Research On The Block Form Optimization Of Old Blocks In Jinan Commercial Port District Based On Microclimate Simulation

Jinan commercial port area was one of the first batch of "self-opening commercial ports" in the late Qing Dynasty,bearing the history of Jinan’s century-old urban development and having important historical and cultural value.However,with the development of the city and the transformation of the social structure,the infrastructure is backward and the economic vitality is declining.It is urgent to protect and update it through appropriate measures and strategies to maintain its development vitality.However,the current urban renewal model mainly focuses on the protection of historical features and urban infrastructure renewal,lack of research on the internal wind and thermal environment of the block,and the population in the commercial port area is dense,improving the comfort of residents’ living environment is crucial to the development of the commercial port area.Vitality is especially important.The current development of microclimate simulation tools provides a tool basis for analyzing and optimizing the wind and thermal environment inside the block.Based on the microclimate simulation analysis of various types of spaces in the old blocks of Jinan Commercial Port District,this thesis looks for the microclimate problems existing in various types of spaces,and explores the relationship between microclimate and block shape,in order to propose ways to improve the old block form.The method of microclimate inside the old block,thereby improving the environmental quality.Based on the review of microclimate related theories,the relationship between microclimate and thermal comfort is summarized,and microclimate related evaluation elements and block shape parameters are selected for analysis.At the same time,the commonly used microclimate simulation related tools are also discussed,ENVI-met is selected as the simulation software,and the accuracy of the simulation is verified.Then,an in-depth investigation was conducted on the old blocks in the commercial port area,and the spatial types in the commercial port area were summarized as low-rise enclosed layout,multi-layer determinant layout,multilayer enclosed layout,multi-layer mixed type and low-level multi-layer mixed type layout,and select two typical plots for each space type to simulate the microclimate,and analyze the changes and spatial distribution characteristics of temperature,humidity,average radiant temperature,wind speed and physiological equivalent temperature in each plot.Based on software simulation data,SPSS is used to analyze the relationship between temperature,humidity,average radiant temperature,wind speed and physiological equivalent temperature of comfort evaluation index,as well as the relationship between building density,building volume ratio and other factors and microclimate evaluation elements.The analysis results show that there is a highly negative correlation between wind speed and physiological equivalent temperature.Improving wind speed can significantly reduce the physiological equivalence problem of pedestrian planes inside the block and improve comfort.In addition,building density is closely related to microclimate evaluation factors.Building density is negatively correlated with average radiant temperature and wind speed,and positively correlated with physiological equivalent temperature.The greater the building density,the worse the thermal comfort.Based on the simulation results of typical plots,the microclimate problems in five spatial forms within the old block were analyzed.Combined with relevant upper level planning,the overall optimization principles for the old block in Jinan Commercial Port District were proposed.In response to the microclimate problems within the block,corresponding update and renovation strategies were proposed in terms of cluster optimization and architectural design.