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shading coefficient

   Also found in: Acronyms 0.01 sec.
shading coefficient [′shād·iŋ ‚kō·i‚fish·ənt]
(engineering)
A ratio of the solar energy transmitted through a window to the incident solar energy; used to express the effectiveness of a shading device.

shading coefficient
The total amount of solar energy that passes through a glass relative to a ? inch (3 mm) thick clear glass under the same design conditions; includes both solar energy transmitted directly plus any absorbed solar energy subsequently re-radiated or convected into a room; lower values indicate better performance in reducing summer heat gain and therefore air-conditioning loads.


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The formula takes into account glass type, solar and visible light transmittance and reflectance, shading coefficient and the heat insulation value.
1E can use traditional inputs for windows, such as shading coefficient and normal visible transmittance, Reilly et al.
Most conventional tinted films transmit more than 65% of solar energy, giving them an unacceptable shading coefficient of over 0.
 
 
 
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