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re: shade for air conditioner?
21 jul 2004
cbhvac wrote:
>> >> >...rainwater does contain minerals.
>>
>> would you care to name these rainwater minerals? :-)
>
>i would not be worried about the minerals...
...since they don't exist :-)
>...as i would be nitrogen oxides, sulfur dioxides, and the carbon dioxide
>and goodies it picks up as it falls... thats just what i want on my aluminum
>coils....acid.... i mean...obviously you have never seen a coil where a dog
>likes to piss on it...
haven't seen anything like that in several years, with a few limestone rocks
in my rainwater tank. we only need ac for a few weeks per year in phila. in
arizona, continuous sprinkling for years degraded a fin-tube connection in one
system, galvanically. nothing to do with minerals, but a concern, after 50k(?)
hours of use.
>water on the coils screws up the charge balance, and while it seems like a
>good idea, if you want a water source ac, go geothermal...
that's a lot more expensive. professor d. y. goswami in gainesville measured
a 22% increase in cop by swamp cooling an outdoor coil. rainwater trickling
is cheaper and seems to do better, by cooling the coil directly instead of the
air surrounding it. my $10 10 watt fountain pump reduces my window ac power
consumption from 1050 to 950 w (including the pump) and lowers the cold air
outlet temp by 10 f.
nick
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