A NON-OZONE DEPLETING REFRIGERANT FOR MODERATELY HIGH TEMPERATURE HEAT PUMPS: HTR04
A non-ozone depleting ternary mixture of R134a/R227ea/R245fa, named HTR04 (High Temperature Refrigerant 04), for moderately high temperature heat pumps, was developed. The material compatibility and oil miscibility demonstrate that this mixture could be used with R134a compressor in an HTR04 heat pump system. HTR04 was filled in a 2.92 kW water source heat pump to study the system performance. The results show that the condenser outlet water temperature could reach and hold 82 ℃ with a high coefficient of performance; meanwhile, the condenser pressure is less than 2.2MPa. The fractionation for HTR04 was simulated and evaluated. Furthermore, the optimal match was studied between temperature glide of HTR04 and difference of water temperature in condenser. For better system performance, the experimental results suggest that the temperature difference of water in condenser should be close to the glide of HTR04.
Cheng ZAN L.SHI
Key laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University,Beijing, 100084, China
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）