Til hovedinnhold

Design and parametric investigation on ejector for R-744 transcritical system

Design and parametric investigation on ejector for R-744 transcritical system

Kategori
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Sammendrag
A R-744 transcritical ejector for a residential air-conditioning unit was developed. The velocity of nozzle throat part in the ejector, which is the sonic velocity in two-phase CO2 fluid, was calculated with two difference models. The results from the two models were compared. In order to improve the flashing process in the throat part, the throat part pressure was analyzed and calculated according to the 'metastable' fluid character. According to the analysis above and based on energy, mass continuity and momentum equations, the pressure and velocity distribution along the nozzle were calculated. Two different models were applied in the mixing part calculation: an isobaric model and a pressure rising model. The velocity and pressure distribution from these two models were compared and discussed. The diffuser part was calculated based on energy, mass continuity and momentum equations.
Språk
Engelsk
Forfatter(e)
  • Armin Hafner
Institusjon(er)
  • SINTEF Energi AS
År
Forlag
International Institute of Refrigeration
Bok
Proceedings : 22nd International Congress of Refrigeration : Refrigeration creates the future
ISBN
9782913149595