actually the phase transition from ice to water is 80 calories per gram whereas the
transition from liquid to gas is 540 calories per gram.
http://weloveteaching.com/fall2005/m...of_matter.html
better to spritz the water up into the air and what falls back is going to be a lot
cooler. best is shade cloth, like 70% or lilies that float and block the sun.
actually, a piece of styrofoam that blocks the sun works too. Ingrid


Take advantage of basic chemistry. Use water in an alternate form. Namely
ice. It takes a lot of heat energy to melt ice. Heat energy that can come
from the pond.
Math:
Heat 2L of ice @ -5C
2000mL * 5C * .5cal/CmL = 5000 calories
Melt 2L of ice
2000mL * 80cal/mL = 160000 calories
Heat 2L of ice water to 26.6C (80F)
2000mL * 1 cal/CmL * 26.6C = 53200 calories

Cool 2000 gal (7570L) pond by N degrees
7570L*1000mL/L * 1cal/mL * N = 218200 calories
N = 0.028C ~= 0.03C






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