Study Of Human Thermal Comfort Based On The Tianjin Office Building

Development and progress of human society cause people to stay indoors for a long time.Thus,people's health,comfort and work efficiency are closely linked with the indoor environment.However,entering the 21 st century,energy and enbironmental crisis increase seriously.Human society develope to a sustainable,low-carbon life and the pursuit of energy with the least expense to create a comfortable themal environment has become an urgent need.This study adopted the combination of field interference investigation and theoretical calculation,researched the indoor environmental factors impacted on the human body thermal comfort in an office building in Tianjin in the whole year.Based on the diversity of the building air conditioning system,change the related parameters affecting thermal comfort artificially.At the same time,the questionnaires were put out and room parameters were tested.Then using statistical method,calculated the result of the data theoretically,analyzed how much degree did the air temperature,air humidity,air velocity and mean radiant temperature of different indoor environment factors impacted on the human body thermal comfort.Firstly,according to preliminary results of the field interference investigation,we obtained the lowest unsatisfactory rate in the survey and it's less than the Fanger's results,which indicated Tianjin staff were more easily feel comfortable than other districts.And we summarized the survey results of adapting behavior.Followed by an analysis of the outdoor dry bulb temperature affecting the indoor thermal comfort,and we found the body had been completely adapted in an artificial environment,the impact on the outdoor environment is not sensitive.By contrasting and Fanger's PMV predictors,we found that thermal comfort equation of Fanger is not accurate to the environmental prediction,which valued overestimate people's real thermal feeling.Finally,we selected the standard effective temperature as the criteria of this paper.According the SET,we obtained neutral temperature the upper limit of acceptable temperature and the desired temperature of Tianjin office building.The desired temperature tends to be cooler or warmer and it is similar with the neutral temperature.By comparison with the findings of other areas,we found the heat acceptance quite different in different regions of China,Tianjin and the same latitudes have the similar heat receiving capacity.The summer comfort width in Tianjin zone is similar to other regions in China,but the winter comfort width is quite different in different regions,because people have more strong adaptation in the cold environment.Winter comfort width is larger than the summer,which further illustrates the staff adapt the cold environment.Finally,comparing the impact gender and exercise on human thermal comfort,we found that women are more likely to feel cold,and exercise had little influence on the human thermal comfort.