Greening’s Effect On Outdoor Thermal Environment Of Residentialarea By Numerical Simulation

In recent years,many city residential areas develop with "three highs" model. Urban heat island effect is more and more significant, and the thermal environment of the people’s life become worse and worse. At the same time,residential area and residential green space area is expanding rapidly,which makes residential green space become an important part of urban green space system,and also plays an important role on the urban thermal environment regulation. Creating a good residential thermal environment become important condition to promote urban living quality and improve human comfort.The measurement method and the numerical simulation method is combined in this paper,and also the qualitative description and quantitative research.Which of them reveal the mechanism of different greening modes,and provide guide for the residential area landscape design. The author carried out the study of the following:Collecting information through the survey of residential area,to provide basic conditions for the accurate model and correction. Through the monitoring of the micro climate, summarizes the laws of the various factors change with time.And provide accurate information and the initial conditions for numerical simulation.Studies have shown that architectural layout,underlying surface structure, vegetation types will influence of thermal environmentModify the software database according to the climate characteristics and commonly used plant species in shenzhen. At the same time,according to the measured data to check the results,and constantly adjust parameter Settings, make the scope of the simulation results meet the requirements of research institute eventually. The software Envi- met which was adapted can accurately describe the change rule of each factor, and to achieve the requirement of absolute value.On the basis of this,analyze the research object from multiple perspectives and get the related conclusion.Using the research process and methods above-mentioned, to evaluate the different greening situation of outdoor thermal environment. Compare the air temperature,relative humidity, wind speed,the average radiation temperature value and SET of different scenarios. Determine the differences between different greening configuration mode. Joe-fill-grass is the best on human body thermal comfort. Grass and irrigation-grass even have side effects at some point. In addition,in the choice of plant species,the greater the value of leaf area index is the better the thermal environment is.