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Choice of low temperature salt for a resorption refrigerator / H. S. Bao in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4897–4903 Titre : Choice of low temperature salt for a resorption refrigerator Type de document : texte imprimé Auteurs : H. S. Bao, Auteur ; R.G. Oliveira, Auteur ; R.Z. Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 4897–4903 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Mass  refrigerant Résumé : Three bench-scale resorption systems were compared with respect to the degree of conversion, the specific cooling power, and the influence of the working condition on the temperature equilibrium drop. The mass of refrigerant that reacted during specified periods of each working condition studied was assessed gravimetrically. The three systems had MnCl2 in the main reactor, and they were designed to provide a cooling effect at 0 and at −5 °C. However, each system had a different salt (BaCl2, NaBr, or NH4Cl) in the reactor employed for cold production. The system with NH4Cl was the most suitable for cold production at the temperatures indicated above, whereas the system with BaCl2 was not suitable to operate at these levels of cooling production. Thus, we designed and manufactured a larger resorption system and assessed the feasibility of using this system to refrigerate a 33 L cold box, with two temperature zones. When the ambient temperature was 30 °C, the air temperature in the bottom of the cold box could be kept below 0 °C for 5 h, while the temperature of the upper zone remained below 6 °C for about 2.5 h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901575k [article] Choice of low temperature salt for a resorption refrigerator [texte imprimé] / H. S. Bao, Auteur ; R.G. Oliveira, Auteur ; R.Z. Wang, Auteur . - 2010 . - pp. 4897–4903. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4897–4903 Mots-clés : Mass  refrigerant Résumé : Three bench-scale resorption systems were compared with respect to the degree of conversion, the specific cooling power, and the influence of the working condition on the temperature equilibrium drop. The mass of refrigerant that reacted during specified periods of each working condition studied was assessed gravimetrically. The three systems had MnCl2 in the main reactor, and they were designed to provide a cooling effect at 0 and at −5 °C. However, each system had a different salt (BaCl2, NaBr, or NH4Cl) in the reactor employed for cold production. The system with NH4Cl was the most suitable for cold production at the temperatures indicated above, whereas the system with BaCl2 was not suitable to operate at these levels of cooling production. Thus, we designed and manufactured a larger resorption system and assessed the feasibility of using this system to refrigerate a 33 L cold box, with two temperature zones. When the ambient temperature was 30 °C, the air temperature in the bottom of the cold box could be kept below 0 °C for 5 h, while the temperature of the upper zone remained below 6 °C for about 2.5 h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901575k

Resorption system with simultaneous heat and cold production / J. Xu in International journal of refrigeration, Vol. 34 N° 5 (Août 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1262-1267 Titre : Resorption system with simultaneous heat and cold production Titre original : Système à résorption produisant de la chaleur et du froid simultanément Type de document : texte imprimé Auteurs : J. Xu, Auteur ; R.G. Oliveira, Auteur ; R.Z. Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 1262-1267 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Resorption  Adsorption  system  Heating  Cooling  Recovery Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A resorption system with simultaneous cold and heat production was studied. The heat produced could be used for sanitary or process purposes, or to drive another heat-powered machine. The resorption reactors had MnCl2 and NH4Cl as reactant (which are impregnated in expanded graphite) and NH3 as refrigerant. The combined coefficient of performance and amplification (COPA) of this system reached 1.3 when the cooling effect was produced at 0 °C and heating effect at 75 °C with the regeneration temperature of 140 °C. Its COP was 0.35 with a specific cooling power (SCP) of 1.12 MJ kg−1 day−1, and the heat sink in this case remained below the cooling temperature for more than 5 h. Because of the heat production at certain temperature level (from 70 °C to 80 °C) in this study, the released heat could be used to power a silica gel-water adsorption chiller and the overall COP of the combined system would increase dramatically. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000752 [article] Resorption system with simultaneous heat and cold production = Système à résorption produisant de la chaleur et du froid simultanément [texte imprimé] / J. Xu, Auteur ; R.G. Oliveira, Auteur ; R.Z. Wang, Auteur . - 2011 . - pp. 1262-1267. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1262-1267 Mots-clés : Resorption  Adsorption  system  Heating  Cooling  Recovery Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A resorption system with simultaneous cold and heat production was studied. The heat produced could be used for sanitary or process purposes, or to drive another heat-powered machine. The resorption reactors had MnCl2 and NH4Cl as reactant (which are impregnated in expanded graphite) and NH3 as refrigerant. The combined coefficient of performance and amplification (COPA) of this system reached 1.3 when the cooling effect was produced at 0 °C and heating effect at 75 °C with the regeneration temperature of 140 °C. Its COP was 0.35 with a specific cooling power (SCP) of 1.12 MJ kg−1 day−1, and the heat sink in this case remained below the cooling temperature for more than 5 h. Because of the heat production at certain temperature level (from 70 °C to 80 °C) in this study, the released heat could be used to power a silica gel-water adsorption chiller and the overall COP of the combined system would increase dramatically. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000752