Re: heating pools...makes too much sense. Amazes me that people heat pools with electricity when we have sunlight.
Affluent society...yes, from there comes waste through convenience, or in some cases waste is deliberate.https://en.wikipedia.org/wiki/Handicap_principlehttps://en.wikipedia.org/wiki/Conspicuous_consumption
I'm hoping that some variation of this idea in some setting can pay for itself in 3 years. That would be equivalent to 26% APR on investment without the risk of the stock market or a startup venture. Any smart business person would be all over that.
I'll look into some other pipe shapes.... Thank you.
Grass...yes the evaporative cooling would lower the surface temp. A cheapskate version, something I would do, is to hook up a misting system near a window AC. Any time a sensor detects movement of the condenser fan, the misting system comes on. It would greatly increase the cooling ability of a cheap AC unit, but unfortunately it would use water. It would not increase humidity inside the house as long as the AC is set to recirculate.
A penny saved is greater than a penny earned because you don't have to pay taxes on it.