Wind power: for or against the wind?

[izentrop]

There remains the problem of aquifers

it may be concrete basements that are the most problematic. In the case of a large wind turbine, they can do up to 20 meters deep and represent 3 000 tons of reinforced concrete. Their presence is an environmental issue, because the obstacle often allows several levels of the water table, normally separated, to mix.

The German building code provides for their complete demolition. But this would rarely be the case in reality, because of the costs of hundreds of thousands of euros related to this measure. A more common practice, and officially tolerated, would be to dismantle them on the first two or three meters, even on one, then to cover them with soil. But that does not help the aquifers.

[Ahmed]

3000 tons of concrete and steel, that's a lot of coal ...

[moinsdewatt]

Complete repowering of a fleet of 30 MW old 23 equipped with 90 turbines of only 330 KW.
Which will be replaced by 8 turbines from 3 MW plus 4 turbines from 1.5 MW.

Wind energy in Spain: El Cabrito Wind Farm before and after being renovated

January 18, 2019 evwind

El Cabrito wind power plant, located at Tarifa (Cadiz), goes from ninety 330-kW wind turbines installed in 1995 to twelve 3-MW and 1.5-MW machines of Nordex technology.



Replacing 90 obsolete wind turbines installed 23 years ago with 12 of modern technology, while maintaining the same capacity (30 MW), increasing energy production by 16 and reducing the impact on the environment. This is the complete retrieval of ACCIONA Energía in the 'El Cabrito' wind farm, the oldest in Cadiz province.

The company will complete the start-up phase of the wind farm in the last week of 2018, fourteen months after having started removing the old wind turbines. The lattice tower turbines -with a capacity of 330 kW each and between 24 and 36 meters in height- have disappeared to give way to modern turbines of Nordex Acciona Windpower technology. Eight of them are the N100 / 3000 model, of 3 MW each and a hub height of 85 meters, while another oven (AW70 / 1500) will have a capacity of 1.5 MW and a hub height of 60 meters.

Advantages for the environment

The disassembly of the old wind farm involved removing the foundations, 31 transformers, unnecessary accesses, and the recovery of waste management and the recovery of the landscape.

The repowering wind energy project involved the adaptation of the access track, the construction of the wind farms, the construction of the foundations for the new wind turbines, the setting of the cables for the installation and the adaptation of the substitution and control building.
......
The new El Cabrito will generate on average 112 gigawatt hours (GWh) of clean energy per year, around 16% more than the old wind farm.
.......

https://www.evwind.es/2019/01/18/wind-e ... ated/65814

[izentrop]

French wind in deadlock for more than a year https://www.euractiv.fr/section/energie ... an-a-year/

The French government is struggling to decide who should issue wind farm licenses. Result: no new project can be created.

The number of licensed wind turbines collapsed. For Paris, which tries to present itself as a climate champion, the situation becomes embarrassing.

In December 2017, the Council of State, the highest French administrative court, repealed a decree giving regional prefects the responsibility to grant the environmental permits necessary for the construction of wind farms. Since then, no one can deliver them. ...

[Exnihiloest]

Germany has almost doubled its electricity fleet by installing 100GW of solar and wind power. But its CO2 emissions continue! In addition, it is now obliged to subsidize both solar and wind power, and only fossil fuels remain online when "renewables" produce almost nothing, which is frequent.
https://www.atlantico.fr/decryptage/356 ... ierre-riou
https://energy-charts.de/power_inst_de.htm

Wind energy is a waste, and if you believe in warming by the CO2, we can see, wind is certainly not the solution.

[izentrop]

A wind turbine breaks in 2 in the oise

[Ahmed]

She was too exposed to the wind ...

[Adrien (ex-nico239)]

Rather than these big bazaars would it not be possible to produce individual turnkey facilities for individuals.

Installations connected to individual meters and which would provide wind power to the house when possible and which would switch back to the traditional grid on days without wind.

[izentrop]

You have to go get the wind where it is ... in height and then the big blades make that it turns less quickly. Few birds can be surprised, while the former were true choppers.
See the January 20 publication on the replacement of old Spanish wind turbines. https://www.evwind.es/2019/01/18/wind-e ... ated/65814

[Ahmed]

With larger blades the rotation speed is certainly lower, but what about the linear speed at the end of the blades?