Published in: CSBE-SCGAB Technical Conferences » AGM Halifax 2016
Download RAW file:
Description: Abstract: The power of commercial computational software (CFD software) in simulating and analyzing complex fluid flow problems in the relatively short period of time was utilised to study the mass and heat transfer phenomena of the Distillers’ spent grain (DSG) pellets dried in superheated steam. A three-dimensional, axisymmetric geometrical model of the DSG pellets and the drying chamber was created. The solution of the governing differential equations for mass and energy balance of the pellet and steam flow around it was obtained by using the finite volume method and SIMPLEC algorithm within a commercial software (ANSYS CFX, version 16.2). The steam flow and temperature around the DSG pellet, the temperature and moisture content of the pellet and the heat and mass transfer rates from the pellets at different operating conditions are reported. The results demonstrated that the computational technique, when applied with appropriate boundary conditions and solid and fluid properties, provides successful predictions of the main features of drying of the DSG using superheated steam, including the decay rate in the moisture content of the pellet and temperature variation within the pellet and in the medium. The validation of the numerical model with experimental observations showed a good agreement. The obtained mathematical model will serve as a basic tool for optimization and design of large scale superheated steam dryers for drying DSG.
Keywords: Distillers’ spent grain, Superheated steam drying, heat and mass transfer, CFD, numerical model
Citation: . 2016. Computational modelling of superheated steam drying of a single DSG pellet. CSBE/SCGAB 2016 Annual Conference, Halifax, 3-6 July 2016.
Conference name: CSBE/SCGAB 2016 Annual Conference, Halifax, 3-6 July 2016.
Session name: Session 4B: Bio-processing and Food Engineering III
Publication type: Conference Proceeding
Language 1: en
Rights: Canadian Society for Bioengineering