Fluid-dynamic design and characterization of a mini-ORC turbine for laboratory experiments

M. Pini*, C. De Servi, M. Burigana, J.S. Bahamonde Noriega, A. Rubino, S. Vitale, P. Colonna

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

23 Citations (Scopus)
111 Downloads (Pure)


High temperature Organic Rankine Cycles power systems of low power capacity, i.e. 3-50 kWe, are receiving recognition for distributed and mobile energy generation applications. For this type of power plants, it is customary to adopt a radial-turbine as prime mover, essentially for their ability to cope with very large volumetric flow ratio with limited fluid-dynamic penalty. To date, the design of such turbines is based on design guidelines and loss models developed mainly for turbo-chargers, subsequently adapted by means of non-validated computational fluid-dynamic calculations. In the attempt to provide data sets for CFD validation and calibration of loss models, a mini-ORC radial inflow turbine delivering 10kW of mechanical power will be realized and tested in the Propulsion and Power Laboratory of TU-Delft. The fluid dynamic design and characterization of the machine is detailed in this paper. According to available models, the results indicate that the optimal layout of mini-ORC turbines can substantially differ from that of radial-inflow turbines utilized in more traditional applications, strengthening the need of experimental campaigns to support the conception of new design practices.

Original languageEnglish
Title of host publication4th International Seminar on ORC Power Systems
Subtitle of host publicationMilano, Italy
EditorsV. Dossena, A. Guardone, M. Astolfi
Number of pages8
Publication statusPublished - 2017

Publication series

NameEnergy Procedia
ISSN (Print)1876-6102


  • CFD
  • Loss Breakdown
  • mini-ORC turbines
  • radial-inflow turbine


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