malaysia

MEWC LOW ENERGY OFFICE

BUILDING

Designed by SNO architects

SITE AND CLIMATE:-

• climate:- hot and humid(tropical)

• Temperature varies from 24*C to 35*C

• Humidity is always high.

COMFORT SCALE:-

• Recommended indoor temperature 23*C to 26*C

• Relative humidity should be 60-70%.

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.

------THANK YOU

-- kumar snehansu

--10110029

--b.arch IInd year