Terry Spragg wrote:
Larry wrote:
Not to mention the COLDER bulkheads of the hull DRIPPING with all that
water....yecch.

Not if you use a heat exchanger type.

Uhm...you haven't lived with a swamp cooler much have you? Come to
Phoenix in August, we'll help you 'see the light' :-)

Polypropelene signboard
sandwiched loosely with geotex wick, seperate forced air through the
channels in the signboard and through the geotex channels comes out a
little more humid,

It comes out a *lot* more humid, or it doesn't cool much. The delta-t is
directly proportional to the evaporated mass and the latent heat of
vaporization.

Here in the desert, you can get a delta-t of 20°F with no problem, at
6500 cfm, when the RH is 10%. When the RH gets 30-40% and the dew
point is 60°F, that delta-t drops to a couple of degrees, and 100%RH
indoors. BTDT, got the wet T-shirt.

but a condensation chamber

Which has to be actively cooled to work (or it will very soon be too
warm to work at all).

and then a re-heater using
exhaust air can dry the slightly re-warmed, cooled, drier air.

Roughly translated to air the same temp as you started with.

Even an
old radiator circulating sea water to cool air could be a huge relief.

Totally different concept, and IMO, a much better approach than swamp
cooling. I've never been on the water, on either coast, where the RH and
dew point were low enough for a swamp to work.

The only power draw would be for the water pump and for the fan, which
needs to be a little stronger than a mere electric motor fan cooled by
the cabin air, a hugely inefficient comfort
generator, actually a heater.

Depends on the water temp, and the size and effectiveness of the heat
exchanger. In San Diego where we sail, it's a great solution. In
southern Florida...A/C gets my vote :-)

Keith Hughes