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Review: State of the art parabolic trough technology and the way moving forward
Solar Thermal Energy Research Group (STERG)University of Stellenbosch
R N LaurieMEng candidate
Supervisors: Prof Frank Dinter & Dr Jaap Hoffman
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• Specialized geometry– Mirror reflectors (silver coated glass mirror/glass-free
panels)
• Reflect and concentrate rays of sun• HCE absorbs thermal energy
– Fluid usually oil
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First PTC 1870
PTC with DSG 1907
Irrigation plant 1912
Gaining popularity 1970’s
SEGS I-VI 1980
EuroTrough2002
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SGX-2, SNT-0 2005
AstrO2007
HelioTrough2009
SkyTrough2010
E-2 2011
UltimateTrough, SNT-2 2013
SpaceTube2014
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• Structure– Torque box
– Torque-tube
– Space frame
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• Torque-box– More rigid structure– More expensive assembly process
• Torque-tube– Less rigid structure (bending due to gravity & wind loading)– Less assembly costs
• Space frame– No jig required for assembly
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• Approximately 5 GW of installed STE worldwide• Parabolic troughs make up 4.1 GW• More accurate collectors
– Higher CRgeometrical, IF
• Larger collectors• More cost-effective collectors
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• SENERTrough-2 (SNT-2)• SpaceTube• SkyTrough
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• South Africa has 5 parabolic trough plants
• 450 MW
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• Matured technology– Tried and tested
• Reduce costs– Less cost intensive manufacturing processes– Alternative materials– Alternative structural designs
• Increase system efficiency– Molten salt as HTF
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ACKNOWLEDGEMENTS:
CONTACT DETAILS:
visit us: concentrating.sun.ac.za
Solar Thermal Energy Research Group (STERG)Stellenbosch University South Africa
R N Laurie