Primary Research On Human Thermal Comfort Under Low-pressure Environment Of Middle-altitude Areas

Experiments are carried out to study human thermal comfort under low-pressure environment in simulating low-pressure environment of below 3000m regions (At high altitude above 3000m, mountain disease is the most chief problem to be solved by physiological and medicinal methods.) in this article, which mainly research the impact that low-pressure environment influence on main thermal sensation and primary physiological indexes using questionnaire.Fristly, human convective heat exchange and skin evaporative heat exchange under low-pressure environment are analyzed, in addition, human respiratory heat exchange, metabolic rate and some physiological indexes under low-pressure environment are discussed, which is great significant to study human thermal comfort under low-pressure environment, and it provides reference for the experiments under low-pressure environment theoretically.Using orthogonal experiment method, the markednesses effected by air temperature, air pressure and air velocity on main thermal sensation and primary physiological indexes are analyzed. At the same time, parallel experiments (Apart from orthogonal experiment method, other experiments are named parallel experiments in this article) are carried out to analyze the influence of low-pressure environment on thermal neutral temperature and main thermal sensation. On the other hand, the trend of low-pressure environment on thermal neutral temperature and main thermal sensation is explained by experimental data. Otherwise, main thermal sensation votes is compared with PMV gained by instrument under different low-pressure, and the applicability of PMV under low-pressure is discussed. Finally, apply t-test analysis methodology to analyze the primary physiological data of human body, then acquire visible influence degree and trend of low-pressure environment parameters on primary physiological indexes of human body.So far, the studies on human thermal comfort under low-pressure environment are few, therefore, this paper is likely to provide some theoretic and experimental references to research the human thermal comfort and design the comfortable air conditioning under low-pressure environment. Moerover, it is great important for inhabitant to improve the living environment and quality of life.