Arexx Pro Mode D'emploi page 53

Table 1: Typical emissivity coefficient values
Material
Aluminum, polished
Aluminum, rough surface
Aluminum, strongly oxidized
Asbestos board
Asbestos fabric
Asbestos paper
Asbestos slate
Brass, dull, tarnished
Brass, polished
Brick, common
Brick, glazed, rough
Brick, refractory, rough
Bronze, porous, rough
Bronze, polished
Carbon, purified
Cast iron, rough casting
Cast iron, polished
Charcoal, powdered
Chromium, polished
Clay, fired
Concrete
Copper, polished,
Copper, commercial burnished
Copper, oxidized
Copper, oxidized to black
Electrical tape, black plastic
Enamel **
Formica
Frozen soil
Glass
Glass, frosted
Gold, polished
Ice
Iron, hot rolled
Iron, oxidized
Iron, sheet galvanized, burnished
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Emissivity
0.05
0.07
0.25
0.96
0.78
0.94
0.96
0.22
0.03
0.85
0.85
0.94
0.55
0.10
0.80
0.81
0.21
0.96
0.10
0.91
0.54
0.01
0.07
0.65
0.88
0.95
0.90
0.93
0.93
0.92
0.96
0.02
0.97
0.77
0.74
0.23