Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection / Jaehyeok Heo in International journal of refrigeration, Vol. 34 N° 2 (Mars 2011)  

Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection = Comparaison de la performance en mode chauffage des pompes à chaleur air-eau utilisant diffàrents types d'injection de frigorigàne [texte imprimé] / Jaehyeok Heo, Auteur ; Min Woo Jeong, Auteur ; Changhyun Baek, Auteur . - 2011 . - pp. 444-453.
Génie Mécanique
Langues : Anglais (eng)
in International journal of refrigeration > Vol. 34 N° 2 (Mars 2011) . - pp. 444-453

Mots-clés :	Heat pump Two-stage System injection Performance-heating
Index. décimale :	621.5 Energie pneumatique. Machinerie et outils. Réfrigération
Résumé :	The performance degradation of air-source heat pumps cannot be avoided when they operate at both very low and high ambient temperatures. The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures. This study measured the heating performance of air-source heat pumps in which novel vapor injection techniques of a combined flash tank and sub-cooler (FTSC) cycle and a double expansion sub-cooler (DESC) cycle were applied. The performance of these cycles was compared with that of a flash tank (FT) and a sub-cooler (SC) cycle. The average heating capacities of the FT, FTSC, and DESC cycles were higher by 14.4%, 6.0%, and 3.8%, respectively, relative to that of the SC cycle, but the average COPs for the respective cycle options were very similar.
DEWEY :	621.5
ISSN :	0140-7007
En ligne :	http://www.sciencedirect.com/science/article/pii/S0140700710002318