Simulation And Optimization Of Campus Microclimate Based On ENVI-met

With the acceleration of urbanization,the increase of urban population,and the expansion of large buildings and roads,the urban form becomes more and more complicated.The changes in the nature of the underlying surface of the city by the highvolume and high-density urban built-up areas,and the pollution of the urban environment caused by carbon emissions from human activities,have aggravated the urban heat island effect.As these urban problems become increasingly prominent,the research on urban environmental problems will also become more and more important.Urban microclimate is one of the important factors that need to be considered when exploring urban environmental issues.Urban microclimate has an important impact on the lives and health of urban residents.Reasonable planning can improve the living environment and quality of life of residents.Therefore,improve and optimize urban microclimates.Climate has gradually become a hot issue in academic circles.In the past,most studies on microclimate choose areas where human activities are scattered,such as a certain block in a city.However,compared with urban blocks,the microclimate elements of a campus in an area where activities such as clothing,food,housing,and transportation are relatively concentrated.More needs to be improved.Therefore,this paper selects Henan University of Economics and Law(Zhengdong Campus)as the research area.Through the understanding and interpretation of relevant literature on microclimate research at home and abroad,based on microclimate simulation,from the perspective of geography,it is proposed to influence the microclimate through changes.The main factors of the spatial location morphology can improve or optimize the conclusion of the urban microclimate.This paper will use ENVI-met software to establish a campus model,taking plant species and plant spatial location as the main factors affecting campus microclimate.By permuting and combining different plant species and their different spatial locations,three ways to optimize campus microclimate are proposed.The three schemes are evaluated for the thermal comfort of the human body to demonstrate the feasibility of the microclimate optimization method proposed in this paper.The main work and research conclusions of the simulation of campus microclimate using ENVI-met software,the proposal of campus microclimate optimization plan and the evaluation of the optimization plan are as follows:(1)Establishment of campus model: Divide Henan University of Economics and Law(Zhengdong campus)into teaching and research area,teacher and student living area,sports leisure area and campus landscape area.First,build a model of the school building based on the size and map of the measured building.Then according to garden botany,the green belt plants of the school are divided into three categories: trees,shrubs and ground cover.Finally,the exterior wall of the building is made of concrete,the main road surface in the campus is asphalt,the secondary road surface is made of concrete,and the surface of the playground is made of plastic-like crushed bricks and stones.(2)Propose optimization schemes: through the arrangement and combination of three plant types: shrubs,trees and ground covers,three microclimate optimization schemes are proposed.Option 1: Plant shrubs in the green belt around the building,trees in the green belt on both sides of the road,and ground cover plants in the ecological green area;Option 2: Plant in the green belt around the building,and ground covers in the green belt on both sides of the road Plants,shrubs are planted in the ecological green area;Option 3: Ground cover plants are planted in the green belt around the building,shrubs are planted in the green belts on both sides of the road,and arbor plants are planted in the ecological green area.(3)Evaluation of optimization schemes: Combine the microclimate simulation results with Arc GIS buffer analysis,set up 15 m,30m,45 m,60m,and 75 m buffer zones around campus buildings,and analyze these five buffers separately The situation of PMV in the area and the situation of PMV in the integrated buffer zone will be evaluated objectively for the three options.Compare and analyze the PMV of the three schemes,and then superimpose the buffer area built around the campus building through the method of spatial analysis,and calculate the area percentage of each section of the PMV value in each buffer area,and finally come to this conclusion: When arbor plants are planted in the green belt around the building,ground cover plants are planted in the green belts on both sides of the road,and shrub plants are planted in the ecological green area,the human body comfort can be close to 0 within the range of frequent activities of teachers and students at 12 noon.The area is the largest.According to the spatial distribution of different types of plants,the microclimate is simulated,and the areas with frequent human activities are superimposed with PMV to compare and analyze the microclimate that can make people in a more comfortable environment,so as to determine the types of plants and their distribution,and make the campus greening work.The plan provides a scientific basis.