Insulation structure of the outer surface of heat radiation and heat coefficient is integrated coefficient value, mainly affected by surface roughness, color, light level, wind speed, temperature and so on. Armstrong Rubber and Plastic foam insulation materials include carbon black in the raw materials, process control in the foam surface roughness and brightness, the reasons are exothermic coefficient is to improve the surface.
|
surface materials |
surface coefficient (W / m 2 k) |
surface features |
|
plate, aluminum foil / aluminum foil
two-sided galvanized plate
silver paint
Armstrong Rubber and Plastic foam insulation materials
adhesives and dark paint |
5.7
6.3
8.0
9.0
10.1 |
polished, glossy, smooth
bright, light-colored
metal surface
black, rough, black surface bleak
bleak |
Note: The table for the still air under the conditions of the data. Exothermic coefficient
surface thickness of the anti-Gel has a significant influence by the national standard GB11790-89 in nominal diameter greater than 1000mm pipeline or equipment insulation thickness calculation shows that:
A certain temperature, the surface heat coefficient of the higher security cold thinner layer thickness. The lower thermal conductivity, insulation thickness thinner. Recommended
Armstrong Rubber and Plastic foam insulation thickness of anti-Gel (such as 25mm) than the thickness of glass wool commonly used (such as 50mm) to thin more than one third of its surface is another main reason for the high coefficient . |
