Hi Bill Sorry about the egg
Here is some actual info to confirm what I and others have said. You cannot vacuum water any more than 33’ at sea level. https://www.nwcg.gov/course/ffm/squirt-water/35-drafting-guidelines Jay > On Jan 27, 2022, at 5:34 PM, frenergy <frene...@psln.com> wrote: > > > OK, I'll gamble some egg on my face. In this case though, you would not be > "pulling a vacuum" with air (a gas) involved. If you can fill the entire > pipe with a liquid (water), the water that's down slope of the water in the > well on the other side of the ridge it would pull the water out of the well > and up over that ridge as long as the pipe exit is below the dynamic water > level in the well and the pipe's intake. > > The caveat: the pipe would have to be filled by pumping out of > the well (one time to set-up this siphon) and the exit end of the pipe would > have to be closed to be able to fill the pipe completely, which would require > an air vent (exhaust vent only, not intake) at the highest point of the pipe > going over the ridge. A valve would also be required at the exit end for > flow control and prevent the siphon from drawing the well dry. The pipe > would have to rated to handle the crushing force of the vacuum being pulled > on the uphill section of pipe after it left the well. There could absolutely > not be any leaks in the pipe. > > I hope my seat-of-the-pants physics is working today. > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049 > > > > > On 1/27/2022 2:28 PM, Darryl Thayer 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 <will...@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 >>> >>> >>> >>> >>> >>> > www.frenergy.net > > Virus-free. www.avast.com > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org >
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