INVESTIGATION OF COMBINED HEAT AND MASS TRANSFER IN GAS INCANDESCENT LAMPS

The theoretical model of heat and mass transfer processes for quasislationary operating conditions of the incandescent lamp was formulated. In this case, the thermodiffusion contribution to tungsten mass transfer and temperature-dependent of transfer coefficients of a working mixture were taken into account. Based on the calculated heat losses from the incandescent body and mass transfer speed of the tungsten atoms in different gas media, effective compositions of multicomponent filling mixture are developed for bispiral krypton general-purpose incandescent lamps (ILs).