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From Denis Bone:

I eventually made it back to Nigeria and, even more eventually, managed to open your blog site, not really sure what a blog is or how it works but find it interesting.

Have a look at the website www.openhydro.com, they are making exactly the things I am talking about. I have written to them about the fact that they do not, in their documentation, make the case for the incidental benefit of having a large seabed 'trawler exclusion zone' around the installed turbines. This zone would allow the regeneration and protection of large areas of the seabed habitat for bottom dwellers and feeder that has been destroyed by continuous trawling. A major benefit for the world!

The other comment I would like to make is in response to the talk of the increased efficiency of wind turbines. These people are talking about mechanical efficiency that only applies when the wind is blowing. They ignore the fact in their calculations that when the wind is not blowing the turbines are, of course, zero percent efficient. The wind predictions are approximations at best. True efficiency figures should include the wind availability factor, either that or two sets of efficiency figures should be given, one for mechanical efficiency and one for time efficiency. As tidal flow is extremely predictable, precise figures can be calculated for the output of tidal turbines and, barring mechanical breakdown, can be relied upon.

Must go,

take care,

Regards,

Denis

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Denis Bone, Nigeria