Page 82 - JCAU-5-1

Journal of Chinese
Architecture and Urbanism Green renovation technology for rural buildings

Name of the Thermal resistance Thermal inertness Solar radiation Heat transfer
structure (R) (m k)/W index absorption coefficient coefficient
2
D=R*S W/(m K)
2
Before renovation
External walls 0.207 2.300 0.77 2.73
Roofing 0.090 1.431 0.74 3.99
After renovation
External walls 0.546 2.804 0.75 1.34
Roofing 0.973 2.983 0.75 0.88
Figure 6. Comparison of envelope structure and thermal performance indicators before and after renovation. Source: Drawing by the author.

The area of natural light coefficient 2.0% of the dining room, is sufficient after the renovation, while
residential building before the renovation is large, the distribution of light is more even.
and the indoor light is dim, while the natural light (iii) The heat insulation performance of the envelope
coefficient of the public space, such as living room and structure is obviously improved

Volume 5 Issue 1 (2023) 9 https://doi.org/10.36922/jcau.404