Thermodynamic analyses of ejector refrigeration cycle with zeotropic mixture

Bo Liu, Xiangji Guo, Xiuzhi Xi, Jianhua Sun, Bo Zhang and Zhuqiang Yang

Energy, 2023, vol. 263, issue PD

Abstract: In this study, a model is established for an ejector with a zeotropic refrigerant as the working medium, and the refrigeration cycle of the ejector is analysed. Depending on the boiling point, different refrigerants are combined to prepare R123/R245fa, R245fa/R141b, R141b/RC318, R245fa/R134a, R245fa/R22, R141b/R134a, R245fa/R143a, and R141b/R22. The temperature and pressure in the generator, evaporator, and condenser are calculated using these refrigerants, and the influence of the temperature glide on these conditions is investigated. The performance of the ejector refrigeration cycle is also studied. The results indicate that the outlet temperatures of both the generator and evaporator can be increased using a zeotropic mixture compared to that using a pure refrigerant. In the condenser, the average temperature difference of the heat transfer is larger than that of the pure refrigerant because of the temperature glide characteristics of the zeotropic refrigerant, which reduces the heat transfer area of the condenser. Among the studied refrigerants, using R245fa/R22 (0.3/0.7) as the working medium yields the refrigeration cycle with the best COP (0.293), which is 4% and 22% higher than those using R22 and R245fa, respectively. The results reveal the advantages of zeotropic refrigerants and provide a theoretical foundation for further research.

Keywords: Zeotropic mixture; Ejector refrigeration cycle; Finite heat capacity source; Temperature glide; Entrainment ratio (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544222028754
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:263:y:2023:i:pd:s0360544222028754

DOI: 10.1016/j.energy.2022.125989

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().