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elevated weight as storage for generator? | 26 comments (26 topical, editorial)
Re: elevated weight as storage for generator? (3.00 / 0) (#22)
by Neo I on Mon Nov 14th, 2005 at 11:30:40 AM MST
(User Info)

What about compressed air?

I've been thinking of creating a micro-hydro undershoot wheel that runs a mechanical air pump that feeds into a tank.  I then use the air power to run a basement sump pump.

Typical Sump:
2 meter lift
average 400 liters per day
(800 liter/meters per day)

Typical Stream Flow: 1 liters/second (min=0 max=25 L/sec)
Stream Head Drop: 20 cm

  1. /20 liter/cm per second
  2. *(1/20) liter/cm per minute
  3. *60*(1/20) liter/cm per hour
  4. *60*60*(1/20) liter/cm per day
  5. *60*60*(1/100) liter/meters per day
  6. *0.001 liter/meters per day
  7. liter/meters per day
Make sense?


Re: elevated weight as storage for generator? (3.00 / 0) (#23)
by thunderhead (mail me from my homepage!) on Wed Nov 23rd, 2005 at 03:11:51 AM MST
(User Info) http://www.simon.richardson.net/mailme.htm

The problem with compressing air is that you'll lose a good percentage of your energy heating up the air.  When you compress cold air you end up with compressed hot air - which then cools down and wastes your energy.  When you expand it, you end up with expanded cold air - which heats up, and wastes your energy.

Could you figure out a way to get a shaft from the microhydro to the basement pump?  After all, the high rainfall that'll flood your basement is also the high rainfall that'll speed up your stream.


[ Parent ]



elevated weight as storage for generator? | 26 comments (26 topical, 0 editorial)

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