Research on Energy-Saving Design of Rural Building Wall in Qinba Mountains Based on Uniform Radiation Field
Table 6
The construction modes and thermal parameters of energy-saving wall.
Name
Project
Material
Thickness (mm)
Thermal conductivity (W/(m·K))
Dry density (kg/m3)
Heat transfer coefficient (W/(m2·k))
Category I
South wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.9
Solid clay brick
240
0.81
1900
EPS
28
0.041
18
East wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.8
Solid clay brick
240
0.81
1900
EPS
34
0.041
18
West wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.85
Solid clay brick
240
0.81
1900
EPS
31
0.041
18
North wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.8
Solid clay brick
240
0.81
1900
EPS
34
0.041
18
Category II
South wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.9
Lime sand brick
240
1.100
1900
EPS
31
0.041
25
East wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.8
Lime sand brick
240
1.100
1900
EPS
38
0.041
25
West wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.85
Lime sand brick
240
1.100
1900
EPS
34
0.030
25
North wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.8
Lime sand brick
240
1.100
1900
EPS
38
0.041
25
Category III
South wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.9
KP1 porous brick
240
0.58
1600
EPS
23
0.041
18
East wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.8
KP1 porous brick
240
0.58
1600
EPS
29
0.041
18
West wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.85
KP1 porous brick
240
0.58
1600
EPS
26
0.041
18
North wall
Cement mortar (internal and external)
20 + 20
0.93
1800
0.8
KP1 porous brick
240
0.58
1600
EPS
29
0.041
18
Note. According to the literature [71], the heat transfer resistance for the inner surface of the wall is 0.11 (m2·k)/W. The heat transfer resistance of the inner surface of the wall is 0.04 (m2·k)/W, and the thermal conductivity correction coefficient of the insulation layer is 1.1.
