Marc,
The ice solution is simpler than a Peltier device and will require less
power from the batteries. It does not require a hull penetration and is
not tricky to design.
Jon
On 7/28/2010 5:20 AM, Marc de Piolenc wrote:
The obvious solution for restricted spaces with DC electrical power
available is thermoelectric (Peltier effect) coolers. They are,
however, tricky to design - the modules sold are always optimistically
rated, so the user has to do his own analysis to get the best possible
COP, which will not be high in any case. They're also not cheap, but
neither is any other solution for this particular application.
Of course there has to be a way to remove heat from the hot side of
the modules, which implies a hull penetration for a cooling loop, and
very careful protection of the modules from corrosion while
maintaining good heat transfer.
It's how I would do the job, though, if it were my sub. No moving
parts, and once it's designed and built, you're finished. There's no
maintenance, no refrigerant recharge (and none to leak into the cabin).
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