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Performance analysis of desiccant dehumidification systems driven by low-grade heat source / Jongsoo Jeong in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 928-945 Titre : Performance analysis of desiccant dehumidification systems driven by low-grade heat source Titre original : Analyse de la performance des systèmes à déshumidification à déshydratant avec une source de chaleur à basse température Type de document : texte imprimé Auteurs : Jongsoo Jeong, Auteur ; Seiichi Yamaguchi, Auteur ; Kiyoshi Saito, Auteur Année de publication : 2011 Article en page(s) : pp. 928-945 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Desiccant  wheel  Optimization  Dehumidification  Desiccant  Air  conditioning  Silica  gel Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : If a desiccant dehumidification system can be driven by a heat source whose temperature is below 50 °C, exhaust heat from devices such as fuel cells or air conditioners can be used as its heat source, thereby saving energy. Therefore, in this study, we used a previously validated simulation model to determine the minimum heat source temperature for driving a desiccant dehumidification system. We considered four desiccant dehumidification systems that can be driven by waste heat—conventional desiccant-type systems (wheel type and batch type with only desiccant), a system with a precooler, double-stage-type systems (a type with two desiccant wheels and a four-partition desiccant wheel type), and a batch-type system with an internal heat exchanger. We found that among these systems, the last system can be driven by the lowest heated air temperature—approximately 33 °C—which is considerably lower than that of the conventional system. DEWEY : 621.5 ISSN : 0410-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000229X [article] Performance analysis of desiccant dehumidification systems driven by low-grade heat source = Analyse de la performance des systèmes à déshumidification à déshydratant avec une source de chaleur à basse température [texte imprimé] / Jongsoo Jeong, Auteur ; Seiichi Yamaguchi, Auteur ; Kiyoshi Saito, Auteur . - 2011 . - pp. 928-945. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 928-945 Mots-clés : Desiccant  wheel  Optimization  Dehumidification  Desiccant  Air  conditioning  Silica  gel Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : If a desiccant dehumidification system can be driven by a heat source whose temperature is below 50 °C, exhaust heat from devices such as fuel cells or air conditioners can be used as its heat source, thereby saving energy. Therefore, in this study, we used a previously validated simulation model to determine the minimum heat source temperature for driving a desiccant dehumidification system. We considered four desiccant dehumidification systems that can be driven by waste heat—conventional desiccant-type systems (wheel type and batch type with only desiccant), a system with a precooler, double-stage-type systems (a type with two desiccant wheels and a four-partition desiccant wheel type), and a batch-type system with an internal heat exchanger. We found that among these systems, the last system can be driven by the lowest heated air temperature—approximately 33 °C—which is considerably lower than that of the conventional system. DEWEY : 621.5 ISSN : 0410-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000229X

Performance analysis of four-partition desiccant wheel and hybrid dehumidification air-conditioning system / Jongsoo Jeong in International journal of refrigeration, Vol. 33 N° 3 (Mai 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 496-509 Titre : Performance analysis of four-partition desiccant wheel and hybrid dehumidification air-conditioning system Titre original : Analyse de la performance d'une roue déshydratante à quatre segments et d'un système de conditionnement d'air à déshydratant hybride Type de document : texte imprimé Auteurs : Jongsoo Jeong, Auteur ; Seiichi Yamaguchi, Auteur ; Kiyoshi Saito, Auteur Année de publication : 2010 Article en page(s) : pp. 496-509 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Air  conditioning  Desiccant  system  Desiccant  wheel  Geometry  Modelling  Simulation  Performance  Silica  gel Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A desiccant dehumidification system with air can decrease energy consumption because it can be driven by low-grade waste heat below 80 °C. If this system can be driven by low-temperature heat sources whose temperature is below 50 °C, exhausted heat from fuel cells or air conditioners that exist everywhere can be used as heat sources. This could lead to considerable energy saving. This study provides a detailed evaluation of the performance of a four-partition desiccant wheel to make a low-temperature driving heat source possible and achieve considerable energy saving by the simulation and experiment. Further, the study investigates the in-depth performance of a hybrid air-conditioning system with a four-partition desiccant wheel by simulation. As a result, it was clear that there exists an optimum rotational speed to maximize the dehumidification performance and that the hybrid air-conditioning system improves COP by approximately 94% as compared to the conventional vapour compression-type refrigerator. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002783 [article] Performance analysis of four-partition desiccant wheel and hybrid dehumidification air-conditioning system = Analyse de la performance d'une roue déshydratante à quatre segments et d'un système de conditionnement d'air à déshydratant hybride [texte imprimé] / Jongsoo Jeong, Auteur ; Seiichi Yamaguchi, Auteur ; Kiyoshi Saito, Auteur . - 2010 . - pp. 496-509. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 496-509 Mots-clés : Air  conditioning  Desiccant  system  Desiccant  wheel  Geometry  Modelling  Simulation  Performance  Silica  gel Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A desiccant dehumidification system with air can decrease energy consumption because it can be driven by low-grade waste heat below 80 °C. If this system can be driven by low-temperature heat sources whose temperature is below 50 °C, exhausted heat from fuel cells or air conditioners that exist everywhere can be used as heat sources. This could lead to considerable energy saving. This study provides a detailed evaluation of the performance of a four-partition desiccant wheel to make a low-temperature driving heat source possible and achieve considerable energy saving by the simulation and experiment. Further, the study investigates the in-depth performance of a hybrid air-conditioning system with a four-partition desiccant wheel by simulation. As a result, it was clear that there exists an optimum rotational speed to maximize the dehumidification performance and that the hybrid air-conditioning system improves COP by approximately 94% as compared to the conventional vapour compression-type refrigerator. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002783