Effect of inner surface emissivity of envelope on human thermal comfort

Based on the principle of human heat balance and radiation heat transfer, improves the PMV model of Fanger, and establishes a thermal comfort model based on the inner surface emissivity of envelope. Analyses the influence of different inner surface emissivity on human thermal comfort and mean radiant temperature in winter and summer working conditions, and obtains the optimal inner surface emissivity of envelope meeting the requirements of human thermal comfort and energy saving. The results show that the PMV value decreases with the decrease of surface emissivity in summer, and the indoor design temperature can be increased by 1 to 2 ℃ under the same comfortable conditions. The PMV value increases obviously with the decrease of surface emissivity in winter, and the indoor design temperature can be reduced by 2 to 3 ℃ under the same comfortable conditions.