Documents disponibles écrits par cet auteur

A correlation for confined nucleate boiling heat transfer / Mark Aaron Chan in Journal of heat transfer, Vol. 133 N° 7 (Juillet 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [074502/1-4] Titre : A correlation for confined nucleate boiling heat transfer Type de document : texte imprimé Auteurs : Mark Aaron Chan, Auteur ; Christopher R. Yap, Auteur ; Kim Choon Ng, Auteur Année de publication : 2011 Article en page(s) : pp. [074502/1-4] Note générale : Physique Langues : Anglais (eng) Mots-clés : Confined  boiling  Boiling  enhancement  Boiling  correlation  Bond  number  Electronic  cooling  Nucleate  boiling Index. décimale : 536 Chaleur. Thermodynamique Résumé : This study presents a generalized confined boiling correlation applicable for various working fluids and operating conditions. A dimensionless parameter, Bond number, has been incorporated into the correlation to include the effects of confinement in the ebullition process of boiling. The proposed correlation is compared with an existing correlation based on their capability in predicting confined boiling data from the literature. A phenomenon of heat transfer coefficient stagnation is found for boiling in narrow spaces despite an increase in heat flux. Results show that the proposed correlation entails an excellent agreement with experimental data, and the predictions have a reasonably low mean absolute error of 17.3% for the entire database. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...] [article] A correlation for confined nucleate boiling heat transfer [texte imprimé] / Mark Aaron Chan, Auteur ; Christopher R. Yap, Auteur ; Kim Choon Ng, Auteur . - 2011 . - pp. [074502/1-4]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [074502/1-4] Mots-clés : Confined  boiling  Boiling  enhancement  Boiling  correlation  Bond  number  Electronic  cooling  Nucleate  boiling Index. décimale : 536 Chaleur. Thermodynamique Résumé : This study presents a generalized confined boiling correlation applicable for various working fluids and operating conditions. A dimensionless parameter, Bond number, has been incorporated into the correlation to include the effects of confinement in the ebullition process of boiling. The proposed correlation is compared with an existing correlation based on their capability in predicting confined boiling data from the literature. A phenomenon of heat transfer coefficient stagnation is found for boiling in narrow spaces despite an increase in heat flux. Results show that the proposed correlation entails an excellent agreement with experimental data, and the predictions have a reasonably low mean absolute error of 17.3% for the entire database. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...]

Pool boiling heat transfer of water on finned surfaces at near vacuum pressures / Mark Aaron Chan in Journal of heat transfer, Vol. 132 N° 3 (Mars 2010) 

Public ISBD [article]  in Journal of heat transfer > Vol. 132 N° 3 (Mars 2010) . - pp. [031501-1/6] Titre : Pool boiling heat transfer of water on finned surfaces at near vacuum pressures Type de document : texte imprimé Auteurs : Mark Aaron Chan, Auteur ; Christopher R. Yap, Auteur ; Kim Choon Ng, Auteur Article en page(s) : pp. [031501-1/6] Note générale : Physique Langues : Anglais (eng) Mots-clés : Boiling  Extended  surfaces  Subatmospheric  pressure  Boiling  enhancement  Thermosyphon  Electronic  cooling  Bubble  visualization Index. décimale : 536 Chaleur. Thermodynamique Résumé : This research paper presents a study of boiling heat transfer from longitudinal rectangular-finned surfaces immersed in saturated water at low vapor pressures. Finned surfaces with assorted fin spacing, fin thicknesses, and fin heights on a copper based surface have been investigated. All the finned surfaces were found to increase both boiling heat transfer coefficients and critical heat fluxes. An optimal fin thickness was found for a configuration, and heat transfer coefficients have been obtained at the pressures. Factors affecting the boiling characteristics have been identified and the optimal enhancement requires a balance of the active nucleation sites, bubble flow resistance, natural convection, thin film evaporation, liquid superheating, heat transfer area, bubble coalescence, and liquid reflux resistance. High speed visualization of vapor plug and vapor film generation on the boiling surfaces has revealed significant insights into the boiling mechanisms at low saturation pressures. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Pool boiling heat transfer of water on finned surfaces at near vacuum pressures [texte imprimé] / Mark Aaron Chan, Auteur ; Christopher R. Yap, Auteur ; Kim Choon Ng, Auteur . - pp. [031501-1/6]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 132 N° 3 (Mars 2010) . - pp. [031501-1/6] Mots-clés : Boiling  Extended  surfaces  Subatmospheric  pressure  Boiling  enhancement  Thermosyphon  Electronic  cooling  Bubble  visualization Index. décimale : 536 Chaleur. Thermodynamique Résumé : This research paper presents a study of boiling heat transfer from longitudinal rectangular-finned surfaces immersed in saturated water at low vapor pressures. Finned surfaces with assorted fin spacing, fin thicknesses, and fin heights on a copper based surface have been investigated. All the finned surfaces were found to increase both boiling heat transfer coefficients and critical heat fluxes. An optimal fin thickness was found for a configuration, and heat transfer coefficients have been obtained at the pressures. Factors affecting the boiling characteristics have been identified and the optimal enhancement requires a balance of the active nucleation sites, bubble flow resistance, natural convection, thin film evaporation, liquid superheating, heat transfer area, bubble coalescence, and liquid reflux resistance. High speed visualization of vapor plug and vapor film generation on the boiling surfaces has revealed significant insights into the boiling mechanisms at low saturation pressures. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]

Study on a waste heat-driven adsorption cooling cum desalination cycle / Kim Choon Ng in International journal of refrigeration, Vol. 35 N° 3 (Mai 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 685–693 Titre : Study on a waste heat-driven adsorption cooling cum desalination cycle Titre original : Etude sur un cycle de refroidissement à adsorption utilisé également pour le dessalement, entraîné à l'aide de la récupération de chaleur Type de document : texte imprimé Auteurs : Kim Choon Ng, Auteur ; Kyaw Thu, Auteur ; Bidyut Baran Saha, Auteur Année de publication : 2012 Article en page(s) : pp. 685–693 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Adsorption  Cooling  Desalination  Waste  heat  Recovery Résumé : This article presents the performance analysis of a waste heat-driven adsorption cycle. With the implementation of adsorption–desorption phenomena, the cycle simultaneously produces cooling energy and high-grade potable water. A mathematical model is developed using isotherm characteristics of the adsorbent/adsorbate pair (silica gel and water), energy and mass balances for the each component of the cycle. The cycle is analyzed using key performance parameters namely (i) specific cooling power (SCP), (ii) specific daily water production (SDWP), (iii) the coefficient of performance (COP) and (iv) the overall conversion ratio (OCR). The numerical results of the adsorption cycle are validated using experimental data. The parametric analysis using different hot and chilled water temperatures are reported. At 85 °C hot water inlet temperature, the cycle generates 3.6 m3 of potable water and 23 Rton of cooling at the produced chilled water temperature of 10 °C. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000211 [article] Study on a waste heat-driven adsorption cooling cum desalination cycle = Etude sur un cycle de refroidissement à adsorption utilisé également pour le dessalement, entraîné à l'aide de la récupération de chaleur [texte imprimé] / Kim Choon Ng, Auteur ; Kyaw Thu, Auteur ; Bidyut Baran Saha, Auteur . - 2012 . - pp. 685–693. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 685–693 Mots-clés : Adsorption  Cooling  Desalination  Waste  heat  Recovery Résumé : This article presents the performance analysis of a waste heat-driven adsorption cycle. With the implementation of adsorption–desorption phenomena, the cycle simultaneously produces cooling energy and high-grade potable water. A mathematical model is developed using isotherm characteristics of the adsorbent/adsorbate pair (silica gel and water), energy and mass balances for the each component of the cycle. The cycle is analyzed using key performance parameters namely (i) specific cooling power (SCP), (ii) specific daily water production (SDWP), (iii) the coefficient of performance (COP) and (iv) the overall conversion ratio (OCR). The numerical results of the adsorption cycle are validated using experimental data. The parametric analysis using different hot and chilled water temperatures are reported. At 85 °C hot water inlet temperature, the cycle generates 3.6 m3 of potable water and 23 Rton of cooling at the produced chilled water temperature of 10 °C. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000211