siphon water uphill
siphon water uphill
(OP)
I am starting a feasibility study for a client that wants to move pond water uphill by siphon. The system would be primed with a small jet pump at the lowest pond (pipe inlet elevation 92.00). The stand (riser) pipes will be limited to 20ft lift (site restrictions). My initial research concening Bernoulli's equation shows a max lift of clean water of 10 meters (~32.8 ft). How do I determine density of fish pond water and what affects will the impurities have on my ability to keep a siphon at the crest. If my elevation difference between pond water surface levels is a max of 35 ft, what is the best way to determine the number of stand (riser) pipes needed to move the water uphill by siphon only? Seems like it should be feasible. Just need a place to start. See attachment for clarification.





RE: siphon water uphill
RE: siphon water uphill
There is an old mechanical type pump that can allow you to do this. Don't remember the name or how it works.
RE: siphon water uphill
RE: siphon water uphill
Hydraulic ram pumps
A hydraulic ram is a water pump powered by hydropower.
It functions as a hydraulic transformer that takes in water at one "hydraulic head" (pressure) and flow-rate, and outputs water at a higher hydraulic-head and lower flow-rate. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started.
The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower, and a need for pumping water to a destination higher in elevation than the source. In this situation, the ram is often useful, since it requires no outside source of power other than the kinetic energy of flowing water.
RE: siphon water uphill
RE: siphon water uphill
If this were possible, then you could have a perpetual motion machine.
RE: siphon water uphill
You need somewhere around 1.5 HP for each 100 gpm you lift by 35 ft. Even more with small diameter pipe.
Only put off until tomorrow what you are willing to die having left undone. - Pablo Picasso
RE: siphon water uphill
I'd be glad to see your Bernoulli calculations, but I guess that the 10 meter you mentioned, comes from the 1 bar atmospheric pressure converted mistakenly by you in one side of the Bernoulli equation.
10 meter is the maximum theoretical height that water can go up provided that the outlet of the pipe is lower than the inlet by a minimum static height that could compensate the pipe friction losses. The friction depends on flow, so the more flow needed, the lower the outlet should be (comparing to the inlet). You can take a plastic tube and experiment it yourself. Do you think by putting one side of the tube in a pool, water comes upward in the tube if the other side is located in a higher level?!
Water never goes uphill unless you add energy to it. ram pumps, air lifts, etc, are along this line.
And nothing is for free. Perpetual machine has fascinated human mind over centuries. Your prefeasibility study is not the last one. However, as mentioned by BigInch, there is a possibility of transferring water from pond 2 to pond 1. Implementing Bernoulli, the positive static head could flow the water toward pond 1.
RE: siphon water uphill
RE: siphon water uphill
RE: siphon water uphill
Regards
StoneCold
RE: siphon water uphill
On the other hand , I do have 2 Koi ponds with 10' elevation difference and a 50' "river" between them .However, I use a plain old electric pump to return the water.