Rui Chen, Xiaoping Feng This email address is being protected from spambots. You need JavaScript enabled to view it., Chengjing Li, Huapeng Chen 

School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China

Received: April 25, 2021
Revised: June 24, 2021
Accepted: June 24, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Chen, R., Feng, X., Li, C., Chen, H. (2021). Reduction in Carbon Dioxide Emission and Energy Saving Obtained by Renovation of Building Envelope of Existing Residential Buildings. Aerosol Air Qual. Res.


  • Building envelope renovation has great effect on energy saving and CO2 emissions.
  • The total energy saving of the optimal renovation scheme is 33.63 kWh (m2.a)1.
  • The optimal renovation scheme can reduce CO2 emissions by 86.01 tons each year.


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 (m2.a)-1 and the heating consumption is 4.22 kWh (m2.a)-1, the total energy consumption of the building is 32.59 kWh (m2.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.

Keywords: Building envelope, Energy-saving renovation, Carbon dioxide emission, Energy consumption simulation, Economical and environment benefit

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