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Principles of thermal insulation

Heat transfer in buildings in heat exchange performance in three ways: conduction heat + convection <25%, radiant heat >75%.
tile roof in the summer temperatures rise, a lot of radiant heat into the rooms temperatures continue to rise, working and living environment is extremely uncomfortable.
Dike aluminum foil coil solar radiation absorption coefficient (normal radiation emissivity) 0.07, radiation heat less. Is widely used in the insulation of the roof and wall.
heat spread route (not added insulation film): Sun--infrared magnetic wave--heat impact tiles makes temperature increased--tiles became heat radiation out heat--heat impact now poured roofing makes temperature increased--now poured roofing became heat radiation out heat--indoor environment temperature continued increased
heat spread route (added insulation film): Sun--infrared magnetic wave--heat impact tiles makes temperature increased--tiles became heat radiation out heat--heat impact foil makes surface temperature increased-- Extremely low emissivity of aluminum foil, radiation a few heat-the fee to maintain a comfortable temperature. BACK

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