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CD-ROM Aktief 1995 #3
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CDA3.iso
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PUMPS.008
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1992-05-19
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BBS: the Crystal Mountain BBS
Date: 05-09-92 (00:25) Number: 3886
From: DON KULHA Refer#: NONE
To: ALL Recvd: NO
Subj: Water 2 of 4 Conf: (16) HomePwr
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The SolarJack Pump
SolarJack pumps work in much the same manner as the jack pumps used
for years on wind mills. The pump itself is a piston type and is
located deep down the well. In the White's case, 399 feet down from
the top of the well casing. The piston and cylinder are attached
to the 2 inch diameter steel pipe that extends down the well. In
the Whites case we used 19 sections of steel pipe each 21 feet long.
The pump piston is mechanically activated by a fiberglass rod that
connects the piston to a power source at the well head. This rod
rides within the 2 inch galvanized pipe which brings the water to
the surface. The power source at the well head lifts the fiberglass
rod and all the water in the 2" pipe from the piston to the well
head and beyond. The cylinder on the SolarJack we installed is 1
and 7/8 inches in internal diameter, and the finished setup had a
piston stroke of 7 inches.
The advantage of the jack pump design is its ability to lift water
from very deep wells without having to install an electrical motor
within the well casing. The power source for lifting the rod is
at the well head. The motion of the pump is really slow in comparison
with other types. Slow motion means reliability. In this case,
the fiberglass rod was being lifted about 30 times per minute.
INSERT PUMP GRAPHIC
An electrical motor on the well head portion of the SolarJack provides
the basic motive power for the pump. The motor used on this SolarJack
is a 90 VDC,1750 RPM, Honeywell unit rated at 3/4 horsepower. This
motor is geared down via a toothed belt & pulleys, and then through
a gear case. The motion is translated into reciprocating up and
down from rotary by a mechanical setup that closely resembles an
oil pumping derrick. The derrick is coupled to the fiberglass rod
via steel cables attached to a polished stainless shaft that passes
through the well head seals.
INSERT SOLARJACK PHOTO
The electricity to power the DC motor is provided by eight Kyocera
48 Watt photovoltaic modules. The modules are series/parallel wired
in a 4X2 matrix to produce an array with a nominal output of about
6 Amperes at 64 Volts DC or 380 Watts. The system uses no batteries.
When the sun shines, then the pump operates. The SolarJack uses
a Linear Current Booster (LCB) to make the DC power from the PV array
more compatible to the motor (see Larry Elliott's article on LCBs
in this issue).
--- Squish v1.01
* Origin: Sonoma Online, R.F.E. (707)545-0746-HST\V32b (1:125/7)