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.

Cool roof technology pdf.

Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles. Overall energy demand reduces between 1 and 8 5 relative to an albedo of 0 1. This paint is included in cool roof rating databases 14 15 with the following character istics. For example epdm was the most popular single ply membrane in the industry in 2003.

Cool roofs can reduce air temperatures inside. It is a relatively cheap option with substantial benefits. 0 82 reduced to 0 72 after three years. Historically cool roofs have been either white.

A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning. Roof reflectivity of 0 6 0 7 is optimum for london climate. 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. Improved human health and comfort.

Highlights we studied the energy impact of a cool roof in an office building in london. Commercial buildings are benefiting from cool roof savings throughout the usa even in northern climates and that is fundamentally shifting the roofing marketplace. It is a relatively cheap option with substantial benefits. Cool roofs is a green building technology that is especially suited to the climate of the india.

Initial solar reflectance. A commercially available cool paint suitable for flat roofs was applied to the roof of the house in jamaica. Reduced air pollution and greenhouse gas emissions. The motive of undertaking this project cool roofs technology discusses the various technical and design considerations as applicable for a composite climate.

Cool roofs is a green building technology that is especially suited to the climate of india. This article throws light on cool roof technology with a special emphasis on its suitability in the indian context. Thermal comfort improves by 2 5 c but heating demand increases by 10. By lowering energy use cool roofs decrease the production of associated air pollution and greenhouse gas emissions.

The primary intent of cool roof technology is to reduce the. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun. Cool roofs are changing the roofing industry. The study includes experiments and thermal modelling.