Study On The Influence Of The Courtyard Space Form On Microclimate In Lhasa

With the economic development of Lhasa,urban environment has become one of the concerns of local residents.Lhasa residents have a long time of outdoor activities,and have a high demand for outdoor comfort,including the outdoor thermal comfort.The local microclimate is not only affected by the overall climate of the city,but also by the surrounding building,landscape and underlying surface.Based on the field survey,it is found that there is a large number of courtyard space in Lhasa,which needs a comfortable thermal environment as one of the spaces for daily outdoor activities.To study the influence of courtyard space form on the microclimate,to explore the courtyard space form suitable for Lhasa is conducive to improving the uncomfortable thermal environment,and also to make suggestions for the same type of new and reconstructed buildings.Based on this,this paper consists of the following six parts:The first and second part is the study of basic theory.First of all,the research background and domestic and foreign literature are combed.Understand the results of relevant research at home and abroad,and determine the research content and methods.Secondly,based on literature reading,the paper introduces the elements of courtyard space form and microclimate,and understands the influence mechanism of form elements on microclimate.Finally,the existing outdoor microclimate evaluation indicators are understood,and the appropriate evaluation indicators are selected based on the special climate conditions of Lhasa.The third part is the field study.First,understand the distribution of the yard space in Lhasa through the network survey.Then conduct the field survey based on the network survey,get the space size of Lhasa yard through the mapping,summarize the yard space shape characteristics of Lhasa,select the appropriate location to arrange the measuring points.Finally,conduct the actual measurement at the selected measuring points,carry out the statistical analysis of the measured data,and preliminarily get the relationship between courtyard space form with microclimate.The fourth part is simulation research.First,the model of the real area is established,and the simulation results are compared with the real data to verify the applicability of the simulation software.Then,the single variable simulation study is carried out for different spatial morphological factors to understand the impact of different morphological factors on microclimate.The fifth part is the optimization of courtyard space form elements.Based on the single variable simulation results,using the orthogonal experimental design to carry on the combination simulation experiment to the courtyard space abstract model,analyzing the simulation results,integrating and refining the courtyard space form element combination based on human thermal comfort.The sixth part is conclusion and prospect.This paper summarizes the research results and shortcomings,and puts forward the prospect of future research.