SHADING IMPACT

Shading Issues:- 

u To avoid the likely problems of glare, excessive brightness ratio and thermal discomfort, internal shading devices were used in the perimeter zones.

u These devices would operate when the total solar-irradiance incident on the windows exceeded 200 W/m^2, the threshold beyond which direct sunlight might cause glare and other undesirable visual effects

u The internal shading devices (when in operation) reduced the shading coefficient (SC), light transmittance (LT) and U-value of the glazing system by 75%, 65% and 15%, respectively.

u For day lighting simulation, top-up controls were used for regulating the electric lighting installed at the four perimeter zones in response to the available daylight

Daylight levels were determined at one reference point in each perimeter office at a working plane 0.75 m above the finished floor-level and at a depth of 2.5 m centered with respect to the window