Performance of transcritical CO2 combined cooling and heating system with split flow cooling

被引：0

作者：

Wang L. ^{[1
]}

Zhang X. ^{[1
]}

机构：

[1] College of Engineering, Peking University, Beijing

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 01期

关键词：

Carbon dioxide; Combined cooling and heating; Performance analysis; Split flow cooling; Transcritical system;

D O I：

10.16085/j.issn.1000-6613.2021-0149

中图分类号：

学科分类号：

摘要：

In order to explore the ways realizing subcooling in transcritical CO2 combined cooling and heating system without external assistance, three types of transcritical system with split flow cooling were proposed, and the thermodynamic model of the systems were established. The system performance changes under different working conditions were analyzed by simulation calculation. The results showed that the system scheme of split flow between evaporator and throttle valve could not improve the system performance. The split flow between the gas cooler and the subcooler, and the split flow between the subcooler and the throttle valve had the same effect on improving system performance, and comprehensive COP(coefficient of performance) can be increased by 17.62%. The use of split flow cooling will increase the suction pressure of the compressor. When the temperature of CO2 at the outlet of the gas cooler was determined, there was an optimal discharge pressure to maximize the comprehensive COP. A reasonable scheme of split flow cooling system could be used as an effective means to realize CO2 subcooling in transcritical system and improve system performance only by self-circulation. © 2022, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：60 / 66

页数：6

共 16 条

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