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Old 08-15-2021, 05:13 PM   #91 (permalink)
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I was bored so I went back and watch the video in Permalink #1 again. It's sad they don't teach Bucky Fuller in schools.

Quote:
Quote by R. Buckminster Fuller: "Wealth is a person's ...
https://www.goodreads.com/quotes/106...certain-number
"Wealth is a person's ability to survive a certain number of days forward." ― R. Buckminster Fuller tags: business , finance , money , wealth , wisdom
By the end I was wondering why there are't nuclear powered Pycrete submarine tugboats towing Templated supercavitating icebergs to the places that need fresh water.

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Old 08-16-2021, 02:14 AM   #92 (permalink)
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Quote:
Originally Posted by freebeard View Post
How many feet of run for 1ft of fall? Maybe their best bet would be an undershot wheel.
In my youth I tossed boulders into the concrete bridge/tunnel that the crick flowed through, backing it up slightly. Someone, probably with the county, eventually disbursed those boulders. That 1ft fall had no feet of run because it came from the tunnel/bridge. I timed how long it took to fill a 5 gallon bucket and then multiplied the width to guestimate the flow. Very imprecise but not off by an order of magnitude.

I figure my micro hydro dream property probably lies somewhere on the North Santiam river.
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Old 08-16-2021, 01:28 PM   #93 (permalink)
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Regarding the second half of the quote:
Quote:
Power Waterwheel
waterwheelfactory.com/power.html
Undershot wheels are normally narrow and have to have the channel walls very close to the sides of the wheel to maximize the flow of water to pass through the wheels to generate power. This type of wheel is generally the least efficient type of wheel - usually in the 30-50% range.
Quoth Wikipedia:
Quote:
Stream (also known as free surface). Ship wheels are a type of stream wheel.
  • Vertical wheel with horizontal axle
  • The bottom of the wheel is placed into flowing water
  • Driving surfaces blades flat prior to 18th century, curved thereafter
  • Water very large volume, no head
  • Efficiency about 20% prior to 18th century and later 50 to 60%

Undershot
  • Vertical wheel with horizontal axle
  • The water hits the wheel low down, typically in the bottom quarter
  • Driving surfaces blades flat prior to 18th century, curved thereafter
  • Water large volume, low head
  • Efficiency about 20% prior to 18th century and later 50 to 60%
Breastshot
  • Vertical wheel with horizontal axle
  • The water hits the wheel roughly central, typically between one quarter and three quarters of the height.
  • Driving surfaces buckets carefully shaped to ensure that the water enters smoothly
  • Water large volume, moderate head
  • Efficiency 50 to 60%
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Old 08-16-2021, 01:42 PM   #94 (permalink)
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These are paddles. What about buckets? Does anything improve?
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Old 08-16-2021, 01:47 PM   #95 (permalink)
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I'm no ex-spurt but buckets need little holes in the side to let air escape.
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Old 08-16-2021, 11:46 PM   #96 (permalink)
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I want high pressure and a pelton wheel.
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Last edited by redpoint5; 08-17-2021 at 12:04 AM..
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Old 08-16-2021, 11:56 PM   #97 (permalink)
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Should we take you at your word?
Quote:
Peloton - Wikipedia
https://en.wikipedia.org/wiki/Peloton
Peloton formations have been described as exhibiting two main phases of behavior: a compact, low-speed formation, and a single-file, high-speed formation. Peloton phases are indicated by thresholds in collective output that can be modeled mathematically and computationally.
Else:
Quote:
Pelton wheel
A Pelton wheel is an impulse-type water turbine invented by American inventor Lester Allan Pelton in the 1870s. The Pelton wheel extracts energy from the impulse of moving water, as opposed to water's dead weight like the traditional overshot water wheel.Wikipedia
No pressure.
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Old 08-17-2021, 12:05 AM   #98 (permalink)
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Quote:
Originally Posted by freebeard View Post
Should we take you at your word?


Else:


No pressure.
It's probably the 3rd time I used my phone to view the forum in the years here, and of course the experience included retarded word "correction".

99.9% of the time I'm on a computer with keyboard, because I like myself. All those errors are original.
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Old 08-17-2021, 12:11 AM   #99 (permalink)
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'Splains everything.
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Old 08-20-2021, 11:51 AM   #100 (permalink)
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buckets

Quote:
Originally Posted by Piotrsko View Post
These are paddles. What about buckets? Does anything improve?
The paddles would be on the order of Cd 1.11, while the bucket, Cd 1.35, leading to the Pelton wheel.
The bullet-valve nozzle, as used in hydro-electric dams, under variable-head conditions in the reservoir, optimize the water jet onto the Pelton Wheel for maximum generating efficiency.
You can probably glimpse them now at Hoover Dam, as it's been turned off for the first time in its history.

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