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Windmill Economics 101...

 
 
Reply Thu 12 Apr, 2018 02:01 am
https://scontent-dfw5-1.xx.fbcdn.net/v/t1.0-9/30414802_1679860675394861_9089604468672036864_n.jpg?_nc_cat=0&_nc_eui2=v1%3AAeGNPrDVXq07Nk3UMYfRMn_ZOGD2ItiOBieluaLB5LOHhOJ9I6-U3kG1MOeweBJZRVVr1IR7_NFjxfgMINoJOkNcTfRtUZU9OBatq75M5X-AkQ&oh=11bcbaaa162378d5a31c650127062357&oe=5B633768
 
hightor
 
  4  
Reply Thu 12 Apr, 2018 02:52 am
I guess the propagandists didn't want anyone to see the whole paragraph::
Thomas Homer-Dixon wrote:
The concept of net energy must be applied to renewable sources of energy, such as windmills and photovoltaics. A two-megawatt windmill contains 260 tonnes of steel requiring 170 tonnes of coking coal and 300 tonnes of iron ore, all mined, transported and produced by hydrocarbons. The question is: how long must a windmill generate energy before it creates more energy than it took to build it? At a good wind site, the energy payback day could be in three years or less; in a poor location, energy payback may be never. That is, a windmill could spin until it falls apart and never generate as much energy as was invested in building it.

Clearly, the concept of net energy is crucial if we want to find a policy that will see us through the Energy Sustainability Dilemma.”
0 Replies
 
gungasnake
 
  -1  
Reply Thu 12 Apr, 2018 03:51 am
One minor problem, people generally don't live in places where the fricking wind blows at 50 mph all the time.....

https://images.duckduckgo.com/iu/?u=https%3A%2F%2Fs-media-cache-ak0.pinimg.com%2F736x%2F3a%2F11%2F68%2F3a116884945f870924f1ffd3f36fc015.jpg&f=1
gungasnake
 
  0  
Reply Thu 12 Apr, 2018 03:53 am
I mean, I occasionally drive past all those hideous windmills in North Texas, mile after mile after mile of the stinking things and God help any bird that ever has to fly through all of that, and it's hard to believe that one thorium reactor wouldn't produce more electricity than all of them.
hightor
 
  2  
Reply Thu 12 Apr, 2018 04:31 am
@gungasnake,
Those are wind turbines.

This is a windmill:
https://proxy.duckduckgo.com/iur/?f=1&image_host=http%3A%2F%2Fflexitreks.com%2Fwp-content%2Fuploads%2F2013%2F11%2FWindmill-Tulips-Holland-I.jpg&u=https://flexitreks.com/wp-content/uploads/2013/11/Windmill-Tulips-Holland-I.jpg
hightor
 
  2  
Reply Thu 12 Apr, 2018 04:34 am
@gungasnake,
Quote:
One minor problem, people generally don't live in places where the fricking wind blows at 50 mph all the time.....

That's why they have distribution systems. People don't need to live next to a wind turbine to obtain electric power from it.
https://proxy.duckduckgo.com/iur/?f=1&image_host=https%3A%2F%2Fs-media-cache-ak0.pinimg.com%2F736x%2F3a%2F11%2F68%2F3a116884945f870924f1ffd3f36fc015.jpg&u=https://i.pinimg.com/736x/3a/11/68/3a116884945f870924f1ffd3f36fc015.jpg
0 Replies
 
gungasnake
 
  0  
Reply Thu 12 Apr, 2018 06:48 am
A thorium reactor or one of these new fusion devices which Lockheed/Martin has just now received patents for could be put right where it was needed. It wouldn't need distribution systems, it would be vastly more efficient than any sort of a windmill or "wind-turbine(TM)" and you wouldn't need fifty miles worth of them to kill all the hawks and eagles in the territory.
0 Replies
 
gungasnake
 
  -1  
Reply Thu 12 Apr, 2018 06:50 am
https://images.duckduckgo.com/iu/?u=http%3A%2F%2Fozreport.com%2Fimages%2FHomerSimpson%2FHomerSimpson-Doh1.gif&f=1
0 Replies
 
Walter Hinteler
 
  2  
Reply Thu 12 Apr, 2018 09:43 am
@hightor,
In earlier centuries, grain and oil windmills were needed to meet the basic food requirements throughout the Münsterland region, where my ancestors had a farm since 1287.

https://i.imgur.com/VHvJrYBl.jpg

So, im the 18th century, they decided (but mainly due to inheritance problems) to sell the farm and built a windmill. After some successful business, they moved to the next larger town and built a new windmill, opened a trade in grain as well ... in the town centre (about 3,000 inhabitants in those days).
From about 1900, the windmill was only used as an auxiliary mill.

Wind turbines were first installed here in 1970's; since the 1980's we've got wind farms.

https://i.imgur.com/8VyS9NVl.jpg
0 Replies
 
oralloy
 
  -1  
Reply Thu 12 Apr, 2018 11:25 pm
@gungasnake,
gungasnake wrote:
I mean, I occasionally drive past all those hideous windmills in North Texas, mile after mile after mile of the stinking things and God help any bird that ever has to fly through all of that,

I saw a lot of windmills in Minnesota when I went out west for the eclipse.

Although what really struck me was the speed limit change between Minnesota and South Dakota. Wow.

Minnesota the speed limit was 70, and everybody went 75.

South Dakota the speed limit was 80, and most people went 90, with a handful weaving in and out of traffic at 100.

Crossing the state line felt like jumping to light speed in the Millennium Falcon.

But anyway, Minnesota has a lot of windmills.
Setanta
 
  3  
Reply Thu 12 Apr, 2018 11:43 pm
Gunga is apparently unaware that the winds are more constant and blow at higher speeds, the higher above the ground. This principle was understood by and essentially to the efficient use of sailing vessels in the days before steam power and diesel engines. The builders of cathedrals in Europe understood the principle, too. The upper walls were built so that they leaned outward to compensate for the more constant and forceful winds. Flying buttresses were used to assure that the walls did not collapse outward on those rare occasions when the constant winds lessened.
0 Replies
 
Walter Hinteler
 
  1  
Reply Fri 13 Apr, 2018 12:18 am
@oralloy,
People actually knew since ages how to use the wind, and where it was best to construct windmills.

Prenzlauer Berg ("Prenzlau Mountain") is nowadays a portion of the Pankow district in northeast Berlin.
In the 17th century, it was a Prussian royal estate, more or less just used for farming. And windmills.

https://i.imgur.com/D75O8kfm.jpg
(view of 1780)

When this part of Berlin became more urbinised, two windmills were converted into ... breweries
https://i.imgur.com/hR9bTblm.jpg
(view 1880)

Today, they've got a wind turbine just some hundret meters away from where the wind mills had been.
https://i.imgur.com/GfDxEddm.jpg
farmerman
 
  3  
Reply Fri 13 Apr, 2018 03:37 am
@Walter Hinteler,
The National Renewable Energy Lab (NREL) producs wind energy maps of the US at elevations of 30, 80. 100 m. The wind resource at these elevations helps the design of wind turbines. Usually a pre design study of wind is required for public projects. Around us e have some ridge tops in NE Pa that are being developed for turbines at 100m ellevations.
Also, theres big development of turbines off shore at 120m. The turbines have become pretty good fishing sites too.

0 Replies
 
gungasnake
 
  -1  
Reply Sun 29 Apr, 2018 07:56 am
https://scontent-dfw5-1.xx.fbcdn.net/v/t1.0-9/31195664_1891540597523615_6210308004600872960_n.jpg?_nc_cat=0&oh=772147e72c84718979caf8e7976db401&oe=5B52D1AB
Walter Hinteler
 
  2  
Reply Sun 29 Apr, 2018 08:25 am
@gungasnake,
De Noord ("The North") in Schiedam, Netherlands was the tallest windmill in the world ...

https://i.imgur.com/EDB3Qw2l.jpg

... until, close to it, the De Nolet was built in 2006, a wind turbine which resembles a traditional Schiedam windmill.

https://i.imgur.com/MULAO2Dl.jpg

As said: the tallest windmill in world is actually a disguise because hidden inside of the windmill’s 43-meter-tall tower is a wind power station. Operated by the >Nolet Distillery<, Noletmolen in Schiedam, South Holland, measures 55 meters at the top of the rotor, making it the tallest in the world.

But since this isn't a real windmill because of the way the structure is being used, the tallest still is De Noord with a roof height of 33.3 meters.

Interesting website about De Nolet wind turbine, with a lot of details about how the stones were produced.
0 Replies
 
edgarblythe
 
  1  
Reply Sun 29 Apr, 2018 09:50 am
Reason I prefer solar:

According to the current literature somewhere between 140,000 and 328,000 birds die each year from collisions with wind turbines. That's not all, explains the blog Natural Reactions: In addition, it appears that there is a greater risk of fatal collisions with taller turbines.
Walter Hinteler
 
  1  
Reply Sun 29 Apr, 2018 10:04 am
@edgarblythe,
There are about 1.050 windmills in the Netherlands, most operated by (voluntary) millers.
Hundreds disappeared in the early part of the 20th century - more than 9,000 had been there in the second part of the 19th century.
Walter Hinteler
 
  1  
Reply Mon 21 May, 2018 02:50 am
@Walter Hinteler,
Today, Pentecost Monday, is traditionally here in Germany "Mill Day".
You can visit about 1.200 still working mills, among them about 350 wind mills,
0 Replies
 
oralloy
 
  -1  
Reply Mon 21 May, 2018 11:43 am
@edgarblythe,
edgarblythe wrote:
Reason I prefer solar:
According to the current literature somewhere between 140,000 and 328,000 birds die each year from collisions with wind turbines. That's not all, explains the blog Natural Reactions: In addition, it appears that there is a greater risk of fatal collisions with taller turbines.
What about all the toxic chemicals produced by the manufacture of solar panels?
farmerman
 
  2  
Reply Mon 21 May, 2018 11:47 am
@oralloy,
the chinese get it all. We send em trash n glass, they dig up the silica and coatings and we just buy the solar panels.Isnt that what our president wants?
What do you think they make turbine nacelles outta, Fuggles?
 

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