电动汽车乘员舱空调送出风方式设计

Design of Air Supply-out Layout of Air Conditioning for Electric Vehicle Cabin

摘要:

基于流场结构与车内热环境相关性，提出5种不同于传统方式的新型空调送出风方式。采用计算流体力学（CFD）仿真结合人体热调节模型，分析不同送出风方式下车内热环境特点。利用等效均匀温度（EHT）热舒适性评价法对各送出风方式进行评估。结果表明，平均辐射温度和平均风速对驾乘人员热感觉的影响大于车内平均温度；顶送顶出方式和2种混合送出风方式具有最好和最差综合性能，而传统送出风方式下乘员舱热舒适均匀性和能耗性能均较差。

Abstract:

Based on the correlation between flow structure and thermal environment inside vehicle cabins， five new air supply-out layouts different from traditional layouts were proposed. CFD simulation combined human thermal regulation model was used to analyze the characteristics of the cabin thermal environment under each layout. Then， the equivalent homogeneous temperature （EHT） based thermal comfort model was used to evaluate each layout. It is shown that the mean radiant temperature and mean air velocity have greater impact on the cabin thermal comfort than the average air temperature of the cabin. The top supply-out layout and the two composite layouts demonstrate the best and worst overall performance respectively， while the traditional air supply-out layout displays a high energy consumption with poor comfort uniformity.