汽车工程学报2024，Vol.14Issue(6)：1072-1082,11.DOI:10.3969/j.issn.2095‒1469.2024.06.14
重型商用车怠速与爬坡工况对空调制冷性能的影响
Research on Air-Conditioning Refrigeration Performance of Heavy Commercial Vehicles Under Idling and Climbing Conditions
程浩杰 1徐亚坤 1任黎亚 1董丽萍 1王晓龙 1张磊 1张艺伦2
作者信息
- 1. 中国重汽集团 汽车研究总院,济南 250100
- 2. 中汽研(天津)汽车工程研究院有限公司,天津 300300
- 折叠
摘要
Abstract
The refrigeration performance of the air-conditioning system in heavy commercial vehicles is severely constrained by specific driving conditions and the engine compartment layout.The thermal-flow field model and AC cooling system model of a heavy-duty truck are built using Star CCM+and AMESim,respectively.The refrigeration performance is analyzed through simulations under high-temperature idling and high-torque climbing conditions.Experimental validation is conducted in an environmental wind tunnel.The effects of compressor speed ratio,condenser inlet air temperature and flow rate,and blower speed on the refrigeration performance are investigated.The simulation results of the air conditioning system are in good agreement with the bench test results,with a maximum error of 4.7% .At 5 000 r/min,the blower can provide an air flow rate of 470 m3/h for the air conditioning duct.Under the idle condition,the average flow rate on the inlet side of the condenser is 2.77 m/s.However,thermal reverse flow in the engine compartment severely affects the COP and the high and low pressures of the air conditioning system.For the optimized and base versions of the B-type vehicle,the system COP decreases by 8.3% and 15.8%,respectively,compared to the A-type vehicle.关键词
空调制冷系统/发动机舱/冷却模块/热回流/性能系数Key words
air conditioning refrigeration system/engine compartment/cooling module/thermal reversed flow/coefficient of performance分类
交通工程引用本文复制引用
程浩杰,徐亚坤,任黎亚,董丽萍,王晓龙,张磊,张艺伦..重型商用车怠速与爬坡工况对空调制冷性能的影响[J].汽车工程学报,2024,14(6):1072-1082,11.
