Study On The Spatial Form Of Highdensity Commercial District In Cold Area Based On Thermal Comfort Demand

With the rapid development of urban construction,under the influence of cold and severe weather conditions,the demand for improving the living environment is growing day by day.Among them,the optimal design of outdoor thermal environment of urban high-density commercial district can improve the overall spatial quality of urban area,thus promoting regional economic development.At the same time,with the development of computational design concept and parametric modeling technology,performance simulation plays an increasingly important role in the decision-making of urban block space form design.Therefore,taking high-density commercial district in cold area as the research object,through field investigation and software simulation of outdoor thermal environment,it is helpful for designers and local managers to understand the impact of space form of high-density commercial district in cold area on outdoor thermal environment,and provide guidance for urban design and renewal.Firstly,this paper expounds the concept,characteristics and types of highdensity commercial district in cold area,and makes a case study and summary of typical high-density commercial district in cold area.Combined with the theoretical basis of outdoor thermal environment,this paper puts forward the relevant parameters of the spatial form of high-density commercial block in cold area,and analyzes the influence of each parameter on the thermal environment.Secondly,through the test and questionnaire survey of the outdoor physical environment of a high-density commercial district in Harbin,the outdoor thermal environment and residents’ needs in cold area are analyzed in depth.The outdoor thermal comfort level of the commercial district in cold area is evaluated qualitatively and quantitatively,and the probability method is used to revise the scope of pet scientifically,At the same time,the correlation and influence weight of meteorological parameters and morphological parameters on thermal evaluation index pet,thermal sensation index TSV and thermal comfort index TCV are explored,which can provide reference for outdoor thermal environment design of high-density commercial district in cold region.Finally,according to the field survey of high-density commercial blocks in cold region,the parametric model is constructed and abstracted.The numerical simulation is carried out from three aspects: block shape control index,street level gorge shape,architectural shape and layout form.The outdoor thermal environment of high-density block in cold region was simulated in summer and winter.Combined with the modified evaluation scale of outdoor thermal comfort index pet in cold region,the simulation results are discussed and screened,and the influence law of outdoor thermal comfort of high-density commercial block is revealed.Finally,the space form design strategy of high-density commercial block in cold region with reference value is put forward.