Kevin Bodge, Ph.D., P.E. - Florida Shore and Beach … · 2018-02-23 · Pelamis wave energy...
Transcript of Kevin Bodge, Ph.D., P.E. - Florida Shore and Beach … · 2018-02-23 · Pelamis wave energy...
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Kevin Bodge, Ph.D., P.E.SHORE
PROTECTION THROUGH
ALTERNATIVE ENERGY DEVICES
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Are there engineering works that jointly protect the shoreline (reduce
beach erosion) and serve as alternative sources of electric energy?
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wave energy converter devices
Pelamis wave energy converter
Agucadoura, Portugal
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Pelamis wave energy converter
Agucadoura, Portugal
3 converters @ 750 kw each
590-ft long, 12-ft diameter per unit
Installed: September 2008
Removed: November 2008due to mechanical problems
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Pelamis “snake-type” wave energy converter
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Conventional breakwater for shore protection
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Ocean Power Technologies
PB4ONJ Powerbuoy
3000-ft offshore, 100-ft water
>183 days operation; grid-connected
Kaneohe Bay, Oahu, Hawai’I
Deployed: 14 December 2009
Concept Illustration
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AWS Ocean Energy Ltd.
Archimedes Wave Swing
Concept sketch
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LIMPET
Land Installed Marine Power Energy Transmitter
500 kW; 3 concrete columns collect water waves in a shoreline recess in 20-ft water depth, and compress air.
Isle of Islay, Scotland
November 2000
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Wave Tower
Kvaerner Brug (and others)
350 & 500 kW systems
Both destroyed by storms, c. 1991
Toftestallen, Norway
1985-91, 1987-1991
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Poseidon Wave Generator
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Dam Atoll
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Dam Atoll
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Dam Atoll
erosion
erosion
accretion
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Oyster 1Wave Power Device
Scotland, U.K.
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Oyster Wave Power Device
Scotland, U.K.
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Oyster Wave Power Device
Scotland, U.K.
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Wing Wave Ocean Energy Generator
Florida Tech / SebaiCMET
Prototype: Ft. Pierce Florida
Deployed: November 2010
Destroyed within a few weeks(the wings were not found upon retrieval)
PICTURE HERE
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CONCLUSIONS
Alternative energy devices to create electrical power from ocean waves are not generally suitable for purposes of shore protection, at least upon an open coast.
Wave energy devices typically do not significantly block wave energy from reaching the shore (because of their size, location, orientation, submergence, or conformance with passing waves).
Devices that block wave energy would act as a breakwater and may possibly cause adverse impacts to adjacent shores on an open coast.
To‐date, many prototype devices in open water have been damaged by waves and failed.
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Kevin Bodge, Ph.D., P.E.SHORE
PROTECTION THROUGH
ALTERNATIVE ENERGY DEVICES