Wind power: for or against the wind?

[Did67]

Very curious, this case.

It is known that the cooling of the air is not uniform, following the radiation, at night ... We therefore use "giant" fans (well: big!) To stir the air within the framework of the fight against frost. By pushing in hotter air and mixing, we manage to "scrape" the two or three degrees which would be fatal.

https://www.leprogres.fr/economie/2016/ ... rer-le-gel

https://www.lesgrappes.com/magazine/le- ... es-vignons

But this process, except the energy injected in this case to brew (it is giant fans driven by motors), does not create energy. It mixes warmer air, present at altitude, with colder air, at ground level.

In the case of wind turbines, there is indeed the friction of the blades and probably the heating of the gears, which I suppose are well oiled however. So I don't see how wind turbines can "heat" the atmosphere globally. Aside from the brewing effects. That do not change the balance sheet.

On the other hand, the nuclear or thermal (coal) power plants which reject 40 at 60% of the initial fuel energy in the atmosphere, through the cooling circuits, they do not warm up ???

They all became stupid like Trump or what?

[A.D. 44]

Hello,

... nuclear or thermal (coal) plants that release 40 at 60% of the initial fuel energy in the atmosphere ...

And incidentally in streams ...

[A.D. 44]

... We therefore use "giant" fans (well: big!) To stir the air within the framework of the fight against frost.

Helicos too!

[Did67]

Exact.

The principle of conservation of energy tells us that apart from the fuels or electric currents used in these cases, no energy is lost, no energy is created in the system [in this case, the ground and the atmosphere above]

In the case of wind turbines, it is only the energy of friction - air on the blades, mechanical friction in the machines - and the Joule effect in alternators that can contribute to global warming. Even a Harvard freshman should know it. But he may have been a fan of Trump and neo-creationist, so he can not know everything either. Thermodynamics is a science that does not appear in the Bible, nor is it mastered by Trump (who brews dollars, not looks - he does so much though!).

[Did67]

And incidentally in streams ...

Yes too.

The "big" of the calories dissipated by our nuclear power stations however leave in the air in the form of evaporated water. It is therefore dissipated in the form of vapor.

[izentrop]

Beside fossil energies the impact is cat pee indeed. The study takes into account wind energy as a replacement for fossil fuels, which is already a utopia and it remains a hypothetical calculation.

It is not that I want to defend the thing, but the wind turbines brew the air on average at 70 m soil, the impact must be different from a forest for example.

At the rate where the current fossil farms go, one wonders what the ENRs have in the stomach too.

[Christophe]

Yes izentrop, do not worry: the USA will never know the (so called) rise of 0.24 ° C since they will never be fed 100% wind power ...

Thermodynamically, the air brewed by the wind turbines can actually be warmer LOCALLY but:

a) in no case does the energy received by the ground increase (since it is IR radiation !!) ... unlike the greenhouse effect which REALLY increases this energy!

b) The winds are so much more powerful than the brewing wind turbines that I still have trouble conceiving how this study could exist. Strange therefore as a study yes, must believe that the lobbies have now (also) infiltrated universities as prestigious as Harvard ... or so that's what you said Didier: they line up at the level of Trump ...

[Janic]

Thermodynamics is a science that does not appear in the Bible

not in the form attributed to him today, only!

[moinsdewatt]

Yet not in an unhealthy neighborhood of Marseille:

A wind turbine collapsed in the Pithiverais

the 06 / 11 / 2018



A wind turbine collapsed in the night from Monday to Tuesday, between Guigneville and Charmont-en-Beauce, north of Pithiviers.


A monster of 90 meters, pale not included, and 50 tonnes of steel fallen to the ground. A striking image that has been on display since Tuesday morning, between Guigneville and Charmont-en-Beauce, this Tuesday in the Pithiverais.

They are residents of one of the hamlets of Guigneville, located a few hundred meters that gave the alert to 6 hours on Tuesday morning when they found that one of the 16 wind turbines operated by the company EDP Renewables on the area, in the park of Mardelle, had collapsed. The turbine, the sixth in a line of ten along RD 22, collapsed at dawn.



The fall of the craft did not injure or damage other aircraft. A safety distance of 500 meters is required between each wind turbine.

The causes of this collapse are not known for the moment. No particular meteorological episode seems to be in question: Météo France had not forecast and did not detect any particularly violent wind in the night from Monday to Tuesday.

EDP ​​Renewables teams are on hand for their investments. "The important thing was first to secure the area, which is done. We must now investigate to find out what happened and make sure it is not a common reason for manufacturing, which could affect other wind turbines. " No track is privileged. "Checks are done very regularly. But zero risk does not exist, "points out Patrick SImon.

The fifteen other wind turbines in the Parc du Vieux-Moulin were immediately shut down pending the results of the investigation. EDP ​​"will communicate more information about this event as soon as it is available"

https://www.larep.fr/guigneville/faits- ... 43015.html

[Adrien (ex-nico239)]

Reaching of cost therefore of breakeven point in prospect ???

Or simple technical failure isolated ???

To be continued