Performance of fixed geometry ejectors with a swirl motion installed in a multi-ejector module of a CO2 refrigeration system

Jakub Bodys, Jacek Smolka, Michal Palacz, Michal Haida, Krzysztof Banasiak, Andrzej J. Nowak and Armin Hafner

Energy, 2016, vol. 117, issue P2, 620-631

Abstract: This paper provides a performance comparison of fixed ejectors with and without swirl flow at the inlet of the motive and suction nozzles installed in a CO2 supermarket refrigeration system. The Coefficient of Performance (COP) of the multi-ejector-based refrigeration system is dependent on the design of this device. The literature suggests that one of the possible ejector efficiency improvements can be performed using a swirl generator at the inlet of the motive nozzle. Therefore, a swirl generator was simulated for different size CO2 ejectors under typical operating conditions in a supermarket and for a range of rotational speeds. To compare the potential of both solutions, the device performance was numerically simulated using a validated Homogeneous Equilibrium Model (HEM) model for the same transcritical parameters. A global efficiency was presented and discussed for both fixed ejector types.

Keywords: CO2 ejector; Ejector performance; Swirl flow; CO2 refrigeration unit; COP improvement (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544216309616
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:117:y:2016:i:p2:p:620-631

DOI: 10.1016/j.energy.2016.07.037

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 ().