The wake effect: Offshore wind farms can 'steal' wind from one another
Offshore wind farms can reduce the availability of downstream wind resources of other farms by as much as 20% within 50 kilometers, due to so-called wake…
Green energy is taking a beating lately. Ignore the headline of this article, as it suggests it is only about 2 US offshore wind projects being abandoned, but it is more than that.
I have been a big advocate of green energy for longer than I can remember. Eventually...I have no doubt It will come to dominate energy production. Much later than we hope though, if LENR does not come through for us.
Australian tech to be used for a greenhouse. Maybe it will power business using the sunlight coming through the windows
October 31, 2023 – Watsonville, California– ClearVue Technologies Limited (ASX: CPV), a smart building materials company, will deliver solar glazing to System USA, Inc. (Greenhouse System USA Inc.) of Watsonville, California (System USA) for a greenhouse project expected to provide approximately 82 kW of solar power and producing an estimated 107,000 kWh annually.
"Just as an engineer designs a radio antenna with a specific shape and size to transmit over a certain wavelength in a certain direction, we can design an emitter using a library of materials, each with a specific shape and size, to adjust the wavelength band and direction for heat radiation. The better we do this, the more heat the emitter ejects into space and the colder the emitter can get."
Here’s some information from Australia about the window solar cells and a brochure from the ClearVue group
This article says overall CO2 emissions declined this year. It also shows that wind and solar together produced 17% of electricity, which is more than coal at 15%.
Interesting piece on the enthusiasm for small modular fission reactors.
Wind power in Germany yesterday did produce 58%
It might take a bit longer in Japan.1935??
.even though the replacement of fossil fuel imports alone
makes it worthwhile..
Mitsubishi etc have turbines... maybe the government need to get up to speed...
Overall, to stay on track for net-zero using a combination of CCS and renewable energy technologies requires Japan double the rate of investment through 2050 for an annual average of $US239 billion, or around 3.8% of expected GNP.
This might sound like a lot, but as David Kang, head of Japan and Korea research at BNEF explains, “Japan spent $1.8 trillion on fossil fuel imports over 2010-2022, equivalent to an annual average spending of more than 3% of GDP.
While already in the record books for being the world’s largest, a wind turbine based off the coast of Fujian Province in China has achieved another incredible milestone.
Set on the Zhangpu Liuao Phase 2 offshore wind farm, the wind turbine’s rotor diameter is about 827 feet, while the turbine’s hub is 479 feet high, Electrek reported.
During Typhoon Haikui, the mammoth installation was able to generate 384.1 megawatt-hours of electricity in the span of a day, which would be enough to power around 170,000 homes, according to South China Morning Post.
While wind speeds of 53 miles per hour would usually see a wind turbine lock its blades to prevent the system from overloading, the
Goldwind’s GWH252-16MW turbine has an intelligent system that allows it to adjust its blades to account for the conditions, meaning there is no loss of power generation, as Electrek reported based on South China Morning Post’s assessment.
“We are closely monitoring critical components like the main control programme, pitch system and generators to gradually lift power restrictions while ensuring operational safety,” a spokesperson for Goldwind told the South China Morning Post, per The Independent.
Germany 2022 for one year did produce 56% renewable current over all !!
Windmills don't have a large foot print? I'd say those windmills are sited too close together. You can't take energy out of the air stream without slowing it down, so the performance of a close downstream mill will be reduced. You can also affect microclimates.
Windmills don't have a large foot print? I'd say those windmills are sited too close together.
The footprint in fact is large on shore. You clearly hear the bruuu sound for several hundred meters distance. It's like sitting in a plane at 12'000 meters and listening to the sound of side air flow.
Two days ago we did hike uphill to a wind farm of about 30 - today low power - turbines of 50..60 meters total height. The two close to the mountain peek did not run even with enough wind available for 7 others a few meters downward sitting on the crest. So there are bad places for mills also. Only along a flat terrain there is constant flow.
Stealing wind is also possible but aerodynamics show that flux evades an obstacle and joins again at a certain distance. So look at offshore pictures where we see large distances between mills and often a honeycomb pattern to minimize the effect.
Windmills don't have a large foot print?
They have a small footprint in the sense that the land area taken up by the base of the tower is small compared to other generator types. They take up the space of a shed or small barn and they produce 1 or 2 MW. A coal fired plant takes up a tremendous amount of space when you include the railroad needed to bring the coal. A third or more of the railroad traffic near a coal plant is devoted to coal. You wouldn't even need many railroads without coal fired plants. Gas fired plants take a up a lot of space with the pipelines. The pipes are underground but you cannot build on top of them. The use of the land is restricted. I think more restricted than the land around a wind turbine.
Not only is the tower base small, but it can be placed in a field and the rest of the land can be farmed. The tower does not disrupt the surroundings. It does not need rail traffic constantly coming in to refuel it.
Of course the towers take up a lot of space in the sky. But they are erected in places where that does not matter. Not where there are tall buildings or airplanes landing.
The power cables from them are run underground to the nearest high voltage powerline.
I'd say those windmills are sited too close together. You can't take energy out of the air stream without slowing it down, so the performance of a close downstream mill will be reduced.
I doubt they are too close. Every engineer has known about that problem since ancient times. Sailing ships were known to "steal the wind." During yacht races they do this deliberately to slow down their rivals. If towers seem close together it is probably because they are lined up 90 degrees from the path of prevailing winds.
A third or more of the railroad traffic near a coal plant is devoted to coal. You wouldn't even need many railroads without coal fired plants.
Here is a more accurate assessment:
Rail transportation and coal-fired power generation are heavily interdependent, with railroads accounting for 70 percent of coal shipments to power plants, and coal accounting for about 20 percent of rail business.
Alternative shipping methods include truck, barge, and conveyor. Truck shipping is considered uneconomical beyond 50 miles; barges are limited by the reach of navigable waterways; conveyors only work in cases where the mine is adjacent to the plant.
In March 2011, America's major freight railroads said they plan to invest $12 billion in their networks in 2011, but may change their plans depending upon impending coal regulations. It 2010 coal accounted for 45% of all carload traffic in the United States.
It says 20% of business but 45% of carload traffic. I guess that means coal carloads get a discount? The decline of coal has hit the railroads hard. Here is a photo of locomotives sidelined by the decline in coal consumption. Imagine how much money those locomotives cost collectively!