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The objectives were to compare equilibrium and non-equilibrium heat and mass balance models and to determine the relative importance of several parameters in a non-equilibrium model for simulating stored wheat aeration in Winnipeg, Canada with linear and non-linear airflow distributions. Predicted grain deterioration for each grain layer was compared after 3 months of storage for various input conditions. The relative importance of each parameter was determined by changing it within its expected range of variation and by calculating the effect of this change on the predicted grain deterioration, after 3 months of storage. The equilibrium and non-equilibrium models were not significantly different for most conditions analyzed when ventilating from 0000 to 0600 h. The most important parameter to simulate aeration of wheat stored for 3 months in Winnipeg, Canada was the parameter N in the thin-layer drying equation followed by the EMC desorption equation, fan temperature rise, and parameter K' in the thin-layer welting equation, which were equally important. The deterioration model must be improved because the uncertainty in the calculation of wheat deterioration is much higher than the uncertainty generated by the equations used in the computer program for simulating aeration of stored wheat, wheat bulk density can be considered constant, the net heat of sorption can be neglected, and the ratio of bin diameter to bin height is not important in the mathematical model.
R. Sinicio and W.E. Muir 1996. COMPARISON AND SENSITIVITY ANALYSES OF MODELS FOR SIMULATI 'G AERATION OF STORED WHEAT. Canadian Agricultural Engineering 38(3):183-193.
Canadian Society for Bioengineering