Research On The Optimization Of Light And Heat Performance In The Facade Renovation Of The Existing Office Building In Taigang Factory

With the rapid development of urban economy and social and cultural progress,the number of buildings continues to increase,which leads to the continuous increase of building energy consumption.In response to the concept of sustainable development and low carbon,it is necessary to improve the energy efficiency of buildings.At present,a large number of existing buildings in China are in good physical condition.However,due to the restriction of new relevant standards and functional adjustment in use and other factors,the internal functional space and external image of the original buildings cannot meet the development requirements of the new era.Moreover,compared with the new buildings,the existing buildings cause greater energy consumption in maintaining the comfort of the interior space.The quality of the light and heat environment in the interior space and the form of the facade need to be reformed urgently.In addition,the energy consumption of public buildings accounts for a great proportion in the energy consumption of urban buildings,especially office buildings.This kind of building has existed for a long time,and due to the backward material,form and construction level during construction,it has been unable to integrate into the current urban background,nor can it provide office space with excellent environmental performance.In the reconstruction practice of existing buildings that have been completed,many architects excessively pursue the facade modeling of buildings and ignore the improvement of indoor thermal comfort,and even cause the indoor thermal comfort to be reduced after the completion of the form transformation,which increases the problem of building energy consumption.This paper takes the facade reconstruction of the existing office buildings as the entry point,studies and summarizes the form reconstruction strategies in the reconstruction practice of the existing office buildings,makes an in-depth analysis on the difference of the influence of different reconstruction strategies on the indoor physical environment,and uses the multi-objective genetic algorithm to optimize the form design parameters.Based on the actual survey and analysis of the existing office building in Taigang plant,the facade reconstruction process of the existing office building based on the photothermal performance is proposed,and the facade reconstruction practice of the office building of the ironworks is completed.The research content of this paper is mainly divided into three parts: Firstly,through the research and summary of the reconstruction practice of the existing office buildings at home and abroad,the facade reconstruction strategy based on performance performance was obtained,and the status of the 22 existing office buildings in the Taigang factory was investigated,to understand the facade form and spatial characteristics of the existing office buildings,and to determine the standard unit space size,optimization objectives of photothermal performance and aesthetic requirements of the facade form.The application of relevant simulation software and optimization algorithm is introduced,the form transformation strategy is combined with the standard unit space,the photothermal performance-oriented facade transformation process of the existing office building is proposed,and the construction of the simulation platform is completed.In the second part,on the basis of the above standard units and formal transformation measures,the software simulation platform is used to conduct indepth analysis on the differences of the influences of different forms of transformation measures on indoor physical properties,and the multi-objective genetic algorithm Octopus platform is used to complete the parameter optimization design of the transformation form.The third part,through the practice of facade reconstruction of the office building of the ironworks,analyzes the photothermal performance of the original space of the office building,and introduces the actual transformation scheme.On this basis,the optimization design of two different facade styles is completed.Finally,the overall form and performance of the transformation before,actual transformation scheme,optimization design I and optimization design II are compared to verify the scientific nature and adaptability of the existing office building facade transformation process under the guidance of light and thermal performance.The research shows that the optimized design process of photothermal performance in the facade reconstruction of the existing office building proposed in this paper has good applicability in the facade reconstruction of this kind of brick-and-concrete office building with single space form and large structural restriction,and can effectively assist architects to integrate the facade form and spatial physical performance in the reconstruction process of the existing building.The novel and high performance facade reconstruction form is created,which proves the elevation effect and the effectiveness of improving the photothermal performance of the interior space of the building.