Optimized cool roofs: Integrating albedo and thermal emittance with R-value
نویسندگان
چکیده
منابع مشابه
Energy savings in buildings or UHI mitigation? Comparison between green roofs and cool roofs
The intensification of the Urban Heat Island effect (UHI) is a problem that involves several fields, and new adequate solutions are required to mitigate its amplitude. The construction sector is strictly related with this phenomenon; in particular, roofs are the envelope components subject to the highest solar irradiance, hence any mitigation strategy should start from them and involve their ap...
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The solar reflectance and the thermal emittance of a roof surface are important surface properties affecting the roof temperature, which, in turn, drives the heat flow through the roof. The solar reflectance (p) determines the fraction of the solar radiation incident from all directions that is diffusely reflected by the surface. The thermal emittance (c) describes how well the surface radiates...
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In hot arid regions, cooling buildings by passive techniques is very important regarding energy saving and the need to keep clean the environment. In such areas, domed and vaulted roofs are widely used for centuries, such as in the Middle East region and central part of Iran. In this article analysis is made to explore east–west direction of wind flow around north–south vaulted roofs and flat r...
متن کاملDevelopment of Clay Tile Coatings for Steep-Sloped Cool Roofs
Most of the pitched roofs of existing buildings in Europe are covered by non-white roofing products, e.g., clay tiles. Typical, cost effective, cool roof solutions are not applicable to these buildings due to important constraints deriving from: (i) the owners of homes with roofs visible from the ground level; (ii) the regulation about the preservation of the historic architecture and the minim...
متن کاملThermal performance of non air-conditioned buildings with vaulted roofs in comparison with flat roofs
Vaulted or domed roofs have been frequently adopted by builders and architects throughout the Middle East and other hot dry areas. However, the thermal performance of such buildings under hot dry climatic conditions has rarely been quantitatively studied. In this paper, a detailed finite element model for the investigation of the thermal performance of non air-conditioned buildings with vaulted...
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ژورنال
عنوان ژورنال: Solar Energy Materials and Solar Cells
سال: 2011
ISSN: 0927-0248
DOI: 10.1016/j.solmat.2011.07.018