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<DIV>Jimmy</DIV>
<DIV>It’s more than increased corrosion due to dissimilar metals.</DIV>
<DIV>Distilled water is totally wrong due to another problem. It’s </DIV>
<DIV>highly aggressive (corrosive), especially to metals like aluminum.</DIV>
<DIV>Quick story: I worked 27 years in industrial water treatment for
</DIV>
<DIV>boiler and mostly cooling towers. Had a MAJOR chip manufacturer
</DIV>
<DIV>(not Intel) that switched water source for their 15 thousand tons of </DIV>
<DIV>cooling water (one large cooling tower) over a weekend from normal </DIV>
<DIV>water supply to plant reject RO water (very, very aggressive water due
</DIV>
<DIV>to almost no buffering minerals in the water) and by the time I got there
</DIV>
<DIV>to the customer’s site on Monday morning the entire tower and all the
</DIV>
<DIV>tower water was red with iron. I don’t recall the pH, but it was
quite </DIV>
<DIV>acidic. Carbonic acid..........the water picked up the carbon dioxide
in the </DIV>
<DIV>atmosphere and turned the no-long buffered water into carbonic acid.</DIV>
<DIV>That’s my story and I’m sticking to it. I was there and I was the
water </DIV>
<DIV>treater.</DIV>
<DIV>Stories like this is what I used when training our reps.</DIV>
<DIV>Steve Hammatt</DIV>
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<DIV style="font-color: black"><B>From:</B> <A
title=mayfield+shoptalk@sackheads.org>Jimmie Mayfield</A> </DIV>
<DIV><B>Sent:</B> Friday, August 11, 2017 6:04 AM</DIV>
<DIV><B>To:</B> <A title=shop-talk@autox.team.net>shop-talk@autox.team.net</A>
</DIV>
<DIV><B>Subject:</B> Re: [Shop-talk] air conditioning misting
system</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV class=moz-cite-prefix>I think I posted to this list 3-4 years ago about
some of my experiments with this. I was scheduled to have a new pair of
heat pumps installed later that week so I wasn't concerned with ruining the
coils. When directly misting the coils, I recall measuring a ~30% drop in
current drawn by the compressor.<BR><BR>I agree, though, that this is probably a
bad idea long term. At minimum, I'd expect scale to build up on the fins
and that'll have a big effect on heat transfer. But even if you're using
distilled water, I'd expect to see increased corrosion where the aluminum fins
contact the copper coils because you're subjecting those junctions to constant
water (more so than normal condensation).<BR><BR><BR><BR>On 08/09/2017 04:32 PM,
john niolon wrote:<BR></DIV>
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<DIV>Anyone have any experience with the mister systems you install on your
evaporator coil in your outside unit... good, bad, waste of time..
or how many thousands of dollars and kilowatt hours have you saved... internet
hype makes them sound like the best thing since they put pockets on
shirts...</DIV>
<DIV> </DIV>
<DIV>john</DIV></DIV></DIV><BR>
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