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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
MODELING MASS TRANSFER THROUGH A POROUS MEDIUM OF A RECIRCULATING MASH SYSTEM
Submission Author:
Julio Santos , RJ , Brazil
Co-Authors:
Julio Santos, Leandro Alcoforado Sphaier, Fernando Peixoto, Vinicius Nunes Henrique Silva
Presenter: Julio Santos
doi://10.26678/ABCM.ENCIT2020.CIT20-0672
Abstract
This paper presents a model for analyzing mass transfer in the saccharification kinetics during the mashing of barley malt in a recirculating mash system. A cylindrical pipe is used to model the internal flow of wort through the grain bed, which is treated as a porous medium. A simple formulation for plug flow and advection in the axial direction are considered and tube wall is supposed to be adiabatic and impermeable. The model was adapted from a previous study to include the effect of convection mass transfer and involves mass balances for starch, dextrins, maltotriose, maltose and glucose, and also for alpha and beta amylase activities, which are responsible for starch hydrolysis. The model is solved by a technical computing tool in order to evaluate the performance of recirculating mash systems.
Keywords
brewing, mashing, convection heat transfer., Porous media
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