MODEL HETEROGEN PENGERINGAN BUTIRAN JAGUNG DALAM UNGGUN DIAM
Abstract
This paper deals with one-dimensional dynamic modelling and simulation of deep -bed com drying by two-phase model or heterogeneous model The models consider mass and heat transfer process within grain and drying air phase. This model also considers moisture content and temperature gradient within grain. The coupled of partial differential equations developed, then solves numerically by finite difference with altemating direction implicit method algorithm. The dynamic models predict not only humidity and temperature of outlet drying air, but also grain moisture content and temperature. The simulated profiles are compared with expenmental data, taken from available literature. The models can describe corn grain drying process in deep -bed dryer. However, the model parameters should be modified to get drying characteristic profiles that closed to the experimenal data.
References
Hellevang, K.J., "Grain Drying", http://ndsuext.nodak.edu/extpubs/plantsci/smgrains/ae701-1.htm, (1994).
Brooker, D.B., F.W. Bakker-Arkema and C.W. Hall, 1978, Drying Cereals Grains, Westport, CN: AVl Publishing Co., Inc.
Palancz, B.,"Moclelling and Simulation of Heat and Mass Transfer in A Packed Bed of Solid Particles Having High Diffusion Resistance", Comp. and Chem. Eng., 9(6), 567-581, (1985).
Mujumdar, A.S. dan A.S. Menon,"Drying of Solids: Principles, Clasification and Selection of Dryers", HandBook of Industrial Drying , 2nd ed., Editor: Mujumdar, A.S., Marcel Dekker, lnc., New York, 1-39, (1995).
Courtois, F.,"Dynamic Modelling of Drying to Improve Processing Quality of Corn", PhD Thesis, ENSIA-INRA, Massy, France
http://www.ensia.inra.fr/~courtois/papers/PhD/PhD.html, (1997).
Thompson, T.L., R.M. Peart, dan G.H. Foster,"Mathematical Simulation of Corn Drying - A New Model", Trans. of The ASAE, 11(4), 582-586, (1968).
Lopez, A., M.T. Pique, dan A. Romero, "Simulation on Deep Bed Drying of Hazelnuts", Drying Technology, 16 (3-5), 651-665, (1998).
Parry, J.L., "Mathematical Modelling and Computer Simulation of Heat and Mass Transfer in Agricultural Grain Drying: A Review" , J. Agric. Eng. Res. , 32, 1-29, (1985).
Gupta, K.L.,"Mathematical Simulation of Deep Bed Grain Drying" , PhD Thesis, Queen's University, Kingston, (1973).
Abid, M., R. Gibert, dan C. Laguerie,"An Experimental and Theoretical Analysis of The Mechanisms of Heat and Mass Transfer During The Drying of Corn Grains in a Fluidized Bed", Int. Chem. Eng., 30(4), 632-642, (1990).
Marinos-Kouris, D. dan Z.B. Maroulls, "Transport Properties in The Drying of Solids", dalam HandBook of Industrial Drying , 2nd ed., Editor: Mujumdar, A.S., Marcel Dekker. Inc., New York, 113-159, (1995).
Sitompul, J.P., lstadi dan l. N. Widiasa. "Modelling and Simulation of Deep Bed Grain Dryers", Proceedings of Asian Australian Drying Conference 1999, Bali, Indonesia, pp. 188-195, (1999).
Zahed, A.H. and Epstein, N.,"Batch and Continuous Spouted Bed Drying of Cereal Grains . The Thermal Equilibrium Model", Can. J. of Chem. Eng., 70 (October), 945- 953, (1992).
Davis, M.E. "Numerical Methods and Modelling for Chemical Engineers", halaman 212-214, John Wiley & Sons, lnc., New York., (1984)."f
