A correlation of optimal heat rejection pressures in transcritical carbon dioxide cycles

被引：399

作者：

Liao, SM ^{[1
]}

Zhao, TS ^{[1
]}

Jakobsen, A ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2000年 / 20卷 / 09期

基金：

中国国家自然科学基金;

关键词：

carbon dioxide; refrigeration; transcritical cycle;

D O I：

10.1016/S1359-4311(99)00070-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this work, a cycle simulation model has been developed to optimize the coefficient of performance (COP) of transcritical carbon dioxide air-conditioning cycles. The analysis shows that the COP of the transcritical carbon dioxide cycle varies nonmonotonically with the heat rejection pressure; a maximum COP occurs at an optimal heat rejection pressure. It is further revealed that the values of the optimal heat rejection pressure mainly depend on the outlet temperature of the gas cooler, the evaporation temperature, and the performance of the compressor. Based on the cycle simulations, correlations of the optimal heat rejection pressure in terms of appropriate parameters are obtained for specific conditions. The results are of significance for the design and control of the transcritical carbon dioxide air-conditioning and heat pump systems. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：831 / 841

页数：11

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