Ongoing maintenance costs are expected to be modest, as they are with other large-scale marine infrastructures, e.g. What’s more, future design improvements, performance/cost optimisations and learning effects could radically alter the relative weight of certain cost categories.Ĭapital cost breakdown for installation of a particular tidal stream energy device in a tidal stream farm of a certain size In fact, there are considerable variations between different device types and project locations. Note that this pie chart – which corresponds to a specific tidal stream energy device installed in a tidal stream farm of a certain size in a specific location – should not be taken as typical of tidal stream technologies as a whole. The structural costs are considerable, but in this case the largest cost item relates to the energy conversion systems. The figure below shows the breakdown of installed costs for a tidal stream device. For maintenance, access in channels such as the Pentland Firth will be difficult and potentially dangerous, as will large equipment handling support Operating costs for all marine turbines are likely to be substantial.For any design requiring barges, floating cranes or jack-up rigs, costs will rapidly escalate
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