Effect of mixing chamber diameter on performance of transcritical CO<sub>2</sub> heat pump system with ejector

WEI Jin; TANG Liming; QI Haiming; CHEN Qi; CHEN Guangming

doi:10.11949/j.issn.0438-1157.20151268

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Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector

更新时间：2025-12-10

- Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector
- CIESC Journal Issue 5, Pages: 1719-1724(2016)
- 作者机构：
  
  浙江大学制冷与低温研究所,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151268
  CLC： B61
- Online First：05 May 2016，
  
  Published：05 May 2016
- 稿件说明：
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WEI Jin, TANG Liming, QI Haiming, et al. Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector[J]. CIESC Journal, 2016, (5): 1719-1724. DOI: 10.11949/j.issn.0438-1157.20151268.
DOI：

WEI Jin, TANG Liming, QI Haiming, et al. Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector[J]. CIESC Journal, 2016, (5): 1719-1724. DOI: 10.11949/j.issn.0438-1157.20151268. DOI：

摘要

通过在跨临界CO2系统中引入喷射器是回收系统节流损失的有效手段。实验研究了混合室直径分别为1.2、1.4、1.6 mm时

对带喷射器的跨临界CO2热泵整体性能以及喷射器自身性能的影响。整个实验中热水进口温度、蒸发温度不变

热水出口温度作为比较基准

在实验中为变量。结果表明

混合室直径对压缩机排气温度影响较小

而其对压缩机排气压力影响较大

当混合室直径为1.6 mm时

压缩机排气压力最小;当混合室直径为1.6 mm时

系统制热系数最高。

Abstract

The use of ejectors is one of the most promising methods to recover the throttling loss of transcritical CO2 heat pump systems. Experimental investigation on the effect of mixing chamber diameter on the performance of transcritical CO2 heat pump system with ejector was carried out. The mixing chamber diameter was 1.2

1.4 and 1.6 mm

respectively. The hot water inlet temperature

as well as the evaporating temperature was kept constant in all experiments. Hot water outlet temperature as a variable was chosen to be the comparison reference of the experiments. The results showed that the effect of the mixing chamber diameter on the compressor exhaust temperature was relatively small. However

the diameter has a significant effect on the compressor exhaust pressure. The system with 1.6 mm mixing chamber diameter had the lowest compressor exhaust pressure and the highest heating coefficient of performance (COP). Moreover

for the performance of the ejector

the mixing chamber diameter had a greater effect on the entrainment ratio than the pressure lift ratio.

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Effect of mixing chamber diameter on performance of transcritical CO2 heat pump system with ejector

DOI：10.11949/j.issn.0438-1157.20151268

摘要

Abstract

关键词

Keywords

references

Effect of mixing chamber diameter on performance of transcritical CO₂ heat pump system with ejector