The infrared drying characteristics of a wetted glass particle layer are studied numerically and experimentally in this paper.One dimensional motion is assumed.The governing mass and energy transport equations are constructed and solved numericcally by an implicit finite-difference method.Drying characteristic curve

efficiency of energy

time change of average moisture content and temperature are obtained

Comparsion with experimental measurement is found to be good.The drying characteristics are influenced by the spectral distribution and intensity of incident radiation

diameter of particle

and depth of particle layer．The drying rate and efficiency of energy of far-infrared drying are greater than those of infrared drying.