ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
AN ANALYSIS OF A THERMALLY-INDUCED VACUUM DRYING PROCESS FOR PERMEABLE MATS
要約
The process of drying an air-free permeable mat having one surface in contact with a heater and the other surface maintained at the initial mat temperature and vapor pressure is investigated. In this situation, the usual vapor removal mechanism (diffusion) is replaced by a strong bulk flow. Mats of a hygroscopic material at low
initial saturation are considered, with the liquid phase assumed to be immobile.
The process is analyzed using linearized governing equations. The results, obtained by a numerical solution method, show that following a mat heatup period and a peak drying rate, a falling rate regime occurs during which an equilibrium moisture distribution is approached. Application of the results to paperboard drying is briefly discussed.
The process is analyzed using linearized governing equations. The results, obtained by a numerical solution method, show that following a mat heatup period and a peak drying rate, a falling rate regime occurs during which an equilibrium moisture distribution is approached. Application of the results to paperboard drying is briefly discussed.