基于等效均匀温度的车内热环境分析

Analysis of Thermal Environment in Vehicle Based on Equivalent Homogenous Temperature

摘要:

通过计算流体力学(CFD)与人体热调节模型的耦合仿真，得到人体整体和各节段的等效均匀温度(EHT）.对比空调送风速度、送风温度与太阳辐射强度对整体EHT、平均皮肤温度及各换热损失量的影响，得到各因素变化时所处的EHT舒适区，采用试验设计法和方差分析法，得到3个影响因素对整体EHT、各节段EHT、平均皮肤温度及干热损失量的贡献率，发现送风条件影响大于太阳辐射，其中送风温度的影响最显著.在此基础上，得到EHT的拟合方程，并提出基于拟合方程改进空调控制的新思路.

Abstract:

The EHT (equivalent homogenous temperature) was calculated by using the coupling model of CFD and human thermoregulation model. The effects of air conditioning velocity, temperature, and solar radiation on overall EHT， mean skin temperature, and dry heat loss were compared, and the contribution ratio of the these factors were calculated. The results show that the influence of air conditioning is greater than that of solar radiation, in which the influence of the supply air temperature is most significant. Finally the fitting equation of the three factors and EHT were obtained, and a new idea to improve air conditioning controlling based on the fitting equation was proposed.