[volt-nuts] DIY Air bath

Poul-Henning Kamp phk at phk.freebsd.dk
Sat Jan 14 07:06:18 UTC 2012


In message <1326495142.51960.YahooMailNeo at web161706.mail.bf1.yahoo.com>, Randy 
Scott writes:

>>Depends on the temperature difference but I seem to recall that it
>>is something like 1:3.
>
>Forgive my ignorance, but does this mean that it is "harder" to cool
>than it is to heat, given the same magnitude of current through the
>junction?

Yes, running electricity through the peltier heats it.  The heat is
dissipated evenly throughout.

On the warm side you get:
	0.5 * Electrical-heat + Moved-heat

On the cold side you get:
	0.5 * Electrical-heat - Moved-heat


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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