On the investigation of heat transfer in the presence of chemical conversions

The simplest boundary problem of unstationary heat-conduction equation, with the source depending on temperature as exp (—E*/T) is investigated in this paper.

The uniform convergence of successive approximations is proved for the corresponding integral equation; the solutions have been calculated in the first approximation at various limit cases. It has been also shown here that in the absence of “sexplosion” the temperature at each point will not exceed at any moment of time the corresponding stationary temperature.     

MEASUREMENT OF THE THERMAL CONDUCTIVITY OF FIRELAY REFRACTORIES*

Thermal conductivity determinations have been made on superduty fire-clay, silica, and kaolin refractories, using the Globar-heated, water calorimeter apparatus previously described. The arrangement, which is satisfactory for insulating firebrick, gives considerable error when firebrick samples are tested. Results obtained by different arrangements of the guard samples and heating elements are shown as well as a final arrangement which gives a satisfactory condition of parallel heat flow.