Study On The Coupling Mechanism Of Urban Morphology And Energy Performance And Optimization In Regions With Hot Summer And Cold Winter

Along with the rapid development of new urbanization,population and industry continue to gather to large cities,resulting in the continuous growth of urban built-up area,and urban energy consumption(hereinafter referred to as energy consumption)has become a social issues of common concern.With the energy-driven urban design as the starting point,and the energy performance as the guide,this paper pays attention to the interaction mechanism between the building energy consumption and the urban built-up environment,and promotes the sustainable development of the city.Based on the latest research results of building energy saving on urban scale in foreign countries,this paper takes the meso-scale urban form(the building group at the urban block level)in hot summer and cold winter as the research object,constructs a three-dimensional model of urban building energy consumption information,and integrates the technical method of quantitative analysis to provide scientific basis for improving energy performance through the optimization of urban form.First,based on the principles of urban morphology,urban climatology and building thermal engineering,this paper introduces the main morphological driving factors of coupling of urban form and energy performance,such as urban density,urban texture and building type,analyzes the influence and action mechanism of urban form on building energy consumption through microclimate regulation,and tries to refine some principles and strategies of urban morphology optimization and energy performance improvement which adapt to the climate characteristics of areas with hot summer and cold winter.Next,based on the energy-driven meso-scale urban design concept,the corresponding urban shape optimization design method is proposed in this paper.In this paper,Rhino Grasshopper automatic modeling platform and Ladybug Honeybee performance analysis software are selected as technical tools,which mainly cover the following four stages of design flow: data acquisition and analysis,energy consumption model construction and verification,form optimization and the comparison and selection of the final scheme.Finally,with Sipailou Campus of Southeast University as a sample,the feasibility and effectiveness of the method flow are tested in practice.The specific experimental process is as follows:(1)Carry out the field investigation,analysis and simplification to all kinds of data in the region;(2)Integrate all kinds of information data,construct the campus energy consumption model,and check it with the measured energy consumption data;(3)Select the building spacing coefficient and vertical layout form as the key driving factors of urban density and urban texture respectively,generate 12 groups of optimization schemes under the premise of changing the building layout,and simulate the microclimate environment one by one.(4)Carry out the multi-dimensional comparison,the visual evaluation and correlation analysis,evaluate the influence and the action mechanism of such two morphological driving factors as the building spacing coefficient and the vertical layout form,on the urban building energy consumption;(5)Through the comparison of multiple schemes,select the south-high and north-low layout form with building spacing coefficient of 0.8 as the optimal scheme,and sum up a series of methods and strategies for urban morphology optimization and energy performance improvement.In conclusion,this paper preliminarily explores the research framework and technical path of urban form energy saving optimization,effectively improves the accuracy and efficiency of analysis in the early planning and design stage,and promotes the application of building information model in urban scale.It enriches the digital research of building energy saving design at the urban level and realizes multi-disciplinary intersection and cooperation.