Bob Cook wrote. "Glass is not a black body in my estimation, and I would
expect it to look
different at any given temperature from a true black body."
Having looked inside 100 operating glass melters at temperatures ranging
from ambient to 1500C, at any temperature where things start to glow
there is not much visible difference between the various materials. For
example at 1500C everything looks blindingly white, the molten glass
surface, the silica superstrucxture, the AZS refactory side walls.
There must be some differences because one can still make out the edges
of the refractory blocks and batch piles floating on the molten surface.
It seems to me there is more a difference in brightness than color
between 1400 - 1500C. Things start looking red at much lower
temperatures. I would quess the E-Cat in the famous photo was 700-900C
Jed, I agree with what you wrote about flow calorimetry being
difficult. It would have been sensible to get confirmation of the
temperature, at least at one spot, by a thermocouple.
I wonder if we have the whole story. That number of people working that
long should have figured out some way to confirm the temperature
indicated by the camera. I know I would. FOr one thing, I have found
the geopmetry of the surface upsets the readings and the surface sure
wasn't flat.
