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Energies 2016, 9(3), 212; doi:10.3390/en9030212

Exergy Flows inside a One Phase Ejector for Refrigeration Systems

Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
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Academic Editor: Jean-Pierre Bédécarrats
Received: 2 February 2016 / Revised: 4 March 2016 / Accepted: 14 March 2016 / Published: 17 March 2016
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Abstract

The evaluation of the thermodynamic performance of the mutual transformation of different kinds of exergy linked to the intensive thermodynamic parameters of the flow inside the ejector of a refrigeration system is undertaken. Two thermodynamic metrics, exergy produced and exergy consumed, are introduced to assess these transformations. Their calculation is based on the evaluation of the transiting exergy within different ejector sections taking into account the temperature, pressure and velocity variations. The analysis based on these metrics has allowed pinpointing the most important factors affecting the ejector’s performance. A new result, namely the temperature rise in the sub-environmental region of the mixing section is detected as an important factor responsible for the ejector’s thermodynamic irreversibility. The overall exergy efficiency of the ejector as well as the efficiencies of its sections are evaluated based on the proposed thermodynamic metrics. View Full-Text
Keywords: ejector; efficiency; exergy produced; exergy consumed; refrigeration ejector; efficiency; exergy produced; exergy consumed; refrigeration
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Khennich, M.; Sorin, M.; Galanis, N. Exergy Flows inside a One Phase Ejector for Refrigeration Systems. Energies 2016, 9, 212.

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