3D CFD simulations of a candidate R143a radial-inflow turbine for geothermal power applications

Sauret, Emilie & Gu, YuanTong (2014) 3D CFD simulations of a candidate R143a radial-inflow turbine for geothermal power applications. In Proceedings of the ASME 2014 Power Conference, ASME, Baltimore, Maryland, USA, pp. 1-8.

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Optimisation of Organic Rankine Cycles (ORCs) for binary cycle applications could play a major role in determining the competitiveness of low to moderate renewable sources. An important aspect of the optimisation is to maximise the turbine output power for a given resource. This requires careful attention to the turbine design notably through numerical simulations. Challenges in the numerical modelling of radial-inflow turbines using high-density working fluids still need to be addressed in order to improve the turbine design and better optimise ORCs. This paper presents preliminary 3D numerical simulations of a radial-inflow turbine working with high-density fluids in realistic geothermal ORCs. Following extensive investigation of the operating conditions and thermodynamic cycle analysis, the refrigerant R143a is chosen as the high-density working fluid. The 1D design of the candidate radial-inflow turbine is presented in details. Furthermore, commercially-available software Ansys-CFX is used to perform the 3D CFD simulations for a number of operating conditions including off-design conditions. The real-gas properties are obtained using the Peng-Robinson equations of state. The preliminary design created using dedicated radial-inflow turbine software Concepts-Rital is discussed and the 3D CFD results are presented and compared against the meanline analysis.

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ID Code: 74693
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: CFD, Radial-Inflow Turbine, Geothermal Energy
DOI: 10.1115/POWER2014-32158
ISBN: 978-0-7918-4609-4
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Computational Fluid Dynamics (091501)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > OTHER ENGINEERING (099900) > Engineering not elsewhere classified (099999)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 ASME
Deposited On: 05 Aug 2014 02:07
Last Modified: 19 Mar 2015 10:50

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