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Numerical Study of Heat Transfer and Pressure Drop Characteristics of an Evaporator-Gas-Cooler Cooling Dual-Purpose CO2 Microchannel Heat Exchanger at the Passenger Compartment Side
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Jiaqi Wei, Weidong Wu, Yichen Huang, Lang Chen, Jie Feng
Automotive Engineer | 2026, (2) : 9 - 14
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Automotive Engineer | 2026, (2): 9-14
• Selected Papers of China Annual Academic Conference on Automotive Thermal Systems 2025 •
Numerical Study of Heat Transfer and Pressure Drop Characteristics of an Evaporator-Gas-Cooler Cooling Dual-Purpose CO2 Microchannel Heat Exchanger at the Passenger Compartment Side
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Jiaqi Wei, Weidong Wu, Yichen Huang, Lang Chen, Jie Feng
Affiliations
  • School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093
Published: 2026-02-15 doi: 10.20104/j.cnki.1674-6546.20250153
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This study developed and validated a one-dimensional simulation model on the Dymola platform to analyze the performance of a dual-mode evaporative-gas-cooled microchannel heat exchanger under various operating conditions. The effects of various refrigerant and air inlet parameters on the heat transfer and pressure drop characteristics of the microchannel heat exchanger in Heat Pump (HP) mode are analyzed. The simulation results show that in HP mode, a moderate increase in refrigerant inlet pressure and heat exchanger inlet airflow volume can both enhance the heat exchange amount while reducing the pressure drop on the refrigerant side. For each 0.5 MPa increase in refrigerant inlet pressure, the heat exchange amount increases by 2.6%, averaging a 9.5% reduction in the pressure drop on the refrigerant side. Increasing the air inlet volume on the air side and decreasing the air inlet temperature both reduce the pressure drop while increasing the heat transfer, but simultaneously decreasing the outlet air temperature.

Automotive air conditioning  /  Evaporator-gas-cooler dual-purpose heat exchanger  /  CO2 heat pump system  /  Heat transfer performance  /  Pressure drop
魏嘉祺, 武卫东, 黄逸宸, 陈浪, 冯杰. 乘员舱侧蒸发-气冷双用型CO2微通道换热器传热与压降特性研究. 汽车工程师, 2026 , (2) : 9 -14 . DOI: 10.20104/j.cnki.1674-6546.20250153
Jiaqi Wei, Weidong Wu, Yichen Huang, Lang Chen, Jie Feng. Numerical Study of Heat Transfer and Pressure Drop Characteristics of an Evaporator-Gas-Cooler Cooling Dual-Purpose CO2 Microchannel Heat Exchanger at the Passenger Compartment Side[J]. Automotive Engineer, 2026 , (2) : 9 -14 . DOI: 10.20104/j.cnki.1674-6546.20250153
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Year 2026 volume Issue 2
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doi: 10.20104/j.cnki.1674-6546.20250153
  • Online Date：2026-09-20
  • Published：2026-02-15
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  • Revised：2025-06-20
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    School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093
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表12种不同金属材料的力学参数
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Number of
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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