Research On Carbon Emission Calculation And Emission Reduction Strategies Of Building Based On Life Cycle Assessment

Global warming caused by greenhouse gas (GHG) emission has become acommon concern to the international community. Constraction industry, whoseactivities are the main source of the greenhouse gas, has been such a famous con-tributor to global warming. The basis of the greenhouse gas which accounted forabout80%is carbon dioxide. With the economic development in China, the con-struction quantity is becoming lager and larger, which unavoidably consumes moreenergy and produces more greenhour gases during its operation and usage. As a result,reducing carbon emission of buildings becomes so important a part for energyconservation and emission reduction in China.First and foremost, based on the life cycle assessment (LCA), the paper dividedthe construction of full life cycle into planning and design, buliding materialsproduction, construction, maintenance, demolition. The source of life cycle carbonemissions was put forward in line with condition of different phases of building inChina. By analyzing a number of literature reviews at home and abroad and doinganalysis and calculation, the factors of the carbon emission factor of fossil energy,electric power and the main building materials are well defined in the paper. Throughthe data analysis which affects carbon emissions of each stage, the paper sets up adata list, including the amount and type of building materials, mechanical machine-team dosage, and energy consumption on maintenance stage. On the basis of invent-tory analysis data and carbon emission factors, the whole life cycle of building carbonemissions calculation model is therefore established. Secondly, the third building ofGaohua low-rent housing in Shijiazhuang was seleted as an example and the lifecycle carbon emission of it was accounted by the model. Then the volume andproportion of the life cycle carbon emission could be clear with the help of the model.At the same time, the variation of life cycle carbon emission was analyzed by meansof changing the thickness of insulating layer, service life etc. The changes andreduction rate of the life cycle carbon emission could be found. Finally, according to the analysis results, various kinds of emission reduction measures and the reductionpotential are also discussed in the paper.To sum up, the results of the paper can be directly used to calculate energyconsumption and carbon dioxide emission of a single building, and can be consideredas reference when estimating buildings of different types. Furthermore, the paper alsoprovides effective suggestions in choosing appropriate energy saving and carbondioxide reduction strategy. Besides, the paper will also be a guide both in theory andin practice for energy conservation and emissions reduction of engineering projects,which is very helpful in policy-making related.