Reduction in Carbon Dioxide Emission and Energy Saving Obtained by Renovation of Building Envelope of Existing Residential Buildings

Abstract

Energy and environmental issues have become increasingly prominent, and reducing energy consumption in the construction industry is a key part of solving the energy consumption and carbon dioxide emissions problem of the whole society. The existing buildings in south Jiangsu region of China have large stocks and huge energy consumption and carbon dioxide emissions.An existing residential building in south Jiangsu region of China is selected as the study object to carry out energy-saving reconstruction of its envelope. This study analyzes the energy conservation effect of each building envelope separately by energy consumption simulation software BESI; taking the static payback period as the evaluation standard, the orthogonal test method is used to analyze the economic efficiency of each combination scheme, and finally determine the optimal energy-saving and carbon dioxide emissions reduction renovation scheme.The optimal thickness of expanded polystyrene insulating board of both external wall and roof is 120 mm. The optimal specification of external window is "triple silver low-emissivity glass (5 mm) + air layer (12 mm) + normal glass (5 mm)". Results shows that the cooling capacity of the scheme is 28.37 kWh (m 2 .a) -1 and the heating consumption is 4.22 kWh (m 2 .a) -1 , the total energy consumption of the building is 32.59 kWh (m 2 .a) -1 , the static payback period is 13.76 years, and the dynamic payback period is 22.84 years. Annually, CO2 emissions could be reduced by 86.01 tons, SO2 emissions could be reduced by 2.59 tons, and NOX emissions could be reduced by 1.29 tons through the optimal renovation scheme.

The Carbon Emission Assessment of a Building with Different Prefabrication Rates in the Construction Stage

“…For example, Du et al [ 6 ] conducted comparative research on the carbon emissions of the building industry in multiple provinces of China and concluded that promoting low-carbon building technology and reducing high-carbon materials could reduce carbon emissions from the industry; Chen and Chen [ 5 ] studied the potential impact of coal substitution policy on carbon emission of the building industry in the 13th Five Year Plan period of China and concluded that the carbon emission would decline by 20 to 29%. The micro-level research [ 8 , 9 , 10 , 11 ] focuses on how to reduce carbon emissions of some specific buildings by changing materials, structures, construction mode, etc. For example, Geng et al [ 10 ] found that the carbon emissions of a building can be reduced by 0.16–2.85 t per unit using wood flooring instead of ceramic tiles; Chen et al [ 8 ] found that the CO 2 emissions of a case building can be reduced 86t per year by improving Thermal envelope.…”

“…The micro-level research [ 8 , 9 , 10 , 11 ] focuses on how to reduce carbon emissions of some specific buildings by changing materials, structures, construction mode, etc. For example, Geng et al [ 10 ] found that the carbon emissions of a building can be reduced by 0.16–2.85 t per unit using wood flooring instead of ceramic tiles; Chen et al [ 8 ] found that the CO 2 emissions of a case building can be reduced 86t per year by improving Thermal envelope. Note that this paper concerns the micro-level building carbon emission.…”

Evaluation of Thermal Resistance of External Protection During Thermal Renovation of the Building

“…The problem of thermal renovation is acute not only in Ukraine, this problem is solved with various scientific and technical approaches (Barahona, B.,2021;Fernandez-Luzuriaga, J., 2022;Li, H., 2022;Mehregan, M., 2022;Popescu, L. L., 2021) taking into account ethnic, economic and climatic features in many countries of the world (Echlouchi, K., 2022;Gonzalez-Caceres, A., 2022;Milovanovic, B., 2022;Ricci, M., 2022;Wu, H., 2022;Zhang, X., 2021). In addition to the energy-saving effect, thermal renovation measures reduce the negative impact on the environment by reducing carbon dioxide emissions into the atmosphere (Chen, R., 2021;Kalbasi, R., 2022;Nematchoua M. K., 2022).…”