Research on Energy-Saving Design of Rural Building Wall in Qinba Mountains Based on Uniform Radiation Field

Table 4

Basic structural parameters of the representative rural buildings in Ankang area.

Building height (m)	Heat transfer coefficient (W/(m^2·k))			Surface area of the building envelope (m^2)							Building volume (m^3)
	External wall	Partition wall	Roof	South		East-west	North		Door	Roof/Floor
				Window	Wall	Wall	Window	Wall
3.3	2.04	3.11	3.70	12.87	12.85	27.72	—	—	3.78	99.58	365.90
				—	—		13.07	30.49

Note. The external window is a plastic single-frame double glass window (4 + 12A + 4), and the heat transfer coefficient is 2.2 W/(m2·°C) [61]. The external door is an aluminum alloy energy-saving door with a heat transfer coefficient of 2.5 W/(m²·°C) [61].