Experimental investigations of two-phase ejector operating with isobutane

Kamil Leszek Śmierciew , Jerzy Gagan , Dariusz Butrymowicz , Adam Dudar

Abstract

Application of a two-phase ejector in a vapour compression refrigeration system is a promising way to increase the system efficiency. Most of the investigations deal with the performance of the whole compression-refrigeration system. In contrary the paper deals with two-phase ejector only. Low GWP natural refrigerant R600a was used in the experiment. The velocity coefficients have been determined. Velocity coefficients φ for nozzles in range 0.4 < φ <1.0 and φ < 0.4 for suction and mixing chambers and diffuser were obtained. Basing on the experimental results correlations for velocity coefficient for components of the ejector have been proposed. Two physical parameters: quality of fluid, and the volumetric entrainment ratio, were selected as parameters describing relation of the velocity coefficient. The numerical results based on the proposed correlations fits with experimental data within 30%.
Author Kamil Leszek Śmierciew (FME / DMDTE)
Kamil Leszek Śmierciew,,
- Department of Machinery Design and Thermal Engineering
, Jerzy Gagan (FME / DMDTE)
Jerzy Gagan,,
- Department of Machinery Design and Thermal Engineering
, Dariusz Butrymowicz (FME / DMDTE)
Dariusz Butrymowicz,,
- Department of Machinery Design and Thermal Engineering
, Adam Dudar (FME / DMDTE)
Adam Dudar,,
- Department of Machinery Design and Thermal Engineering
Pages1-8
Publication size in sheets0.5
Book Minea Vasile (eds.): Refrigeration Science and Technology Proceedings: 25th IIR International Congress of Refrigeration, 2019, International Institute of Refrigeration, ISBN 978-2-36215-035-7, 5052 p.
Keywords in Englishtwo-phase, correlations, isobutane, ejector, velocity coefficients
DOIDOI:10.18462/iir.icr.2019.0644
Internal identifierROC 19-20
Languageen angielski
Score (nominal)0
Score sourceconferenceList
ScoreMinisterial score = 0.0, 29-10-2019, ChapterFromConference
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