"Bill Oertell" wrote in message
...
Does anyone know if there are any pond pumps that also refrigerate the
water
that passes through it? It's getting really hot here in the Sacramento
Valley.
The pond got to 80 today and could get hotter. Throwing the contents of
the ice
maker into the pond only lowers the temperature by one degree. Not really
much
help.



Place a block of ice in the waterfall, rather then just having a bunch of
ice cubes float around the pond. Cold water does not mix very well with warm
water, because of differing densities. Letting the ice melt slowly, by
cooling lots of water a little bit, it helps evenly cool the water.

For an experiment, fill up 2 glasses, one with hot water, the other with
cold water. Then add a drop of cold food coloring to each. You'll see that
the cold food coloring just sits in the glass of hot water and doesn't mix
very well (unless you stir it)

It also should be noted that it takes a lot of energy to cool water,
naturally lots of energy means lots of money. Assuming my math is correct,
if you have a 1200 gal pond, lowering it 1 degree in 1 hour will mean
disappating 18026.7 BTU in an hour. Assuming that you have a 100% efficent
cooling system, that would mean consuming 5.3 kilowatts/hour. Let's further
assume you run this cooling system for 5 hrs a day, to cool it down 5
degrees a day. Since this would be peak rates, that's 36c/kWh * 5.3 kWh * 5
hrs = $9.54/day.

I've made some fairly generious assumptions here, so it would not surprise
me if a real world set up cost $12/day or more to operate.

Snooze