An Organic Rankine Cycle as technology for Smaller ... · An Organic Rankine Cycle as technology...
Transcript of An Organic Rankine Cycle as technology for Smaller ... · An Organic Rankine Cycle as technology...
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An Organic Rankine Cycle as technology for Smaller Concentrated Solar Powered
Systems
1 B.Eng (Mechanical), Department Mechanical and Mechatronic Engineering, Stellenbosch University, STERG
2 Prof. Eskom Chair in CSP, Director of STERG, Stellenbosch University
3 Dr. Senior Lecturer Department of Mechanical and Mechatronic Engineering, Stellenbosch University, STERG.
Louis Karsten1, Frank Dinter2 and Jaap Hoffmann3
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• Motivation• Objectives• ORC maturity in CSP• Specific site in SA• Simulation • Conclusion
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• The real value of CSP
• Economic competiveness of CSP
• Why ORC?
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Proposed Thermal range of Rankine Cycles (Dickes, 2016)
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• Advantages of ORCo Turbine simplicityo No condensation on turbine bladeso Reduced maintenanceo Cheaper plant with less components
• Disadvantageo Low efficiency
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• Determine the technological maturity
• Identify an industry and site in Southern Africa
• Analyse and simulate an ORC with CSP
• Perform an over-head economic analysis
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• 1 MW APS Saguaro PT plant in Arizona, USA in 2006
• Smaller developments and other industries
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• Possible industrieso Industrialo Residential off-grid
• United Manganeseof the Kalahari(UMK)
Site (Google maps, 2017)
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• Model functional blockso Solar fieldo Storageo Power block
• Steady state and transient model
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• Steady state modelo Specify output (500kWe – 5MWe)o Neglect storageo Solar field analysiso Power block
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• Transient simulationo Specify output (500kWe – 5MWe)o Incorporate storageo Simulate over TMYo Calculate LCOE
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• The technology is very immature
• Mining site will be considered
• The future of ORC with CSP
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• Dickes, R. (2016). Solar-based ORC power systems. In ORC-Plus Workshop.
• Google maps, (2017). https://www.google.de/maps/place/Umk+Mine+Hotazel/
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ACKNOWLEDGEMENTS:
CONTACT DETAILS:
visit us: concentrating.sun.ac.za
Solar Thermal Energy Research Group (STERG)Stellenbosch University South Africa
Louis [email protected]