Study of the ice sublimation process

The basic transfer equations for evaporation of a solid body into vacuum are considered. Experimental results on ice sublimation with thermoradiative and conductive heat supply as well as on sublimation in drying processes and continuous sublimation process from a permeable plate are presented. These studies explain the peculiarities of the sublimation mechanism for different energy supplies and under periodic and continuous conditions of the process. With ice sublimation from a porous permeable plate near a surface, a stepwise change in temperature is observed at a distance of several lengths of the mean free path of vapour molecules.