Thermodynamic analysis on CO2 transcritical two-stage compression refrigerating cycle

被引：0
|
作者：
Liu, Jun-Pu [1 ]
Chen, Jiang-Ping [1 ]
Chen, Zhi-Jiu [1 ]
机构：
[1] Sch. of Mech. and Power Eng., Shanghai Jiaotong Univ., Shanghai 200030, China
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2002年 / 36卷 / 10期
关键词：
Carbon dioxide - Computer simulation - Efficiency - Thermodynamics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper analyzed the performance of CO2 transcritical two-stage compression cycle, and contrasted it with one-stage system. The results indicate that the two-stage compression cycle can increase the COP by about 5% compared with the one-stage compression system in the same condition. The optimum heat rejection pressure is 9.0 MP at certain evaporating temperature. The internal heat exchanger can improve the performance greatly below the optimum heat rejection pressure, while little above the optimum heat rejection pressure. The exhaust temperature of the two-stage system is decreased by about 18°C in the same conditions.
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页码：1393 / 1395
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