Page 59 - JCAU-5-2

Journal of Chinese
Architecture and Urbanism Cooling energy-saving mechanism

Figure 1. Building plan. Source: Drawing by the authors

Figure 2. Building elevation. Source: Drawing by the authors

Table 1. Heat transfer coefficient of envelope of four grades
Grade of envelope External wall heat transfer External window heat transfer Roof heat transfer
coefficient (W/(m2°C) coefficient (W/(m2°C) coefficient (W/(m2°C)
Lower-grade 1.9 6.18 0.93
Medium-grade 1.5 4.17 0.80
High-grade 0.80 2.5 0.50
Top-grade 0.18 1.55 0.1
Source: Ministry of Housing and Urban-Rural Development, 2012

and warm winters among China’s five climate zones, and the zones. The cooling consumption is an important
Guangzhou is a typical city with such a climate among component of the building operation consumption in the

Volume 5 Issue 2 (2023) 5 https://doi.org/10.36922/jcau.0877