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Entropy 2012, 14(4), 599-613; doi:10.3390/e14040599
Article

Thermodynamic Modelling of an Ejector with Compressible Flow by a One-Dimensional Approach

,
, *  and
Laboratoire de génie des procédés pour l’environnement, l’énergie et la santé, LGP2ES-EA21, Cnam, case 2D3P20, 292 rue Saint Martin, 75141 Paris cedex 03, France Deceased
* Author to whom correspondence should be addressed.
Received: 10 January 2012 / Revised: 9 March 2012 / Accepted: 12 March 2012 / Published: 23 March 2012
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Abstract

The purpose of this study is the dimensioning of the cylindrical mixing chamber of a compressible fluid ejector used in particular in sugar refineries for degraded vapor re‑compression at the calandria exit, during the evaporation phase. The method used, known as the “integral” or “thermodynamic model”, is based on the model of the one‑dimensional isentropic flow of perfect gases with the addition of a model of losses. Characteristic curves and envelope curves are plotted. The latter are an interesting tool from which the characteristic dimensions of the ejector can be rapidly obtained for preliminary dimensioning (for an initial contact with a customer for example). These ejectors, which were specifically designed for the process rather than selected from a catalog of standard devices, will promote energy saving.
Keywords: thermodynamic model; static compression; ejector; 1D modelling; compressible fluid; design thermodynamic model; static compression; ejector; 1D modelling; compressible fluid; design
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.

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MDPI and ACS Style

Antonio, Y.M.; Périlhon, C.; Descombes, G.; Chacoux, C. Thermodynamic Modelling of an Ejector with Compressible Flow by a One-Dimensional Approach. Entropy 2012, 14, 599-613.

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