Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.biortech.2004.12.016
Title: A diffusion model for drying of a heat sensitive solid under multiple heat input modes
Authors: Sun, L.
Islam, M.R. 
Ho, J.C. 
Mujumdar, A.S. 
Keywords: Conduction
Convection
Diffusion
Potato
Radiation
Two dimensions
Issue Date: Sep-2005
Source: Sun, L., Islam, M.R., Ho, J.C., Mujumdar, A.S. (2005-09). A diffusion model for drying of a heat sensitive solid under multiple heat input modes. Bioresource Technology 96 (14) : 1551-1560. ScholarBank@NUS Repository. https://doi.org/10.1016/j.biortech.2004.12.016
Abstract: To obtain optimal drying kinetics as well as quality of the dried product in a batch dryer, the energy required may be supplied by combining different modes of heat transfer. In this work, using potato slice as a model heat sensitive drying object, experimental studies were conducted using a batch heat pump dryer designed to permit simultaneous application of conduction and radiation heat. Four heat input schemes were compared: pure convection, radiation-coupled convection, conduction-coupled convection and radiation-conduction-coupled convection. A two-dimensional drying model was developed assuming the drying rate to be controlled by liquid water diffusion. Both drying rates and temperatures within the slab during drying under all these four heat input schemes showed good accord with measurements. Radiation-coupled convection is the recommended heat transfer scheme from the viewpoint of high drying rate and low energy consumption. © 2005 Elsevier Ltd. All rights reserved.
Source Title: Bioresource Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/54067
ISSN: 09608524
DOI: 10.1016/j.biortech.2004.12.016
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