Modelagem Matemática do Resfriamento de Massa de Grãos Armazenados em Silos com Aeração
DOI:
https://doi.org/10.5540/tema.2007.08.01.0099Abstract
Neste artigo, foi realizado um estudo teórico-experimental sobre o estado térmico de uma massa de grãos de soja armazenada em silos sujeita a aeração. Para simular a dinâmica de resfriamento foi proposto um modelo matemático, que se apresenta como um caso intermediário entre o problema de estado térmico de um corpo constituído por dois materiais diferentes (com fronteira fixa) e o problema de Stefan, onde a fronteira móvel separa os domínios de fases diferentes. Foi obtida a solução analítica deste problema e feita a identificação do modelo proposto pelos dados experimentais. Realizou-se a comparação das simulações deste modelo com os dados experimentais e com outros três modelos matemáticos já conhecidos na literatura.Foi mostrado que o modelo proposto neste trabalho, descreve razoavelmente o processo de resfriamento.References
F.W. Bakker-Arkema, L.E. Lerew, S.F. Deboer, M.G. Roth, Grain dryer simulation, Agricultural Experiment Station Report, Michigan State University, East Lansing, MI, 224 (1974).
F. Courtois, A. Lebert, J.C. Lasseran, J.J. Bimbenet, Simulation of industrial dryers: solving numerical and computer problems, Drying Technology , 9, No. 4 (1991), 927-945.
A. Hunter, Temperature and moisture front movement in an aerated seed bulk, Journal of Agricultural Engineering Research, 40, No. 2 (1988), 113-127.
O.A. Khatchatourian, D.L. Savicki, Mathematical modelling of airflow in an aerated soya bean store under non-uniform conditions, Biosystems Engineering, 88, No. 2 (2004), 201-211.
O.A. Khatchatourian, F.A. Oliveira, Mathematical modelling of air flow and thermal state in large aerated grain storage, em “Proceedings of the IADC - 3rd Inter-American Drying Conference”, (V.Orsat, G.S.V.Raghavan, eds.) CD-ROM,IADC, pp.A-12, 2005.
O.A. Khatchatourian, F.A. Oliveira, Mathematical modelling of air flow and thermal state in large aerated grain storage, Biosystems Engineering, 95, No.2 (2006), 159-169.
O.A. Khatchatourian, F.A. Oliveira, N.A. Toniazzo, Air flow and thermal state in large aerated grain storage, em “Proceedings of the COBEM - 18th International Congress of Mechanical Engineering”, (L.G. Trabasso, M. Ziviani, M.P. Barbosa, S.F.M. Almeida, eds.), CD-ROM, ABCM, 2005.
A.V. Luikov, “Theory of Heat and Mass Transfer in Capillary-porous Bodies”, Pergamon, New York, 1966.
S. Navarro, R.T. Noyes (eds.), “The Mechanics and Physics of Modern Grain Aeration Management”, CRC Press, LLC, USA, 2002.
D.B. Sanderson, W.E. Muir, R.N. Sinha, Intergranular air temperatures of ventilated bulks of wheat, Journal of Agricultural Engineering Research, 40, No. 1 (1988), 33-43.
L.E. Sisson, “Fenômenos de Transporte”, Guanabara, Rio de Janeiro, RJ, 1988.
G.G. White, Temperature changes in bulk stored wheat in sub-tropical Australia, Journal of Stored Products Research, 24, No. 1, (1988), 5-11.
Downloads
Published
How to Cite
Issue
Section
License
Authors who publish in this journal agree to the following terms:
Authors retain copyright and grant the journal the right of first publication, with the work simultaneously licensed under the Creative Commons Attribution License that allows the sharing of the work with acknowledgment of authorship and initial publication in this journal.
Authors are authorized to assume additional contracts separately, for non-exclusive distribution of the version of the work published in this journal (eg, publish in an institutional repository or as a book chapter), with acknowledgment of authorship and initial publication in this journal.
Authors are allowed and encouraged to publish and distribute their work online (eg, in institutional repositories or on their personal page) at any point before or during the editorial process, as this can generate productive changes as well as increase impact and the citation of the published work (See The effect of open access).
This is an open access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the
author. This is in accordance with the BOAI definition of open access
Intellectual Property
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License under attribution BY.
