Wind Turbines

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Witness
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Re: Wind Turbines

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Coal - free first for electricity in Great Britain

Coronavirus slump and sunniest spring on record send green energy soaring in England, Wales and Scotland

Great Britain’s electricity system recorded its “greenest” ever month in May after running without coal-fired electricity for a full calendar month.

The National Grid, the energy system operator, said the country’s sunniest spring on record helped generate enough solar power to reduce the carbon intensity of the grid to its lowest level ever recorded.

The bright and breezy weather helped wind and solar power make up about 28% of Great Britain’s electricity last month, narrowly behind gas-fired power generation, which made up 30% of the energy mix.

Meanwhile, the record low demand for electricity during the coronavirus lockdown has left little room for Great Britain’s last remaining coal power plants to play a role.

Since April Great Britain’s electricity system has run without coal-fired power for about 54 consecutive days, which has helped the carbon intensity of the electricity grid fall to the lowest average carbon intensity on record at 143 grams of CO2 per kilowatt-hour.

The lowest carbon intensity ever was recorded at 46g CO2/kWh on Sunday 24 May.
https://www.theguardian.com/business/20 ... month-ever
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Re: Wind Turbines

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Italy begins the first floating wind power plant in the Mediterranean

Italian developers have begun work on a 750-million-euro (840-million-U.S.-dollar) plan that would create the Mediterranean Sea’s first floating wind farm.

The so-called 7Seas Med project will involve 25 floating wind turbines producing up to ten megawatts of power each. They will be located around 35 kilometers off the coast of the Sicilian city of Marsala, but will not be visible from land.

Italian officials said it is necessary to invest in the kind of cutting-edge technology the wind farm represents, despite the drop in oil prices during the coronavirus pandemic that makes that energy source unusually inexpensive.

“An ambitious plan like this is an investment in the next 25 or 30 years, and so it has to look beyond a temporary drop in oil prices,” Edo Ronchi, a former Italian environment minister who is now president of the Foundation for Sustainable Development, told Xinhua.
https://www.evwind.es/2020/06/19/italy- ... nean/75240
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Rob Lister
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Re: Wind Turbines

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Witness wrote: Fri Jun 26, 2020 1:53 am
Italy begins the first floating wind power plant in the Mediterranean
...
The development of floating wind farms is based on a new technology, which allows the turbines to work in water too deep for turbines to be built into the seabed. That is the case in the area off the coast of Marsala, where the water is 300 meters deep. Offshore wind turbines cannot be effectively anchored into the seabed at depths of more than 50 meters.
:notsure:

Well, it's gotta be anchored to something, even if it's just the transmission cable itself. I'm not sure I'd want to put all of the stress on one cable, particularly one not designed to that specific end. The windward forces on that floating tower are not going to be trivial.

Image
http://citeseerx.ist.psu.edu/viewdoc/do ... 1&type=pdf

I'm going to chalk this up to poor reporting.

I wish them luck and good, honest bid process for their contractors.
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Re: Wind Turbines

Post by gnome »

Speaking from ignorance of specifics here, could they pushing against current or tidal forces?
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Re: Wind Turbines

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I won't go as far as to say that tidal forces here are negligible, or even trivial, but they are certainly swamped by wind forces capable of generating 10MW.
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Re: Wind Turbines

Post by gnome »

Ahhh, makes sense.

Here's another article--I think you're right about the bad reporting on the first--this one indicates that the floating kind would still be anchored.

https://news.northeastern.edu/2020/04/0 ... at-floats/
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Re: Wind Turbines

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Yes, they are anchored to the seabed. Some concrete box is towed in place, then sunk and filled with sand.

But it would be an interesting engineering problem to have the turbine stay in place dynamically: add propulsion + GPS. Probably not worth the hassle.
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Re: Wind Turbines

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Next up: Tethered rigid aerostat with biggest yet wind turbine to harness the jet stream. :coolspecs:
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Abdul Alhazred wrote: Sat Jun 27, 2020 12:33 am Next up: Tethered rigid aerostat with biggest yet wind turbine to harness the jet stream. :coolspecs:
They don't seem to stay in place:

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Re: Wind Turbines

Post by Abdul Alhazred »

Make the tether adaptable and let it wander. Or else fill the skies so there are always a few in the right place. :p
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Re: Wind Turbines

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Portugal ends coal burning two years ahead of schedule

Portugal is the third EU country this year to announce early closure of its last coal plants, as rising carbon costs and competition from gas and clean energy bite

Portuguese energy utility EDP has announced the closure of its Sines coal power plant, bringing forward the planned shutdown of coal-fired power plants in the country by two years, from 2023 to 2021.

In addition to Sines, the company is preparing to close one more plant and convert another unit in Spain, EDP said in a statement.

The decision is “part of EDP group’s decarbonisation strategy” and was taken in a context in which energy production increasingly depends on renewable sources, the company said on Monday (13 July).

The falling cost of renewables, coupled with the rising cost of CO2 pollution permits on the EU carbon market, means that “the prospects for the viability of coal plants have drastically decreased,” EDP added.
https://www.climatechangenews.com/2020/ ... -schedule/
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Offshore wind power now so cheap it could pay money back to consumers

Renewable energy projects, including onshore and offshore wind and solar farms, have so far been subsidised by government support schemes. This has led to some to complain that clean energy is pushing up bills.

However, the most recently approved offshore wind projects will most likely operate with ‘negative subsidies’ – paying money back to the government. The money will go towards reducing household energy bills as the offshore wind farms start producing power in the mid-2020s.

This is the conclusion of an analysis by an international team led by Imperial College London researchers published today in Nature Energy.

Lead researcher Dr Malte Jansen, from the Centre for Environmental Policy at Imperial, said: “Offshore wind power will soon be so cheap to produce that it will undercut fossil-fuelled power stations and may be the cheapest form of energy for the UK. Energy subsidies used to push up energy bills, but within a few years cheap renewable energy will see them brought down for the first time. This is an astonishing development.”
Details & links: https://www.imperial.ac.uk/news/200353/ ... uld-money/
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Re: Wind Turbines

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:?

Where does it get the money to pay back to the consumers?
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Re: Wind Turbines

Post by gnome »

I think in theory, by a net reduction in the subsidy, which (ha ha) translates to a lower tax cost.
"If fighting is sure to result in victory, then you must fight! Sun Tzu said that, and I'd say he knows a little bit more about fighting than you do, pal, because he invented it, and then he perfected it so that no living man could best him in the ring of honor. Then, he used his fight money to buy two of every animal on earth, and then he herded them onto a boat, and then he beat the crap out of every single one. And from that day forward any time a bunch of animals are together in one place it's called a zoo! (Beat) Unless it's a farm!"
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Re: Wind Turbines

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I think gnome nailed it. :mrgreen:
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Re: Wind Turbines

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Crown Estate grants leases for floating windfarm off Wales

Erebus project in Celtic Sea adds to Queen’s multi-million windfall through expected auction of offshore leases

The Queen’s property managers have given the green light to the first floating offshore windfarm to be built off the coast of Wales, as the UK’s wind industry prepares to power into the Celtic Sea.

The Crown Estate granted two new leases for windfarms in Welsh waters on Wednesday, including the seabed rights for a demonstration project that involves installing floating wind turbines 27 miles from the shore.

The 96MW Erebus project marks a big step for the development of offshore wind off the Welsh coast, and could emerge as one of Britain’s first floating windfarms beyond Scotland, where one is under construction and another planned.

The Crown Estate, which holds the rights to seabeds around the British Isles, encompassing Wales, England and Northern Ireland, has also granted rights for a 10,600 hectare extension to the Gwynt y Môr offshore windfarm off the coast of north Wales, which could provide power of up to 576MW, helping Wales meet climate targets.
https://www.theguardian.com/environment ... -off-wales
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Re: Wind Turbines

Post by Abdul Alhazred »

Floating? That means it can be stolen.

I just got a great idea for a James Bond movie. 8)
Last edited by Abdul Alhazred on Fri Aug 28, 2020 12:09 am, edited 1 time in total.
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↑ We sure need another improbable Hollywood action movie. :mrgreen:
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Portuguese government confirms world record solar price of $0.01316/kWh

The Portuguese government has revealed some of the preliminary results of the national solar auction which closed on Tuesday. Antonio Delgado Rigal, chief executive of energy forecasting service Aleasoft, said that the 15-year contracts awarded in the auction were the key to understanding the reason of such a low price. This, combined with the rights for land and grid connection guaranteed by the auction, makes attractive bidding at low prices.
https://www.pv-magazine.com/2020/08/27/ ... 01316-kwh/ for details.
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Re: Wind Turbines

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Abdul Alhazred wrote: Sat Jun 27, 2020 12:33 am Next up: Tethered rigid aerostat with biggest yet wind turbine to harness the jet stream. :coolspecs:
Right. :D

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