On 2026-03-13 10:01, Stephen Partington via PLUG-discuss wrote:
it really depends on where that DC is. In AZ/NM, etc., evaporative
cooling is massively efficient. In FL, likely less so.
I wonder... yes evap is most effective in a dry climate. Most of my
life I had Evap coolers. Everyone is phoenix uses A/C or suffers. A/C
recycles so it can continue to reduce the temp. Evaps send the cooled
air outside. That means an evap cools the air about 15 degrees adding
maybe 8 more degree reduction because of the breeze... when it is 116
outside the a/c can keep the building cool while that evap is 116-23 =
93 degrees. Now that is only a problem for about 90 days in Phoenix :)
On Thu, Mar 12, 2026 at 5:18 PM rusty carruth via PLUG-discuss
<[email protected]> wrote:
On Thu, 2026-03-12 at 16:37 -0400, Stephen Partington via
PLUG-discuss
wrote:
I would like to see that no water DC. to me, that is the way to go
at
this rate of expansion. Most of those DCs are probably using water
tower evaporation cooling. which is why they consume the water
rather
than recycle it.
I've always wondered about the efficiency of water cooled vs
'normal'
AC units. So, I did a search, and apparently water cooled used to be
more efficient (assuming plenty of water available), but not so much
any more.
https://www.araner.com/blog/water-cooled-systems-and-air-cooled-systems
has a comparison (they make both systems)
However,
https://www.energyresourcesgroupinc.com/erg-bulletin/air-vs-water-cooled-equipment/
says that water cooled can be 2x (or more) efficient than
air-cooled.
And then there's this
https://noraideas.com/air-source-heat-pump-vs-water-source-heat-pump/
which looks like slightly different technology than water
tower-based.
So, now I know - it depends ;-)
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--
A mouse trap, placed on top of your alarm clock, will prevent you from
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Stephen
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