汽车工程学报2025，Vol.15Issue(5)：770-779,10.DOI:10.3969/j.issn.2095-1469.2025.05.12
不同运行条件下送风温度对车用CO2热泵系统制热性能影响的试验研究
Impact of Supply Air Temperature on Heating Performance of Vehicle CO2 Heat Pump System Under Different Operating Conditions
摘要
Abstract
CO2 is widely regarded as a preferred alternative refrigerant in cold regions due to its excellent low-temperature characteristics.This paper conducts bench tests to investigate the effects of varying ambient temperatures,indoor air volume,and indoor supply-air temperatures on the operating parameters of a CO2 heat pump system.It proposes a correlation that links optimal discharge pressure to the supply-air temperature.Additionally,a real vehicle experiment was conducted to assess the system's low-temperature heating performance.The results indicate that when maintaining the same indoor supply air temperature,ambient temperature has a greater impact on compressor power consumption than on the heating capacity required,particularly at higher ambient temperatures.Raising the supply air temperature from 45 ℃ to 60 ℃increases the average power consumption of the compressor by 29.8％and lower the coefficient of performance(COP)by 17.2％.Additionally,the vehicle's driving range declines by approximately 4.82％.At an ambient temperature of-15 ℃,increasing the indoor air volume from 160 m3/h to 350 m3/h improves the COP by 15.6％、12.8％、24.4％at supply air temperatures of 30、45、60 ℃,respectively.Across different low-temperature conditions and outdoor air velocities,the evaporator outlet temperature,gas cooler inlet temperature,evaporation temperature,and optimal discharge pressure all follow consistent trends.The proposed optimal fitting correlation shows only minor relative error.关键词
热泵空调/CO2制冷剂/送风温度/系统性能Key words
heat pump air conditioning/CO2 refrigerant/supply air temperature/performance of the system分类
交通工程引用本文复制引用
滕海旭,王军,宋占桌,李胜群,李明..不同运行条件下送风温度对车用CO2热泵系统制热性能影响的试验研究[J].汽车工程学报,2025,15(5):770-779,10.基金项目
国家重点研发计划项目(2022YFE0208000) （2022YFE0208000）
