Thom,
I'm using a basic window air conditioning unit, freon-22, capillary tube
instead of expansion valve.
The conversion to water cooled allowed me to use a cheap window unit without
hacking a hole in my cabin. I got the idea after getting a good look at
ground source heat pumps, which essentially get heat in the winter and dump
heat in the summer to ground water. I thought, I got plenty of water to do
that, and I don't even have to drill a well! If I get ambitious, I might
even add a reversing valve and extract heat from the bay to heat my cabin in
the Fall. But that's for another day.
Scout

"Thomas Stewart" wrote
The mist is slowly rising, maybe? Are you still using the Freon system
with the Evap. and expansion valve? If so, Why the conversion?
A Confused,
Ole Thom

Scout,

Slow but finally!! (Comprehension!)

"I'LL DRINK TO THAT!"

Ole Thom

3 Long Islands for me, right in a row please! : )

"Thomas Stewart" wrote
Scout,
Slow but finally!! (Comprehension!)
"I'LL DRINK TO THAT!"
Ole Thom

Scout wrote:

the original unit is a $90 window shaker from Walmart. I
installed the pressure access ports after I removed the condensing coil. I
had to braze the refrigerant line into my tube-in-tube, and I needed a way
to purge with nitrogen while brazing, and then attach vacuum pump, and
finally, charge the unit. So I had refrigeration gauges on the system
during testing. I converted the pressures to saturated temps using the R-22
pressure temperature relationship charts. I also installed temperature
sensing wells at various points in the system, and inserted thermocouples in
them to get feedback.

Wow, that's a lot of work. What do you reckon your time is worth?


The superheat and subcooling values are calculated.

You have to know pressure & temp at two points in the system, and the total
weight of the charge.

After that you
can calculate anything. Without that, no calculation provides any useful data.
Usually output temp, weight of charge,
and watts are the only data.



The delta T I referred to is in/out of exchangers.
The delta T for 'baywater' vs cooling water is about 10 degrees.

Sounds like you are well above the average shade tree mechanic. Can you fix
turbine driven machinery? If so, please consider moving to NC... I want to hire
somebody to do my job so I can retire!

DSK

Great post on the Reefer.... but real Sailors Drink Rum!

CM

"Scout" wrote in message
...
| 3 Long Islands for me, right in a row please! : )
|
| "Thomas Stewart" wrote
| Scout,
| Slow but finally!! (Comprehension!)
| "I'LL DRINK TO THAT!"
| Ole Thom
|
|

My boat's docked in Middle River, Baltimore. You?
--
Scott Vernon
Plowville PA __/)__/)__


"Scout" wrote in message
...
Scott, where in PA do you live? and where do you sail?
I'm in Bucks County.
Scout


"Scott Vernon" wrote in message
...
is that a 150% ?


"Scout" wrote

nice on my Honda EU2000 genny.

"DS King" wrote

... Condensate dumps to bilge

Bad idea. Run it overboard. Fresh water draining into the bilge will
promote
mildew very quickly and make the boat swampy & dank. What's the point of
AC
then?

Apparently that's what some power boats do, they have water running out
constantly at my marina , makes me go potty during the night.


--
Scott Vernon
Plowville PA __/)__/)__

sailing?

"Bobsprit" wrote ...

Actually tried it Monday for the 1st time.

RB

daysailor.


"Bobsprit" wrote in message
...
Where are you going? I am making a run down to Atlantic City for a
weekend of
blackjack and craps (no, not that kind).

I have a lot of people coming sailing this weekend....as the weather is
nice.
I'm taking my parents out Saturday, friends out on Sunday. Tomorrow and
Friday
are night sails where I'll set up the reefing and practice with the
spinnaker.
I wish we could do even a small trip, but it's not to be for the moment.

RB

Beach Haven, N.J. About midway between Atlantic City and Barnegat Inlet.
Scout

"Scott Vernon" wrote
My boat's docked in Middle River, Baltimore. You?
--
Scott Vernon
Plowville PA __/)__/)__


"Scout" wrote in message
...
Scott, where in PA do you live? and where do you sail?
I'm in Bucks County.
Scout


"Scott Vernon" wrote in message
...
is that a 150% ?


"Scout" wrote

nice on my Honda EU2000 genny.