The Study Of Residential Indoor Thermal And Humid Environment In Tibet Area

Most of the current research on indoor thermal comfort is at low altitudes, while the indoor thermal environment and thermal comfort research in high altitude hypoxia environment like Tibet is relatively small, there are few scholars involved. The Tibetan Plateau is the largest in China, the world’s highest plateau, located in the southwest of China. Tibet is an important part of the Tibetan Plateau, and the vast majority belongs to the cold and severe cold regions, with harsh natural environment such as thin air, low humidity, strongly solar radiation and so on. The climatic characteristics are greatly different from the low altitude regions with the same latitude, all of these will cause different effects on the indoor thermal environment, thus the indoor thermal environment at high altitude is different from the indoor thermal environment at low altitude in Tibet. Also, the life style and behavior habits of Tibet residents at high altitude area are greatly different from them with the same latitude but at low altitude regions which may affect the Tibet residents feeling of indoor thermal comfort, and proposal different thermal comfort requirements of the indoor thermal environment. Therefore, it is necessary to study the characteristics of residential indoor thermal environment in high altitude region in Tibet, and fully understand the real situation like the indoor thermal environment of Tibet area, and compare it with the same latitude and low altitude indoor thermal environment, and complete the basic data in the civil construction in indoor thermal environment standard in high altitude area. The main contents of this paper include:First, this paper systematically introduced the domestic and foreign research status of thermal and thermal comfort research in high altitude area. Then this paper illustrated the basic theory research of indoor thermal environment, the main factors affecting the thermal comfort of human body, the human thermal comfort equation, and the human thermal comfort model of adjusting. The indoor thermal environment test and field test methods are introduced in detail, including the basic situation of the investigation and testing of the city, the objective environment and subjective test method of site survey, organization and implementation, and the data from the on-site investigation of the pretreatment of field investigation.Combined several field test results of residential buildings in high altitude area in Tibet in the summer and winter in 2013 and the summer in 2014, indoor thermal environment characteristics of residential buildings in Tibet area were analyzed, including the form of the local buildings. Also, the clothing insulation of the local residents, the acceptable temperature range, PMV and AMV contrast were analyzed. In a cold environment in Tibet, thermal comfort model adaptive coefficient was solved, and got the conclusion that λ=-0.34 in high altitude region of Tibet’s. According to the "value and reference civil construction indoor thermal environment evaluation standard", the acceptable thermal comfort temperatures of the Tibet residents in residential buildings were within range of 13.16℃ to 26.76℃.Finally, this paper compared the indoor thermal environment characteristics in Tibet area with the areas with the same latitude but low altitude, including the indoor thermal sensation vote differences at the same outdoor temperature, the differences of acceptable temperature range, the differences in clothing insulation, and the AMV differences. In the analysis of differences at the same time, this paper provided references for improving the residents indoor thermal environment in high altitude region of Tibet.