Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling

Dai Baomin; Yang Peifang; Liu Shengchun; Zhao Ruirui; Cao Yu; Zhao Lin; Li Chengzhan; Zhao Dongpeng; Xiao Peng

doi:10.3969/j.issn.0253-4339.2024.04.043

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Performance Analysis of CO₂ Heat Pump System Based on Ejector and Integrated Mechanical Subcooling

Refrigerant Substitution Technology | 更新时间：2024-09-02

- Performance Analysis of CO₂ Heat Pump System Based on Ejector and Integrated Mechanical Subcooling
- Journal of Refrigeration Vol. 45, Issue 4, Pages: 43-50(2024)
- 作者机构：
  
  1..天津商业大学天津市制冷技术重点实验室　天津　 300134
  2..中国汽车工程研究院股份有限公司博士后科研工作站　重庆　 401122
  3..天津大学机械工程学院　天津　 300350
  4..天津市丹华宏业制冷技术有限公司　天津　 300131
- 作者简介：
  
  Liu Shengchun, male, professor, School of Mechanical Enginee-ring, Tianjin University of Commerce, 86-13920682426, E-mail: liushch@tjcu.edu.cn. Research fields: replacement of natural working medium, energy saving and optimization of refrigeration system.
- 基金信息：
  
  the National Key Research and Development Program of China(2021YFE0116100);the National Natural Science Foundation of China(51806151)
- DOI：10.3969/j.issn.0253-4339.2024.04.043
  CLC： TB61⁺1;TK11⁺4
- Received：30 March 2024，
  
  Revised：09 May 2024，
  
  Accepted：14 May 2024，
  
  Published：16 August 2024
- 稿件说明：
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Dai Baomin, Yang Peifang, Liu Shengchun, et al. Performance Analysis of CO₂ Heat Pump System Based on Ejector and Integrated Mechanical Subcooling[J]. Journal of refrigeration, 2024, 45(4): 43-50.
DOI：

Dai Baomin, Yang Peifang, Liu Shengchun, et al. Performance Analysis of CO₂ Heat Pump System Based on Ejector and Integrated Mechanical Subcooling[J]. Journal of refrigeration, 2024, 45(4): 43-50. DOI： 10.3969/j.issn.0253-4339.2024.04.043.

摘要

为减少温室气体的排放并提升供暖系统性能，提出了基于引射器与集成机械过冷的跨临界CO

热泵供暖系统（EJ-IMS），并构建热力学模型，以系统COP为目标函数，对过冷度和排气压力进行优化，并对系统在不同气候区典型城市使用的冬季供暖性能进行评估。结果表明：EJ-IMS系统存在最大COP、最优过冷度和排气压力。EJ-IMS系统的最优过冷度比集成机械过冷系统（IMS）低26.44%~39.21%，最优排气压力比基本系统（BASE）和带引射器系统（EJ）低0.27%~9.37%。相比3种常规系统，EJ-IMS系统的COP和效率分别提高6.09%~37.74%和6.75%~46.02%。EJ-IMS系统的供暖性能系数（HSPF）相对3种系统提高6.89%~29.61%，其更适用于严寒地区。可为高效CO

供暖系统的构建提供理论参考。

Abstract

To reduce greenhouse gas emissions and improve the performance of space heating systems

a transcritical CO

heat-pump heating system using an ejector and integrated mechanical subcooling (EJ-IMS) is proposed. A thermodynamic model of the system is developed with the coefficient of performance (COP) as the objective function

and the subcooling degree and discharge pressur

e are optimized. The winter heating performance of the system located in cities located in different climate zones was evaluated. The results show that the EJ-IMS system has a maximum COP

corresponding to the optimum subcooling degree and the optimum discharge pressure. The optimum subcooling degree is 26.44%-39.21% lower than that of the integrated mechanical subcooling system

and the optimum discharge pressure of the EJ-IMS system is 0.27%-9.37% lower than that of the baseline system and ejector system. The COP and exergetic efficiency of the EJ-IMS system are 6.09%-37.74% and 6.75%-46.02% higher than those of the three conventional systems

respectively. The heating seasonal performance factor of the EJ-IMS system is 6.89%-29.61% higher than those of the three systems

indicating that the EJ-IMS system is suitable in cold regions. This study provides a theoretical reference for the construction of efficient CO

space-heating systems.

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Performance Analysis of CO2 Heat Pump System Based on Ejector and Integrated Mechanical Subcooling

DOI：10.3969/j.issn.0253-4339.2024.04.043

摘要

Abstract

关键词

Keywords

references

Performance Analysis of CO₂ Heat Pump System Based on Ejector and Integrated Mechanical Subcooling