Optimum cycle control of a two-stage injection heat pump with a double expansion sub-cooler / Jaehyeok Heo in International journal of refrigeration, Vol. 35 N° 1 (Janvier 2012)  

Optimum cycle control of a two-stage injection heat pump with a double expansion sub-cooler = Régulation optimale du cycle d'une pompe à chaleur biétagée à injection munie d'un système de sous-refroidissement à deux détendeurs [texte imprimé] / Jaehyeok Heo, Auteur ; Hoon Kang, Auteur ; Yongchan Kim, Auteur . - 2012 . - pp. 58–67.
Génie mécanique
Langues : Anglais (eng)
in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 58–67

Mots-clés :	Heat pump Two-stage Injection Control Optimization
Résumé :	The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures, and various control methods for a heat pump with injection have been presented. However, most studies on cycle control have been theoretical, and practical control methods for cycle optimization based on experimental results hardly have been presented. In this study, an optimum cycle control method was proposed for a refrigerant injection heat pump with a double expansion sub-cooler based on the intermediate pressure and the injection ratio. The optimum sub-cooler pressure ratio was proposed from 0.4 to 0.7 in view of the heating capacity, and from 0.7 to 0.8 in view of the COP. The optimum injection ratio increased from 0.1 to 0.3 with an increase in the compression ratio.
ISSN :	0140-7007
En ligne :	http://www.sciencedirect.com/science/article/pii/S0140700711002210