Analysis on energy saving and carbon emission of residential building structures in cold zones--Taking a residential house in Lanzhou as an example
The rural construction volume is large and relatively scattered,involving many factors.The carbon emissions of rural buildings are relatively high,which is one of the main factors of the construction industry to achieve carbon peak and carbon neutrality.The traditional construction method requires a large amount of materials,and the carbon emission of the production and transportation of materials is about 366.72kgCO2e/m2.The heat transfer coefficient of the building wall is 1.14W/(m2·K),which is far higher than the requirements of energy-saving design standards,and the thermal performance is poor.By optimizing the construction method of thermal insulation structure through external wall insulation,roof insulation,window upgrading,the construction cost increases by 195.5yuan/m2,the carbon emissions of the production and transportation of the materials used are 349.67kgCO2e,and the carbon reduction per unit building area is 17.05kgCO2e/m2.The incremental cost of carbon reduction benefit is 870kgCO2e/10000yuan.The heat transfer coefficient of building envelope is 0.45W/(m2·K),which is much better than the requirements of energy-saving design standards.The building energy efficiency improvement rate reaches 58%,and the heat consumption index reaches 10.0W/m2.It also lays a foundation for the application of non-carbon-based new energy in the next step to further reduce the carbon emissions of building operation process.
carbon emissionrural housingbuilding energy savingembodied carbon
万方数据
