[RE-wrenches] Well siphon?

[Bradley Bassett]

Years ago, and maybe still there, a siphon was used to go over the existing
dam on the Pocono reservoir to run a hydro generator. There was a vacuum
pump pulling a vacuum at the top of the arch to keep it full of water in
case air bubbles got in. They did have to prime it to get it going. I think
there are other similar smallish hydro power systems. Darryl is right about
how high you can go though.

Brad

On Thu, Jan 27, 2022 at 2:29 PM Darryl Thayer <darylsolar1 at gmail.com> wrote:

> Yes, but if the rise is greater than about 30 feet (25 feet even) the
> water head is greater than atmospheric and the water will draw a vacuum in
> the pipe.  These numbers depend upon the location (elevation) and
> temperature of the water.
> for example at 15,000 feet the atmosphere is about 1/2 or sea level,
> meaning the water column will break at 15 feet of head.  (from my high
> school physics, this is the scale height) so that at 7500 feet the water
> column is a maximum of 3/4 x 30 feet or 22 feet.  this is from memory and
> mine is not so good.
>
> On Thu, Jan 27, 2022 at 3:51 PM William Miller <william at millersolar.com>
> wrote:
>
>> Colleagues:
>>
>>
>>
>> All of our water pumping customers to date have been pumping water to
>> tanks higher in elevation than the well-head.  Just now I am looking at a
>> system pumping to a pond that is lower than the well-head and lower even
>> than the bottom of the well.  The 300’ well has the head at 1200’ elevation
>> and pumping to a pond at 800’ elevation.  The line goes over a 1500’
>> ridge.  If there were nothing impeding the water flow, would it not siphon
>> to the pond?
>>
>>
>>
>> Has anyone seen the basic physics available being used to advantage?
>>
>>
>>
>> Thanks in advance.
>>
>>
>>
>> William
>>
>>
>>
>> Miller Solar
>>
>> 17395 Oak Road, Atascadero, CA 93422
>>
>> 805-438-5600
>>
>> www.millersolar.com
>>
>> CA Lic. 773985
>>
>>
>>
>>
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