Question. Is extracting wind power causing some climate change problems?

[Mountainmike]

From efficiency Wind farms take ( say) 40- 50 % of the available power.

A plausibility argument:
Wind is part of what is cooling land.
So with less wind , the land WILL be hotter.
That heat is part of the climate change problem.

so is wind power extraction - at best unreliable - causing greater temperature swings?

Ive looked for impact statements or science , I’ve not found much.

 

[trophy33]

What do you mean by "less wind"?

 

[Halbhh]

while I saw a theory that climate change could reduce wind speed, it seems we ought to be skeptical and look to data, and the first thing I found was a report from 2019:

The World's Winds Are Speeding Up

The trend contradicts concerns of a “global stilling,” with implications for wind energy

www.scientificamerican.com

But it's good to continue to look further, at more over time. I have to leave at the moment for some duties, but thought I'd show you that one at least first

 

[timothyu]

The question might be why aren't electric vehicles using mounted wind turbines to charge batteries while on the move.

 

[essentialsaltes]

A plausibility argument:
Wind is part of what is cooling land.

It's hard to know where to start.

When we talk about temperature anomalies, we're usually talking about air temperatures. Or maybe ocean temperatures. Not land temperatures.

More to the point, though... If, for instance, wind over a wet rock cooled it by evaporation, the heat does not disappear. Some of it moves from the rock to the air.

The oceans, the atmosphere, the solid earth... they are all touching each other. Making one bit cooler and one bit warmer doesn't make any difference.

To get heat off the planet, energy has to be beamed out into space. This is precisely what the greenhouse effect prevents, trapping additional heat within the planet.

 

[Bradskii]

From efficiency Wind farms take ( say) 40- 50 % of the available power.

A plausibility argument:
Wind is part of what is cooling land.
So with less wind , the land WILL be hotter.
That heat is part of the climate change problem.

so is wind power extraction - at best unreliable - causing greater temperature swings?

Ive looked for impact statements or science , I’ve not found much.

I think you're on to something, Mike. Maybe we should power those fans to blow air. That'll cool everything down and we'll solve the problem. Why did no-one think of this before!

 

[sjastro]

I think you're on to something, Mike. Maybe we should power those fans to blow air. That'll cool everything down and we'll solve the problem. Why did no-one think of this before!

This guy has a better idea for reducing vehicle emissions......

​

Mr. Newton would have a thing or two say about this but note how the umbrella is flapping inwards instead of outwards.

 

[timothyu]

but note how the umbrella is flapping inwards instead of outwards.

They must have reversed the vid. lol Actually it is the dead zone. But be assured, the operator is not emission free.

 

[Bradskii]

​

Mr. Newton would have a thing or two say about this but note how the umbrella is flapping inwards instead of outwards.

Negative pressure in front of the umbrella I think causing some luffing. But he's using all that wind when it could be cooling the planet!

 

[timothyu]

But he's using all that wind when it could be cooling the planet!

Good point

 

[sjastro]

Negative pressure in front of the umbrella I think causing some luffing. But he's using all that wind when it could be cooling the planet!

Ah but if we were to believe the video there should be a positive pressure on the inside of the umbrella since air from the fan or blower is directed onto this surface.
Of course Newton's third law "blows" this method of propulsion apart so the question is how the video was produced.
A backpack leaf blower to provide thrust (Newton's third law here), a windy day, a downhill run which was edited or running the video backwards?

 

[Hans Blaster]

The question might be why aren't electric vehicles using mounted wind turbines to charge batteries while on the move.

 

[Bradskii]

Ah but if we were to believe the video there should be a positive pressure on the inside of the umbrella since air from the fan or blower is directed onto this surface.
Of course Newton's third law "blows" this method of propulsion apart so the question is how the video was produced.
A backpack leaf blower to provide thrust (Newton's third law here), a windy day, a downhill run which was edited or running the video backwards?

Ah, my bad. I just glanced at the video. I thought he was wearing a backpack. I thought it was wind propelled. So yeah, Mr. Newton should have some input here. Equal and opposite forces...should mean he goes nowhere. I think it might be wind propelled and the wind is not directly behind him, causing the luffing on the umbrella, same as you get on a sail. The leaf blower is for show.

 

[Hans Blaster]

Ah but if we were to believe the video there should be a positive pressure on the inside of the umbrella since air from the fan or blower is directed onto this surface.
Of course Newton's third law "blows" this method of propulsion apart so the question is how the video was produced.
A backpack leaf blower to provide thrust (Newton's third law here), a windy day, a downhill run which was edited or running the video backwards?

~~No one ever skateboarded *down* hill~~ That's unpossible.

 

[Neutral Observer]

Then again, sometimes even physics professors get stuff wrong.

 

[eleos1954]

From efficiency Wind farms take ( say) 40- 50 % of the available power.

A plausibility argument:
Wind is part of what is cooling land.
So with less wind , the land WILL be hotter.
That heat is part of the climate change problem.

so is wind power extraction - at best unreliable - causing greater temperature swings?

Ive looked for impact statements or science , I’ve not found much.

wind power extraction is that .... extracted from already occurring winds .... they don't create wind they use it.

 

[sjastro]

Then again, sometimes even physics professors get stuff wrong.

What's the point you making here?
If you are suggesting the video indicates it's possible to construct a vehicle powered by a fan and a sail, you're not comparing apples with apples.

In your video the fan is a rotating propellor blade which pushes the air backwards and is opposite to the direction of motion.
This results in a pressure differential, higher pressure behind the blades lower pressure in front, and results in a thrust force in the forward direction.
The fan and sail design shown in my video is where the airflow from the fan is in the same direction as motion.
This will not work as the reaction force on the sail is equal and opposite in direction to the force exerted on the sail by the air.

 

[Mountainmike]

The question might be why aren't electric vehicles using mounted wind turbines to charge batteries while on the move.

I will take the sensible part of your post,
i agree with the idea car batteries should be charged local to windmills, so vehicle charging is swap of battery not massive grid usage with all the copper loss
as for the facetious aspect, is it really impossible to have a science discussion here?

 

[Mountainmike]

wind power extraction is that .... extracted from already occurring winds .... they don't create wind they use it.

You are all missing the point. Is it deliberate?
my point is whether wind extraction is causing greater land temperatures? Ie disturbing climate balance?
literalky a green house effect. A green house is in essence a window free enclosure .

 

[timothyu]

What is being extracted?