Modeling of a novel spool compressor with multiple vapor refrigerant injection ports / Margaret M. Mathison in International journal of refrigeration, Vol. 36 N° 7 (Novembre 2013)  

Modeling of a novel spool compressor with multiple vapor refrigerant injection ports = Modélisation d'un compresseur à rotor innovant muni de plusieurs orifices d'injection du frigorigène sous forme de vapeur [texte imprimé] / Margaret M. Mathison, Auteur ; James E. Braun, Auteur ; Eckhard A. Groll, Auteur . - 2014 . - pp. 1982–1997.
Refrigeration
Langues : Anglais (eng)
in International journal of refrigeration > Vol. 36 N° 7 (Novembre 2013) . - pp. 1982–1997

Mots-clés :	Spool compressor  Novel Compressor modeling  Injection  Economizing  Air conditioning units
Résumé :	A model of a novel rotary spool compressor has been developed to explore the effect of multiple injection ports on compressor and cycle performance. The thermodynamic model includes the effects of heat transfer and leakage and is numerically solved to predict the compressor power consumption and mass flow rate. Saturated vapor injection is modeled assuming that the injection pressures and the timing of the injection process can be controlled. The model predicts that adding a single injection port will provide a 12% increase in the cycle coefficient of performance (COP) when the compressor runs at 1907 rpm with R-22 evaporating at −7 °C, condensing at 49 °C, and 15 °C of superheat. Adding a second, non-optimized injection port increases the COP by 16% compared to the cycle without injection. The model is used to investigate the effect of injection pressure, port location, and port diameter on cycle performance.
En ligne :	http://www.sciencedirect.com/science/article/pii/S0140700713000765