Author(s): SUN Zhi-Li, LI Min-Xia, MA Yi-Tai, WANG Huan, YU Wen-Fang, GONG Xiu-Feng, Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, MOE, School of Mechanical Engineering, Tianjin University
Pages: 1484-1487
Year: 2014 Issue:  8
Journal: Journal of Engineering Thermophysics
Keyword:  CO 2 water-water heat pump; R32; additive;
Abstract: The performance of the transcritical CO₂ cycle that adds R32 additive from 1%to 5%was investigated.The results show that when the proportion of R32 additive is 5%.the compression ratio increases greatly;when adds R32 additive,the input power of compressor decreases;the COPh is increases greatly in part operating condition,when the proportion of R32 additive is 4%and the evaporation temperature is 0℃,the COP_h is 4.43,the COPh improve 4%compared with pure CO₂;when the proportion of R32 additive is 4%,the COP_C reaches the maximum;when the proportion of R32 additive is 4%and the evaporation temperature is 0℃,the COP_C is 3.87,the COP_C improve7%compared with pure CO₂;when adds the R32 additive,the water temperature of gas cooler reduces.