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Modeling and simulation of the transcritical CO2 heat pump system / Kai-Hsiang, Lin in International journal of refrigeration, Vol. 36 N° 8 (Décembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2048–2064 Titre : Modeling and simulation of the transcritical CO2 heat pump system Titre original : Modélisation et simulation du système de pompe à chaleur au CO2 transcritique Type de document : texte imprimé Auteurs : Kai-Hsiang, Lin, Auteur ; Cheng-Shu, Kuo, Auteur ; Wen-Der, Hsieh, Auteur Année de publication : 2014 Article en page(s) : pp. 2048–2064 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Carbon  dioxide;  gas  cooler;  system  modeling;  COP;  transcritical Résumé : In this study, a CO2 transcritical cycle model without imposing any excessive constraints such as fixed discharge pressure and suction pressure is developed. The detailed geometrical variation of the gas cooler and the evaporator have been taken into account. The model is validated with the experimental measurements. Parametric influences on the CO2 system with regard to the effect of dry bulb temperature, relative humidity, inlet water temperature, compressor speed, and the capillary tube length are reported. The COP increases with the dry bulb temperature or the inlet relative humidity of the evaporator. Despite the refrigerant mass flowrate may be increased with the inlet water temperature, the COP declines considerably with it. Increasing the compressor speed leads to a higher heating capacity and to a much lower COP. Unlike those of the conventional sub-critical refrigerant, the COP of the transcritical CO2 cycle does not reveal a maximum value against the capillary tube length. En ligne : Modélisation et simulation du système de pompe à chaleur au CO2 transcritique [article] Modeling and simulation of the transcritical CO2 heat pump system = Modélisation et simulation du système de pompe à chaleur au CO2 transcritique [texte imprimé] / Kai-Hsiang, Lin, Auteur ; Cheng-Shu, Kuo, Auteur ; Wen-Der, Hsieh, Auteur . - 2014 . - pp. 2048–2064. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2048–2064 Mots-clés : Carbon  dioxide;  gas  cooler;  system  modeling;  COP;  transcritical Résumé : In this study, a CO2 transcritical cycle model without imposing any excessive constraints such as fixed discharge pressure and suction pressure is developed. The detailed geometrical variation of the gas cooler and the evaporator have been taken into account. The model is validated with the experimental measurements. Parametric influences on the CO2 system with regard to the effect of dry bulb temperature, relative humidity, inlet water temperature, compressor speed, and the capillary tube length are reported. The COP increases with the dry bulb temperature or the inlet relative humidity of the evaporator. Despite the refrigerant mass flowrate may be increased with the inlet water temperature, the COP declines considerably with it. Increasing the compressor speed leads to a higher heating capacity and to a much lower COP. Unlike those of the conventional sub-critical refrigerant, the COP of the transcritical CO2 cycle does not reveal a maximum value against the capillary tube length. En ligne : Modélisation et simulation du système de pompe à chaleur au CO2 transcritique