Thermodynamic Comparative Analysis of Heat Pump Cycles

摘要：

The expansion process of refrigerant flow through throttling devices represents an obvious thermodynamic loss that can be mitigated by the application of different solutions, such as intracycle evaporative cooling, economizer and ejector cycles or work producing expansion devices. The present paper concentrates on studying the latter, specifically applied for the refrigeration cycles. A basic thermodynamic model was developed to simulate a vapor compression cycle for heat pump cycles using expanders. This study concentrated in the subcritical vapor compression R134a cycle with an expander and a thermostatic expansion valve placed downstream the expander. The results indicate that, even the gains on the COP are reasonable in the vapor compression cycles, at least for large expander efficiencies, but the cycle performance with an expander is much better than the cycle performance with a thermostatic expansion valve if the efficiency of the expander is up to a certain value.

关键词： Comparative analysis Ezpander Heat pump

作者: Yingbai Xie Yingfu Liu Luxiang Zong Ganglei Sun

作者单位: Department of Power Engineering,North China Electric Power University,Baoding,China

会议类型: 国际会议

会议名称: The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)

会议地点: 南京

会议语种:英文

页码: 546-550

在线出版日期: 2009-11-06（万方平台首次上网日期，不代表论文的发表时间）