Quote Originally Posted by mikesthang View Post
with a humidity in the upper 30's.
30 what? % or degrees?

What's relevant, for cooling purposes is NOT the %, but the dew point temperature, because that determines whether evaporation cooling will work for you.

As far as the question whether such systems can work, they can . . . IF they are designed correctly for your LOCAL conditions. Years ago, I actually spent quite a bit of time looking into designing a modular system that would allow rapid fabrication of effective systems for use with the 50 meter long course pools used in USS events in summer. It can be done, and would be effective, but nozzle selection and flow rates are critical in order to produce results the coaches and swimmers would notice.

However, these would be multi-thousand dollar systems purpose built for individual pools, typically containing 500,000+ gallons of water. Everything would be standard plumbing except for the nozzles, which were specialty items that had to be bulk purchased from the OEM. And some 'tuning' would be required.

I'm not sure that amount of work would have been worthwhile for 500,000 gallon pools. I'm pretty sure it would not be for a 5,000 gallon pool.

If it were me, and I was inclined to experiment, I'd buy a 1/8HP sump pump, some 3/4 PVC pipe and fittings, and a high resolution thermometer . . . and begin playing around. But you'll need to learn your way around a psychometric chart, in order to make some intelligent guesses about what might work. Here's a good one:
http://upload.wikimedia.org/wikipedi...icChart-IP.PDF

Ben