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Initial buoyancy reduction in exhausting smoke with solar chimney design / C. L. Chow in Journal of heat transfer, Vol. 132 N° 1 (Janvier 2010) 

Public ISBD [article]  in Journal of heat transfer > Vol. 132 N° 1 (Janvier 2010) . - pp. [014502-1/3] Titre : Initial buoyancy reduction in exhausting smoke with solar chimney design Type de document : texte imprimé Auteurs : C. L. Chow, Auteur ; W. K. Chow, Auteur Article en page(s) : pp. [014502-1/3] Note générale : Physique Langues : Anglais (eng) Mots-clés : Full-scale  burning  test  Glass  solar  chimney  Buoyancy  Smoke  exhaust Index. décimale : 536 Chaleur. Thermodynamique Résumé : A possible problem in using solar chimney as a natural smoke exhaust system will be identified in this paper. Smoke generated in a fire might not be removed effectively if the glazing walls are heated up due to exposure to solar radiation. It is because the buoyancy of the smoke is reduced initially in the solar chimney. This phenomenon of reducing buoyancy will be discussed. A simple equation of motion on smoke movement was set up. Some of the results of full-scale burning experiments carried out earlier for assessing the fire response of a glass façade system were applied to support the argument. Experiments indicated that smoke would take a longer time to move up when the glazing wall temperature is higher. A better smoke exhaust design accounting the reduction in buoyancy at this early stage of a fire should be worked out. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Initial buoyancy reduction in exhausting smoke with solar chimney design [texte imprimé] / C. L. Chow, Auteur ; W. K. Chow, Auteur . - pp. [014502-1/3]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 132 N° 1 (Janvier 2010) . - pp. [014502-1/3] Mots-clés : Full-scale  burning  test  Glass  solar  chimney  Buoyancy  Smoke  exhaust Index. décimale : 536 Chaleur. Thermodynamique Résumé : A possible problem in using solar chimney as a natural smoke exhaust system will be identified in this paper. Smoke generated in a fire might not be removed effectively if the glazing walls are heated up due to exposure to solar radiation. It is because the buoyancy of the smoke is reduced initially in the solar chimney. This phenomenon of reducing buoyancy will be discussed. A simple equation of motion on smoke movement was set up. Some of the results of full-scale burning experiments carried out earlier for assessing the fire response of a glass façade system were applied to support the argument. Experiments indicated that smoke would take a longer time to move up when the glazing wall temperature is higher. A better smoke exhaust design accounting the reduction in buoyancy at this early stage of a fire should be worked out. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]