Date: Tue, 28 Jul 1998 09:46:13 GMT From: jaldr@onramp.net (James Aldridge) To: cp@opus.hpl.hp.com Message-Id: <aabcdefg2505$foo@default> Subject: Re: Swamp coolers
>Swamp coolers are very simple, but they only cool well in low humidity
>climates. =20
But as temperatures rise during the day, relative humidity typically =
drops. So,
when you need cooling the most, it's there for you. I live near Fort =
Worth,
Texas, USA, and we have moderate humidity in the summer, and my wet wall =
still
keeps greenhouse temperatures well below ambient. Boy am I glad about =
that this
summer!
The wet wall/evap cooler(s) need to be sized to greenhouse volume and =
exhaust
fan(s) capacity to work most efficiently.
>air through the wet pads, cooling the air
The vaporization of water requires energy, which it obtains as heat from =
the
surrounding air, so air temperature drops. I grow orchids and cp, so the =
added
humidity is a big bonus as well.
Jim
James Aldridge - Fort Worth, Texas, USA
jaldr@onramp.net or jaldr@fwcds.pvt.tenet.edu
http://rampages.onramp.net/~jaldr
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