Study On Optimization Of Indoor Thermal Environment Of Underground Commercial Buildings

Underground commercial buildings are the product of the rapid development of modern cities,which play a role in alleviating urban contradictions,promoting the economic development of urban centers and improving the living environment.With the continuous development of underground commercial buildings,people put forward new requirements for indoor thermal environment.Based on this phenomenon,this paper studies the indoor thermal environment of Xuzhou underground commercial buildings.Based on the current situation of underground commercial buildings in Xuzhou City,Jiangsu Province,this paper chooses representative underground commercial buildings for research.Firstly,based on the development status of underground buildings at home and abroad and the literature review of indoor thermal environment of underground commercial buildings,this paper objectively summarizes the research trends and methods of indoor thermal environment of underground commercial buildings,and determines the three research approaches of field measurement,questionnaire survey and simulation analysis.Through sorting out and explaining the relevant theories and nouns,the main influencing factors and adjusting methods of indoor thermal environment in underground commercial buildings are selected.Taking three underground commercial buildings in different regions of Xuzhou as the research object,the indoor thermal environment was measured and investigated by questionnaire.By sorting out and analyzing the measured data,the indoor thermal environment characteristics of underground commercial buildings under different conditions are summarized.Through questionnaire survey,the thermal sensation and thermal comfort satisfaction of users are summarized and analyzed.The linear relationship between operating temperature and PMV value is obtained by combining measured data and PMV model,and the thermal neutral temperature in summer and winter is calculated.Through Phoenics simulation software,the indoor thermal environment of two typical spaces in summer and winter was simulated,and the current situation was analyzed and summarized.By setting boundary conditions,changing the location and type of air supply outlet and return outlet,the thermal environment and PMV-PPD distribution of typical space under different regulation modes were obtained.By comparing and analyzing the indoor thermal environment under different regulation modes and combining with the layout of building space,two typical suggestions for optimizing indoor thermal environment are put forward.Finally,it is hoped that the research of this topic can play a certain reference role for the architectural design,energy-saving renovation and HVAC design in related fields.