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Ocean thermal energy conversion (OTEC) uses warm surface water to produce steam (using either ammonia or a vacuum) to generate electricity. Cooler deep water then cools the system and the cycle continues. Enough electricity is produced to drive the pumps and the excess is exported to the grid.

Advantages:

  • Generates electricity with no greenhouse emissions.
  • Totally renewable energy.
  • Works day and night with only routine pump maintenance and little ongoing costs.
  • Open system version produces desalinated water as well.
  • Unlimited source of free energy especially in tropical waters.

Disadvantages:

(are few)

  • Needs a large difference in temperatures (surface and deep) for best results.
  • Needs to be close to the national grid.
  • Needs a constant supply of warm and cold water, so only suitable for tropical locations.
  • Plant needs safe location from storms and surf.
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13y ago

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