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| Study on the Heat Balance Performance of Vehicle Cooling System at Altitude Conditions |
| Received:August 06, 2020 Revised:October 19, 2020 |
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| DOI：10.7643/issn.1672-9242.2021.02.001 |
| KeyWord:vehicle engine cooling system high altitude heat dissipation heat balance |
| Author | Institution |
| XU Xiang |
CATARC Changzhou Automotive Engineering Research Institute Co., Ltd.Changzhou, Jiangsu , China;CATARC Tianjin Automotive Engineering Research Institute Co., Ltd.Tianjin , China |
| WANG Dan |
CATARC Tianjin Automotive Engineering Research Institute Co., Ltd.Tianjin , China |
| XU Jun-fang |
CATARC Tianjin Automotive Engineering Research Institute Co., Ltd.Tianjin , China |
| WANG Pu-kai |
Army Academy of Armored Forces, Beijing , China |
| LIU Gang |
Army Military Transportation University, Tianjin , China |
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| Abstract: |
| This study aims to analyze the effects of altitude (atmospheric pressure), ambient temperature, coolant temperature and cooling air volume on the heat dissipation performance of vehicle cooling system at altitude conditions. The means of test and simulation were used to the study. The results show that, the heat dissipation from the engine water jacket increases by5.3% with the altitude increaseby 1,000 m; the heat dissipation from the engine water jacket decreases by 14.5% with the coolant temperature increase by 10 ℃. With the altitude increase by 1,000 m, if the engine heat balance state remains unchanged (outlet coolant temperature remains constant), the cooling air volume at radiator inlet should increase by about 8.8%. With the goal of keeping the engine heat balance constant, the MAP of cooling air volume of radiator changing with the engine speed, load and altitude was calculated, which provides a reference for the matching design and optimization of the vehicle cooling system at altitude conditions. |
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