On Sat, 10 Sep 2011 03:56:22 -0700, Gunner Asch
wrote:
On Sat, 10 Sep 2011 01:24:45 -0500, Richard
wrote:
I've asked a few people about this personally, but I'd like to throw it
open to the larger group as well.
I'm trying to cool the boat for a few days at a time...
A normal 5000 BUT marine air conditioner can pull up to 30 amps of 12
volt power. If my house battery were new and fully charged, that's 4 or
5 hours. That won't get it for even for a weekend.
If we had a diesel engine (and ran it all day) we could use an
automotive approach. But we don't - and can't.
So, quoting Kelly Johnston (one of my favorite heroes),
"Simplicate, and add lightness".
Statement of Problem:
I want to air condition the boat for up to 3 or maybe 4 days at a time.
Independent of dock power.
With as low of a battery load as possible.
Proposed Solution:
A cooler type container with a load of dry ice and a way to move large
amounts of air across the cooler.
A sketch at:
http://www.home.earthlink.net/~cave-1/images/ac-3.jpg
I'm already thinking glycol for the fluid.
But what to make the rest of it from?
Cheap, off the shelf stuff preferred!
A pump that can handle antifreeze?
High torque low power 12 volt DC motors?
What to use for the heat exchangers?
Coils of tubing? Or auto parts?
Other than a drip pan (and a handful of brain cells),
what am I missing?
Thanks all,
Richard
Humidity too high for a swamp cooler?
If he's on the water and needs a/c, probably. As a matter of fact,
he'll need to calculate the load from condensation, about 1000 btu's
per lb. of condensate. That's a major load on a/c's on the Texas
coast. You could get a lb. of condensate out of every 1000 cf or so of
outside air, so it's important to recirculate the air so you only have
to dry it once.
Humidity isn't a problem here in central Texas right now. However, no
outside grilling, smoking, welding, or any other open flame or sparks
are allowed, immediate arrest if caught. I don't know about shooting,
I guess muzzleloaders would be a bad idea. Come on, rain!
Pete Keillor