On Mon, 28 Nov 2005 12:30:41 -0400, Terry Spragg
wrote:

Tell us about the water cooled air conditioners, please!

===========================================

What do you want to know? They are fairly common on power boats where
you've got enough power to run things like that. My trawler has 4
water cooled air conditioners with reverse cycle heating, 2 water
cooled refrigeration units, and a water cooled freezer. Fortunately I
have a neighbor here in FL that knows how to keep it all running. :-)
The fridges and freezer have individual circulating pumps for their
condensing units (small gas/water heat exchanger coils), and the A/Cs
are all driven from one large circulating pump similar to what you
would use for a swimming pool filtration system.

Larry wrote:
Lloyd Sumpter wrote:

She's "toilet-trained" meaning she uses a toilet rather
than a litterbox, so I suspect I can easily train her to
use the head (but I'd have to flush it!).

I wanna watch her in 25 degree rolls and pitch and yaw....(c;
Poor cat can't hang onto the towel racks like I do...

How's her "aim"??

Maybe you should give her a litter box too. Otherwise if she
has trouble using the head when the boat is moving too much
she may decide to use your bed instead.

Wayne.B wrote:
On Mon, 28 Nov 2005 12:30:41 -0400, Terry Spragg
wrote:


Tell us about the water cooled air conditioners, please!


===========================================

What do you want to know? They are fairly common on power boats where
you've got enough power to run things like that. My trawler has 4
water cooled air conditioners with reverse cycle heating, 2 water
cooled refrigeration units, and a water cooled freezer. Fortunately I
have a neighbor here in FL that knows how to keep it all running. :-)
The fridges and freezer have individual circulating pumps for their
condensing units (small gas/water heat exchanger coils), and the A/Cs
are all driven from one large circulating pump similar to what you
would use for a swimming pool filtration system.


What mechanism provides the cold?

Do you have an airconditioner pump, evaporator and condenser to cool
recirculated water?

I was twigged when you indicated water cooled A/C, and was hoping
your system used cool sea water to provide modest cooling to the
cabin, with no power needed to actually chill the water.

Guess not.

Thanks,

Terry K

Terry Spragg wrote in
:

What mechanism provides the cold?

Same as any window unit....Freon, mostly R-22 but more R-134A these days
at lower pressures. The difference is the condensor is cooled with
seawater. There's a pipe-in-a-pipe. The inside pipe is where the high
pressure freon is pumped by the AC compressor. The outside pipe has a
flow of seawater going through it at no pressure at all...from a little,
cheap plastic pump whos strainer soon fills with some of the nastiest
prehistoric creatures on earth sucked up from the sealife that lives
under a marina dock....blocking the strainer, zeroing out the seawater
flow, overpressuring the backed up freon condensor and causing a tripout
from high head pressure on the AC compressor.....It's inevitable...(c;


Do you have an airconditioner pump, evaporator and condenser to cool
recirculated water?

The water is raw seawater, not recirculated. It eventually eats the
condensor from its caustic contents. (see pipe-in-a-pipe above). The
freon parts, except for this seawater condensor, are the same cheap crap
from a window airconditioner....marked up to amazing "marine" prices, of
course.


I was twigged when you indicated water cooled A/C, and was hoping
your system used cool sea water to provide modest cooling to the
cabin, with no power needed to actually chill the water.


Nope...it's just an air conditioner cooled with seawater.

Anyone in a boat with any brains will do what the tugboat operators
do....go to a MOTORHOME dealer and buy a rooftop AIR COOLED AC unit for
$2000 less money. No seawater flooding from a broken hose. No creatures
to clean out from tiny strainers all clogged up that bite like hell. No
duct work hogging valuable STORAGE SPACE at a premium inside the boat.
No losing valuable locker space for the damned NOISY air conditioning
unit INSIDE the living space, half of who's cooling capacity is cooling
its OWN STUPID HEAT. The RV AC unit has the noisy compressor and fan
OUTSIDE the living space so if you have a 12000 BTU unit, you get to use
all 12000 BTU cooling the space....not the hot compressor, hot fan motor,
hot seawater condensor, etc.

"Marine" air conditioners are really stupid on small boats like
sailboats. It was OK on the Hatteras because it was in the bilge, not
the sleeping space!

Thanks a bunch! good gen.

Terry K

Larry wrote:
Terry Spragg wrote in
:


What mechanism provides the cold?


Same as any window unit....Freon, mostly R-22 but more R-134A these days
at lower pressures. The difference is the condensor is cooled with
seawater. There's a pipe-in-a-pipe. The inside pipe is where the high
pressure freon is pumped by the AC compressor. The outside pipe has a
flow of seawater going through it at no pressure at all...from a little,
cheap plastic pump whos strainer soon fills with some of the nastiest
prehistoric creatures on earth sucked up from the sealife that lives
under a marina dock....blocking the strainer, zeroing out the seawater
flow, overpressuring the backed up freon condensor and causing a tripout
from high head pressure on the AC compressor.....It's inevitable...(c;


Do you have an airconditioner pump, evaporator and condenser to cool
recirculated water?


The water is raw seawater, not recirculated. It eventually eats the
condensor from its caustic contents. (see pipe-in-a-pipe above). The
freon parts, except for this seawater condensor, are the same cheap crap
from a window airconditioner....marked up to amazing "marine" prices, of
course.


I was twigged when you indicated water cooled A/C, and was hoping
your system used cool sea water to provide modest cooling to the
cabin, with no power needed to actually chill the water.



Nope...it's just an air conditioner cooled with seawater.

Anyone in a boat with any brains will do what the tugboat operators
do....go to a MOTORHOME dealer and buy a rooftop AIR COOLED AC unit for
$2000 less money. No seawater flooding from a broken hose. No creatures
to clean out from tiny strainers all clogged up that bite like hell. No
duct work hogging valuable STORAGE SPACE at a premium inside the boat.
No losing valuable locker space for the damned NOISY air conditioning
unit INSIDE the living space, half of who's cooling capacity is cooling
its OWN STUPID HEAT. The RV AC unit has the noisy compressor and fan
OUTSIDE the living space so if you have a 12000 BTU unit, you get to use
all 12000 BTU cooling the space....not the hot compressor, hot fan motor,
hot seawater condensor, etc.

"Marine" air conditioners are really stupid on small boats like
sailboats. It was OK on the Hatteras because it was in the bilge, not
the sleeping space!

On Mon, 28 Nov 2005 23:20:23 -0400, Terry Spragg
wrote:

I was twigged when you indicated water cooled A/C, and was hoping
your system used cool sea water to provide modest cooling to the
cabin, with no power needed to actually chill the water.

============================================

No unfortunately not, everything requires lots of power, not really
feasible unless you are dockside or have a generator.

On Mon, 28 Nov 2005 23:31:49 -0500, Larry wrote:

"Marine" air conditioners are really stupid on small boats like
sailboats. It was OK on the Hatteras because it was in the bilge, not
the sleeping space!

========================

Most of the Hatts I've seen have them on an elevated rack in the
engine room. Bilge indeed...

Wayne.B wrote in
:

Most of the Hatts I've seen have them on an elevated rack in the
engine room. Bilge indeed...



In the Hat 56, circa 1981, they're mounted on a rack with a common water
pump and supply manifold to a common overboard drain above the waterline
on the port side of the little generator house under the galley
deck....actual in the bilge with the galley raised up about 4' so you can
crawl around on your knees inside there where it's 105F on a "normal" day
with some of them running...120F if one of the 2 gensets is lit off...