Thermodynamic analysis of zeotropy mixtures for ejection refrigeration cycle

Jerzy Gagan , Paweł Jakończuk , Dariusz Butrymowicz , Kamil Leszek Śmierciew

Abstract

Ejection refrigeration cycles are driven by thermal energy. Application of low-grade heat as a motive source, e.g. district heating system requires sufficient mass flow rate of the heating water or large change of temperature of the water in order to provide required heat flux. The latter is more economically advantageous. In some cases, however, either requirements cannot be fulfilled. One of the reasons is isothermal evaporation of refrigerant in vapour generator. Because of this the refrigerant with temperature glide is highly recommended. The paper deals with thermodynamic analysis of low GWP refrigerant mixtures applied for ejection cycle. The results show that depending on the type and proportion of mixed refrigerants the temperature of the heating medium change from 5 to 25 K and more. As an effect the COP of the system vary between 5 to 25%.
Author Jerzy Gagan (FME / DMDTE)
Jerzy Gagan,,
- Department of Machinery Design and Thermal Engineering
, Paweł Jakończuk (FME)
Paweł Jakończuk,,
- Faculty of Mechanical Engineering
, Dariusz Butrymowicz (FME / DMDTE)
Dariusz Butrymowicz,,
- Department of Machinery Design and Thermal Engineering
, Kamil Leszek Śmierciew (FME / DMDTE)
Kamil Leszek Śmierciew,,
- 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 Englishrefrigerants, mixture, ejection cycle, temperature change, COP
DOIDOI:10.18462/iir.icr.2019.0646
Internal identifierROC 19-20
Languageen angielski
Score (nominal)0
Score sourceconferenceList
ScoreMinisterial score = 0.0, 29-10-2019, ChapterFromConference
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