Current situation of indoor humid environment of buildings and characteristics of personnel humid comfort in Lhasa

The indoor extreme dryness is a prominent problem on the Tibetan plateau, and the primary task of solving this problem is to learn the current situation of indoor humid environment and the characteristics of personnel humid comfort. Taking the various typical buildings in Lhasa as the research object, this paper quantitatively analyses the current situation of indoor humid environment in Lhasa in terms of indoor humid environment parameters, humid subjective evaluation voting and humid environment regulation technology based on the field tests and questionnaire surveys. The results show that the relative humidity of indoor air in Lhasa in summer is basically in the range of 40.0% to 70.0%, but the indoor air in winter is extremely dry, and the relative humidity of indoor air in more than 90.0% of the time is lower than 30.0%. When considering the combined control of temperature and humidity, humidification can improve the comfort of local residents more effectively than increasing the indoor temperature. Nearly 80.0% of the participants in the short-term plateau residents think that the indoor is dry in winter in Lhasa and expect the level of humid environment to improve, and the proportion of humid uncomfortable voting is 67.6%, and the above proportion of long-term plateau residents decreases by approximately 30.0%. Only 1/5 of the buildings in Lhasa are equipped with traditional humidification technology, but it is difficult to effectively improve the level of indoor humid environment, and it is urgent to propose a technical method for creating a suitable indoor humid environment for the plateau.