CFD simulations of transport phenomena during transcritical flow of real fluid (CO2) within ejector

Andrzej J Nowak (Institute of Thermal Technology, Silesian University of Technology, Gliwice, Poland.)
Michal Palacz (Institute of Thermal Technology, Silesian University of Technology, Gliwice, Poland.)
Jacek Smolka (Institute of Thermal Technology, Silesian University of Technology, Gliwice, Poland.)
Krzysztof Banasiak (SINTEF Energy, Trondheim, Norway.)
Zbigniew Bulinski (Institute of Thermal Technology, Silesian University of Technology, Gliwice, Poland.)
Adam Fic (Institute of Thermal Technology, Silesian University of Technology, Gliwice, Poland.)
Armin Hafner (SINTEF Energy, Trondhei, Norway.)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Publication date: 3 May 2016

Abstract

Purpose

The purpose of this paper is to overview successful approaches to the computational simulation of real fluid (R744 – carbon dioxide (CO2)) flow within an ejector is presented. Important issues such as the ejector geometry and its optimisation, the adapted equations of state and the proposed models of the process, fluid parameters, etc., are examined and critically discussed. Whenever possible, the discussed models are experimentally validated. In the conclusion, some trends in future research are pointed out.

Design/methodology/approach

Flow within CO2 ejector is generally transcritical and compressible. Models existing in the literature are shortly described and critically compared. Whenever possible, those models were validated against the experimental data. In a model validation process, the primary and secondary mass flow rates as well as the pressures at the selected points in the mixing section and diffuser were compared, showing a satisfactory agreement between experimental and computational results.

Findings

Developed CO2 ejector flow models are tested in few industrial applications. All these initiatives bring solutions which are interesting and very promising from technological point of view.

Originality/value

This is an extensive overview of successful approaches to computational simulation of the real fluid (R744 – CO2) flow within ejector. It brings many useful information.

Keywords

Acknowledgements

The financial support obtained from the Polish Norwegian Research Fund through MultiJet Project No. Pol-Nor/196445/29/2013 is gratefully acknowledged.

Citation

Nowak, A., Palacz, M., Smolka, J., Banasiak, K., Bulinski, Z., Fic, A. and Hafner, A. (2016), "CFD simulations of transport phenomena during transcritical flow of real fluid (CO2) within ejector", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 26 No. 3/4, pp. 805-817. https://doi.org/10.1108/HFF-09-2015-0395

Download as .RIS

Publisher

:

Emerald Group Publishing Limited

Copyright © 2016, Emerald Group Publishing Limited

Please note you might not have access to this content

You may be able to access this content by login via Shibboleth, Open Athens or with your Emerald account.
If you would like to contact us about accessing this content, click the button and fill out the form.
To rent this content from Deepdyve, please click the button.