Qustion for someone experienced with Grundfos SQ-FLEX [RE-wrenches]

[Jay Peltz, Peltz Power]

Hi Steve,

I've designed a harris wheel and housing attached to a rotary vane pump,
which won't work so well for an AC well pump, but might work via a belt to a
jack pump??

just a thought,

jay

peltz power



----- Original Message ----- 
From: "Steve Willey, Backwoods Solar" <steve at backwoodssolar.com>
To: <RE-wrenches at topica.com>
Sent: Friday, February 27, 2004 6:37 PM
Subject: Qustion for someone experienced with Grundfos SQ-FLEX [RE-wrenches]


> I have an unusual application requested for a nearby Forest Service
> campground project. They have a fine hydro site for a Harris unit,
probably
> yielding 300 - 350 watts (170 foot head on full 4 inch pipe with more than
> enough flow).  The unusual part is the application:  a submersible pump to
> pump minimum 1000 gallons per day up 270 feet head through a 1 inch pipe
of
> great length from a 4 or 5 gpm drinking water well source. The hydro
turbine
> and well are located together, and about 25 miles from commercial power.
> This replaces an engine generator manually started each day. The hydro
> driven pump is intended to operate full time, no start or stop except in
the
> event of dry-run protection.
>
> My first thought was ETA or Grundfos Flex pump. The SQ-Flex pump 3SQF-2
> seems well able to deliver over 150 gallons per hour at a 266 ft lift
using
> 270 watts.  All good numbers showing more than enough water at the lift
> head, volume still within the well source's capability, and just under the
> probable hydro output with one nozzle.
>
> The big unknown is whether it would be possible to power the pump direct,
no
> batteries, from a Harris turbine DC output. I have not used the Flex pump
> before and am
> not familiar with SQ Flex power requirements regarding surge (none),
> noise tolerance, and inductive nature of rectified alternator output
power.
> I do happen to have in stock a 300 and
> a 600 watt Hydromax adjustable LCB control that could be used to interface
> and control voltage loading of the alternator, but the pump is claimed to
> have built in MPPT for solar. Grundfos also offers an IO-102 control for
H80
> windmill connection, that might just be the solution here. I wonder how it
> would respond to the power
> curve and noise of rectified DC from 3 phase alternator output.   We hope
to
> avoid batteries here, but I know addition of batteries would certainly
> remove the questions from this installation.... until the batteries go bad
> and no one has noticed. And it would take a lot of batteries for the 110
> volts to meet the charted performance specs. Does anyone have experience
> coupling a Harris type alternator DC output directly to a
> Grundfos Flex pump in the power and performance ranges listed above?
>
> Steve Willey,
> Backwoods Solar Electric Systems
> steve at backwoodssolar.com
>
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