CNM carnegie corporation limited

competition is fierce - apparently, page-10

  1. 1,225 Posts.

    Yes, the water particles move in circular orbits and since the BioWave frame does not elastically extend from its axis it can only access the energy available in the lateral (horizontal) direction. It is correct that there will be some relative motion of water to buoy radial to the axis when near the extremes of the oscillations. Good thinking DA. That is why the buoy has a streamlined shape. Such frictional losses should be rather small. Stacking three buoys per frame certainly multiplies the force on the pump and reduces the cost per anchor per MW. Conversely, with CETO the radial (longitudinal) component of the water orbit motion is the only thing that contributes to the energy extracted. With a single tie point and a spherical buoy the effect of any impact will tend to be minor. Is it feasible to consider putting 2 or 3 spherical buoys on one CETO pump?

    BioPower may be further ahead in their development than their website previously indicated. Since they are not listed there is no great need to provide up to date information and why put out latest ideas for others to pinch? (At least so wave power companies seem to think.) Hence it is hard to say how far they are behind in development. Lend Lease would probably also need to see proof of concept before committing big moneys.

    In any of these wave devices no one (company) really talks about the fraction of the wave energy absorbed nor the absorption aperture width per device. That would be a direct indication of efficiency and a figure of merit by which the different devices can be compared.

    Juke
 
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