Department of Community Medicine and School of Public Health, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
Department of Community Medicine and School of Public Health, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
J Environ Manage. 2020 Aug 1;267:110655. doi: 10.1016/j.jenvman.2020.110655. Epub 2020 May 3.
Assessing the thermal comfort of the car in a hot and humid climate is crucial as it may have adverse health implications. In the current study, different models of car were used to conduct real-time monitoring of temperature and relative humidity (RH %) inside the car cabin to assess the thermal comfort of a virtual occupant. The temperature in car cabins during the monitoring period ranged between 26.7 and 64.9 °C while the range of RH was 8.3-60.4%. Data from meteorological stations were also collected to develop a scenario of thermal comfort of occupants outside the car in standing position. The PMV range as per ASHRAE 55-2017 guidelines for ambient conditions was 3.24-7.41, the car front was 8.36-11.87, and the car back was 11.5-18.04. The thermal comfort sensation was found to be hot in all instances and followed category IV of EN15251 guidelines. PMV was observed to be worst for Sedan for both front and back as per both ASHRAE 55-2015 and EN12521 guidelines. The PPD was observed to be 100% in all cases, showing dissatisfaction for all car models. The concentration of CO and CO ranged between 113-1127 ppm and 0-3.9 ppm, respectively, for the front of the car. The results were also compared with the threshold values of thermal comfort parameters according to ISHRAE Standard 10,001:2016 and found to be acceptable. Climate change is leading to extremes in temperature, this may impact the thermal comfort of the car occupants to a great extent due to the heating of the car cabins, which act as a closed microenvironment. Hence, the current study urges to formulate guidelines for car design based on thermal comfort and developing a sensor to indicate thermal comfort for occupants to avoid adverse health impacts in the hot climate.
评估湿热气候下汽车的热舒适性至关重要，因为这可能对健康产生不利影响。在当前的研究中，使用不同型号的汽车实时监测汽车座舱内的温度和相对湿度（RH%），以评估虚拟乘客的热舒适性。监测期间，汽车座舱内的温度范围在 26.7 至 64.9°C 之间，相对湿度范围在 8.3-60.4%之间。还收集了气象站的数据，以制定车外站立乘客热舒适的情景。根据 ASHRAE 55-2017 环境条件指南，PMV 范围为 3.24-7.41，车前部为 8.36-11.87，车后部为 11.5-18.04。在所有情况下，热舒适度感觉都很热，并且遵循 EN15251 指南的第四类。根据 ASHRAE 55-2015 和 EN12521 指南，对于所有轿车，前后 PMV 都被观察到最差。在所有情况下，PPD 均为 100%，表明所有汽车型号均不满意。汽车前部的 CO 和 CO 浓度分别在 113-1127 ppm 和 0-3.9 ppm 之间。还将结果与 ISHRAE 标准 10,001:2016 中的热舒适参数阈值进行了比较，结果发现是可以接受的。气候变化导致温度极端，这可能会极大地影响汽车乘客的热舒适性，因为汽车座舱会加热，从而形成一个封闭的微环境。因此，当前的研究敦促根据热舒适性为汽车设计制定准则，并开发一种传感器，为乘客指示热舒适度，以避免在炎热气候下对健康产生不利影响。
