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what is the use of the water cooling in this honda generator? - Page 4

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Posted by Bruce in alaska on November 1, 2009, 6:43 pm

We use Roof Water (Rain) for our domestic water. We find if we put the
collection gutters so they just barely stick out passed the Steel Roof
edges that the rain then collects in the gutters, but the snow slides
off without tearing the gutters off the eaves. All the gutters weed to
insulated Collection Totes around the cabin, and then we periodically
pump these into Insulated Storage Totes by the Pump House. Each of the
Totes is about 250 USG. the Pump House is totally Insulated, and
contains our 350 USG Domestic Water Tank, which we fill as required,
from the Storage Totes. We have a 12 Vdc Vane Pump that pumps from that
Tank thru a 20 Micron Pre-filter and Check Valve, to a 40 USG Air
Bladder Pressure Tank, with a 50 Psi Cutoff Pressure Switch that
controls the Pump. This then feeds a 1 Micron Water filter and then thru
an Activated Carbon Filter, a 12 Vdc Ultraviolet Sterilizer Chamber, and
then into the Feed to the Cabin, via 1/2" Galvanized, Insulated Pipe
with 3 Watt/Foot Heat Tape, buried down 4 Feet, for the run into the
Cabin. The Heat Tape only runs when the Genset runs, (about 10 Hours a
day) but the rest of the system runs off an 8D 12 Vdc Battery with a
Constant-volt charger that also runs only when the Genset Runs. Our
Backup water is pumped from a local Creek, into a 350USG Tank that fits
in the Back of the 4X4 Pickup, and when things get really Frozen in Feb.
We have to do that on occasion, (Usually only once or twice a winter) to
keep the Storage Totes filled. If we get to much snow for the Truck, we
use snowmobiles towing a 50USG Tote on a sled to bring the Creek Water
to the cabin. We usually can keep the water system maintained in about 2
hours a week. That's not to labor intensive for our situation, as the
Close Neighbors (close = 10 Sq Miles) spend a lot more than that on
their water. Thermalsyphan (convection) Hot water will require an
external Hot Water Pressure Vessel who's lower heating loop line is at
the same level as the lower inlet to the Stack Coil, and the upper Coil
line feeds back to the tanks upper heating loop connection with the
fewest bends, elbows, or restrictions as possible. Cold water should be
inserted into the bottom of the Tank, and Hot Water comes off the Top,
with a 100 PSI Pressure Relief Valve installed. We buy these Pressure
Vessels all ready made up with all the connections Welded in place.
Since this tank is near the Stove, we leave it uninsulated, and it
becomes part of the heating system of the cabin. (Radiator) and it never
gets over about 180F, which is plenty hot for domestic water but not
enough to worry about Steam Generation. The 12 Vdc Vane Pump pressurizes
the whole system just like what you find in town. Hot showers are

Bruce in alaska
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Posted by Mike Romain on November 4, 2009, 3:35 pm

Bruce in alaska wrote:
  The 12 Vdc Vane Pump pressurizes

Very nice writeup, thank you!

I was also wondering about the steel pipe burning a hole in the copper
tube, but see it doesn't seem to be an issue.  Maybe because you use a
stainless pipe?  I know from working as a plumber that galvanized
furnace duct work will burn through copper pipe pretty fast.

Our creek has a 30' drop that ends just below the cabin so we can
actually gravity feed the cabin and I plan on using it for a microhydro
setup. We do like waterpressure though and your pressure tank and 12V
pump idea is what I was contemplating.   Also have 1000' of
riverfrontage with more than a 6' drop so power shouldn't be an issue
for us.

I just have the backup system in now, 1200 or so amps of gel cell
batteries with a Xantrex controller/inverter and an Onan 6.5 Kw 120/240
genset.  Our genset only has to run one day a week to charge things now
so putting a heat exchanger on that will likely be a waste of effort.

Thanks again,

Off the grid in Canada

Posted by Bruce in alaska on November 4, 2009, 8:20 pm

You might just want to look at www.smokstak.com, in their Onan Genset
Forum for helpful information on your Onan Genset. There is a lot of
expertise hang'in out there....

Bruce in alaska
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Posted by Mike Romain on November 4, 2009, 8:44 pm

Bruce in alaska wrote:

Thanks, I am already a member on that site and have gotten some great
help from the folks on it including the service manuals for my unit.  It
is nice to know what I can get out of it with the various winding
configurations and how to fix it.  It is powerful, two 55A main circuits
with 2 120V lines and/or 3 240V lines.  Can do most anything with that.


Posted by Bruce in alaska on November 5, 2009, 7:12 pm

Good deal, BTPost is be happy to know that......

Bruce in alaska
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