the raw water cooled engine can be modified to use coolant in the engine and an
external exchanger. Mine is setup that way from the factory (at least looks
that way).
Leslie.
Phoenix C&C32
--------------------------------------------
On Wed, 12/3/14, Graham Collins via CnC-List <cnc-list@cnc-list.com> wrote:
Subject: Re: Stus-List boat heating - was LF38 engine access - how bad is it
really?
To: cnc-list@cnc-list.com, "Hoyt, Mike" <mike.h...@impgroup.com>
Date: Wednesday, December 3, 2014, 3:13 PM
Hi Mike
It is very do-able. Do you have the engine heating a
hot water
tank? Same process essentially. Hot water/glycol
comes out of
the engine, run it thru a Y valve. If set one way
the flow is
through the heat exchanger as usual, but if set the
other way the
hot stuff goes to a heater in the cabin and then into
the heat
exchanger on the engine. You would need:
1) radiator, such
as this one
2) enough hose to connect it all up.
3) a Y valve to select cabin heat or no cabin heat.
4) a T (for the return)
I've got a hydronic heating system on my boat with
two radiators,
my espar heats these and the water tank - but the idea
is the
same. I couldn't go the engine heated route
because mine is a 3GM
= raw water cooled.
If you would like to have a look at my setup we can
arrange it.
Graham Collins
Secret Plans
C&C 35-III #11
On 2014-12-03 11:12 AM, Rick Brass via CnC-List
wrote:
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Mike;
Josh
is correct in saying the “F” in the model
number of older
Yanmar engines designated freshwater cooled, and
the use of
a heat exchanger on the engine. On a freshwater
cooled
engine the water/glycol coolant mix in the block
is
circulated through a heat exchanger – which is
analogous to
the radiator in your car. Raw water, drawn from
outside of
the boat, is circulated through the heat
exchanger and
removes the heat from the water/glycol coolant
before being
used to cool the exhaust gasses and being
discharged
overboard. In your car, the relatively cold air
passing
through the radiator takes the heat away from
the
water/glycol coolant in the engine.
If
there is no “F” in the model number of an
older Yanmar, it
is a raw water cooled engine. Seawater is drawn
from
outside, pumped through the engine to cool it,
then mixed
with the exhaust to cool that, and then
discharged
overboard.
Now
I said “older” Yanmar engines because every
model in their
current product line seems to come with a heat
exchanger and
fresh water cooling.
In
response to another comment made about the
“GM”, “HM”, “QM”
model designation (the current engines are
“YM”) that is a
model series designation. It almost looks like
it relates to
the generation of emission controls present on
the engine. I
notice that the YM series is designed to meet
the diesel
emission standards that started to become
effective in 2011
in the US.
So
“2” or “3” is the number of cylinders.
“GM” etc. is the
engine series. “30” is the nominal
horsepower. And “F” is
freshwater cooled. (On the 4 cylinder engines
“TE” is
turbocharged, and “ETE” is intercooled and
turbocharged.)
Your
idea about having an engine powered heater for
the boat is
an interesting one. It would be relatively easy
to tap the
hot water/glycol cooling system (we do it all
the time now
for installing a water heater on the boat) and
route some of
the coolant through a radiator inside the cabin
(analogous
to the heater core in your car). An electric fan
could
provide air circulation. And you would want to
come up with
some sort of thermostatically controlled valve
to throttle
the flow of hot water to match the heating needs
inside the
cabin. Pretty doable, but the devil would be in
the details.
Rick
Brass
Imzadi
C&C
38 mk 2
la Belle Aurore C&C
25 mk1
Washington,
NC
From:
CnC-List [mailto:cnc-list-boun...@cnc-list.com]
On
Behalf Of Hoyt, Mike via CnC-List
Sent: Wednesday, December 03, 2014
8:29 AM
To: Josh Muckley; cnc-list@cnc-list.com
Subject: Re: Stus-List LF38 engine
access - how
bad is it really?
Josh
I
am guessing heat exchanger that you refer to
does not mean
the same as in everyday life where it can be
used as a
heater for the boat with some reworking. Am I
incorrect? I
have 3GM30F and some days it is miserably cold
while
underway and the option of an onboard engine
driven heater
might be nice
Also.
I think your landfall38s likely have tons more
access than
our frers 33 with an oversized engine. Maybe
Rich and I
will have to compare next summer
Mike
Persistence
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