Research On Energy Saving Reconstruction Technology Of Existing Office Buildings In Taiyuan Based On DeST Simulation

The construction energy consumption produced by the construction industry in China is especially prominent in the proportion of the total energy consumption in the society.After the implementation of energy conservation policy,the existing public buildings still have a large space for energy conservation.In public buildings,office buildings have great potential for energy conservation because of their large proportion of energy consumption and insufficient energy saving strategies.Taiyuan,as the capital city of Shanxi Province,is the representative of the new urbanization development in China.While developing urban space on a large scale,many existing office buildings built in the early 21 st century or earlier have been unable to be ignored in terms of energy consumption and meeting the demands of modern office due to their large stock.Shanxi provincial government attaches great importance to the energy saving transformation of existing office buildings.In various policies,it is clearly proposed that the treatment of existing office buildings should be strictly prevented from large-scale demolition and large-scale construction,and reasonable transformation should be carried out according to local conditions.Therefore,the research focus of this paper is to analyze the energy consumption of existing office buildings,and propose the energy saving technology of suitability in cold areas represented by Taiyuan city.This paper first expounds the purpose and significance of the research,and puts forward the typical existing office buildings in Taiyuan as the research object,aiming to analyze the existing energy consumption problems of existing buildings under the background of urbanization,and to analyze the energy consumption factors and propose the corresponding transformation technology.This part of the content through the literature survey and the actual visit survey of Taiyuan City,7 representative existing office buildings.The research content includes analyzing the current situation of building envelope structure and HVAC equipment,and then understanding the energy consumption structure and energy-saving space,which lays a foundation for the next energy saving transformation technology research.Secondly,after understanding the existing office buildings in Taiyuan,the second part of the paper is to analyze the energy consumption factors of existing office buildings,in order to get the different influence degree of each factor on the building.In the specific research method,the standard model of typical office building is established by DeST dynamic simulation software.Firstly,the single factor analysis is carried out on the main transformation parts of the envelope structure,and the degree of the influence of the specific heat transfer coefficient on the energy saving effect is obtained.Then,the paper analyzes the ten factors that influence the energy consumption of existing office buildings by SPSS software and regression analysis,and analyzes the degree and order of their influence on energy consumption.Finally,based on the previous research,the paper summarizes and summarizes the energy saving transformation objectives and transformation criteria of existing office buildings in Taiyuan,and then puts forward the specific application of various energy-saving transformation technologies and measures in the current market,and further puts forward the appropriate energy saving transformation technology strategy for this cold area city of Taiyuan.Finally,through case study,the paper designs the energy saving transformation technology scheme for specific project cases,and compares the energy saving effect before and after the transformation by using DeST software.At the same time,it analyzes the application and construction methods of energy saving technology in the specific transformation scheme,and further verifies the feasibility and scientificity of the research.This paper hopes to provide effective data support for the energy-saving transformation and development of existing office buildings in Shanxi Province through the above research,and help the decision makers,managers and relevant designers to have a more systematic understanding of the transformation of existing buildings,and hope that the energy-saving transformation and development of existing office buildings in Shanxi Province can be further developed.