基于多种加权评价指标的车舱热舒适性研究

Research on cabin thermal comfort based on multiple weighted evaluation indicators

为了分析空调车舱的热舒适性,建立了某款SUV 6座1∶1车舱模型和空调风道模型,引入太阳辐射模型,并通过试验舱对仿真模型进行了验证,试验结果和仿真结果相吻合,最大相对误差7%。在此模型基础上,加入人体热生理模型,利用CFD技术模拟人体体表的气流组织,针对车舱热环境不均匀的特点,采用修正的加权PMV评价人体整体热舒适性,再结合PPD、MRT指标评价人体的局部热舒适性,结果表明:乘员整体热舒适性良好,但空调出风口参数和车玻璃结构会造成乘员局部热舒适性较差,为空调车舱的热舒适性优化提供理论依据。

To analyze the thermal comfort of the air-conditioned cabin,a 1:1 cabin model of a certain SUV and an air-conditioning air duct model are established.The solar radiation model is introduced,and the simulation model is verified through the test cabin.The test results are consistent with the simulation results,with good agreement,with a maximum relative error of 7%.Based on this model,a human thermal physiological model is added,and CFD technology is used to simulate the airflow organization of the human body surface.Given the uneven thermal environment of the vehicle cabin,the modified weighted PMV is used to evaluate the overall thermal comfort of the human body and then combined with PPD and MRT.The index evaluates the local thermal comfort of the human body.The results show that the overall thermal comfort of the occupants is good,but the parameters of the air-conditioning outlet and the glass structure of the vehicle will cause the local thermal comfort of the occupants to be poor,which provides a theoretical basis for the optimization of the thermal comfort of the air-conditioned cabin.