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An improved thermodynamic model for supersonic real-gas ejectors using the compound-choking theory

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  • Metsue, Antoine
  • Debroeyer, Romain
  • Poncet, Sébastien
  • Bartosiewicz, Yann

Abstract

Thermodynamic models constitute one of the essential tools to properly design supersonic ejectors. However, by their simplistic nature, most of said models remain unable to properly integrate the adequate physics that takes place within the device. Most notably, the Fabri-choking theory constitutes the building block of the large majority of those models. However, it has recently been shown that the so-called compound-choking theory may be better suited to predict the behavior of a double choked ejector. In the present study, a new state-of-the-art thermodynamic model based on the compound-choking theory is presented. First, the algorithm of the on- and off-design model is laid out. Then, the link between Fabri- and compound-choking is clarified by comparing the model with its Fabri-choking counterpart. Characteristic curves are calibrated onto air and R134a experimental data. Finally, an analytical study is performed to show that imposing the compound-choking is actually equivalent to maximizing the mass flow rate within the ejector.

Suggested Citation

  • Metsue, Antoine & Debroeyer, Romain & Poncet, Sébastien & Bartosiewicz, Yann, 2022. "An improved thermodynamic model for supersonic real-gas ejectors using the compound-choking theory," Energy, Elsevier, vol. 238(PB).
    • Handle: RePEc:eee:energy:v:238:y:2022:i:pb:s0360544221021046
    DOI: 10.1016/j.energy.2021.121856
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    References listed on IDEAS

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    1. Chen, Xiangjie & Omer, Siddig & Worall, Mark & Riffat, Saffa, 2013. "Recent developments in ejector refrigeration technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 19(C), pages 629-651.
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    6. Lamberts, Olivier & Chatelain, Philippe & Bourgeois, Nicolas & Bartosiewicz, Yann, 2018. "The compound-choking theory as an explanation of the entrainment limitation in supersonic ejectors," Energy, Elsevier, vol. 158(C), pages 524-536.
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    Cited by:

    1. Wang, Kai & Wang, Lei & Gao, Rui, 2023. "An extended mechanism model of gaseous ejectors," Energy, Elsevier, vol. 264(C).
    2. Zhou, Yifan & Chen, Guangming & Hao, Xinyue & Gao, Neng & Volovyk, Oleksii, 2023. "Working mechanism and characteristics analysis of a novel configuration of a supersonic ejector," Energy, Elsevier, vol. 278(PB).

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