Experimental Research of Transcritical CO2 Heat Pump System with Double Expansion Valve

Wang Zhe; Gong Yi; Wu Xuehong; Hou Feng

doi:10.3969/j.issn.0253-4339.2012.06.057

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Experimental Research of Transcritical CO2 Heat Pump System with Double Expansion Valve

更新时间：2024-07-18

- Experimental Research of Transcritical CO2 Heat Pump System with Double Expansion Valve
- Journal of Refrigeration Vol. 33, Issue 6, (2012)
- 作者机构：
  
  郑州轻工业学院机电工程系制冷与低温工程研究所
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2012.06.057
  CLC：
- Published：2012
- 稿件说明：
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Wang Zhe, Gong Yi, Wu Xuehong, et al. Experimental Research of Transcritical CO2 Heat Pump System with Double Expansion Valve[J]. Journal of refrigeration, 2012, 33(6).
DOI：

Wang Zhe, Gong Yi, Wu Xuehong, et al. Experimental Research of Transcritical CO2 Heat Pump System with Double Expansion Valve[J]. Journal of refrigeration, 2012, 33(6). DOI： 10.3969/j.issn.0253-4339.2012.06.057.

摘要

介绍了一种带有双节流阀和平衡储液器控制装置的跨临界CO2热泵系统实验台，针对系统相对功率影响指数和相对制冷系数影响指数进行量化分析，论证了回热器对跨临界CO2热泵系统性能的影响。结果表明：在高压侧压力为10MPa以上，蒸发温度在0℃以下时，带回热器的系统功率相对较低。而蒸发温度在5℃以上，无回热器的系统性能系数将提高3%至5%。这种新的带有双节流阀和平衡储液器控制装置可有效平衡系统高、低侧压力波动对性能的影响。研究结果为跨临界CO2热泵的开发提供了实验依据。

Abstract

A new transcritical CO2 heat pump systems with dual expansion valve and balance CO2 liquid reservoir adjustment device was introduced. The influence of the internal heat exchanger (IHX) on the system performances was analyzed on the basis of relative COP and compressor power. It is concluded that: the compressor power of system with IHX is relatively low when the high side pressure is over 10MPa

and the evaporating temperature is below 0℃. The COP of the system without IHX is about 3% to 5% higher than the system with IHX when the evaporating temperature is over 5℃. The new devices can control high and low side pressure effectively

and decrease the impact of pressure fluctuations on its COP. The experimental results provide important basis for the development of the transcritical CO2 heat pump systems.

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