Research On Incremental Cost And Carbon Reduction Benefit Of Green Building Carbon Reduction Technology

In order to deal with the global climate problem,China put forward the goal of "carbon peaking and carbon neutrality" at the 75 th session of the United Nations General Assembly.The action task of "reaching the peak" and taking "green and low-carbon development" as an important goal and task.As my country’s "big household" of carbon emissions,the construction industry accounts for more than 50% of the total carbon emissions of the whole society.In order to achieve the "double carbon" goal,the construction industry must transform to low carbon,and green buildings are an effective way for the construction industry to achieve the double carbon goal.However,studies have shown that the incremental cost of green buildings restricts the popularization and development of green buildings,and my country’s current "Green Building Evaluation Standards" still lack quantitative evaluation indicators for green building carbon emission reduction,and there are green building carbon reduction The problem that the effect is not intuitive enough has led to the current promotion of green buildings mainly relying on "government leadership and policy incentives".Therefore,in order to promote the sustainable development of green buildings,it is necessary to study the incremental costs and carbon reduction benefits of green building carbon reduction technologies.First of all,this paper reviews the research status and basic theories related to green buildings and carbon emissions at home and abroad,deeply analyzes the specific terms of the "Green Building Evaluation Standards",identifies and refines relevant carbon reduction technologies,and combines the "Building Carbon Emission Calculation Standards" Given the scope of carbon emission accounting,a green building carbon reduction technology system with five stages,ten types of carbon reduction methods,and twenty-one carbon reduction technologies has been established.Emission reduction strategies and priorities at each stage of the building life cycle.Then,based on the carbon reduction technology system,the components of incremental cost are identified,an incremental cost estimation model is established,and a green building carbon emission accounting model is established by using the emission factor method.In order to further promote the transformation of green building construction to market-oriented behavior,this paper also puts forward the concept of evaluating the carbon reduction economy of green buildings.Combining with the background of the carbon trading market,the carbon reduction benefit quantification formula and the carbon reduction economics of green buildings are given.The evaluation method,through the establishment of an accounting model,can realize the quantitative analysis of the carbon reduction function of green buildings,and can more intuitively and objectively reflect the economic effects of green building carbon reduction technologies.Finally,using the established accounting model,the carbon emissions at each stage of the life cycle of a two-star green public building are calculated.It is calculated that compared with traditional non-green buildings,the green building will generate an incremental cost of706,600 yuan,reduce carbon dioxide emissions by 29,995.64 tons in the whole life cycle,and obtain economic benefits of 21,678,800 yuan through carbon rights trading and building energy conservation.The incremental benefit-cost ratio is 30.68.On the whole,the green building has good carbon reduction economy.Then combined with the case study,the carbon reduction effect and economic degree of the thirteen carbon reduction technologies were further analyzed,and they were divided into three scenarios for discussion,providing decision-making reference for investors and promoting the promotion and application of carbon reduction technologies.This paper verifies the economic feasibility of green buildings in terms of carbon reduction through quantitative research on the carbon reduction capacity of green buildings.From the perspective of carbon reduction,investing in green buildings is more cost-effective than ordinary buildings,and has certain practical and positive significance for the development and promotion of green buildings.