Refrigerant injection for heat pumping/air conditioning systems: Literature review and challenges discussions / Xing Xu in International journal of refrigeration, Vol. 34 N° 2 (Mars 2011)  

Refrigerant injection for heat pumping/air conditioning systems: Literature review and challenges discussions = Injection du frigorigène dans les systèmes à pompe à chaleur et de conditionnement d'air : passage en revue de la littérature et discussion sur les défis [texte imprimé] / Xing Xu, Auteur ; Yunho Hwang, Auteur ; Reinhard Radermacher, Auteur . - 2011 . - pp. 402-415.
Génie Mécanique
Langues : Anglais (eng)
in International journal of refrigeration > Vol. 34 N° 2 (Mars 2011) . - pp. 402-415

Mots-clés :	Liquid Vapor Separation Injection Tank Heat exchanger
Index. décimale :	621.5 Energie pneumatique. Machinerie et outils. Réfrigération
Résumé :	This paper reviews the major research on refrigerant injection techniques in detail. Liquid and vapor refrigerant injection techniques are discussed and compared. The current research on refrigerant injection techniques falls into two categories: system level research and component level research. The system level research is focused on low ambient temperature heating, heat pump water heating, high ambient temperature cooling, cycle comparison, and control strategy development. Internal heat exchanger and flash tank cycles are the two typical cycles for refrigerant injection. These two cycles are discussed and compared in detail. The component level research is focused on employing different types of compressors, variable speed compressors, the injection process, and the flash tank. Different types of compressors employing refrigerant injection are presented. Based on the literature study, the potential future research directions are presented and discussed. The flash tank cycle control strategy and refrigerant charge management strategy are worth further research efforts. Compressor design can be improved in order to optimize the performance with refrigerant injection. The appropriate design of flash tanks plays a vital role in achieving appropriate two-phase flow patterns in the flash tank. Computational Fluid Dynamics (CFD) modeling can be a useful tool to facilitate the design of the flash tank.
DEWEY :	621.5
ISSN :	0140-7007
En ligne :	http://www.sciencedirect.com/science/article/pii/S0140700710002239