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Thermodynamic simulation of alternative absorption heat pumping processes using natural working fluids / O. Kotenko 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. 594–604 Titre : Thermodynamic simulation of alternative absorption heat pumping processes using natural working fluids Titre original : Simulation thermodynamique des procédés de remplacement à pompe à chaleur à absorption utilisant des frigorigènes naturels Type de document : texte imprimé Auteurs : O. Kotenko, Auteur ; H. Moser, Auteur ; R. Rieberer, Auteur Année de publication : 2012 Article en page(s) : pp. 594–604 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Absorption  Heat  pump  Heat  transformer  Process  analysis  Refrigeration  Simulation Résumé : Three groups of alternative absorption heat pumping processes (AHP) with different natural working fluids are being analyzed in this paper: Image Absorption heat transformer (AHT) process using partially miscible working mixtures; Image AHP-processes using a condensable auxiliary fluid (Einstein–Szilard cycle, Rojey cycle); Image NH3/H2O-AHP-process using strong bases as additives (e.g. NaOH). The thermodynamic simulations have shown that a NH3/H2O absorption cycle using a strong base as additive seems to be promising for applications using low-grade heat sources and the Rojey cycle offers higher COPs than a conventional NH3/H2O-AHP at high generator temperatures and low temperature lifts. The investigated AHT-process and the Einstein–Szilard process seem presently not to be competitive compared to conventional technologies. At present the influence of strong bases on a conventional NH3/H2O-AHP is being investigated at the Institute of Thermal Engineering, Graz University of Technology. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002490 [article] Thermodynamic simulation of alternative absorption heat pumping processes using natural working fluids = Simulation thermodynamique des procédés de remplacement à pompe à chaleur à absorption utilisant des frigorigènes naturels [texte imprimé] / O. Kotenko, Auteur ; H. Moser, Auteur ; R. Rieberer, Auteur . - 2012 . - pp. 594–604. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 594–604 Mots-clés : Absorption  Heat  pump  Heat  transformer  Process  analysis  Refrigeration  Simulation Résumé : Three groups of alternative absorption heat pumping processes (AHP) with different natural working fluids are being analyzed in this paper: Image Absorption heat transformer (AHT) process using partially miscible working mixtures; Image AHP-processes using a condensable auxiliary fluid (Einstein–Szilard cycle, Rojey cycle); Image NH3/H2O-AHP-process using strong bases as additives (e.g. NaOH). The thermodynamic simulations have shown that a NH3/H2O absorption cycle using a strong base as additive seems to be promising for applications using low-grade heat sources and the Rojey cycle offers higher COPs than a conventional NH3/H2O-AHP at high generator temperatures and low temperature lifts. The investigated AHT-process and the Einstein–Szilard process seem presently not to be competitive compared to conventional technologies. At present the influence of strong bases on a conventional NH3/H2O-AHP is being investigated at the Institute of Thermal Engineering, Graz University of Technology. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002490