Effects of human physiological thermoregulation on thermal comfort in a naturally ventilated environment in summer

The purpose of this research is to discuss the effect of human physiological factors on thermal comfort indoors. In the natural ventilation environment in summer, the effectiveness of human physiology adjustment on alleviating thermal discomfort was discussed through indoor thermal environment measurement, physiological experiment test, questionnaire, and other methods. The influence of skin temperature and sweat on human thermal sensation was analyzed. The results showed that the influence of skin temperature and sweat on human thermal sensation in summer could not be ignored. A modified predicted mean vote (mPMV) based on predicted mean vote (PMV) is proposed, and the accuracy of the model is evaluated. The results show that the mPMV meets the accuracy requirements at the application level and can be used for thermal sensation prediction in partially hot summer environments. A comparative analysis of thermoneutral temperature differences (T_DE) calculated from mPMV and PMV revealed that the human body extends the range of acceptable temperature differences by 0.9 scales at one end through physiological. With the largely improved prediction quality, the research contributes to the development of energy-efficient thermal comfort buildings that benefit human health.