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ISayMoo
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Re: Tilting at windmills

December 28th, 2019, 10:24 pm

‘People of Earth, your attention please,’ a voice said, and it was wonderful. Wonderful perfect quadraphonic sound with distortion levels
so low as to make a brave man weep.

‘This is Prostetnic Vogon Jeltz of the Galactic Hyperspace Planning Council,’ the voice continued. ‘As you will no doubt be aware, the
plans for development of the outlying regions of the Galaxy require the building of a hyperspatial express route through your star system, and
regrettably your planet is one of those scheduled for demolition. The process will take slightly less than two of your Earth minutes. Thank you.’

The PA died away.
Uncomprehending terror settled on the watching people of Earth. The terror moved slowly through the gathered crowds as if they were iron filing on
a sheet of board and a magnet was moving beneath them. Panic sprouted again, desperate fleeing panic, but there was nowhere to flee to.

Observing this, the Vogons turned on their PA again. It said:
‘There’s no point acting all surprised about it. All the planning charts and demolition orders have been on display in your local planning
department in Alpha Centauri for fifty of your Earth years, so you’ve had plenty of time to lodge any formal complaint and it’s far too late to start
making a fuss about it now.’

The PA fell silent again and its echo drifted off across the land. The huge ship turned slowly in the sky with easy power. On the underside of each a
hatchway opened, an empty black square.

By this time somebody somewhere must have manned a radio transmitter, located a wavelength and broadcast a message back to the Vogon ships,
to plead on behalf of the planet. Nobody ever heard what they said, they only heard the reply. The PA slammed back into life again. The voice was
annoyed. It said:

‘What do you mean you’ve never been to Alpha Centauri? For heaven’s sake mankind, it’s only four light years away you know. I’m sorry, but if
you can’t be bothered to take an interest in local affairs that’s your own lookout.

‘Energize the demolition beams.’
Light poured out of the hatchways.
‘I don’t know’ said the voice on the PA, ‘apathetic bloody planet, I’ve no sympathy at all.’ It cut off.
There was a terrible ghastly silence.
There was a terrible ghastly noise.
There was a terrible ghastly silence.

The Vogon Constructor Fleet coasted away into the inky starry void.”

– Douglas Adams The Hitch-Hikers Guide to the Galaxy
 
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katastrofa
Posts: 9921
Joined: August 16th, 2007, 5:36 am
Location: Alpha Centauri

Re: Tilting at windmills

December 28th, 2019, 10:34 pm

The problem is that they build the windmills on birds' flyways. Not only the birds get killed by the blades, but also they have to adjust their migratory routes for the new obstacles, which lowers their already dramatic chances of surviving the journey.
 
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ISayMoo
Posts: 2368
Joined: September 30th, 2015, 8:30 pm

Re: Tilting at windmills

December 29th, 2019, 12:53 am

https://besjournals.onlinelibrary.wiley.com/doi/abs/10.1111/1365-2656.12961

"
  1. Wind energy production has expanded to meet climate change mitigation goals, but negative impacts of wind turbines have been reported on wildlife. Soaring birds are among the most affected groups with alarming fatality rates by collision with wind turbines and an escalating occupation of their migratory corridors. These birds have been described as changing their flight trajectories to avoid wind turbines, but this behaviour may lead to functional habitat loss, as suitable soaring areas in the proximity of wind turbines will likely be underused.
  2. We modelled the displacement effect of wind turbines on black kites (Milvus migrans) tracked by GPS. We also evaluated the impact of this effect at the scale of the landscape by estimating how much suitable soaring area was lost to wind turbines.
  3. We used state‐of‐the‐art tracking devices to monitor the movements of 130 black kites in an area populated by wind turbines, at the migratory bottleneck of the Strait of Gibraltar. Landscape use by birds was mapped from GPS data using dynamic Brownian bridge movement models, and generalized additive mixed modelling was used to estimate the effect of wind turbine proximity on bird use while accounting for orographic and thermal uplift availability.
  4. We found that areas up to approximately 674 m away from the turbines were less used than expected given their uplift potential. Within that distance threshold, bird use decreased with the proximity to wind turbines. We estimated that the footprint of wind turbines affected 3%–14% of the areas suitable for soaring in our study area.
  5. We present evidence that the impacts of wind energy industry on soaring birds are greater than previously acknowledged. In addition to the commonly reported fatalities, the avoidance of turbines by soaring birds causes habitat losses in their movement corridors. Authorities should recognize this further impact of wind energy production and establish new regulations that protect soaring habitat. We also showed that soaring habitat for birds can be modelled at a fine scale using publicly available data. Such an approach can be used to plan low‐impact placement of turbines in new wind energy developments."
 
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katastrofa
Posts: 9921
Joined: August 16th, 2007, 5:36 am
Location: Alpha Centauri

Re: Tilting at windmills

December 29th, 2019, 1:01 am

Spain has many wind farms, and some of them are sometimes turned off during bird migration periods. They could install cameras and train a program to stop the farm when the flock is passing (if stupid pizza companies can do image recognition to spot mistaken orders why can't ML help birds?). There were studies which show that the loss to the wind farm efficiency is miniscule and the bird deaths are reduced by a high percent (and those are just the deaths caused directly by the wind mills). I will find the research articles when I'm finished studying the great unknown that I'm studying atm.
 
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Cuchulainn
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Re: Tilting at windmills

December 29th, 2019, 4:40 pm

Anyone know about small scale (domestic) wind turbines; can they do more than just boil an egg? I suppose they would be good on the edge of a mountain, where the wind comes sweeping down the plain.with no upwind obstacles?
Better than solar panels when wind >> sun.

Image
 
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Alan
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Re: Tilting at windmills

December 30th, 2019, 7:14 pm

Here's a guy
 
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Cuchulainn
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Re: Tilting at windmills

December 30th, 2019, 9:06 pm

Here's a guy
Good find. Seems there's a lot out there. I don't have river in my garden but an unlimited supply of water.. hydro coupled to wind. Pump water uphill at night?

Micro n-blade turbines, n = 3,5.7,9,11 rpm vs torque? Time to review boundary layer theory.

www.youtube.com/watch?v=opP13e-TvHM

" 3 blades good, 4 blades bad."
 
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tw
Posts: 1176
Joined: May 10th, 2002, 3:30 pm

Re: Tilting at windmills

December 31st, 2019, 9:10 am

Here's a guy
Good find. Seems there's a lot out there. I don't have river in my garden but an unlimited supply of water.. hydro coupled to wind. Pump water uphill at night?

Micro n-blade turbines, n = 3,5.7,9,11 rpm vs torque? Time to review boundary layer theory.

www.youtube.com/watch?v=opP13e-TvHM

" 3 blades good, 4 blades bad."
One aspect that would might want to consider is the requirements to be able to sell power back to the grid and achieve the feed-in-tarriff.
Don't know about in your proposed location (NLD?) but for domestic sized production there can be annoying barriers.
Storage (e.g. Powerwall) is expensive.
 
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Cuchulainn
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Joined: July 16th, 2004, 7:38 am
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Re: Tilting at windmills

December 31st, 2019, 12:50 pm

Here's a guy
Good find. Seems there's a lot out there. I don't have river in my garden but an unlimited supply of water.. hydro coupled to wind. Pump water uphill at night?

Micro n-blade turbines, n = 3,5.7,9,11 rpm vs torque? Time to review boundary layer theory.

www.youtube.com/watch?v=opP13e-TvHM

" 3 blades good, 4 blades bad."
One aspect that would might want to consider is the requirements to be able to sell power back to the grid and achieve the feed-in-tarriff.
Don't know about in your proposed location (NLD?) but for domestic sized production there can be annoying barriers.
Storage (e.g. Powerwall) is expensive.
Actually, in this case i'm referring to my cottage in hiils on east coast of IRL. I think I would have a snowball's chance in hell of getting a wind turbine on my roof in NL. There is a special commitee that decides on this and related matters.

I am just wondering why all the hullabaloo about solar panels and none about turbines, especially along the western seaboard of Ireland. 
 
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tw
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Joined: May 10th, 2002, 3:30 pm

Re: Tilting at windmills

January 1st, 2020, 5:21 pm

Amazing blade

(but pretty amazing driving skills!)
 
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Cuchulainn
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Re: Tilting at windmills

January 1st, 2020, 10:20 pm

Amazing blade

(but pretty amazing driving skills!)
We need a bigger garden.
 
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Cuchulainn
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Re: Tilting at windmills

January 2nd, 2020, 2:49 pm

Historic 400 year-old mill. Yet another reason to ban fireworks.
Mayhem..

www.youtube.com/watch?v=g8q3I6L43wk
 
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tw
Posts: 1176
Joined: May 10th, 2002, 3:30 pm

Re: Tilting at windmills

January 2nd, 2020, 4:22 pm

Historic 400 year-old mill. Yet another reason to ban fireworks.
Mayhem..

www.youtube.com/watch?v=g8q3I6L43wk
5 orangutans, a silverback gorilla, a chimp and several monkeys from Krefeld zoo might have agreed with that sentiment.
 
 
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Alan
Posts: 10538
Joined: December 19th, 2001, 4:01 am
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Re: Tilting at windmills

January 2nd, 2020, 6:58 pm

Amazing blade

(but pretty amazing driving skills!)
Wow! They really lucked out on the fence height. I wonder if, after delivery, the truck had to back out.
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