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Options for Ocean-Based Energy 2 nd Maritime Business & Technology Summit

Options for Ocean-Based Energy 2 nd Maritime Business & Technology Summit. Frank R. Goodman, Jr. San Diego Gas & Electric Company November 16, 2010 San Diego, CA. Ocean Energy Options. Extraction of energy from ocean Wave energy Tidal energy Ocean thermal-gradient energy (OTEC)

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Options for Ocean-Based Energy 2 nd Maritime Business & Technology Summit

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  1. Options for Ocean-Based Energy2nd Maritime Business & Technology Summit Frank R. Goodman, Jr. San Diego Gas & Electric Company November 16, 2010 San Diego, CA

  2. Ocean Energy Options • Extraction of energy from ocean • Wave energy • Tidal energy • Ocean thermal-gradient energy (OTEC) • Ocean current energy • Ocean-based wind and solar energy

  3. Wave energy resource estimate for WA, OR, CA is 440 TWh/yr--EPRI and other sources Issues for San Diego region San Diego area is near the low end of what is available from wave energy, compared to further north on the West Coast Wave energy may be better further out Ocean current, ocean thermal energy, and tidal resources are modest in the immediate San Diego area Ocean Energy PotentialPhoto courtesy of Pelamis Wave Power

  4. Wind resources could contribute to energy needs of an offshore platform SDG&E has plans to field test a machine on Harbor Island Goal is to assess the economic viability in low winds Power available varies as the cube of wind speed Issues for San Diego region Would the winds be any better offshore? How far out would you have to go? Some inland areas have better winds Offshore Low-Cut-In-Speed Wind Turbines

  5. Solar resources could contribute to the energy needs of an offshore platform SDG&E is field testing 4 experimental solar concentrator systems Issues for San Diego region Sunlight improves as you move away from ocean Marine layer greatly limits amount of sunlight available at coast and at sea Offshore Solar Energy

  6. Added Options • Ocean Algae • Could use nutrients in waste water • Algae as a transportable fuel • Use osmosis to confine the growing area • Osmotic Power

  7. General Issues That Need to be Addressed for All These Technologies • Cost of energy • Rigorous business case needed • Environmental impacts need to be addressed • Aesthetic concerns • Ecological impacts • Impact on navigation and shipping • Can all the energy be used on a large floating platform? • Would there be a need to get energy to the mainland? • How would it be done? • Extra attention needed to making the equipment corrosion resistant • Example: A wind turbine that is designed only for inland use will not survive the corrosion at sea • Recyclability of the materials at end of life • Who will own the systems? Who will operate and maintain the systems?

  8. Questions?

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