Effects of flash tank vapor injection on the heating performance of an inverter-driven heat pump for cold regions / Jaehyeok Heo in International journal of refrigeration, Vol. 33 N° 4 (Juin 2010)  

Effects of flash tank vapor injection on the heating performance of an inverter-driven heat pump for cold regions = Effets de ĺinjection de la vapeur du réservoir intermédiaire sur la performance en application chauffage d'une pompe à chaleur entraînée par convertisseur dans les climats froids [texte imprimé] / Jaehyeok Heo, Auteur ; Min Woo Jeong, Auteur ; Yongchan Kim, Auteur . - 2010 . - pp. 848-855.
Génie Mécanique
Langues : Anglais (eng)
in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 848-855

Mots-clés :	Heat pump Two-stage system Variable speed Compressor Experiment Injection Performance COP
Index. décimale :	621.5 Energie pneumatique. Machinerie et outils. Réfrigération
Résumé :	A heat pump has received much attention as substitute for the conventional boiler or heating coil because of its high efficiency. For the wide application of the heat pump, the most important design factor is the performance degradation upon its installation in tropical and cold regions. In this study, the effects of flash tank vapor injection on the heating performance of a two-stage heat pump with an inverter-driven twin rotary compressor were measured and analyzed for compressor frequency ranging from 50 to 100 Hz at ambient temperatures of −15, −5, and 5 °C. The COP and heating capacity of the injection cycle were enhanced by 10% and 25%, respectively, at the ambient temperature of −15 °C. The total mass flow rate of the injection cycle was 30–38% higher than that of the non-injection cycle.
DEWEY :	621.5
ISSN :	0140-7007
En ligne :	http://www.sciencedirect.com/science/article/pii/S0140700710000022