Study On The Indoor Human Thermal Comfort Of A Tianjin Office Building In Summer Based On Energy Saving

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 summer. 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 impact on the human body thermal comfort.This study based on a certain office building in Tianjin, in order to save energy, adopted the combination of field interference investigation and theoretical calculation. It researched the indoor environmental factors which impacted on the human body thermal comfort in an office building in Tianjin in summer. In order to explore a design institute building's thermal comfort, the questionnaires were put out and tested room parameters, recorded the staff thermal comfort situation in the different indoor environment. 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 impact on the human body thermal comfort.This paper first according to the preliminary results of human body thermal comfort study, concluded the lowest dissatisfied rate, found it was lower than Fnager's result. It is showed that the Tianjin office building staff was easy on the environment meet. Meanwhile, it combed the adaptive behavior survey findings. Then it set up a multiple linear regression model about thermal sensation and indoor environmental factors, analyzed indoor environmental factors on human thermal comfort influence degree. The results showed that: in environmental factors, wind speed is the main factor affecting thermal sensation; the air temperature and mean radiant temperature are secondary factors affecting thermal sensation; relative humidity affected a little on thermal sensation. Based on the findings of this paper, it also provided advice for air-conditioning energy saving operation. Recommend from late spring early summer, the whole summer to late summer early autumn, rationally use ceiling fans. It could increase the air velocity in order to improve the indoor temperature in summer, so as to achieve the requirement of building energy conservation operation.Furthermore, this paper compared standard effective temperature and predicted mean vote. It considered Fanger' s thermal comfort equation environmental prediction was not accurate. The predictive value overestimated the actual thermal sensation. Finally it selected the standard effective temperature as research paper analysis indicators. According to this index, it obtained the neutral temperature, acceptable temperature upper limit and the desired temperature in Tianjin. Compared with the findings of other regions, the study found people in Tianjin and the same latitude area had similar ability to accept heat, but different parts of China had inequality accept ability. Desired temperature was slightly lower than the neutral temperature because when people lived in hot climates, they were more adaptable to high temperature and could withstand higher temperature, thermal sensation of the current environment and expectations for the environment would be reduced. Tianjin comfort zone width was similar to the other regions in China, wider than the developed regions.