Experiment on Performance of Transcritical CO<sub>2</sub> Heat Pump  Water Heater System with Ejector

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Experiment on Performance of Transcritical CO₂ Heat Pump Water Heater System with Ejector

更新时间：2025-07-09

- Experiment on Performance of Transcritical CO₂ Heat Pump Water Heater System with Ejector
- Vol. 43, Issue 11, Pages: 51-55(2009)
- 作者机构：
  
  浙江大学制冷与低温研究所,杭州,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB61
- Online First：10 November 2009，
  
  Published：2009
- 稿件说明：
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Experiment on Performance of Transcritical CO₂ Heat Pump Water Heater System with Ejector[J]. 2009, 43(11): 51-55.
DOI：

Experiment on Performance of Transcritical CO₂ Heat Pump Water Heater System with Ejector[J]. 2009, 43(11): 51-55. DOI：

摘要

设计了一套带喷射器的跨临界CO

热泵热水器系统实验平台

开发了相应的计算机测控系统.进行了改变冷却水体积流量和进口温度对系统性能影响的实验研究

分析了制热系数、制热量、压比、喷射系数、升压比、喷射器效率等参数的变化趋势.实验结果表明:随着冷却水体积流量减小或进口温度增加

喷射系数增加的同时

升压比也增加

而喷射器效率却降低; 在测试工况范围内喷射器效率最高达到34%

升压比最高达到1.165; 在蒸发温度为-5 ℃时

制热系数达到3左右.带喷射器的跨临界CO

热泵热水器循环的压缩机压比与传统循环相比减少了12%～14%

喷射器的引入有效地提高了跨临界CO

热泵热水器循环的效率.

Abstract

An experimental water heater system using a transcritical CO

heat pump with an ejector was designed

and a measurement and control system was developed. Experiments were conducted to assess the effects of cooling water flow rate and inlet temperature on the system performance. The changes of the heating coefficient of performance(C

)

heating capacity

pressure ratio

entrainment ratio

pressure lift were and ejector efficiency were analyzed. The experimental results show that the entrainment ratio and the pressure lift were increased while the ejector efficiency was decreased with the decrease in the cooling water flow rate or the increase in the inlet temperature. Under the experimental working conditions

the ejector efficiency was up to 34%

and the pressure lift was up to 1.165. The C

rea

ched about 3.0 when the evaporation temperature was -5 ℃. Compared with that of a conventional system with an expansion valve

the pressure ratio of the compressor in the present water heater system is decreased by 12%-14%. It appears that the ejector can improve the system performance of transcritical CO

heat pump water heaters effectively.

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Keywords

references

KIM M H, PETTERSEN J, BULLARD C W. Fundamental process and system design issues in CO2 vapor compression systems [J]. Progress in Energy and Combustion Science, 2004, 30:119-174.

ELBEL S W, HRNJAK P S. Ejector refrigeration: an overview of historical and present developments with an emphasis on air conditioning applications [C/CD]∥Proceedings of the 12th International Refrigeration and Air Conditioning Conference. West Lafayette, Indiana, USA: ARI, 2008:Refrigeration 2350.

ELBELS W,HRNJAK P S. Experimental validation and design study of a trans-critical CO2 prototype ejector system [C]∥Proceedings of the 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids. Trondheim, Norway: IIR,2006:172-175.

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MA Yitai, GUAN Haiqing, YANG Junlan, et al. CO2 trancritical compression/ejection hybrid refrigeration cycle with two evaporators [J]. Acta Energiae Solaris Sinica, 2006, 27(1): 73-77.

刘军朴,陈江平,陈芝久. 跨临界二氧化碳蒸汽压缩/喷射制冷循环[J].上海交通大学学报,2004, 38(2): 273-275.

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刘爽. 用于CO2热泵热水器的喷射器特性研究[D].杭州: 浙江大学机械与能源学院,2008.

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Experiment on Performance of Transcritical CO2 Heat Pump Water Heater System with Ejector

DOI：

摘要

Abstract

关键词

Keywords

references

Experiment on Performance of Transcritical CO₂ Heat Pump Water Heater System with Ejector