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Ocean Power Technologies, Inc. Message Board

  • jim6b jim6b Oct 19, 2011 12:25 PM Flag

    OPTT Highest Cost Producer

    OPTT is the highest cost producer per Bloomberg report.

    Using weight ratios as proxie for cost, Ocean Power Technologies has the highest cost.

    Carnegie Wave Energy (CETO)_____ 3.8 kW/tonne
    AWS Ocean Energy ___________ 2.1 kW/tonne
    Wavebob _________________ 1.6 kW/tonne
    Ocanlinx _________________ 1.3 kW/tonne
    Pelamis _________________ 1.2 kW/tonne
    Aquamarine (Oyster) ________ 1.0 kW/tonne
    Ocean Power Technologies ____ 0.6 kW/tonne

    For details see below at p. 7

    SortNewest  |  Oldest  |  Most Replied Expand all replies
    • The Power to weight, or mass ratio is not appropriate for power comparisons using different technologies. For instance, CETO is using a hydraulic actuator device, submerged near shore to pressurize seawater, that is then pumped up a long distance to accumulators, valves and ultimately to a turbine. Do you think they are weighing all of this equipment, or taking into account its design components? No they are not. They are just comparing the 'in water' materials, and not the also required 'on land' materials. Thus the comparison is not valid. Then, even if there is some degree of cost analysis that could be gleaned from a weighting approach, you must consider material types, use, and industrialized processes such as machining, which increase costs. For instance, using higher amounts of stainless steels, or more intricate piping and valving, versus simpler carbon steels, polycarbonates, or less machined parts, less complexity, means lower cost, for same weight analysis. Again, this cost method leaves much to be desired, and definitely cannot be used across diverse WEC technologies.
      Specifically, for CETO, not even mentioning the tonnes of highpressure piping that is prone to leakage, I have another problem that I don't think they have been able to address adequately: Support anchor bolt metal fatigue. Think of a coat hanger bent back and forth. What happens over time? These anchor bolts are under water, costly to inspect/replace needing divers etc.

    • Up 10% today jimbo!!!!!


      You seem worried. Too bad you didnt buy at $2.75 like yo said you would......OOOOOOOOOOPS!!!!

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