Performance Study and Optimization on Alternative Refrigerant R290 in R22 Low Temperature Heat Pump System

Zhang Yun; Liu Cichong; Chen Xiaoning; Li Dawei; Shi Junru; Chen Jiangping

doi:10.3969/j.issn.0253-4339.2019.03.072

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Performance Study and Optimization on Alternative Refrigerant R290 in R22 Low Temperature Heat Pump System

更新时间：2024-07-18

- Performance Study and Optimization on Alternative Refrigerant R290 in R22 Low Temperature Heat Pump System
- Journal of Refrigeration Vol. 40, Issue 3, (2019)
- 作者机构：
  
  1. 上海交通大学制冷与低温工程研究所
  2. 上海市高效冷却系统工程技术中心
  3. 浙江盾安人工环境股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2019.03.072
  CLC：
- Published：2019
- 稿件说明：
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Zhang Yun, Liu Cichong, Chen Xiaoning, et al. Performance Study and Optimization on Alternative Refrigerant R290 in R22 Low Temperature Heat Pump System[J]. Journal of Refrigeration, 2019, 40(3).
DOI：

Zhang Yun, Liu Cichong, Chen Xiaoning, et al. Performance Study and Optimization on Alternative Refrigerant R290 in R22 Low Temperature Heat Pump System[J]. Journal of Refrigeration, 2019, 40(3). DOI： 10.3969/j.issn.0253-4339.2019.03.072.

摘要

本文从实验角度研究了R22低温热泵系统中R290的替代性能，通过对比不同工况下两者的性能差异发现：直接在原系统中将R22抽出灌装R290时，系统换热量与COP均有所衰减，且在低温环境中R290系统的压缩机排气温度和排气压力均高于原R22系统。通过分析系统部件可知，上述现象出现的主要原因是R22系统压缩机排量过大、与R290系统不匹配，因此为同时满足系统的安全性要求以及提高R290在低温热泵系统中的整体性能，考虑在系统中更换与R290更为匹配的排量更小的压缩机。实验结果表明：对R290低温热泵系统压缩机排量进行优化能有效降低系统的排气温度和压力、提高系统整体性能；压缩机优化后的R290低温热泵系统COP较原R22系统提高6.5%，低温环境下排气温度降低36%，至80 ℃以下。

Abstract

This study addresses the experimental performance of the alternative refrigerant R290 in the R22 low-temperature heat pump system. Results show that when R22 was directly replaced by R290 in the original system

both the heat exchange and coefficient of performance (COP) of the system decreased

and the exhaust temperature and pressure of the R290 system were higher than those of the original R22 system at low temperatures. Through the analysis of the system components

reducing the displacement of the compressor of the R290 heat pump system can effectively improve overall performance and reduce the discharge temperature and pressure. After the optimization of the compressor

the R290 system achieved a 6.5% higher COP compared to the original R22 system

and the exhaust temperature was decreased to 80 °C

which is 36% lower than the R22 system.

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Related Institution

Technical Institute of Physics and Chemistry, CAS

University of Chinese Academy of Sciences

Institute of Refrigeration and Cryogenics， University of Shanghai for Science and Technology

Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering

Zhejiang Zhongguang Electrical Co.， Ltd.

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