The Black File of Green Energies with Science and Life

Renewable energies except solar electric or thermal (seeforums dedicated below): wind turbines, energy from the sea, hydraulic and hydroelectricity, biomass, biogas, deep geothermal energy ...
marcel
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by marcel » 22/03/08, 18:45

Chatham wrote:The space taken by the wind turbines is inconstructible, which limits the exploitation of the ground to agriculture ... but given their exposed position and in height, these grounds are most often unusable (and unexploited as in the USA ... ), moreover for their maintenance, there must be an access path for each which also blocks the ground ... we are far from a right of way limited to the base ...

Well, if it's a desert, the footprint is even less of a problem. I'm not even talking about offshore. Then all the wind farms do not resemble those of the Californian mountains. I thank you for the paths. Small rabbits have the right to run between wind turbines ... we don't have to think of every space on the planet as an economically exploitable area. Sometimes, I walk around, idle, quiet ... if, if ... I surely have extraterrestrial origins to think that we can leave vacant space on our good old planet.
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by Chatham » 23/03/08, 09:45

We were talking about wind turbines in France, not in the deserts and in France the available surfaces are meager especially as our population density is "slightly" higher than that of the USA ...
In terms of economically exploiting each plot of land, in case you are not aware, many countries are no longer self-sufficient for food and especially in Africa wilderness areas are on the way to disappear, overcrowding and galloping demography is the cause ...
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marcel
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by marcel » 23/03/08, 11:31

That's exactly what I think chatam, the problem is not in energy production but on the demand side in a world where we only think of increasing the population, which is the nature of each living species, but for humans, in addition, it is a good way to feed the growing goddess.
We spend our time lamenting all the causes of death while the population keeps growing, there is a paradox.
But Christophe is right, in the long term, when we have exhausted the fossil reserves, renewable energies will cover 100% of consumption (needs will only be met up to production). The problem is to know in which world our children will be then, a world where the population will be satisfied with the supply, a world of energy war, a world always overcrowded, a world where famine and disease will drastically restrict the number of inhabitants ... ??????
Scenario difficult to see.

Another problem with wind power is that it is only considered in the context of (current) economic-energy competitivity where only large wind turbines find (and still have) their place. But in a world where supply is scarce, what will happen to the energy of the wind? My region (Provence) was teeming with mills in the past. Will they come back in one form or another later? Will we be able to store energy at home? In which case the small wind turbine would become part of the energy puzzle.
What I criticize the scenarios that journalists do is not to consider that our way of approaching the problems will necessarily change in a society abandoned by the fairy fossil energy.
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by Ahmed » 23/03/08, 19:29

The major question is, how to find a substitutable solution for current energy production. Wouldn't it be more relevant and simpler to ask the question differently and no longer wonder how to but Why?
Are you sure there is a correlation between energy consumption and "standard of living"? I am talking about standard of living and not level of consumption, two concepts usually confused.
Even if there is no perfect society from which we could draw inspiration to the letter, there are examples of communities with almost zero energy consumption and which are not yet plunged in bottomless affliction. Of course, in this case, some growth would be desirable, as long as it meets certain criteria and would make it possible to overcome certain humanly intolerable constraints.
Given the huge difference between these companies and ours, I think we have considerable room to maneuver to define our own vision of our future (provided that we are precisely aware of what we want it to be!).
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by Christophe » 23/06/08, 13:22

Nikkozzblu's response posted online (too bad it only happened once)

Summary: https://www.econologie.com/dossier-noir- ... -3842.html
Download complete:
https://www.econologie.com/enr-droit-de- ... -3843.html

I also added some extracts in the first pages which give the "tone" of the article.
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by Obamot » 26/04/10, 13:54

And we are talking about this issue of "Renewable energies":

According to the study below, 100% renewable energy in 2050 would be possible!
This is enough to revive this old debate!

EREC study ...>
Full report ...>
Source ...>

Here is the diagram which was at the heart of the reflection and which summarizes on its own, the main points of the pragmatic questions:

Image

It is clear that "feasibility" alone is not enough!

The whole question is whether, politically, the pressure will be strong enough to make things happen.

As thermal solar is at the very heart of renewable energies, I also feel that ...
... we're going to talk about the TREC (Trans-Mediterranean Renewable Energy Cooperation) ...>
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by zorglub » 26/04/10, 16:48

I have the S&V article I have to take it out to read it again .....
and see the evolution of the facts compared to the writings
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by sen-no-sen » 26/04/10, 17:02

the article is 2 years old, but all the same, the information is completely false, they envision the future based on the current era, what a lack of vision!
In 2050 (and maybe some of this forum will still be there, I hope, to testify) our way of life will certainly have changed radically (for good or for bad ???).

It is perfectly possible to supply 100% of our needs with renewable energies, there is no doubt about it.
And that without going back to the age of the caves!

ps: we had come together in 40 years, same day, same hours ...
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by Rical » 24/10/12, 01:17

How to make wind turbines quieter?
* At the Tawny Owl http://fr.wikipedia.org/wiki/Chouette_hulotte like "in most owls, the flight is silenced by its silky feathers and by a border of fine barbs placed on the leading edge of the outermost primary flight feathers. "
* For the bottlenose dolphin http://fr.wikipedia.org/wiki/Grand_dauphin "The dolphin skin absorbs water turbulence, thanks to an alveolar structure and micro-deformations of its surface"
* Have these techniques been tried on wind turbines? To reduce noise? To improve efficiency?
Otherwise, where to offer them?
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by dedeleco » 24/10/12, 01:49

It's a very good complex idea, and you have to add bats to the very silent flight !!!

But there are senses, nerves and muscles on each skin portion to stifle the noisy swirls and this is very difficult to copy and reproduce on blades to make them flexible and ordered in shape !!!
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