Journal of Mechanical Science and Technology

, Volume 31, Issue 4, pp 1721–1728 | Cite as

Numerical investigation of an Organic Rankine cycle radial inflow two-stage turbine

  • F. Hamdi
  • J. Seo
  • S. Han


The Organic Rankine cycle power plants have recently been the subject of intensive and remarkable growth in research worldwide. The system operates using very impressive technology to convert low to moderate heat sources into useful electrical power by means of a turbine. It offers the advantages of better operating performance, less crowded components compared to the classical steam and gas power plants for low power ranges, and more importantly, no greenhouse gas effects on the atmosphere. Numerical investigations of the turbine play a major role in improving the performance of the system, and an accurate CFD simulation interfaced with accurate thermodynamic models is considered a significant step in the design and prediction of the turbine performance. This paper draws both numerical and experimental performance maps of an ORC radial inflow two-stage turbine, starting with experimental data collection and refinement, passing by the performance parameters calculation. A commercial CFD tool was used to study the grid-independency of the numerical performance maps; a medium and fine mesh were generated and checked against the experiments. The look-up-tables interpolation method was implemented in this study to evaluate the working fluid thermodynamic properties. The main objective of this work is the validation and improvement of the numerical model prediction with respect to the experimental results.


Experiment Numerical model ORC turbine Performance map Thermodynamic model 


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  1. [1]
    P. Colonna, E. Casati, C. Trapp, T. Mathijssen, J. Larjola, T. Turunen-Saaresti and A. Uusitalo, Organic Rankine cycle power systems: from the concept to current technology, applications, and an outlook to the future, Journal of Engineering for Gas Turbines and Power, 137 (2015) 100801–1~19.CrossRefGoogle Scholar
  2. [2]
    E. Sauret and Y. Gu, Three-dimensional off-design numerical analysis of an organic Rankine cycle radial-inflow turbine, Applied Energy, 135 (2014) 202–211.CrossRefGoogle Scholar
  3. [3]
    P. Colonna, S. Rebay, J. Harinck and A. Guardone, Real-gas effects in ORC turbine flow simulations: Influence of thermodynamic models on flow fields and performance parameters, European Conference on Computational Fluid Dynamics, ECCOMAS CFD (2006).Google Scholar
  4. [4]
    J. Hoffren, T. Talonpoika, J. Larjola and T. Siikonen, Numerical simulation of real-gas flow in a supersonic turbine nozzle ring, Journal of Engineering for Gas Turbines and Power, 124 (2002) 395–403.CrossRefGoogle Scholar
  5. [5]
    P. Boncinelli, F. Rubechini, A. Arnone, M. Cecconi and C. Cortese, Real gas effects in turbomachinery flows: A computational fluid dynamics model for fast computations, Journal of Turbomachinery, 126 (2004) 268–276.CrossRefGoogle Scholar
  6. [6]
    P. Cinnella and P. M. Congedo, A numerical solver for dense gas flows, AIAA Journal, 43 (11) (2005) 2458–2461.CrossRefGoogle Scholar
  7. [7]
    J. Harinck, T. Turunen-Saaresti, P. Colonna, S. Rebay and J. V. Buijtenen, Computational study of a high-expansion ratio radial organic Rankine cycle turbine stator, Journal of Engineering for Gas Turbines and Power, 132 (2010) 054501–1~6.CrossRefGoogle Scholar
  8. [8]
    S. H. Kang, Design and experimental study of ORC (organic Rankine cycle) and radial turbine using R245fa working fluid, Energy, 41 (2012) 514–524.CrossRefGoogle Scholar
  9. [9]
    S. Y. Cho, C. H Cho, K. Y. Ahn and Y. D. Lee, A study of the optimal operating conditions in the organic Rankine cycle using a turbo-expander for fluctuations of the available thermal energy, Energy, 64 (2014) 900–911.CrossRefGoogle Scholar
  10. [10]
    S. Han, J. B. Seo and B. S. Choi, Development of a 200 kW ORC radial turbine for waste heat recovery, Journal of Mechanical Science and Technology, 28 (12) (2014) 5231–5241.CrossRefGoogle Scholar
  11. [11]
    H. Moustapha, M. F. Zelesky, N. C. Baines and D. Japikse, Axial and radial turbines, Concepts NREC (2003).Google Scholar
  12. [12]
    E. W. Lemmon and R. Span, Short fundamental equations of state for 20 industrial fluids, Journal of Chemical Engineering & Data, 51 (2006) 785–850.CrossRefGoogle Scholar
  13. [13]
    E. Rinaldi, R. Pecnik and P. Colonna, Unsteady operation of a highly supersonic organic Rankine cycle turbine, Journal of Turbomachinery, 138 (2016) 121010–1~9.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Seoul National University of Science and TechnologySeoulKorea

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