Abstract
Values of surface heat transfer coefficients of heating and cooling media, thermal diffusivity of plastic wall and plastic wall-to-food contact conductance were simultaneously estimated using a numerical model together with a multivariable optimization technique. These properties were determined by comparing model-estimated and experimentally determined temperature profiles at several locations inside a plastic can filled with a conduction-heated food simulant. The estimated thermophysical property values were used to compute nutrient retention, sterilizing values and processing time for foods processed in cylindrical plastic cans. The effects of thermophysical properties of the plastic wall on temperature response and nutrient retention in the food were also studied.
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