Thermal performance of a Concrete Cool Roof under different climatic conditions of Mexico

Hernández-Pérez, I.; Álvarez, G.; Gilbert, H.; Xamán, J.; Chávez, Y.; Shah, B.

doi:10.1016/j.egypro.2014.10.164

Thermal performance of a Concrete Cool Roof under different climatic conditions of Mexico

Journal Article · Thu Nov 27 00:00:00 EST 2014 · Energy Procedia (Online)

DOI:https://doi.org/10.1016/j.egypro.2014.10.164· OSTI ID:1207936

Hernández-Pérez, I. ^[1]; Álvarez, G. ^[1]; Gilbert, H. ^[2]; Xamán, J. ^[1]; Chávez, Y. ^[1]; Shah, B. ^[3]

Centro Nacional de Investigación y Desarrollo Tecnológico, CENIDET-DGEST-SEP, Morelos (Mexico)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
WinBuild, Inc., Fairfax, VA (United States)

A cool roof is an ordinary roof with a reflective coating on the exterior surface which has a high solar reflectance and high thermal emittance. These properties let the roof keep a lower temperature than a standard roof under the same conditions. In this work, the thermal performance of a concrete roof with and without insulation and with two colors has been analyzed using the finite volume method. The boundary conditions of the external roof surface were taken from hourly averaged climatic data of four cities. For the internal surface, it is considered that the building is air-conditioned and the inside air has a constant temperature. The interior surface temperature and the heat flux rates into the roofs were obtained for two consecutive days in order to assess the benefits of a cool roofs in different climates.

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: Consejo Nacional de Ciencia y Tecnología (CONACYT), Morelos (Mexico); USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1207936

Journal Information:: Energy Procedia (Online), Journal Name: Energy Procedia (Online) Journal Issue: C Vol. 57; ISSN 1876-6102

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (7)

Properties and performance of advanced reflective paints to reduce the cooling loads in buildings and mitigate the heat island effect in urban areas Zinzi, M.; Fasano, G. International Journal of Sustainable Energy, Vol. 28, Issue 1-3 https://doi.org/10.1080/14786450802453314	journal	September 2009
Roof solar reflectance and cooling energy use: field research results from Florida Parker, Danny S.; Barkaszi, Stephen F. Energy and Buildings, Vol. 25, Issue 2 https://doi.org/10.1016/S0378-7788(96)01000-6	journal	January 1997
The effects of roof albedo modification on cooling loads of scale model residences in Tucson, Arizona Simpson, J. R.; McPherson, E. G. Energy and Buildings, Vol. 25, Issue 2 https://doi.org/10.1016/S0378-7788(96)01002-X	journal	January 1997
Measurement of albedo and analysis of its influence the surface temperature of building roof materials Prado, Racine Tadeu Araújo; Ferreira, Fabiana Lourenço Energy and Buildings, Vol. 37, Issue 4 https://doi.org/10.1016/j.enbuild.2004.03.009	journal	April 2005
Effects of coefficients of solar reflectivity and infrared emissivity on the temperature and heat flux of horizontal flat roofs of artificially conditioned nonresidential buildings de Brito Filho, J. P.; Henriquez, J. R.; Dutra, J. C. C. Energy and Buildings, Vol. 43, Issue 2-3 https://doi.org/10.1016/j.enbuild.2010.10.007	journal	February 2011
Performance of antisolar insulated roof system Ahmad, Irshad Renewable Energy, Vol. 35, Issue 1 https://doi.org/10.1016/j.renene.2009.07.022	journal	January 2010
Analytical Solution for Heat Conduction in a Two-Material-Layer Slab With Linearly Temperature Dependent Conductivity Chang, K. C.; Payne, U. J. Journal of Heat Transfer, Vol. 113, Issue 1 https://doi.org/10.1115/1.2910531	journal	February 1991

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Related Subjects

36 MATERIALS SCIENCE
cool roof
heat flux
reflective coating
surface temperature

Thermal performance of a Concrete Cool Roof under different climatic conditions of Mexico

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References (7)

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