Study On Thermal And Humidity Environment Of Commercial Underground Parking Lot In Xuzhou

With the increasing demand of underground space development in the process of urbanization,as an important part of the underground parking lot also has a huge development space,which has the characteristics of closed,constant temperature,high humidity and so on.Among them,the commercial underground parking lot is characterized by large scale,high frequency of use and close relationship with commercial buildings,so the study of its thermal and humid environment and thermal comfort is particularly important.The object of this study is Xuzhou commercial underground parking lot.Based on the cold climate of Xuzhou,the thermal and humid environment and thermal comfort were studied.Through the field test of three typical commercial underground parking lots in winter,a large number of original data are obtained.This paper summarizes the characteristics of thermal environment of Xuzhou underground commercial parking lot in winter: In the test,the overall change range of temperature is between 1.3 ℃ and 13.7.the floating range of humidity is 28.8%-74.9%.Through on-site subjective questionnaire survey,the thermal environment satisfaction of the three subjects was analyzed.After analysis,it was found that the thermal environment of three subjects needed to be improved,and one of them was dissatisfied with 38%,which meant that adjustment was needed.Through the questionnaire survey,the thermal environment satisfaction of people in three parking lots was analyzed.Combined with the results of field measurement and questionnaire,the thermal comfort of underground parking lot in Xuzhou City is analyzed.The PMV model and MTS model are established by linear regression.The thermal neutral temperature and acceptable temperature range are obtained respectively: MTS=0.1283top-1.999,acceptable temperature range:11.6 ℃ ~19.5 ℃(90%)? 9.7 ℃ ~21.4 ℃(80%);PMV=0.1457top-2.0784,acceptable temperature range :10.8℃~17.7℃(90%)?9.1℃~19.4℃(80%).On the basis of field investigation and thermal comfort analysis,this paper summarizes the strategies of thermal and wet environment regulation in the underground parking lot.Through the establishment of airpak model,the temperature distribution and air velocity in the parking lot under different entrance and exit distribution and different skylight distribution are simulated and analyzed.Finally,it is expected that this study can provide theoretical basis and practical reference for the thermal environment design of commercial underground parking lot and other types of underground space in Xuzhou area.