Mathematical Modeling of a Continuous Vibrating Fluidized Bed Dryer for Grain
2012 (English)In: Drying Technology, ISSN 0737-3937, E-ISSN 1532-2300, Vol. 30, no 13, 1469-1481 p.Article in journal (Refereed) Published
A mathematical model for the drying of grain in a continuous vibrating fluidized bed dryer was developed. Simple equipment and material models were applied to describe the process. In the plug-flow equipment model, a thin layer of particles moving forward and well mixed in the direction of the gas flow was examined. Mass and heat transfer within a single wet particle was described by effective transport coefficients. Assuming constant effective mass transport coefficient and thermal conductivity, analytical solutions of the mass and energy balances were obtained. The variation in both transport coefficients along the dryer was taken into account by a stepwise application of the analytical solution in space intervals with averaged coefficients from previous locations in the dryer. Calculation results were in fairly good agreement with experimental data from the literature. However, the results depend strongly on relationships used to determine heat and mass transfer coefficients; because the results from correlations found in the literature vary considerably, the correlations should be adapted to the specific equipment in order to obtain reliable results.
Place, publisher, year, edition, pages
2012. Vol. 30, no 13, 1469-1481 p.
Continuously worked dryer, Dryer simulation, Drying modeling, Drying of particulate materials, Heat and mass transfer
IdentifiersURN: urn:nbn:se:kth:diva-34630DOI: 10.1080/07373937.2012.690123ISI: 000308982400010ScopusID: 2-s2.0-84866644596OAI: oai:DiVA.org:kth-34630DiVA: diva2:422191
QC 201211062011-06-102011-06-102012-11-06Bibliographically approved