Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO<sub>2</sub> Heat Pump Air Conditioning Systems for Trains

Xie Hongsheng; Bai Gang; Yang Mengying; Song Yulong; Cao Feng

doi:10.12465/j.issn.0253-4339.2025.04.036

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Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO₂ Heat Pump Air Conditioning Systems for Trains

更新时间：2025-08-28

- Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO₂ Heat Pump Air Conditioning Systems for Trains
- Journal of Refrigeration Vol. 46, Issue 4, Pages: 36-43(2025)
- 作者机构：
  
  1.西安交通大学能源与动力工程学院　西安　710049
  2.中车大连机车研究所有限公司　大连　116000
- 作者简介：
  
  Song Yulong, male, associate professor, School of Energy and Power Engineering, Xi'an Jiaotong University, 86-13488264214, E-mail: yulong.song@mail.xjtu.edu.cn. Research fields: new energy vehicle heat pump air conditioning and thermal management technology, transcritical CO2 refrigeration and heating technology.
- 基金信息：
  
  National Natural Science Foundation of China(52006161)
- DOI：10.12465/j.issn.0253-4339.2025.04.036
  CLC： TB61⁺1;TK172
- Received：01 March 2024，
  
  Revised：25 July 2024，
  
  Accepted：01 August 2024，
  
  Published：16 August 2025
- 稿件说明：
移动端阅览
Xie Hongsheng, Bai Gang, Yang Mengying, et al. Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO₂ Heat Pump Air Conditioning Systems for Trains[J]. Journal of refrigeration, 2025, 46(4): 36-43.
DOI：

Xie Hongsheng, Bai Gang, Yang Mengying, et al. Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO₂ Heat Pump Air Conditioning Systems for Trains[J]. Journal of refrigeration, 2025, 46(4): 36-43. DOI： 10.12465/j.issn.0253-4339.2025.04.036.

摘要

为研究高速动车上跨临界CO

热泵空调系统中换热器结构对系统性能、整体功耗的影响，以达到提升性能、减少功耗的目的，基于AMEsim仿真平台搭建了数值仿真模型。结果表明：在高速动车热泵空调系统中，气体冷却器结构对系统性能的影响大于蒸发器结构对系统性能的影响；而在换热器的结构选择上，制冷模式下室外换热器采用逆流、室内换热器采用顺流（对应制热模式下采用室外换热器顺流，室内换热器逆流）的结构为最优结构，其在额定制冷工况35 ℃下，比室外换热器顺流布置时的COP提升20.38%，额定制热工况7 ℃下，比室内换热器顺流布置时的COP提升68.04%。综合考虑逆流程度和风机功耗，在“充分换热状态”，系统COP会随着逆流程度的增大而升高，在“风量过小状态”，系统COP会随着逆流程度的增大而减小。

Abstract

To further study the influence of heat exchanger structures on system performance and overall power consumption in transcritical CO

heat pump air conditioning systems for high-speed trains to improve performance and reduce power consumption

this study builds a numerical simulation model based on the AMEsim simulation platform. The simulation results show that

in the high-speed train heat pump air conditioning system

the influence of the gas cooler structure on system performance is greater than that of the evaporator structure. In terms of the selection of heat exc

hanger structure

the optimal structure is that during refrigeration

the outdoor heat exchanger adopts the countercurrent arrangement and the indoor heat exchanger adopts the concurrent arrangement (vice versa for heating). At the rated cooling condition of 35 ℃ ambient temperature

the COP is increased by 20.38% compared to the concurrent arrangement in outdoor heat exchangers

and at a rated heating condition of 7 ℃ ambient temperature

the COP is increased by 68.04% compared to the concurrent arrangement of indoor heat exchangers. Considering both the degree of backflow and fan power consumption

in the "fully heat exchange state"

system COP increases with backflow degree

while system COP decreases with backflow degree when the air flow rate is insufficient.

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references

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Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO2 Heat Pump Air Conditioning Systems for Trains

DOI：10.12465/j.issn.0253-4339.2025.04.036

摘要

Abstract

关键词

Keywords

references

Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO₂ Heat Pump Air Conditioning Systems for Trains