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Scotland to House Largest Tidal Turbine

digit.fyi

11–20 of 21 posts

Re: Scotland to House Largest Tidal Turbine

#11
post #2

Apparently this is a 2MW turbine https://simecatlantis.com/2018/09/13/simec-atlantis-energy-u...

Isn't 1,5 - 2MW much the same amount a standard onshore wind turbine would provide? I assume the tidal power generation must have some advantages (e.g. more constant output?)

I don't think it's the fact that it's constant, as it's predictable - you know when the tides will happen, unlike wind where you might have a week of low wind.

Re: Scotland to House Largest Tidal Turbine

#12
post #2

Apparently this is a 2MW turbine https://simecatlantis.com/2018/09/13/simec-atlantis-energy-u...

Isn't 1,5 - 2MW much the same amount a standard onshore wind turbine would provide? I assume the tidal power generation must have some advantages (e.g. more constant output?)

Due to our shitty politics we don’t do onshore wind anymore.

Re: Scotland to House Largest Tidal Turbine

#14
post #4
post #3

Here's a description of an earlier attempt, https://www.smithsonianmag.com/innovation/inside-worlds-firs... All the press releases and articles describing work in the Pentland Firth are breathlessly optimistic. The environment here is fantastically unkind to marine equipment and at least one previous project (can't recall or find the details) was destroyed in a very short time. To give you an idea, the current at Dun…

What are your thoughts on the project as someone familiar with the area? Good, bad, mixed? As an outsider, it seems that Scotland is leading the world in offshore wind, which is someone Scottish Engineers could export to many other places. I see it as exciting.

It's a resource that's hard to ignore. There are good electricity grid connections nearby because of the, now decommissioned, fast-breeder reactor at Dounreay. It's a hellishly difficult place to work but that's kind of the point - if the technology can be made to work here then it will work anywhere.

There's a long history of marine engineering in the country. There's a lot of good expertise here and the Scottish government sees renewables and the associated technology to be a good export opportunity for the country. It would be great if the country to take the experience gained in the oil industry and use it in more environmentally friendly ways (if you ignore all the fish that the tidal turbines will be turning into an all you can eat sushi buffet for the local gulls).

Re: Scotland to House Largest Tidal Turbine

#15
Tidal power is very challenging. Tidal stream devices like this have a very high LCOE (levelized cost of energy) because the stresses on them are massive so they are built like tanks but capture little of the energy flowing past them. Tidal range designs like La Rance (https://en.wikipedia.org/wiki/Rance_Tidal_Power_Station) are significantly more economic, but actually developing them and building them due to the size they need to be to be economic presents a major headwind for developers. There is huge potential globally for this but the will from investors and governments to really focus on it hasn't been there. These are mega-engineering projects with big risks, so capital flows to simple solar and wind instead.

Re: Scotland to House Largest Tidal Turbine

#17

Earlier quoted context omitted.

Isn't 1,5 - 2MW much the same amount a standard onshore wind turbine would provide? I assume the tidal power generation must have some advantages (e.g. more constant output?)

I don't think it's the fact that it's constant, as it's predictable - you know when the tides will happen, unlike wind where you might have a week of low wind.

Actually wind and sun are very predictable, but intermittent.

The main benefit, I think, is having multiple generation sources as these will smoothen out any power drops from other sources.

Re: Scotland to House Largest Tidal Turbine

#18
post #3

Here's a description of an earlier attempt, https://www.smithsonianmag.com/innovation/inside-worlds-firs... All the press releases and articles describing work in the Pentland Firth are breathlessly optimistic. The environment here is fantastically unkind to marine equipment and at least one previous project (can't recall or find the details) was destroyed in a very short time. To give you an idea, the current at Dun…

I got the ferry from Stromness to Scrabster once. A low pressure arrived on the scene just as we departed Stromness. About a quarter of a way into the journey I decided I'd like a coffee, I wished I hadn't. I swear at one point, as we rolled over the crest of one wave, I experienced weightlessness, as did the contents of my disposable cup. It must be one of the very few times on public transport I've had to "clambour" back to my seat. I remained seated for the rest of the trip.

Re: Scotland to House Largest Tidal Turbine

#19
post #14
post #4

Earlier quoted context omitted.

What are your thoughts on the project as someone familiar with the area? Good, bad, mixed? As an outsider, it seems that Scotland is leading the world in offshore wind, which is someone Scottish Engineers could export to many other places. I see it as exciting.

It's a resource that's hard to ignore. There are good electricity grid connections nearby because of the, now decommissioned, fast-breeder reactor at Dounreay. It's a hellishly difficult place to work but that's kind of the point - if the technology can be made to work here then it will work anywhere. There's a long history of marine engineering in the country. There's a lot of good expertise here and the Scottish go…

> here are good electricity grid connections nearby because of the, now decommissioned, fast-breeder reactor at Dounreay

That and the recent 400kV upgrade of the Beauly to Denny high voltage transmission line to provide additional capacity for renewable energy sources:

https://en.wikipedia.org/wiki/Energy_policy_of_Scotland#Beau...

Re: Scotland to House Largest Tidal Turbine

#20
post #2

Apparently this is a 2MW turbine https://simecatlantis.com/2018/09/13/simec-atlantis-energy-u...

Isn't 1,5 - 2MW much the same amount a standard onshore wind turbine would provide? I assume the tidal power generation must have some advantages (e.g. more constant output?)

Here in the Netherlands at least standard onshore windturbines are in the 2-4MW range (but up to 8MW is installed), and offshore 7-10MW is now standard.
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