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 <darylsol...@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 <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 >> >> >> >> >> _______________________________________________ >> 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 >> >> _______________________________________________ > 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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