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Adsorption cooling system employing granular activated carbon–R134a pair for renewable energy applications / Ahmed A. Askalany in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 1037–1044 Titre : Adsorption cooling system employing granular activated carbon–R134a pair for renewable energy applications Titre original : Système de refroidissement à adsorption utilisant le couple actif charbon actif granulé / R134a dans les applications de l'énergie renouvelable Type de document : texte imprimé Auteurs : Ahmed A. Askalany, Auteur ; Bidyut B. Saha, Auteur ; Mahmoud S. Ahmed, Auteur Année de publication : 2013 Article en page(s) : pp. 1037–1044 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Activated  carbon;  Adsorption;  Cooling;  Waste  heat  recovery Résumé : An adsorption cooling system has been designed and built employing granular activated carbon (GAC)–R134a as adsorbent–refrigerant pair. The performance of the system has been determined using a cycle simulation computer program written in Fortran. The performance of the system has been determined varying driving heat source inlet temperatures and delivered evaporator temperatures. The maximum driving heat source temperature is kept below 100 °C to utilize solar thermal energy or waste heat sources. The results showed good agreement between the theoretical and experimental data. The maximum theoretical coefficient of performance (COP) is obtained as 0.35. The experimental specific cooling energy (SCE) is reached up to 70 kJ kg−1 whereas the maximum theoretical SCE of the system is 83 kJ kg−1. The pressurized-bed adsorption cooling system can effectively utilize low grade waste heat of temperature below 100 °C. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003088 [article] Adsorption cooling system employing granular activated carbon–R134a pair for renewable energy applications = Système de refroidissement à adsorption utilisant le couple actif charbon actif granulé / R134a dans les applications de l'énergie renouvelable [texte imprimé] / Ahmed A. Askalany, Auteur ; Bidyut B. Saha, Auteur ; Mahmoud S. Ahmed, Auteur . - 2013 . - pp. 1037–1044. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 1037–1044 Mots-clés : Activated  carbon;  Adsorption;  Cooling;  Waste  heat  recovery Résumé : An adsorption cooling system has been designed and built employing granular activated carbon (GAC)–R134a as adsorbent–refrigerant pair. The performance of the system has been determined using a cycle simulation computer program written in Fortran. The performance of the system has been determined varying driving heat source inlet temperatures and delivered evaporator temperatures. The maximum driving heat source temperature is kept below 100 °C to utilize solar thermal energy or waste heat sources. The results showed good agreement between the theoretical and experimental data. The maximum theoretical coefficient of performance (COP) is obtained as 0.35. The experimental specific cooling energy (SCE) is reached up to 70 kJ kg−1 whereas the maximum theoretical SCE of the system is 83 kJ kg−1. The pressurized-bed adsorption cooling system can effectively utilize low grade waste heat of temperature below 100 °C. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003088

Experimental study on adsorption–desorption characteristics of granular activated carbon/R134a pair / Ahmed A. Askalany 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. 494–498 Titre : Experimental study on adsorption–desorption characteristics of granular activated carbon/R134a pair Titre original : Etude expérimentale sur les caractéristiques d'adsorption / désorption d'un couple actif charbon actif granulé/R134a Type de document : texte imprimé Auteurs : Ahmed A. Askalany, Auteur ; Salem, M., Auteur ; I.M. Ismail, Auteur Année de publication : 2012 Article en page(s) : pp. 494–498 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Adsorption  Activated  carbon  Cooling  R134a Résumé : Experimental runs were done to estimate the adsorption characteristics of granular activated carbon (GAC)/R134a pair. A laboratory scale test rig was designed and built to run the experiments. The adsorption capacity of the GAC was studied at different temperatures 25 °C, 35 °C, 45 °C and 65 °C. Pressure and time were recorded during the experiments. The maximum adsorption capacity was found to be 1.68 kgR134a kgcarbon−1 at 25 °C after 1000 s. The activation energy and the exponential constant were estimated to be 9575 J mol−1 and 1.83 respectively. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000843 [article] Experimental study on adsorption–desorption characteristics of granular activated carbon/R134a pair = Etude expérimentale sur les caractéristiques d'adsorption / désorption d'un couple actif charbon actif granulé/R134a [texte imprimé] / Ahmed A. Askalany, Auteur ; Salem, M., Auteur ; I.M. Ismail, Auteur . - 2012 . - pp. 494–498. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 494–498 Mots-clés : Adsorption  Activated  carbon  Cooling  R134a Résumé : Experimental runs were done to estimate the adsorption characteristics of granular activated carbon (GAC)/R134a pair. A laboratory scale test rig was designed and built to run the experiments. The adsorption capacity of the GAC was studied at different temperatures 25 °C, 35 °C, 45 °C and 65 °C. Pressure and time were recorded during the experiments. The maximum adsorption capacity was found to be 1.68 kgR134a kgcarbon−1 at 25 °C after 1000 s. The activation energy and the exponential constant were estimated to be 9575 J mol−1 and 1.83 respectively. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000843