The University of Queensland refrigerant and supercritical CO2 test loop

Twomey, Braden, Nagy, Andras, Russell, Hugh, Rowlands, Andrew, Czapla, Jason, Singh, Rajinesh, Ventura, Carlos A de M and Jahn, Ingo (2016). The University of Queensland refrigerant and supercritical CO2 test loop. In: Proceedings of ASME Turbo Expo 2016: Power for Land, Sea and Air. ASME Turbo Expo 2016, Seoul, South Korea, (58110.1-58110.11). June 13-17, 2016. doi:10.1115/GT2016-58110


Author Twomey, Braden
Nagy, Andras
Russell, Hugh
Rowlands, Andrew
Czapla, Jason
Singh, Rajinesh
Ventura, Carlos A de M
Jahn, Ingo
Title of paper The University of Queensland refrigerant and supercritical CO2 test loop
Conference name ASME Turbo Expo 2016
Conference location Seoul, South Korea
Conference dates June 13-17, 2016
Convener International Gas Turbine Institute
Proceedings title Proceedings of ASME Turbo Expo 2016: Power for Land, Sea and Air
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/GT2016-58110
Open Access Status Not yet assessed
ISBN 9780791849743
Volume 3
Start page 58110.1
End page 58110.11
Total pages 11
Language eng
Formatted Abstract/Summary
The use of organic refrigerants or supercritical CO2 (sCO2) as a working fluid in closed loop power cycles has the potential to revolutionise power generation. Thermodynamic cycle efficiency can be improved by selecting bespoke working fluids that best suit a given combination of heat source and heat sink temperatures, but thermal efficiency can be maximised by pairing this with a custom made turbine. This work describes the development and design of a new 100kW thermal laboratory-scale test loop at the University of Queensland. The loop has capabilities for characterising both simple and recuperated refrigerant and sCO2 organic Rankine cycles in relation to overall cycle performance and for the experimental characterisation of radial inflow turbines. The aim of this facility is to generate high quality validation data and to gain new insight into overall loop performance, control operation, and loss mechanisms that prevail in all loop components, including radial turbines when operating with supercritical fluids. The paper describes the current test loop and provides details on the available test modes: an organic Rankine cycle mode, a closed loop Brayton cycle mode, and heat exchanger test mode and their respective operating ranges. The bespoke control and data acquisition system has been designed to ensure safe loop operation and shut down and to provide high quality measurement of signals from more than 60 sensors within the loop and test turbine. For each measurement, details of the uncertainty quantification in accordance with ASME standards are provided, ensuring data quality. Data from the commissioning of the facility is provided in this paper. This data confirms controlled operation of the loop and the ability to conduct both cycle characterisation tests and turbomachinery tests.
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: Fri, 14 Oct 2016, 19:42:03 EST by Ingo Jahn on behalf of School of Mechanical and Mining Engineering