Change by mass exchange through a driving potential gradient

Abstract

Among the various ways to improve the processes of heat and moisture exchange and modes of dehydration of grain products, a separate area should be the method of the specified parameters of moisture absorption capacity of working gases. However, currently in the technology of known domestic and even modern foreign drying units, the influence of the actual pressure of the gaseous medium in the layer of dehydrated bodies is either ignored or not fully taken into account, referring to the error of the process. Material and methods: mathematical modeling and empirical analysis, criterion equations, testing. Results. We have note that at different pressure gradients and the same energy flow of working gases up to 1.8 kPa, the intensity of moisture exchange in real production conditions of the modernized drying unit varied not within the theoretical 4% obtained by known calculation formulas, but in 5– 6 times more - by 22 – 25%.