Meanline design of a 250 kW radial inflow turbine stage using R245fa working fluid and waste heat from a refinery process

Hyung-Chul Jung*, Susan Krumdieck

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The purpose of this research is to develop a meanline simulation model that provides a good starting point for the detail design of radial inflow turbine stages and then demonstrate the application of the model to the design of a turbine stage. This study begins with a thermodynamic design of an organic Rankine cycle power plant with the working fluid R245fa utilizing waste heat from a refinery process. The thermodynamic cycle analysis gives the design point of a turbine expander suitable for generating a net power of 250 kWe in the power plant. Empirical data and correlations, based on the performance measurements of a large number of turbines, from literature provide a base to determine both geometric and aerodynamic parameters of rotor blades and nozzle vanes. The efficiency of the designed turbine stage is estimated by using flow loss models for the rotor. Preliminary blade stress and modal analysis is also carried out. The numerical model is validated by comparing simulation results with published data of a gas turbine. The designed radial inflow turbine has a rotor inlet diameter of 37.2 cm and a rotational speed of 7000 r/min with a total-to-static efficiency of 87.3% predicted.

Original languageEnglish
Pages (from-to)402-414
Number of pages13
JournalProceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
Issue number4
Early online date10 Mar 2016
Publication statusPublished - Jun 2016


  • industrial waste heat power generation
  • Meanline design
  • organic Rankine cycle
  • radial inflow turbine

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering

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