Research On The Impact Of Public Space Layout Of High-Rise Residential Districts On Microclimate In Baotou City In Transition Season

With the promotion of urbanization,urban land resources are getting tighter,the contradiction between urban population and land resources has become increasingly prominent,and the construction of high-rise residential areas is a significant means to solve this contradiction.At present,designers only focus on meeting the basic functional requirements of high-rise residential areas,ignoring the impact of the microclimate of outdoor residential areas on people,but this is extremely important.Therefore,This paper studies the influence of the arrangement of outdoor public spaces in high-rise residential areas Districts on Microclimate in Baotou City in Transition Season.Firstly,based on field research of representative residential areas within the four municipal districts of Baotou City and combined with an online search engine,we have a preliminary grasp of the land use scale,floor area ratio,building density,and construction of the representative residential areas in Baotou City in the past ten years.Objective information such as the layout,number of building floors,and the current situation of the layout of the outdoor public space in the residential area,further sort and summarize the objective data.Secondly,by reading pertinent literature,summarizing the relevant layout elements which impact public space and the corresponding quantitative methods.The layout factor include the area,location,dispersity and relationship with the wind direction of the public space.The quantification method is the corresponding the proportion of public green space?text description?average nearest neighbor distance ratio and angles with the dominant wind direction in spring,summer and autumn.Bassing the microclimate numerical simulation software ENVI-met,a numerical generalization model of high-rise settlements that conforms to the actual situation and objective data is constructed,and these models under typical centralized and decentralized public space layout modes.Then combined with the software ENVI-met to simulate the microclimate of each case in typical weather days in the three seasons of spring,summer and autumn,based on the evaluation of single physical indicators of microclimate,air temperature,relative humidity,wind speed and comprehensive theoretical indicators thermal comfort further analyzes the simulation results.By studying,it can be concluded that the larger the proportion of public space,the greater the change in the microclimate effect of the residential area(the temperature decreases,the humidity increases,the wind speed decreases,and the thermal comfort is better in autumn).When the proportion of public space reaches 4% The temperature environment and thermal comfort of the human body are the best in the residential area.The more dispersed the distribution of public space,the greater the change in microclimate effects in high-rise residential areas(increase in temperature,decreases in humidity,decrease in wind speed,better thermal comfort in autumn);when the dispersion of public space is 0.23,the temperature and environment in the residential area will change greatly.The thermal comfort of the human body is the best;the smaller the public space in the residential area,the smaller the high-rise residential area.The climate effect changes greatly(the temperature increases,the humidity decreases,the wind speed decreases,and the thermal comfort is better in autumn);the greater the angle between the public space and the dominant wind direction in spring and autumn,the change dramatically in microclimate effects in high-rise residential areas.The angle between the public space and the wind direction is vertical to improve the temperature and thermal comfort in the residential area in autumn.When the angle to the wind direction is parallel,it improves the thermal comfort of the human body in spring.Degree of influence: position> size of air inlet> area> angle with seasonal wind direction>dispersion deviation degree.From the perspective of microclimate,we are willing to put forward a certain reference for the planning and design of high-rise residential areas in Baotou in the future,improve the microclimate conditions in the residential areas,and effectively improve the thermal comfort of the human body in the residential areas.