Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!crdgw1!powertool!macminn
From: macminn@powertool.crd.ge.com (Stephen R MacMinn)
Newsgroups: sci.electronics
Subject: Re: Cooling of electronic equipment.
Message-ID: <9080@crdgw1.crd.ge.com>
Date: 28 Jun 90 02:52:49 GMT
References: <3739@csccat.UUCP>
Sender: news@crdgw1.crd.ge.com
Reply-To: macminn@powertool.crd.ge.com (Stephen R MacMinn)
Organization: General Electric Corp. R&D, Schenectady, NY
Lines: 27

In article <3739@csccat.UUCP> jack@csccat.UUCP (Jack Hudler) writes:
>I have some electronic equipment that requires cooling. 
>The cabinet is 36 x 30 inche Hoffman enclosure, the cabinet is
>not located close enough to pipe air-conditioned air into it.
>
>I need to find a small cooling unit or heat-exchanger to maintain
>proper temp and humidity.
>

If you can spare the power, you might consider using thermoelectric
coolers.  These make use of the thermoelectric effect: current through
the device cools one junction and heats the other.  You can buy devices
sized suitably for, say, a picnic cooler.  NOTE: efficiency is terrible,
but they're solid state, silent, and EXTREMELY reliable.  The best way
to use them would probably be to put the parts that need cooling on a 
heatsink and cool the heatsink.  You also need a heat dissipator on the
hot side to get rid of the heat you're pumping + the heat dissipated by
the cooler itself.

Sources are:  MELCOR in New Jersey   and  
              MARLOW Industries Inc,  Garland Texas.

They're generally happy to supply application information.

PS: They're fascinating devices, they're also reversible.  heat one side,
    cool the other and you get current (again very inefficient) out the
    wires.