This shows clearly/hazily that there are problems with the electric heating and using hot melt Sn would be better, the differences between the hotcats with fuel and those empty will be easily observable if they exist. However are the Lugano and the MFMP Hotcats really comparable/ Peter
On Thu, Feb 5, 2015 at 8:02 PM, Alain Sepeda <alain.sep...@gmail.com> wrote: > Hi all. > As feared before, it seems the Lugano test may only show a reactor at > 900C... > maybe a little higher is anyway the emissivity is reduced in the waveband > 7.5-13um, . > > This maybe an explanation for another mystery : the apparent negative > temperature coefficient observed from 450 to 800W > > If you look at SiC heating elements, > http://www.practicalcontrol.com.au/silicon_carbide_control.html > you can see that from 450C to 1000C (Hot Rod) resistivity fall from 230% > to 100%, and only grow again at 1000C > > > http://www.practicalcontrol.com.au/images/graphs/silicon_carbide_res_temperature.png > > this is less than the observed excusion, but not far. > some bad interpretation linked to the change in waveform may be > responsible from aditional anomaly. > > It is also possible that the SiC be of different quality with a stronger > NTC than "Hot Rod" ? > > > -- Dr. Peter Gluck Cluj, Romania http://egooutpeters.blogspot.com
