Research On Influencing Factors Of Outdoor Thermal And Humid Environment In Residential Area Of Hefei In Summer

With the continuous development of the city,the urban residential area has become an important area of residents’ life.The quality of its environment directly affects the quality of life and physical and mental health of the residents.The various underlying surfaces of the city gradually replace the original land,vegetation,and other primitive underlying surfaces,resulting in the formation of a unique local climate in the residential area.However,the current microclimate research on residential areas in areas with hot summers and cold winters mainly focuses on the research on the wind-heat environment,and less research on the hot-humid environment,therefore it is necessary to study the effects of climate change in the region.This paper takes the hot and humid environment in the hot summer and cold winter areas as the research object,using the research method combining field measurement and numerical simulation,based on the research of the urban canopy model,coupled with CFD software,and analyzes the hot summer and winter cold.and also changes in regional thermal and humid environment and the correlation of influencing factors.First,taking Hefei,a representative city in the hot summer and cold winter area as the research object,to grasp the current situation of the layout form,green area,and building orientation of urban residential areas in Hefei,to determine the typical residential area in Hefei.Then select representative plots for on-the-spot measurements,and use relevant professional instruments to record atmospheric physical parameters in the settlements.Secondly,by combining the urban canopy model with the CFD model,a CFD unsteady simulation method for the thermal and humid environment of the residential area is established,and the validity of the model is verified using the field measurement results in Chapter 2.Thirdly,based on the CFD unsteady prediction method of thermal and humid environment in residential areas established in Chapter 3,the effects of building density,building height,grassland coverage,and forest land coverage on the thermal and humid environment of residential areas in Hefei were simulated and analyzed through single-factor numerical experiments,and established a prediction formula.Finally,to comprehensively consider the joint effect of various factors on the thermal and humid environment in residential areas,through multi-factor orthogonal experiments,the order of the influence of each influencing factor on the thermal and humid environment is analyzed,and the optimal evaluation index for the thermal and humid environment in residential areas is proposed.And the regression model was established through regression analysis,and the change law of the heat and humidity environment in the residential area in the Hefei area under the combined action of various factors was summarized.To sum up,this paper uses the research methods of field measurement and numerical simulation,combines the urban canopy model with CFD software,and uses CFD unsteady simulation to study the change law of the heat and humidity environment in Hefei area,and determine the building and underlying surface.The degree of influence of relevant influencing factors on the thermal and humid environment of residential areas has certain guiding significance for improving the residential environment,improving the quality of life,and residents’ comfort through reasonable planning methods.Figure [41] table [18] reference [67]...