Research On Urban Geothermal Comfort Improvement Strategy Based On ENVI-met

In recent years,with the continuous advancement of urbanization in China,the urban landscape pattern has been transformed by more intensive human activities,resulting in the imbalance of urban ecology and the worsening of microclimate.For this reason,scholars from all over the world are paying more and more attention to the research on microclimate and outdoor thermal comfort,and the development ideas of city construction in accordance with climate adaptability are becoming clearer.As an indispensable public green space and open space for residents' outdoor activities,city park has a complex surface structure that produces a specific microclimate environment,which has a great effect on the thermal comfort of outdoor space.Based on field measurement and ENVI-met software on the basis of numerical simulation,based on the internal space of the city park green space thermal comfort research,explore the city park green space layout and components to adjust the urban thermal environment effect,try to summarize and put forward improving strategies of city park green space thermal comfort,for similar scale and climate under the background of city park green space planning and design and optimization of the transformation to provide certain reference and basis.Firstly,the thesis systematically expounds the background and significance of the topic,summarizes and reviews the research progress at home and abroad,defines the relevant concepts of microclimate and thermal comfort,and summarizes the available theories as the theoretical support of the research.Secondly,taking longtang park of baoding city as the research object,typical meteorological days of four seasons were selected.On the basis of field measurement and numerical simulation of ENVI-met software,the simulation data were compared with the measured data,and two indexes of RMSE and MAPE were used to verify the accuracy of ENVI-met model.Then,according to the simulation results comparison of the differences space microclimate and PMV thermal comfort,and from the water form,the form of the terrain,plants and surround close form,space,the shop is form and space layout and so on to analyze the causes of differences,the measured initial mining field microclimate factors,the quantitative relationship between landscape architecture elements,try to summarize the improvement of the city park green space thermal comfort.Finally,based on the strategy proposed in the paper,the site with prominent thermal environment problems in longtan park,baoding city,was optimized and designed,and the thermal comfort improvement effect of the optimization scheme was verified by ENVI-met.Based on the above research papers,the following research results are finally obtained:(1)the verification of the software simulation results and the measured results shows that the model can better reflect the micro-climate change in the simulation area,and the application of the software is helpful to evaluate and judge the credibility of the subsequent optimization schemes and strategies.(2)based on the intuitive data obtained from the simulation results of ENVI-met,the improvement strategies for the thermal comfort of urban park green space were proposed from the aspects of plants,pavement,topography,water,sketches and spatial layout of various garden landscape elements.(3)through the verification of the optimization scheme of longtan park by ENVI-met,it can be found that the optimization scheme can effectively improve the thermal comfort of longtan park to some extent,and it also proves that the improvement strategy of the thermal comfort of urban park green space proposed in this paper has certain reference value.