出水温度时的热泵工质.Taking the mixed refrigerant R134a/R245fa(mass ratio 3∶7)and the pure refrigerant R245fa as the research objects and using the screw high temperature heat pumps test bench,this paper studies the cyclic performance of the two refrigerants under high temperature conditions,and the experimental data are compared and analyzed.The results show that the heating capacity of the mixed refrigerant R134a/R245fa is 27.6%to 44.3%higher than that of the pure one under the same working condition.The COP value is 14.3%to 22.8%lower than the pure one under the same working condition.When the condenser outlet temperature reaches 99.8℃,the condensation pressure of the mixed refrigerant R134a/R245fa is 2.12 MPa,and the exhaust temperature is 114.2℃,which is within the safe range of the unit.The pure refrigerant R245fa can be used as a heat pump refrigerant at a higher outlet temperature of the condenser due to its advantages in condensation pressure and exhaust temperature.

关 键 词：高温热泵 R134a/R245fa R245FA 实验研究 

分 类 号：TB657.2[一般工业技术—制冷工程]