Study On The Indoor Thermal Environment And Human Thermal Comfort In Natural Ventilation Building In Summer-Hot And Winter-cold Zone

Above 80% of one's whole life time is spent in staying at home, therefore, with the development of technology and the improvement of live quality, the requirements of indoor thermal comfort has become more and more strict. The international standard, such as ASHRAE Standard 55-2004 and ISO7730, which be used to predict and assess the indoor thermal comfort are all based on thermal neutral sensation. These standards are applicable to constant environment. As to the natural ventilation building or no air-conditioning building, these models are not predicting the human thermal response correctly, which has been proved by more and more field studies. Especially to the summer hot and winter cold zone, these models have not taken physiological, psychological and behavioral adaptation, which have effect on the subjective thermal sensation into account. Therefore, it is necessary to carry out the studies, which aim to the indoor thermal environment and human thermal comfort in the typical climatic zone. The methods adopted combine the questionnaire investigation with the thermal environmental parameters in order to find out the relationship between thermal sensation and indoor/outdoor environmental parameters. Meanwhile, the results of the field study could be not only as the theory support of working out the healthy and comfortable indoor thermal environmental standard in summer hot and winter cold zone, but also play an important role in green building development and strengthen sustainable develop strategies.In this Master thesis, the completely literature review has been made on indoor environment and thermal comfort research area firstly. Then, the thermal comfort theory basis has been introduced as following aspects: thermal comfort equation, indoor environment and thermal comfort assess index, and thermal comfort affect factors. In Chapter 3, the Adaptive Model applicable to the natural ventilation or no air- conditioning building thermal comfort assessment has been expounded specially. Dr. Yao's thermal comfort adaptive model has been quoted, and proved to be correct and practicability by the results of this field study. And also, theαin the equation had been calculated which is suitable for the Chongqing case.From the Chapter 4, it is the results analysis and discussion of this year-long natural ventilation building study. From the results we can see that the whole year indoor thermal environment is poor in summer hot and winter cold zone, especially in summer and winter seasons. Without the air-conditioning and heating, the indoor thermal environmental parameters are not in the ASHRAE's comfort zone. Through the analysis of the data collected from the field study, the linear regressive curves of PMV and AMV to the indoor/ outdoor air temperature are obtained. Through the further analysis of the linear regressive curves, we find that there are differences about the subjective sensation vote, difference critical temperature, thermal neutral temperature, acceptable temperature and sensitive of subjective thermal sensation to air temperature under the PMV model and AMV model. The reason leading to the differences is the respondents'physiological, psychological and behavioral adaptation. All of these proved that human has the ability to adapt to environment greatly. Human being is not passive respondent, but also the positive adaptive one. Because the variation of outdoor air temperature have effect on the indoor air temperature through maintenance architecture, furthermore, respondents'thermal sensation and comfort will also be influenced. Based on the great samples, the linear regressive curve of outdoor air temperature to indoor comfortable temperature is got through linear regression. Meanwhile, in this thesis the statistics of thermal comfort temperature, prefered temperature, and percent of dissatisfaction are made. From the statistics, we get the following conclusions: indoor comfort temperature in summer is 24.8-28.3℃; indoor comfort temperature in winter is 17.5-23.0℃; the whole year indoor comfort temperature is 21.8-25.8℃. The whole year indoor acceptable temperature is 15.89-28.14℃, which is wider than the result got according to the PMV-PPD model, 21.8-25.8℃. This mainly because under the actual situation of improve indoor thermal environment measures, the respondents produce the physiological, psychological and behavioral adaptation. As to the predicted percent of dissatisfaction (PPD), the max and min value are 100% and 6.0%, respectively. The whole year mean predicted percent of dissatisfaction is 44.3%.