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re: new efficient ac
5 apr 2005
abby normal wrote:
>the unsuccessful hammering was very relevant and was attempted because
>you were too obtuse and arrogant to realize that you were out to lunch
>on evaporative cooling...
well, i'm sometimes obtuse and arrogant :-) in this case the physics seems
fine, but i couldn't find a way to explain it in the terms you (and most of
the cooler world) were used to. that's my problem. i don't happen to speak
that language, but it still takes about 1000 btu/lb to evaporate water, and
so on... your turn signals may work fine, even if vw calls the controller
a blinkgeber instead of a flasher module. then again, there's non-physics,
eg possible mold problems.
>> >this system sounds like it gets past the outdoor wet bulb limit by
>> >using two processes...
>>
>> picture two efficient indirect evap coolers in series. the first makes
>> air at the wet bulb temp with no increase in moisture content, and the
>> second adds moisture to a part of that air, which cools another part of
>> that air below the wet bulb temp without adding any moisture.
>
>i do not believe this coolerdao has them in series.
well, if we forget about the coolerado system for a moment, would you
agree that the system described above might cool some outdoor air below
the wet-bulb temp without adding water to that air?
>i would guess that this system saturates the indoor air, so that it is
>as cool as possible via evaporative cooling. this air seems to be
>exhausted through a heat exchanger and picks up heat from the outdoor air.
my guess is that it adds moisture to some outdoor air "a" to cool a to
the outdoor wet bulb temp. say that's 80 f. then it uses that 80 f damp
air to cool some different dry outdoor air b to about 80 f and exhausts a,
which never enters the house. then it adds water to the dry 80 f air b
to cool it more, to say, 75 f, and exhausts b, which never enters the house.
continuing this process, we might end up with a little dry outdoor air
that's cooled close to the outdoor dew point, but the temp diffs are small,
so the air-air heat exchangers need to be large, and this system uses more
water than a swamp cooler, for the same btu/h of cooling.
the multi-stage thermo seems obvious. perhaps the patent concerns how to
make the heat exchangers smaller and cheaper and more efficient.
nick
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