Re: Cylinder/piston pressure multiplier River water pump

On Jun 29, 7:04 pm, "hhc...@xxxxxxxxx" <hhc...@xxxxxxxxx> wrote:
On Jun 29, 5:38 pm, "Sue..." <suzysewns...@xxxxxxxxxxxx> wrote:



On Jun 29, 9:23 am, Matos de Matos <Matos.de.Matos.

2ad7...@xxxxxxxxxxxxxxxxx> wrote:
Sue...;1173234 Wrote:

On Jun 27, 8:02 pm, Matos de Matos Matos.de.Matos.
2ab8...@xxxxxxxxxxxxxxxxx wrote:-
Submersed water pump for river flows.
Two cylinders, one with 1 meter diameter and the other 0.2
m/diameter.
Pistons are in the same shaft. Area ratio is of 25 X. The bigger
cylinder have a shroud of a diameter of 1.5 meter in both ends and is
open on both sides. When we submerse it in the river flow the water
flows in and pushes the piston. On the other end of the cylinder the
water flows out in the direction of the river flow.
The piston pushes the second piston, in a closed cylinder ( 0,2m/d)
and
pressures water. The inlets and outlets of this double side cylinder
have retention valves to control aspiration and discharged of the
cylinder.
The cylinders rotate on its axis, enabling continuous cycles.
I need to find the pressure on both cylinders, if the flows at 1 m/s,
and power calculations if the pressure water works on micro hydro
turbine to produce electric energy.

--
Matos de Matos-

Don't pistons wear out ?

http://tinyurl.com/4trqjj

Sue...

Yes, they wear out, but take long. Because it will be fabricated in
Angola, and is for pumping water the tolerances can be high to avoid
wear.
I have a blog with the drawings.

http://tidalwaterpump.blogspot.com/

I ned help to calculate the pressure diferential between inlet and
outlet of the big piston to find the pressure in the small cylinder

Lifting a little bit of water with the fall of a large amount
of water should be the same in any country.

These tables for a pistonless machine in terms of
Lift, Fall and Efficiency would get you to a feasible
design for a particular site. Then you will have
some real volumes and rates to calculate the
area of the co-axial pistons and the resultant
pressures.

http://www.thefarm.org/charities/i4at/lib2/hydrpump.htm

I am not a hydraulic engineer but there seems to
be a dam or an enormous turbine missing from
your design if the client is an entire village.

Sue...

Thank you

--
Matos de Matos- Hide quoted text -



Then too Sue, if the stream he was taping energy from had a sufficient
head and flow, capturing the energy would more simple by using an
overshot water wheel coupled to a generator.for electricity. I
realize that this is today a rather obsolete technique, but it is what
powered the mills and machine shops from New Jersey to Maine.

Overshot? Ahhh Now you sound more like a hydraulic engineer.
The pretty pictures I have seen look like about a few meters
of fall or head or whatever that some local restriction has
to produce.

By "enormous turbine" I was aluding to an undershot wheel
or just a paddle boat wheel the width of the stream, which
is in some sense, a dam.

In either case, I think the OP may be overestimating
the power that can be tapped without a significant difference
in potential across the machine.

Hopefully the tables for the hydraulic ram will
respect the conservation of energy and
make it clear that pistons don't produce a free lunch.

Sue...






Harry C.

.

Relevant Pages

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