On 01/24/2010 12:19 PM, Jones Beene wrote: > -----Original Message----- > From: Stephen A. Lawrence > >> Not 'of course'. No mechanism has been proposed, nor can I imagine one, > for making the surrounding air get cooler as a result of running an Orbo > > > Michel is probably referring to some kind of Magnetocaloric effect > > http://en.wikipedia.org/wiki/Magnetocaloric_effect
What's magical about the Orbo which would cause this to cool the surrounding air, when the same thing doesn't happen in any other coil which has been studied? As far as I can see from the Wiki page (or "common sense"), air doesn't get cooled by this mechanism. Quote: > "The magnetocaloric effect is an intrinsic property of a > magnetic solid." Air is, of course, neither magnetic nor solid. If this were at work, you'd need to propose that something else, which was made of a suitable material -- maybe the cores -- was getting cold as a result. But that doesn't happen; the cores get warm, not cold. Sean attributes warming of the coils and cores to Joule heating, not pumping heat from the air. As I said, there's been no proposed mechanism which could cool the air around an Orbo -- and, please note, do it only for Orbos, not for "normal" electric motors.
