I think it's a bad idea, and here's why.
First of all, do not confuse temperature and heat.
A car engine generates a lot of heat, but its
temperature is maintained by a very efficient
radiator positioned at the front of car,
to intake cooler air.
A refrigerator lowers the interior temperature
rather slowly, removing only small amounts of
heat from the contents during small intervals
of time, e.g. 5-10 seconds.
If your CPU generates more heat than the
refrigerator can dissipate, your water-cooled
radiator will overcome the maximum rate of
cooling of which the refrigerator is capable.
Just because the interior of a refrigerator is
cold e.g. 34 degrees F. does NOT mean
that the refrigerator can cool its contents rapidly.
A better experiment would be to situate your
computer on the floor of a room with an
air conditioner. If your radiator is placed
at or near the floor, where cold air congregates,
the fan on that radiator will flush it with
cold ambient air, and the warmer exhaust
air will rise naturally (because hot air rises).
The most important variable, under these
conditions, would then be the speed of the
fan on your radiator, just as an increase
in a car's speed necessarily results in
an increase in the velocity of cooler air
entering the car's radiator, causing that
radiator to exhaust hot air faster.
This solution solves several problems at once:
there is no condensation to worry about;
the radiator is guaranteed an unlimited supply
of fresh cold air, as long as the AC's thermostat
is operating correctly; the radiator's
warmer exhaust air will rise to the ceiling,
where it will not recycle back into the radiator;
and, the user(s) are guaranteed a comfortable
air-conditioned environment at or near 72 degrees F.
At that point, it would be ideal to have a way
of exhausting the warmer air that congregates
at the ceiling of this room where your computer
is situated. In our hotel, we have a window AC
unit next to the main outside door, and there
is a ceiling fan in the bathroom that exhausts
moist air to the outside.
This "flow-through" setup quite effectively
cools the P4 workstation which we use to
access the Internet for several hours every day:
our Northwood core rarely goes above 80 degrees F.,
with stock air-cooling.
So, use the KISS principle in engineering:
Keep It Simple, Sally!! aka Occam's Razor:
the simplest solution is always the best solution.
If your experiment fails, you've also ruined
a perfectly good refrigerator. NOT GOOD!!
I hope this helps.
Sincerely yours,
/s/ Paul Andrew Mitchell
Webmaster, Supreme Law Library
http://www.supremelaw.org/