INVESTIGATION ON THE OPTIMAL HEAT REJECTION PRESSURE OF CO2 TRANSCRITICAL EXPANDER CYCLE

摘要：

There is an optimal heat rejection pressure existing in the CO2 transcritical refrigeration cycle which gives a maximum COP. Whereas, the optimal heat rejection pressure in the expander cycle is different from that of in the throttle valve cycle. The optimal heat rejection pressure in the CO2 expander cycle mainly depends on the compressor efficiency, expander efficiency, the outlet temperature of the gas cooler and the evaporation temperature, etc. When the compressor and the expander efficiencies are given, the optimal heat rejection pressure in the CO2 throttle valve cycle is greater than that of in the expander cycle. In order to calculate conveniently, the values of the optimal heat rejection pressure in the expander cycle are regressed, and a calculation correlation is obtained.

作者: Junlan YANG Yitai MA Minxia LI Xianyang ZENG

作者单位: Thermal Energy Research Institute, Tianjin University,Tianjin, 300072, People’s Republic of China;De Thermal Energy Research Institute, Tianjin University,Tianjin, 300072, People’s Republic of China

会议类型: 国际会议

会议名称: The 22nd International Congress of Refrigeration(第22届国际制冷大会)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-21（万方平台首次上网日期，不代表论文的发表时间）