Drying steps under superheated steam: a review and modeling

Hamawand, Ihsan (2013) Drying steps under superheated steam: a review and modeling. Energy and Environment Research , 3 (2). pp. 107-125. ISSN 1927-0569

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Abstract

Superheated steam drying has been a subject of research for many decades. Many researchers have claimed that
superheated steam drying is saving energy and produces better product quality compared to air drying. Superheated steam can be distinguished from air drying by the diffusion step in the drying process. Steam drying does not include moisture diffusion from the interior of the particle to its surface. However, in air drying, diffusion is the main and the limiting step. This paper is presenting a review to the models have been used to describe drying under superheated steam. Also, modelling was carried out to all the steps that take place in the drying process.
These steps are: initial condensation on the surface of the particle, diffusion of the initially condensed vapour to the
interior of the particle, evaporation of the initially condensed vapour and finally drying of the whole particle due to receding core model. Understanding these steps is very important for controlling the quality of the dried products and preventing difficulties such as sticking. These steps were modelled using MATLAB software. Numerical
solutions with finite difference Euler's method were used to solve the equations describe the drying steps. The
theoretical results were then formulated in figures to show the behaviour of the whole drying process. Comparison of the theoretical results from this study with experimental data was left for the upcoming article.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright for this article is retained by the author(s), with first publication rights granted to the journal. This is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 16 Dec 2013 23:09
Last Modified: 10 Sep 2014 22:27
Uncontrolled Keywords: mathematical model; superheated steam; drying; initial condensation; receding core model
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090403 Chemical Engineering Design
09 Engineering > 0904 Chemical Engineering > 090408 Rheology
09 Engineering > 0910 Manufacturing Engineering > 091006 Manufacturing Processes and Technologies (excl. Textiles)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.5539/eer.v3n2p107
URI: http://eprints.usq.edu.au/id/eprint/24392

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