Experimental evaluation and performance enhancement prediction of desiccant assisted separate sensible and latent cooling air-conditioning system / Jiazhen Ling in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 946-957 Titre : Experimental evaluation and performance enhancement prediction of desiccant assisted separate sensible and latent cooling air-conditioning system Titre original : Evaluation expérimentale et prévision de l'amélioration de la performance d'un système de conditionnement d'air à chaleur sensible et latente assisté d'un déshydratant séparé Type de document : texte imprimé Auteurs : Jiazhen Ling, Auteur ; Osamu Kuwabara, Auteur ; Yunho Hwang, Auteur Année de publication : 2011 Article en page(s) : pp. 946-957 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : CO2 Cooling Desiccant Heat exchanger Latent heat R410A Sensible Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : CO2 and R410A desiccant wheel (DW)-assisted separate sensible and latent cooling (SSLC) air-conditioning systems were tested under the AHRI standard. At a 50 °C regeneration temperature, the coefficient of performance (COP) of the vapor compression cycles improved only 7% from the respective baseline systems for both refrigerants. This paper proposed the idea of applying divided condensers (or gas coolers) to the R410A (or CO2) SSLC system to enhance its performance. It was found that the application of divided heat exchangers to the SSLC system provided sufficiently hot airflow for regenerating the desiccant wheel at both a reduced high side pressure (from 10.4 MPa to 9.7 MPa for CO2, from 3.46 MPa to 3.45 MPa for R410A) and a reduced discharge temperature from the condenser (gas cooler) (4 K lower for both refrigerants). The COP improvement is 36% and 61% to R410A and CO2 baseline systems, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002835 [article] Experimental evaluation and performance enhancement prediction of desiccant assisted separate sensible and latent cooling air-conditioning system = Evaluation expérimentale et prévision de l'amélioration de la performance d'un système de conditionnement d'air à chaleur sensible et latente assisté d'un déshydratant séparé [texte imprimé] / Jiazhen Ling, Auteur ; Osamu Kuwabara, Auteur ; Yunho Hwang, Auteur . - 2011 . - pp. 946-957. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 946-957 Mots-clés : CO2 Cooling Desiccant Heat exchanger Latent heat R410A Sensible Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : CO2 and R410A desiccant wheel (DW)-assisted separate sensible and latent cooling (SSLC) air-conditioning systems were tested under the AHRI standard. At a 50 °C regeneration temperature, the coefficient of performance (COP) of the vapor compression cycles improved only 7% from the respective baseline systems for both refrigerants. This paper proposed the idea of applying divided condensers (or gas coolers) to the R410A (or CO2) SSLC system to enhance its performance. It was found that the application of divided heat exchangers to the SSLC system provided sufficiently hot airflow for regenerating the desiccant wheel at both a reduced high side pressure (from 10.4 MPa to 9.7 MPa for CO2, from 3.46 MPa to 3.45 MPa for R410A) and a reduced discharge temperature from the condenser (gas cooler) (4 K lower for both refrigerants). The COP improvement is 36% and 61% to R410A and CO2 baseline systems, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002835

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