a new low?

[sphelps]

Originally Posted by cwickham

if you run it out of water, then it would still be hotter then it is now, even the "trapped" water will probably only heat up to approx room temperature.

So you've invented a pump that cools? Tanks run around 80, which is about 10 degrees hotter than room temp. Running a pump external increases the temperature gradient and air is still free to flow around the pump to help cool it, so the unmodified pump will likely run around the same, in and out of water.

To explain this in simpler terms, what happens when you wear a jacket in an 80 degree environment? Do you get warmer or stay around room temperature?