"A calibration curve will bend down. It never bends up." this mean that temperature grow less than the power ?
this mean that when you increase the power, and if temperature grows much more that before, something anomalous is happening ? Either excess heat, or some external blanket effect (increase of thermal resistance)... but convection does not diminish with heat? did I undertand well? 2014-10-14 22:09 GMT+02:00 Jed Rothwell <jedrothw...@gmail.com>: > Alain Sepeda <alain.sep...@gmail.com> wrote: > >> >> - is there a simple way , with minimal assumption, to be sure that >> the COP>1 >> >> Look at the color. If it is dull red, it may be around 750°C which is > where you would expect it to be in a straight line extrapolation > calibration up to 800 W. If it is white it has to be around 1300°C, which > is far higher than the calibration indicates it should be. A calibration > curve will bend down. It never bends up. McKubre pointed this out: > > On page 7 of the report the authors state: “Subsequent calculation proved > that increasing the input by roughly 100 watts had caused an increase of > about 700 watts in power emitted.” This is interesting. The shape of the > output vs. input power curve is observed (or implied) to strongly curve > upwards in a manner completely inconsistent with the Stefan-Boltzmann law > for radiative heat loss. It is also inconsistent with simple convective > heat transfer but several issues need to be addressed before we can claim > this as a qualitative or even “semi-quantitative” measure of excess heat > production . . . > > > Note that incandescent colors are similar for all materials. > > - Jed > >
