Cool roofs are changing the roofing industry.
Cool roof technology pdf.
This article throws light on cool roof technology with a special emphasis on its suitability in the indian context.
Cool roofs can reduce air temperatures inside.
The primary intent of cool roof technology is to reduce the.
Cool roofs is a green building technology that is especially suited to the climate of the india.
The study includes experiments and thermal modelling.
Historically cool roofs have been either white.
It is a relatively cheap option with substantial benefits.
Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.
A cool roof transfers less heat to the building below so the building stays cooler and uses less energy for air conditioning.
Roof reflectivity of 0 6 0 7 is optimum for london climate.
For example epdm was the most popular single ply membrane in the industry in 2003.
A conventional dark roof absorbs most sunlight increasing solar reflectance reduces solar heat gain lowers roof temperature high thermal emittance facilitates radiative cooling helps keep roof temperature low lowering roof temperature can reduce building cooling electricity use peak power demand 4 ambient air temperature.
Yet you may not be familiar with what exactly the term means so let s give you a quick primer on cool roof technology with a special emphasis on its suitability in the indian context.
Highlights we studied the energy impact of a cool roof in an office building in london.
A commercially available cool paint suitable for flat roofs was applied to the roof of the house in jamaica.
This paint is included in cool roof rating databases 14 15 with the following character istics.
Standard or dark roofs can reach temperatures of 150 f or more in the summer sun.
A cool roof is a roofing system that delivers higher solar reflectance the ability to reflect the visible infrared and ultraviolet wavelengths of the sun reducing heat transfer to the building and higher thermal emittance the ability to radiate absorbed or non reflected solar energy than standard designed roofing products.
It is a relatively cheap option with substantial benefits.
Overall energy demand reduces between 1 and 8 5 relative to an albedo of 0 1.
Commercial buildings are benefiting from cool roof savings throughout the usa even in northern climates and that is fundamentally shifting the roofing marketplace.
Reduced air pollution and greenhouse gas emissions.
A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning.
By lowering energy use cool roofs decrease the production of associated air pollution and greenhouse gas emissions.
Cool roofs is a green building technology that is especially suited to the climate of india.
Initial solar reflectance.
Improved human health and comfort.
Thermal comfort improves by 2 5 c but heating demand increases by 10.
