Feasibility of ocean wave electrical power generation

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Discussion Overview

The discussion revolves around the feasibility of generating electrical power from ocean waves, specifically focusing on a technology proposed by a firm that claims to be able to meet California's power needs with an offshore installation. Participants explore various aspects of this technology, including its scalability, material concerns, environmental impacts, and operational limitations.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant highlights the potential of a 100 square mile offshore installation to generate power for California, questioning the scalability of individual buoys to reduce the number needed at sea.
  • Corrosion is identified as a significant concern for the durability of the technology in marine environments.
  • Another participant mentions the availability of special structural materials and coatings designed for marine conditions, suggesting these could mitigate corrosion issues.
  • Questions are raised about the depth of water required for deployment, with a specific mention of the buoy being designed for approximately 100 feet (30 meters) of water.
  • Participants express curiosity about the power limits of the design and the factors that may restrict its use at different depths.
  • Environmental assessments are mentioned as a prerequisite for deployment, with some participants assuming that potential impacts on local currents would be included in these assessments.
  • Concerns are voiced about the limitation of the 100-foot depth, suggesting it may leave significant portions of the ocean untapped.

Areas of Agreement / Disagreement

Participants express various concerns and questions about the technology, indicating that there is no consensus on its feasibility or potential limitations. Multiple competing views regarding the effectiveness and environmental impact of the proposed technology remain unresolved.

Contextual Notes

Participants note limitations related to the depth of deployment and the potential environmental impacts, but these aspects remain unresolved and are dependent on further assessments and definitions.

Cliff_J
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Rather than clutter the FEG thread, here's different idea along the same lines of renewable electrical power generation. Featured on "Discoveries This Week" on Discovery channel, the reps from this firm claim they can generate the power needs of CA from a 100 sq mile installation offshore, and that it scales up from there.

http://www.oceanpowertechnologies.com/technology/

I think its neat that they are able to utilize current tech for mooring/anchoring, but would have to wonder if it could be scaled up at each 'buoy' to avoid having to place millions at sea.
 
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Obviously one real concern here is corrosion.

Whewwww, FEGs have me all designed out at the moment. :biggrin:
 
There are special structural materials like marine steels and some clad steels thought could be used. Plus there are coatings designed for the marine (oxygenated saline) environment.

One issue would be the effect on local currents. Presumably that's been addressed already.
 
From the link:
How deep is the water in which the system is installed?

The buoy is designed to be deployed in approximately 100 feet (30 meters) of water.

What is the power limit for this design, that is, given the efficiency and the number of miles of accessable coastline. I wonder what factors limit use at other depths.
 
The website claims that environmental assessments are done before deployment, I guess an assumption could be made that affects on current and so on are going to be encompassed by that assessment.

I thought the 100ft was a bit of a limitation too. It would seem to leave a lot of ocean left untapped, and large part of the ocean not likely used by mankind or nature (surface waters anyways).
 

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