Waste heat driven absorption/vapor-compression cascade refrigeration system for megawatt scale, high-flux, low-temperature cooling / Srinivas Garimella in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1776–1785 Titre : Waste heat driven absorption/vapor-compression cascade refrigeration system for megawatt scale, high-flux, low-temperature cooling Titre original : Système frigorifique à absorption à compression de vapeur entraîné par la chaleur récupérée pour le refroidissement basse température à haut flux à l'échelle des mégawatts Type de document : texte imprimé Auteurs : Srinivas Garimella, Auteur ; Ashlie M. Brown, Auteur ; Ananda Krishna Nagavarapu, Auteur Année de publication : 2012 Article en page(s) : pp. 1776–1785 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Absorption Mechanical vapour compression Cascade system Refrigeration Water Lithium bromide Carbon dioxide Résumé : A novel cascaded absorption/vapor-compression cycle with a high temperature lift for a naval ship application was conceptualized and analyzed. A single-effect LiBr–H2O absorption cycle and a subcritical CO2 vapor-compression cycle were coupled together to provide low-temperature refrigerant (−40 °C) for high heat flux electronics applications, medium-temperature refrigerant (5 °C) for space conditioning and other low heat flux applications, and as an auxiliary benefit, provide medium-temperature heat rejection (∼48 °C) for water heating applications. A thermodynamic model was developed to analyze the performance of the cascaded system, and parametric analyses were conducted to estimate the performance of the system over a range of operating conditions. The performance of the cascaded system was also compared with an equivalent two-stage vapor-compression cycle. This cycle was found to exhibit very high COPs over a wide range of operating conditions and when compared to an equivalent vapor-compression system, was found to avoid up to 31% electricity demand. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100123X [article] Waste heat driven absorption/vapor-compression cascade refrigeration system for megawatt scale, high-flux, low-temperature cooling = Système frigorifique à absorption à compression de vapeur entraîné par la chaleur récupérée pour le refroidissement basse température à haut flux à l'échelle des mégawatts [texte imprimé] / Srinivas Garimella, Auteur ; Ashlie M. Brown, Auteur ; Ananda Krishna Nagavarapu, Auteur . - 2012 . - pp. 1776–1785. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1776–1785 Mots-clés : Absorption Mechanical vapour compression Cascade system Refrigeration Water Lithium bromide Carbon dioxide Résumé : A novel cascaded absorption/vapor-compression cycle with a high temperature lift for a naval ship application was conceptualized and analyzed. A single-effect LiBr–H2O absorption cycle and a subcritical CO2 vapor-compression cycle were coupled together to provide low-temperature refrigerant (−40 °C) for high heat flux electronics applications, medium-temperature refrigerant (5 °C) for space conditioning and other low heat flux applications, and as an auxiliary benefit, provide medium-temperature heat rejection (∼48 °C) for water heating applications. A thermodynamic model was developed to analyze the performance of the cascaded system, and parametric analyses were conducted to estimate the performance of the system over a range of operating conditions. The performance of the cascaded system was also compared with an equivalent two-stage vapor-compression cycle. This cycle was found to exhibit very high COPs over a wide range of operating conditions and when compared to an equivalent vapor-compression system, was found to avoid up to 31% electricity demand. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100123X

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