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Author Topic: Tidal lagoon dragon  (Read 195 times)
Countrypaul
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« on: June 30, 2020, 08:13:12 PM »

https://www.bbc.co.uk/news/uk-wales-53224180

Not sure if this is just trying to keep the subject in the press or if it is really something new.
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azps
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« Reply #1 on: July 01, 2020, 01:51:13 PM »

https://www.bbc.co.uk/news/uk-wales-53224180

Not sure if this is just trying to keep the subject in the press or if it is really something new.

By significantly reducing the water stored in the lagoon, displacing it with this island, it would significantly reduce the energy the lagoon produces, right? So the economics go from very bad to quite a lot worse.
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Countrypaul
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« Reply #2 on: July 01, 2020, 04:11:40 PM »

https://www.bbc.co.uk/news/uk-wales-53224180

Not sure if this is just trying to keep the subject in the press or if it is really something new.

By significantly reducing the water stored in the lagoon, displacing it with this island, it would significantly reduce the energy the lagoon produces, right? So the economics go from very bad to quite a lot worse.

Since the islands are floating the amount displaced may be significantly less than if they were built up from the lagoon bed, but either way the energy produced by the lagoon woud be reduced - agreed. The economics of the project would however might just be completely different as building thousands of homes on the islands would provide an income as well as that from the tidal energy. They also seem to be intending to install significant PV to also generate power (as usual no real use in winter though) which would also prodice a revenue stream. I'm left feeling that the tidal lagoon producing power might be almost a side issue to the property development part.
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Philip R
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« Reply #3 on: July 01, 2020, 06:20:48 PM »

I think it will not stand upto scrutiny. Just some local politician trying to make a name from himself at the UK taxpayers expense.(For the barrage bit at least) trying to do a Welsh Dagon version of the Dubai Palm islands.

Al those properties need building up on land sitting in salt water. Everything a few feet down will be saline or brackish.
Are the embankments to be made of concrete? If so, very high carbon, so undoing any green pretense.

The lagoon will be too small a volume of low head water wrt the lagoon wall length / cost to be worthwhile.

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