Supercritical CO2 radial turbine design performance as a function of turbine size parameters

Qi, Jianhui, Reddell, Thomas, Qin, Kan, Hooman, Kamel and Jahn, Ingo H. J. (2016). Supercritical CO2 radial turbine design performance as a function of turbine size parameters. In: Proceedings of ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, Seoul, South Korea, (58137.1-58137.14). June 13-17, 2016. doi:10.1115/GT2016-58137


Author Qi, Jianhui
Reddell, Thomas
Qin, Kan
Hooman, Kamel
Jahn, Ingo H. J.
Title of paper Supercritical CO2 radial turbine design performance as a function of turbine size parameters
Formatted title
Supercritical CO2 radial turbine design performance as a function of turbine size parameters
Conference name ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
Conference location Seoul, South Korea
Conference dates June 13-17, 2016
Convener International Gas Turbine Institute
Proceedings title Proceedings of ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
Journal name Proceedings of the ASME Turbo Expo
Place of Publication New York, NY, United States
Publisher American Society of Mechanical Engineers (ASME)
Publication Year 2016
Sub-type Fully published paper
DOI 10.1115/GT2016-58137
Open Access Status Not yet assessed
ISBN 9780791849873
Volume 9
Start page 58137.1
End page 58137.14
Total pages 14
Language eng
Formatted Abstract/Summary
Supercritical CO2 (sCO2) radial inflow turbine are an enabling technology for small scale concentrated solar thermal power. They are a research direction of the Australian Solar Thermal Research Initiative (ASTRI). This study uses the 1D meanline design code TOPGEN, to explore the radial turbine design space under consideration of sCO2 real gas properties. TOPGEN maps a parametric design space defined by flow and head coefficient.

The preliminary design code is used explore the feasibility, geometry and performance of sCO2 turbines in the 100kW to 200kW range in order to assess feasible design spaces and to investigate turbine scaling. Turbines are scaled with respect to power, while maintaining specific speed constant and with respect to speed. This analysis shows that both scaling approaches change the feasible design space and that both geometric constraints such as blade height or operational constraints such as blade natural frequency can significantly limit the design space.

Detailed analysis of four shortlisted designs shows that turbine efficiencies close to 85% can be attained for 100kW and 200kW output powers, even when operating at reduced rotor speeds. This work provides new insight towards the design of small scale radial turbines for operation with sCO2 and highlights scaling issues that may arise when testing sub-scale turbine prototypes.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Mechanical & Mining Engineering Publications
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Created: Sat, 15 Oct 2016, 02:59:52 EST by Ingo Jahn on behalf of School of Mechanical and Mining Engineering