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Multi-vane expanders: Vane dynamics and friction losses

Author

Listed:
  • Badr, O.
  • Probert, S. D.
  • O'Callaghan, P.

Abstract

Mechanical friction and viscous drag represent major causes of power loss in multi-vane expanders. So a mathematical model has been developed to describe these loss phenomena. The constructed dynamic model was employed to investigate the loss of contact between the vanes and the stator-cylinder, which results in significant internal leakage losses. Two existing designs of multi-vane expander were considered in detail when using R-113 as the working fluid. The composed computer sub-routines were used to predict the effects of the different design parameters and operating conditions on the mechanical efficiencies of the expanders. The predictions obtained indicate that most of the frictional power loss in a multi-vane expander occurs due to the rubbing of the vanes against the stator-cylinder. Either the operating conditions for an existing expander can be controlled, or the optimal design parameters of a proposed expander for a particular application can be selected, in order to maximise the appropriate multi-vane expander's mechanical efficiency.

Suggested Citation

  • Badr, O. & Probert, S. D. & O'Callaghan, P., 1985. "Multi-vane expanders: Vane dynamics and friction losses," Applied Energy, Elsevier, vol. 20(4), pages 253-285.
    • Handle: RePEc:eee:appene:v:20:y:1985:i:4:p:253-285
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    Cited by:

    1. Bianchi, Giuseppe & Cipollone, Roberto, 2015. "Theoretical modeling and experimental investigations for the improvement of the mechanical efficiency in sliding vane rotary compressors," Applied Energy, Elsevier, vol. 142(C), pages 95-107.
    2. Piotr Kolasiński, 2019. "Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities," Energies, MDPI, vol. 12(15), pages 1-26, August.
    3. Dawo, Fabian & Eyerer, Sebastian & Pili, Roberto & Wieland, Christoph & Spliethoff, Hartmut, 2021. "Experimental investigation, model validation and application of twin-screw expanders with different built-in volume ratios," Applied Energy, Elsevier, vol. 282(PA).
    4. Fabio Fatigati & Marco Di Bartolomeo & Davide Di Battista & Roberto Cipollone, 2020. "Experimental Validation of a New Modeling for the Design Optimization of a Sliding Vane Rotary Expander Operating in an ORC-Based Power Unit," Energies, MDPI, vol. 13(16), pages 1-23, August.
    5. Vodicka, Vaclav & Novotny, Vaclav & Zeleny, Zbynek & Mascuch, Jakub & Kolovratnik, Michal, 2019. "Theoretical and experimental investigations on the radial and axial leakages within a rotary vane expander," Energy, Elsevier, vol. 189(C).
    6. Imran, Muhammad & Usman, Muhammad & Park, Byung-Sik & Lee, Dong-Hyun, 2016. "Volumetric expanders for low grade heat and waste heat recovery applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 1090-1109.
    7. Przemysław Błasiak & Piotr Kolasiński & Sindu Daniarta, 2023. "Numerical Analysis of Heat Transfer within a Rotary Multi-Vane Expander," Energies, MDPI, vol. 16(6), pages 1-32, March.

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