Table 9 Thermal parameters of roof.

From: Study on indoor thermal environment and energy consumption of traditional dwellings of ethnic minorities in Sichuan plateau

Materials and parameters

Thickness

(mm)

Thermal conductivity

(W/m2·K)

Specific heat capacity

(J/kg·K)

Dry density

(kg/m3)

Thermal resistance

(m2·K/W)

Cement mortar

20

0.93

1050

1800

0.02

Asphalt malthoid

50

0.17

1470

600

0.29

Extruded polystyrene sheet (XPS)

180

0.03

1380

35

6

Cement mortar

20

0.93

1050

1800

0.02

Reinforced concrete

150

1.74

920

2500

0.09

Total thermal resistance

  

6.57 m2·K/W

  

Heat transfer coefficient

  

0.152 W/(m2·K)

  
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