On 9/10/2011 9:08 AM, J. Clarke wrote:
In articled99a4d77-d1a4-47b3-82f4-
, says...

On Sep 10, 5:38 am, wrote:

What is the water temperature? It might be possible to simply use a
heat exchanger to dump heat into the water. In thory, it would even be
possible to get the coolant to circulate without a pump.

When it's 112 in the shade?
Water temp was about 87.

Is that water temperature at the surface? What is the water
temperature ten feet down?

Another approach might be to use a water bed. That 87 degree water is
about ten degrees cooler that your body and in a water bed without
foam insulation between you and the waterbed mattress will feel down
right chilly. Doing something like that could keep you comfortable
while you sleep and reduce the power needed in a 24 hour period.

The question that comes to my mind is "how big is the boat". A water
bed is a large almost-free surface and it could to really bad things to
stability.

That's an important point, of course.

MY boat is 26 feet long, 10 feet beam, and displaces about 6000 pounds.
Call is 500 cubic feet of interior volume.

That much water would be way over weight - a large water bed could
weight 2500 to 3000 pounds!

Not to mention what could happen when tacking!

Ok, it was a hair-brained idea.

But an interesting discussion.