Utilize este identificador para referenciar este registo: http://hdl.handle.net/10362/15424
Título: Evaporation from porous building materials and its cooling potential
Autor: Gonçalves, Teresa
Brito, Vânia
Vidigal, Filipa
Matias, Luís
Faria, Paulina
Palavras-chave: Porous media
Surface roughness
Fractals
Evaporation
Cooling
Data: Ago-2015
Editora: American Society of Civil Engineers
Resumo: Evaporative cooling is a traditional strategy to improve summer comfort, which has gained renewed relevance in the context of the transition to a greener economy. Here, the potential for evaporative cooling of two common porous building materials, natural stone and ceramic brick, was evaluated. The work has relevance also to the protection of built heritage becauseevaporation underlies the problems of dampness and salt crystallization, which are so harmful and frequent in this heritage. It was observed that the drying rate of the materials is, in some cases, higher than the evaporation rate of a free water surface. Surface area measurements by a three-dimensional optical technique suggested, as probable cause of this behavior, that surface irregularity gives rise to a large effective surface of evaporation in the material. Surface temperature measurements by infrared were performed afterward during evaporation experiments outside during a hot summer day in Lisbon. Their results indicate that ordinary building materials can be very efficient evaporative media and, thus, may help in achieving higher energy efficiency while maintaining a simultaneous constructive or architectural function.
Peer review: yes
URI: http://hdl.handle.net/10362/15424
DOI: 10.1061/(ASCE)MT.1943-5533.0001174.
ISSN: 0899-1561/04014222(10)
Versão do Editor: http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29MT.1943-5533.0001174
Aparece nas colecções:FCT: DEC - Artigos em revista internacional com arbitragem científica

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RI_Goncalves et al_Evaporation porous building materials cooling potential_JMCE 2015.pdf4,79 MBAdobe PDFVer/Abrir


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