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From: pete judd (no email)
Date: Tue Jul 05 2005 - 01:31:45 EDT
Jim, The Steve and Linda Dashew book Offshore Cruising
Encyclopedia has a disscussion on water generators.
Towed, prop shaft power take off, and separate
charging shafts.
On my boat, Im thinking about installing a 8 hp
freshwater cooled Kabota diesel with a 150 amp 12V dc
altenator. These things use around a pint of fuel an
hour and the cooling system can be plumbed through
your hot water heater so that 1 hour a day or less you
charge your battery's and and heat your hot water.
The Kobota packages are much smaller than your old
engine, and are quite quiet.
My 2 cents on the refer. I have a propane refer in my
motor home, that works well if it is kept level but
the higher the ambient tempature the less efficent it
becomes. It has to have a lot of airflow on the back
and top of the unit to get rid of all the heat from
the flame. It is a combo unit, 120V 12V and propane.
If the motorhome is pluged in to "shore power" it
cools great, on propane it cools very well, but on 12
V it will barly cool and draws over 12 amps
constantly. On propane it gulps down the propane.
I have a well insulated top loading refer on my boat,
and useing a alder-barbor type with a 12V donfoss
compressor unit it uses around 65-70 amp hrs per 24
hrs here in the PNW in the summertime. However, this
is a very large refer compartment. On a smaller boat
with a smaller box, and well insulated I think that
you would have lower numbers.
Pete
S/V Murphy's Lawyer
--- Jim Burgoyne <> wrote:
> Good suggestions that I will have to look into.
>
> Dennis, never heard of Nova Cool, but will
> investigate. Also, never
> seen an alternator rigged to the prop shaft, nor
> really understand how
> this works, but will do some hunting on the internet
> and ask around. I
> have a lot to learn about going engineless.
>
> Ken, I know my bias against wind gens is a bit
> silly, and maybe stems
> more from having to listen to them in marinas late
> at night without
> benefiting from the power they provide. I will look
> at the Amp Air;
> sounds too good to be true. I know what you mean
> about rowing oars
> hitting things, and they do increase beam to that of
> a trimaran, but
> you can stop and turn on a dime, brilliant for a
> busy marina (and
> "busy" is a relative term), whereas sculling oars
> are great for going
> one way. I have heard that braking is also possible
> when sculling, but
> again, I have a lot to learn.
>
> Colin, I would consider a propane fridge, but
> wouldn't install unless
> I was convinced they were safe. Maybe then I'd
> install a propane stove
> and chuck my kerosene :)
>
> Thanks for the help,
> Jim
>
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