John Lussmyer via EV wrote:
Just depends on the system involved. 0F is WAY above absolute 0. It's
quite possible to make a heatpump that works with a large temperature
difference. It's not going to get a 20x factor like most, but I'm quite
sure that you can make one that is > 1.
Bingo! :-) I think that's the right answer.
"Efficiency" is a measure of how close to the ideal you can get. So you
can have a heat pump that is very efficient at pumping heat up a large
gradient (like from 0 deg.F to 70 deg.F). It's not going to have a COP
of 20; but more like 2.
Still, that would be better than a resistive heater with a COP of 1.
Lee Hart
--
All children are born engineers. Watch them at play. They're not
just playing; they're experimenting, building and learning. That's
engineering! Then we get them in school and squash it out of them.
(Geoffrey Orsak, Southern Methodist University dean of engineering)
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
_______________________________________________
Address messages to [email protected]
No other addresses in TO and CC fields
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/
LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
