Cool Roof Technology Pdf

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.

Cool roof technology pdf.

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. A cool roof transfers less heat to the building below so the building stays cooler and uses less energy for air conditioning. Today tpo makes up over 50 of the single ply market. Reduced air pollution and greenhouse gas emissions.

This article throws light on cool roof technology with a special emphasis on its suitability in the indian context. The primary intent of cool roof technology is to reduce the. Cool roofs can reduce air temperatures inside. The motive of undertaking this project cool roofs technology discusses the various technical and design considerations as applicable for a composite climate.

Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles. Commercial buildings are benefiting from cool roof savings throughout the usa even in northern climates and that is fundamentally shifting the roofing marketplace. Cool roofs is a green building technology that is especially suited to the climate of the india. It is a relatively cheap option with substantial benefits.

Initial solar reflectance. For example epdm was the most popular single ply membrane in the industry in 2003. By lowering energy use cool roofs decrease the production of associated air pollution and greenhouse gas emissions. 0 82 reduced to 0 72 after three years.

A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning. Improved human health and comfort. This paint is included in cool roof rating databases 14 15 with the following character istics. Roof reflectivity of 0 6 0 7 is optimum for london climate.

Historically cool roofs have been either white. Cool roofs is a green building technology that is especially suited to the climate of india. Highlights we studied the energy impact of a cool roof in an office building in london. Overall energy demand reduces between 1 and 8 5 relative to an albedo of 0 1.

Standard or dark roofs can reach temperatures of 150 f or more in the summer sun. A commercially available cool paint suitable for flat roofs was applied to the roof of the house in jamaica. Thermal comfort improves by 2 5 c but heating demand increases by 10. 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.