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Document IIFRésumé
Nowadays, comfortable and efficient heating, ventilation, and air conditioning (HVAC) systems in buildings are highly desirable. Traditional vapor-compression devices exhibit a low coefficient of performance (COP) (typically 2.8–3.6) due to the cooling-based dehumidification. Temperature-and humidity-independent control (THIC) systems have been proposed to overcome the challenges; however, their COP is hindered by the sorption heat effect. Here, we report on a solid desiccant heat pump (SDHP) based on desiccant coated evaporators/condensers (DCEs/DCCs). The desiccants adsorb moisture almost isothermally and can be regenerated by the condensation heat. With the optimized refrigerant and desiccant, our proposed DCCs/DCEs feature a weakly-coupled heat and mass transfer. The system exhibits a COP of 6~7, doubling the efficiency of heat pumps currently used in household, which opens a window for the future development of HVAC systems and also a broad range of THIC applications.
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Détails
- Titre original : Highly efficient heat pump with desiccant coated evaporator and condenser: principle and application.
- Identifiant de la fiche : 30026554
- Langues : Anglais
- Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Date d'édition : 24/08/2019
- DOI : http://dx.doi.org/10.18462/iir.icr.2019.1879
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Indexation
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Thèmes :
Equipements d'humidification/déshumidification;
Techniques des pompes à chaleur;
Evaporateurs, condenseurs et autres échangeurs thermiques;
Transfert de chaleur;
Transfert de masse - Mots-clés : Coefficient de transfert de chaleur; Coefficient de transfert de masse; Adsorption; Simulation; Pompe à chaleur; Experimentation; Efficacité énergétique; Déshydratant; Cycle thermodynamique; Frigorigène
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