Quote:
Originally Posted by Daox
...lack of temperature differential over the radiator input/
output.
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I thought your delta-T was pretty good. Did you measure your water flow through your system?
How did you measure your water-in temp, and water-out temp?
And do you know how much cooling you will need?
Have you calculated how much water flow you'll need for that much cooling?
Gary has a home heating calculator, that looks like it's based on Manual-J. He might have a cooling version, or you might be able to trick it to calculate your cooling load.
Also, I don't know what your water cost is, but don't neglect the possibility of using a sprinkler on the roof with a timer that could turn it on briefly at fairly frequent intervals during the day. Evaporation really helps.
I suggested this to a convenience store owner. He tried it and said that it lowered his inside temp by 10F. Not too bad.
Your humidity is part of the problem and temperature is another part.
-AC