Experimental Study On Thermal Adaptation And Comfort Of People Under Physical Activities

Human adaptability is an important area of human thermal comfort studies.The study of thermal adaptation theory and model is of great significance to set workshop's temperature.With the rapid economic development,industrial workshops are increasing.Most existing field studies were conducted mainly in classrooms,offices and residential buildings.Few investigate people taking physical activities in factories and the related thermal adaptation model is not perfect enough.To solve the above problem,the thermal comfort field studies were carried out in the workshop.The thermal response rule and adaptive behavior of workers are systematically analyzed in summer.The human adaptive models of enterprise workshops in summer are established.At the same time,the thermal comfort of the workers under the natural ventilation condition in the transition season and the heating condition in winter were analyzed.The yearly thermal adaptation model of the enterprise workshop was established,and the comfort temperature ranges are given.The main conclusions are listed as follows:1)In summer,restricted by working clothes,the clothing insulation of workers was between 0.6clo-0.7clo,which means regulating effect on thermal comfort by changing clothes is very limited.In the transition season and winter,workers can change their clothes according to their own habits to improve thermal comfort.2)The summer,the neutral temperature measured on spot is higher than that of PMV.It shows that the heat resistance of workers are higher than those predicted.The workers have certain adaptability to the thermal environment.In the transition season and winter,the neutral temperature measured on spot is lower than that of PMV.It indicates that the standard requirement data of PMV can not be fully applied to the workshop studied in this paper.3)The linearity relationship is significant between the operative temperature and outdoor temperature in every season.4)In summer,the workers have strong adaptability to high temperature in the workshop.And the acceptance of the high temperature environment is higher than the existing theoretical expectations.The adaptive model in summer was established.5)The whole year data are analyzed.The adaptive models of enterprise workshops at different temperatures are established.And the comfort temperature range of workers under moderate physical activity at different outdoor temperatures is given,which can be used to evaluate the indoor thermal environment of similar physical activity range and provide theoretical guidance for the design of thermal environment.