Alumina is a top notch insulator and the coil is imbedded in it. More heat must be leaving other routes. Where r the fins? I have not studied the photos.
On Monday, October 13, 2014, H Veeder <[email protected]> wrote: > The banded regions should absorb heat and in the long run reach the same > temperature as their surroundings. The fact that they persist is a sign of > something significant...and I don't mean fraud or incompetence. > > Harry > > On Mon, Oct 13, 2014 at 10:54 PM, ChemE Stewart <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> The coil stays cooler than the core when it is heating thru induction due >> to less resistance in the coil so that is why I think the coil is >> darker/cooler >> >> http://en.m.wikipedia.org/wiki/Induction_cooking >> >> In an induction cooker, a coil of copper wire is placed underneath the >> cooking pot . An alternating ..... In turn, most of the energy becomes heat >> in the high- resistance steel, while the driving coil stays cool. >> >> On Monday, October 13, 2014, H Veeder <[email protected] >> <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: >> >>> >>> >>> On Mon, Oct 13, 2014 at 6:51 PM, Alan Fletcher <[email protected]> wrote: >>> >>>> >>>> >>>> Figure 6 : this is complicated by transmission, which may be happening >>>> in the visible range. (IF the helical shadows are indeed images or shadows >>>> of the coiuls. But I still think they represent different conduction zones >>>> of a ceramic holder, as in the March test). However, this has a broad peak >>>> near the center of the visible range, so the blue might be enhanced a >>>> little. >>>> >>>> >>>> >>> >>> >>> I find it odd the dark bands (a.k.a the "shadows") persist. I can >>> understand how differences in conduction >>> >>> play a role when the reactor first starts but in the long run shouldn't >>> the dark bands disappear? >>> >>> Harry >>> >> >
