Human Thermal Comfort Research In Hot Environment

Recent years,as the great change of our ecnomic situation and the growth of labour force,the shortage of worker become serious in Chinese textile industry.One of the reason is the poor thermal comfort.In summer,the average temperature often reach 30 ℃ in textile workshop,sometimes even 40℃.Acutally,high temperature in textile is good to save energy,but exceed temperature will low the efficence and motivation of the workers.In generally,we used PMV-PPD model to measure the influence of the thermal environment.However,the PMV-PPD model usually appiled to tiny zone like office or classroom.etc. While it will lead to a large difference in actual workshop.Because of the poor textile thermal research,we engaged to study the human thermal comfort in hot environment.This research used constant temperature and constant humidity lab,based on GB standard and ralated reseach to study thermal comfort.The experinment simulated the textile environment by control the temperature and humidity in lab and survey the volunteers’ thermal comfort.After the experiment,the PMV calculation program was writen by tested temperature,humidity,air speed,black ball temperature,cloth situation and human activity.We calculated the PMV and PPD in certain point and compared the result with TCV,TSV,then we calculated the linear regression equation and judge the suitability of the PMV-PPD model in textile.Finally,the thermal comfort combined weights of five cotton textile workshops was calculated in order to provide a simple method to compare the comfort in textile,furthermore supply a new way for thermal comfot research.