Re:Reinvented wind turbine generates five times more energy ...
by hollasch on Saturday September 04, 2021 @02:35PM
(#28417806)
> In ideal conditions, where the wind is at its strongest, one wind catcher unit could produce up to 400 gigawatt-hours of energy. By comparison, the largest, most powerful wind turbine on the market right now produces up to 80 gigawatt-hours.
Up to now, I was under the impression that wind turbines produced energy, but apparently they just store it. [eyeroll]
Seriously, looking up the specs on the turbine they're comparing against, the actual advertised units are 80GWh per year. I imagine that these units are chosen to reflect the cumulative result of a variable power source plus any required downtime.
If you wanted to compare these against continuous power sources (nuclear, natural gas, coal), then the 80GWh/y is equivalent to 9.1MW, and the 400GWh/y is equivalent to 45.6MW. So you'd need about 22 of these new units to have an annual output equivalent to a single 1GW nuclear plant.
Re:Reinvented wind turbine generates five times more energy ...
by PhantomGremlin on Saturday September 04, 2021 @07:49PM
(#28420487)
I haven't done the math, and I could be way off, but probably 22 square miles of solar panels could replace a nuclear plant. At probably less cost, considering that the latest nuclear plant (perhaps the last to ever be built in the USA) is projected to cost over $27 Billion.[1] Billion with a B.
PV solar has, unfortunately, the same problem as windmills. How do you store the energy for a "rainy day" (heh heh)? Nuclear plants are pretty good at operating in rainy weather and at night.
Re:Reinvented wind turbine generates five times more energy ...
by PhantomGremlin on Sunday September 05, 2021 @02:52AM
(#28422112)
Nice link.
Loosely speaking, that park is about equal to a nuke (most nuke plants are in the range of 800 to 1000 MWe). At about 5% of the cost of the Southern Energy nuclear plant I mentioned. (pedantic note: I think of a "nuke" as a single reactor, the Southern plant actually has two. Many nuclear plants are twins).
Now if only we could get that pesky energy storage thing figured out. About 14,000 adjacent acres of Li batteries ought to do it, right? :-) Or maybe we just put the batteries under the solar cells?
Re:Reinvented wind turbine generates five times more energy ...
by 7952 on Saturday September 04, 2021 @03:30PM
(#28418288)
I think these units are used because it gives a more favourable comparison to existing turbines. It demonstrates that a developer could make more money. Nameplate capacity alone is probably not comparable when the power curve is so different to a normal turbine.
A big factor could be how closely they can be spaced compared to traditional turbines. I guess wake effects would be very different.
Re:Reinvented wind turbine generates five times more energy ...
by SeriousM on Saturday September 04, 2021 @04:39PM
(#28418916)
> Heggheim explains that traditional turbines are 120 feet long and usually max out at a certain wind speed. By comparison, the Wind Catcher’s blades are 50 feet long and can perform more rotations per minute, therefore generating more energy.
Re:Reinvented wind turbine generates five times more energy ...
by PhantomGremlin on Saturday September 04, 2021 @07:42PM
(#28420443)
In addition to the concerns already raised here, one other thing stuck out to me: the whole system is easier to manufacture, build, and maintain. Heggheim says it has a design lifespan of 50 years
My naive feeling is that it's extraordinarily difficult to design for 50 year lifespan in an environment as hostile as the North Sea. This isn't a naval vessel. You can't just keep slapping fresh coats of paint over everything.
Am I wrong? Wouldn't salt ions, seawater, trace sea minerals, etc eventually just permeate everything?
Re:Reinvented wind turbine generates five times more energy ...
by ithkuil on Saturday September 04, 2021 @04:23PM
(#28418760)
> "If you have one single turbine and you need to change the blade, you have to stop the whole operation,” says Ronny Karlsen, the company’s CFO. “We have 126 individual turbines, so if we need to change the blade, we can stop one turbine"
Up to now, I was under the impression that wind turbines produced energy, but apparently they just store it. [eyeroll]
Seriously, looking up the specs on the turbine they're comparing against, the actual advertised units are 80GWh per year. I imagine that these units are chosen to reflect the cumulative result of a variable power source plus any required downtime.
If you wanted to compare these against continuous power sources (nuclear, natural gas, coal), then the 80GWh/y is equivalent to 9.1MW, and the 400GWh/y is equivalent to 45.6MW. So you'd need about 22 of these new units to have an annual output equivalent to a single 1GW nuclear plant.
PV solar has, unfortunately, the same problem as windmills. How do you store the energy for a "rainy day" (heh heh)? Nuclear plants are pretty good at operating in rainy weather and at night.
[1] https://apnews.com/90bbe5cc8e3a1a6077b9e4318e2bbf7e
Coincidentally, that's the size of the largest solar park in the world -> https://en.m.wikipedia.org/wiki/Bhadla_Solar_Park
Loosely speaking, that park is about equal to a nuke (most nuke plants are in the range of 800 to 1000 MWe). At about 5% of the cost of the Southern Energy nuclear plant I mentioned. (pedantic note: I think of a "nuke" as a single reactor, the Southern plant actually has two. Many nuclear plants are twins).
Now if only we could get that pesky energy storage thing figured out. About 14,000 adjacent acres of Li batteries ought to do it, right? :-) Or maybe we just put the batteries under the solar cells?
A big factor could be how closely they can be spaced compared to traditional turbines. I guess wake effects would be very different.
Thats not how the energy equation works.
My naive feeling is that it's extraordinarily difficult to design for 50 year lifespan in an environment as hostile as the North Sea. This isn't a naval vessel. You can't just keep slapping fresh coats of paint over everything.
Am I wrong? Wouldn't salt ions, seawater, trace sea minerals, etc eventually just permeate everything?
It dwarfs land based high rise structures.. how stable it would be in gale force winds and storms of deep sea?
Sounds dangerous