Study On Carbon Emissions Calculation And Carbon Reduction Strategy Of Office Buildings In Cold Areas

Global warming is caused by massive emissions of anthro-pogenic greenhouse gases.Currently,countries actively participate in climate change actions in the form of “Independent National Contributions”(INDC).China implemented the “National Independence Contribution” as the administrative goal of the government through the “13th Five-Year Plan” of the country,and determined the carbon reduction target of China's carbon dioxide emissions per unit of GDP by 2030.The large scale of office buildings in the construction field,high energy consumption per unit area,rapid growth in quantity,and huge carbon emissions will become the focus of China's building energy conservation and emission reduction work.Because climate differences have a great impact on building energy consumption and carbon emissions,this paper mainly studies the carbon emission and carbon reduction strategies of office buildings in cold regions,and has positive reference significance for carbon emission quantification and carbon reduction strategies for office buildings in the same region.Numerous studies have shown that the carbon footprint of the building's planning and design phase is small,but the designer's design strategy affects carbon emissions throughout the life cycle.Quantifying life cycle carbon emissions from a typical office building can help architects accurately control the building's carbon footprint during the planning and design phase for low-carbon design.This paper takes the office buildings in the cold area as the research object,and calculates the carbon emissions of the building's life cycle based on the life cycle theory of the building.The specific research contents and results are as follows:1.This paper divides the whole life cycle of a building into three phases: materialization phase,maintenance phase,demolition and cleanup phase;combining carbon emission coefficient method with life cycle assessment theory to construct a complete calculation of building life cycle carbon emissions.model.2.Combining the characteristics of office buildings in cold regions,the typical office buildings in cold regions are selected for carbon emission calculation,and the total carbon emissions and carbon emission equivalents of the building's life cycle are obtained.The calculation results can be used to estimate the carbon emissions of the same type of office buildings.3.Through the analysis of the calculation results,a comprehensive analysis of the carbon emissions of the life cycle of the case building,the results show that the carbon emissions in the use phase is the largest,far greater than the sum of the other two phases,of which the HVAC emissions in the use phase accounted for Compared with the largest,it has a large potential for carbon reduction;followed by carbon emissions in the materialized stage,in which carbon emissions from building materials account for the largest proportion.Finally,from the architectural design level,the factors affecting the carbon emissions of the office building during its whole life cycle are summarized,and the carbon reduction strategies such as controlling the window-to-wall ratio and reasonably enhancing the insulation performance of the envelope structure are proposed for the cold-ground reinforced concrete office building,and then passed abroad.An excellent low-carbon office building case study explores the low-carbon design strategy for reference to office building design in cold regions.It is proposed that the use of renewable energy should be considered in the initial stage of design to be the most fundamental way to reduce building carbon emissions.Secondly,architects It can choose renewable building materials,set indoor and outdoor excessive space,improve the prefabricated standard design of structural components,and make full use of natural lighting to reduce the carbon emissions of buildings.