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From: valdes@bgsuvax.UUCP (oscar Valdes)
Newsgroups: comp.sys.ibm.pc.misc,sci.electronics
Subject: Re: Peltier effect device
Keywords: cooling
Message-ID: <6773@bgsuvax.UUCP>
Date: 22 Dec 90 03:45:36 GMT
References: <1990Dec14.213730.10078@spool.cs.wisc.edu> <5070@optilink.UUCP>
Reply-To: valdes@bgsuvax.UUCP (oscar Valdes)
Followup-To: comp.sys.ibm.pc.misc
Organization: MD & MF International
Lines: 19

In article <5070@optilink.UUCP> cramer@optilink.UUCP (Clayton Cramer) writes:
>I can visualize the process by which heat causes electron flow from
>one metal to another (since different metals have different electro-
>negativities) -- for some reason, I can't picture how electron
>flow causes cold.


	See if the following helps.  The electrons, as they flow, carry
heat away from the junction.   In the thermocouple, heating increases the
electron flow.  In the Peltier device, the voltage produces the electron flow
that carry the heat from one metal to the other.  Thus, one metal gets hotter
and the other gets colder.


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	Sooner or later reality bites you in the ass

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