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SITE AND CLIMATE:-
• climate:- hot and humid(tropical)
• Temperature varies from 24*C to 35*C
• Humidity is always high.
BUILDING FEATURES:-
• energy savings of more than 50%.
• 6-storey// 2 basements. total area-38,606 m2.
• air conditioned area-19,237m2
• non-air conditioned area-19,369m2
• Windows:-
• Primarily oriented towards north and south.
• two types of window facades – 1. punch holes(lower)
2.curtain wall with exterior shading
louver (upper)
• 12 mm thick light green tinted glazing with visible light transmission of
65% and shading coefficient of 0.59.
• Walls :-
• 200 mm aerated concrete, (autoclave light concrete blocks).
• 2.5 ttimes better insulation.
• Extrerior surfaces have light colours
Roof:-
• 100 mm of polysterene foam insulation in comparison to 25 mm
normal.
• Second canopy roof.
• Green landscaping around perimeter.
• Rain water harvesting.
PASSIVE STRATEGIES:-
• Atrium(thermal flue).
• Glazing windows, punch-hole windows.
• Orientation.
• Zoning.
• Indoor greenery.
ACTIVE STRATEGIES:-
• Photo occupancy sensors.
• Automatic shading canvas at atrium.
• Daylight responsive control system. when daylight is sufficient to satisfy
the lighting need, which is an illumination level of 300-400 lux.
• energy efficient lights.
• energy efficient cooling system.
• Smart air regulator as per CO2 level (700-1000ppm) (0.57 m3/hour/m2).
CONCLUSIONS:-
• -- Creation of a green environment around and on top of the building.
• --Optimization of building orientation, with preference to south and north
facing windows, where solar heat is less than for other orientations.
• --Energy efficient space planning. A well insulated building façade and
building roof.
• --Protection of windows from direct sunshine and protection of the roof by
a double roof
• --Natural ventilation in the atrium Energy efficient cooling system, where
the air volume for each building zone is controlled individually according
to demand
• --Maximize use of diffuse daylight and use of high efficiency lighting,
controlled according to daylight availability and occupancy
• --Energy efficient office equipment (less electricity use and less cooling
demand )
ENERGY SAVINGS:-
• according to the new Malaysian Standard MS 1525:2001 “Code of
Practice on Energy Efficiency and use of Renewable Energy for
Nonresidential Buildings”. Following this code, the LEO building must
have an energy consumption less than 135 kWh/m2 year.
LUMEN—
THE SI UNIT OF LUMINOUS FLUX, EQUAL TO THE
AMOUNT OF LIGHT EMITTED PER SECOND IN A
UNIT SOLID ANGLE OF ONE STERADIAN FROM A
UNIFORM SOURCE OF ONE CANDELA
1 LUX = 1 LUMEN / SQ METER
CANDELA—
THE SI UNIT OF LUMINOUS INTENSITY.
DIFFUSED DAYLIGHT PRODUCES 120
LUMEN/WATT, AS COMPARED TO THE 60
LUMEN/WATT OF FLORESCENT LIGHTING.