摘要
为研究高速动车上跨临界CO_(2)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。
To further study the influence of heat exchanger structures on system performance and overall power consumption in transcritical CO_(2) 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 exchanger 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.
作者
谢宏生
白刚
杨梦莹
宋昱龙
曹锋
Xie Hongsheng;Bai Gang;Yang Mengying;Song Yulong;Cao Feng(School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an,710049,China;CRRC Dalian Locomotive Research Institute Co.,Ltd.,Dalian,116000,China)
出处
《制冷学报》
北大核心
2025年第4期36-43,共8页
Journal of Refrigeration
基金
国家自然科学基金(52006161)资助项目
广东省重点领域研发计划项目(2023B0909050005)资助
关键词
跨临界CO_(2)热泵空调
高速动车
换热器顺逆流
最优结构
transcritical CO_(2)heat pump air conditioning
rail vehicles
heat exchanger co-current and counter-current
optimal structure
