Difference between micro and macro...
Transcript of Difference between micro and macro...
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Difference between micro and macro climate
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Micro-climate - The variations in localized climate around a building
Macro-climate - The climate of a larger area such as a region or a country
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•The macro and micro climate has a very important effect on both the energyperformance and environmental performance of buildings.
•The building site affects exposure to the prevailing wind, the solar radiation thebuilding receives, pollution levels, temperatures and rain penetration.
Macro climate affected by•sun angle exposure•Topography - the shape of the land•Vegetation•Water body
•Physical infrastructure •Urban layout ( land use )•Building types •Shapes, height, color •Material use in building facade•Energy demand•Open spaces•Vehicle pollution
Macro climate factors
•Temperature•Wind•Humidity•Precipitation•Sunshine•Solar radiation •Cloud cover
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Micro-Climate – Effects of Buildings
Buildings themselves create further micro-climates by shading the ground, changing wind flow patterns.
One example of how buildings affect the local climate is the heat island effect in large cities where theaverage temperature is higher than the surrounding area:
Solar energy absorbed and re-emitted from building surfaces, pavements roads etc. creates a warmingeffect on the surrounding air. Also the large quantities of buildings break up the wind flow, reducing windspeeds and causing the warm air to remain stagnant in the city. This also causes increased pollution aswell as temperatures.
The presence of local high rise buildings can degrade the local climate as wind speed at ground level canbe significantly increased, while extensive shadows block access to sunlight for long periods, increasingspace heating costs in surrounding buildings.
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Example
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Example
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Building orientation
Landscape
Roof system
Reflective surfaces
shading
Thermal mass
Building form
Building elevation
Natural ventilation
Channel landscape plantings
Cross ventilation
Water elements
Zones of natural cooling
Elevated position
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TRADITIONAL ARCHITECTURE
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BHUNGA-KUTCH.
SHAPE-SHADE-LOCAL MATERIAL
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•SELECTION OF SITE- URBAN FABRIC
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STREETS-MUTUAL SHADING-WIND
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•COURTYARD IN HOT-DRY CLIMATE
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LAYERING OF SPACE( BUFFER SPACE)
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•OPENINGS
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•EVAPORATIVE COOLING
…..WATER….
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•MODERN ARCHITECTURE
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EARTH SHELTERING, VAULT, WATER
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•WIND TOWERS
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•MODERN ARCHITECTURE
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