Experimental study on CO 2 air source heat pump water heater

被引：2
|
作者：
Chen Q. [1 ]
Tong Y. [1 ]
Zhu Z.-J. [1 ]
Tang L.-M. [1 ]
Chen G.-M. [1 ]
Li J.-J. [2 ]
机构：
[1] Institute of Refrigeration and Cryogenics, Zhejiang University
[2] Zhejiang Dunan Artificial Environment Limited Company
来源：
Chen, G.-M. (gmchen@zju.edu.cn) | 1600年 / Zhejiang University卷 / 46期
关键词：
Air source heat pump; System performance; Transcritical cycle;
D O I：
10.3785/j.issn.1008-973X.2012.04.006
中图分类号：
学科分类号：
摘要：
A prototype of heat pump was developed in order to analyze the effects of outside factors on transcritical CO 2 heat pump system performance. The system performance was investigated by changing volume flow rate or inlet temperature of cooling water, and ambient temperature. Trends of systematic parameters such as CO 2 mass flow rate, pressure ratio, heating capacity and heating coefficient of performance (COP h) were analyzed. The effects of compressor isentropic efficiency and heat transfer effectiveness of gas cooler on COP h were considered. The experimental results for the test conditions showed that CO 2 mass flow rate, pressure ratio and compressor power consumption reduced, heat capacity and COP h increased when cooling water volume flow rate increased or inlet temperature decreased. When ambient temperature increased, CO 2 mass flow rate and heat capacity had an increase, pressure ratio and compressor power consumption were almost same, and COP h increased. The compressor isentropic efficiency and heat transfer effectiveness of gas cooler were two key factors to increase COP h.
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页码：610 / 615
页数：5
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