the technology behind ‘cool’ roofs. specialized pigments pigments are colored powders...
TRANSCRIPT
specialized pigmentsPigments are
colored powdersIncorporated into paint,
plastics, concrete, ceramics…
Applied on or formed into
various materials
Imparting a wide range of colored
effects…
Ceramic chemistry = ‘Tough’
Kiln-fired at temperatures exceeding 1000 ºC, Arctic pigments are essentially
synthetic minerals
Oxide raw materials are fused into a single crystalline color
Ceramic chemistry = ‘Tough’
This chemical structure provides the ultimate resistance to sunlight, chemicals, and heat
as demonstrated by…
Roof
Conduction: Heat transferred
into building
Sunlight
Reflection1. Reflection2. Conduction3. Emission4. Convection
Convection: Heat transferred to air in and around building
Emission: Heat radiated
as long wavelength IR
Roof
Sunlight
Conduction and Convection draw heat from the Sun into the building or home, increasing cooling costs.
Conduction
Reflection
Convection
Roof
Sunlight
Conduction and Convection draw heat from the Sun into the building or home, increasing cooling costs.
pigments minimize conduction and convection, by Increasing Reflection!
Conduction
Reflection
Convection
Roof
Sunlight
Conduction
Reflection
Convection
Conduction and Convection draw heat from the Sun into the building or home, increasing cooling costs.
pigments minimize conduction and convection, by Increasing Reflection!
How do Arctic Pigments increase reflection without sacrificing color?
By selectively reflecting infrared light!
Of the Sunlight that reaches the Earth…
Visible400-700nm
Infrared700-2500nm
UV<400nm
4%
46% 50%
…only 46% is Visible to the human eye.
This 46% is responsible for a
Roof’s ColorColor.
Solar Spectrum
UV 4%
Visible 46%
IR 50%
Sunlight295-2500nm
Roof
Conventional pigments, used to make dark colors, reflect little energy in the
invisible Infrared region.
Sunlight
UV
Visible
IR
Dark ColorLow IR ReflectanceHigh Heat Build-up
Roof
Hot Roof !!!
Conventional pigments, used to make dark colors, reflect little energy in the
invisible Infrared region.
Sunlight
Roof
Dark Colors, which absorb the sun’s energy in the visible region, can be
cool…
UV
Visible
IR
Sunlight
Roof
Dark Colors, which absorb the sun’s energy in the visible region, can be
cool…
…IF they reflect the sun’s energy in the
infrared region.UV
Visible
IR
Sunlight
Dark ColorHigh IR ReflectanceLow Heat Build-up
Roof
Dark Colors, which absorb the sun’s energy in the visible region, can be
cool…
Cooler Roof !!!Cooler Roof !!!
…IF they reflect the sun’s energy in the
infrared region.UV
VisibleIR
The same visible color:
The Arctic formulation reflects the infrared light, which makes the surface (and interior spaces) cooler.
Can look very different to an infrared camera:
Standard Arctic
By using
1972 1978 1993
Our cities are growing hotter, as seen in these satellite photos.
Atlanta from space (darker is hotter)
This phenomenon is known as
Urban Heat Island
Roof
Sunlight
Convection and Emission warm the surrounding air, day and night, from heat stored in the roof.
Reflection
Convection
Emission
Roof
Sunlight
Convection and Emission warm the surrounding air, day and night, from heat stored in the roof.
pigments minimize convection and emission by Increasing Reflection!
Reflection
Convection
Emission
Roof
Sunlight
Reflection
Convection
Convection and Emission warm the surrounding air, day and night, from heat stored in the roof.
pigments minimize convection and emission by Increasing Reflection!
Emission