Loading ...
Sorry, an error occurred while loading the content.

Re: [MSM] former member returning

Expand Messages
  • John Gilmer
    ... Maybe. The first step is at least a back of the envelop survey to see just what your hydro potential is. You can get a half/ass idea of volume by tossing
    Message 1 of 8 , Jul 1 5:29 AM
    • 0 Attachment
      Blueduck Blog wrote:
      > The man who revived the pelton wheels up and sold out and moved to the
      > Philippines a while back to get married again at age 70 plus..... but
      > from what i talked to him about you need a decent fall and flow together
      > to produce any kind of decent power from a creek.

      The first step is at least a back of the envelop survey to see just what
      your hydro potential is.

      You can get a half/ass idea of volume by tossing a floating object
      into the center of the creek(s) and determining how long it takes to
      travel, say, 20 ft. The water tends to "stick" to the sides and bottom
      so a VERY conservative measure of the cross section area of the stream
      is taken. Dividing this by two (2) fudges down a bit more.

      That give you the cu/ft per second if you use consistent units (feet,
      seconds) V=0.5xAxS (where A is area, S is stream speed.) FT^2xFT/sec =
      CuFt/sec. Convert to gallons/second by multiplying by 8 (gud enuf).

      Then you need to determine your maximum but practical head or drop of
      the creek(s) over your property.

      At this point you exploit that some water pumps are 'reversible.' You
      go to a catalog of on on-line catalog and find a pump that would pump
      your volume of water against your head. It well recommend a certain
      motor size/speed.

      Now you are in the ball park. As an additional "fudge" you might
      want to take the motor size and divide by 2 again.

      Where do you stand?

      If you want more accurate results, you take the volume from above and
      convert it into mass (64 #/cu ft). You have so many pounds of water
      flowing down per second. Multiply that by the "head" in feet and you
      have foot pounds /second. 550 foot lbs/sec = 1 hp = 700 watts (note I
      am always rounding down!)

      Once you have done your math you have to decide whether the game is
      worth the candle. If you can count on it 24/7, even as little of 50
      watts available 24/7 will serve you better than peak solar of 300
      watts. The solar will not work at night (duh!) and will not be much
      good more than 6 hours/day. Clouds mess things up. The panels can be
      damaged and may be difficult to repair.

      Note that in the real world, power companies routinely walk away from
      small (20 kW or so) hydro plants. One reason might be the liability
      associated with the dam but that fact that their marginal cost of
      generating power from other sources can be a small as $.04 per kWh.
      It's difficult to justify 'management' of a source the produces less
      than $1/hour worth of power. Even if you use more optimistic numbers,
      power companies don't want to mess with "small hydro."

      Note that small hydro has other problems. One is that most streams
      flood occasionally. Trouble is that all your power equipment is right
      down there on the flood plain. If you decide you want some power
      storage (i.e.: batteries) your regulator and your cells will be right
      down there in the flood plain.
      > you are better off with solar in the long run, and if you are handy with
      > a welder and building skills a person could build up a unit that uses
      > the sun to heat water, and use thermal conductivity to transfer heat to
      > electric power.... similar to technology used in the space program.....
      > in any event you could build it big enough to use with a heat pump to
      > heat and cool your house and provide hot water for domestic use, and
      > even perhaps heat a green house. Then there is the use of a focused
      > mirror on a pipe to make steam to turn a turbine..... it is done on a
      > large scale in Utah and I see no reason that it could not be
      > accomplished on a small scale as well. and there are other over unity
      > devices that could work too, a person just has to have a vision and
      > build one....
      > William
      > Idaho
      > On 6/26/2009 4:33 PM, Randall wrote:
      >> .....
      >> Have got two creeks on the place that have never run dry. What do
      >> ya'll know about a water wheel to generate electricty? Will probably
      >> have to build some kind chute to drop the water....... Necessity may
      >> push me that way after all these years..What info do ya'll have for
      >> me..Cat
      >> .
      >> __,_._,_
      > ------------------------------------
      > ************************************************************************
      > Please check out our new Blog "Daily Survival"
      > http://daily-survival.blogspot.com/
      > ************************************************************************
      > Group Email Addresses
      > Post message: misc_survivalism_moderated@yahoogroups.com
      > Subscribe: misc_survivalism_moderated-subscribe@yahoogroups.com
      > List owner: misc_survivalism_moderated-owner@yahoogroups.com Yahoo! Groups Links
    Your message has been successfully submitted and would be delivered to recipients shortly.