MIL-HDBK-1003/19
TABLE V. Reference design characteristics.
Glazing Properties
Transmission characteristics
diffuse
Orientation
south
Index of refraction
1.526
Extinction coefficient
0.5 in. -1
Thickness of each pane
1/8 in.
Air gap between panes
1/2 in.
Thermal Control
Room temperature
65deg.F to 75deg.F
Internal heat generation
none
Night Insulation
Thermal resistance
R-4 or R-9
In place, solar time
5:30 p.m. to 7:30 a.m.
Solar Radiation Assumptions
Shading
none
Ground diffuse reflectance
0.3
TABLE VI.
Properties of building materials (from ASHRAE Handbook and Produ
Directory, 1977 Fundamentals).
Thermal
Material
Density, [rho]
Specific Heat, c conductivity, k [r
lb/ft3
(Btu/lb-deg.F) (Btu/deg.F-ft-hr)
Magnesite Brick
158
0.22
2.20
76
Marble
162
0.21
1.50
51
Concrete (high
density reference)
150
0.20
1.00
30
Plaster
132
0.43
0.42
23
Chrome brick
200
0.17
0.67
22
Fireclay brick
112
0.20
0.58
13
Concrete (stone)
144
0.16
0.54
12
Concrete (lightweight
aggregate)
120
0.21
0.43
10
Brick, building
123
0.20
0.40
9
Adobe
0.38
6
Sand
95
0.19
0.19
3
Gypsum board
50
0.26
0.10
1
[*]Private communication from J. C. Hedstrom, Los Alamos National
Laboratory. Adobe absorbs moisture readily, and properites can
vary widely with moisture content. The thermal conductivity is
particularly sensitive.
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