COMPUTER SIMULATION of CAPACITIVE RADIO FREQUENCY (RF) DIELECTRIC HEATING ON VEGETABLE SPROUT SEEDS

Autor: Jun Yang, John Henry Wells, Y. Zhao
Rok vydání: 2003
Předmět:
Zdroj: Journal of Food Process Engineering. 26:239-263
ISSN: 1745-4530
0145-8876
DOI: 10.1111/j.1745-4530.2003.tb00600.x
Popis: The application of a three-dimensional finite-element computer program package, TLM-FOOD-HEATING (FAUSTUS Scientific Corp., Victoria, Canada), on the simulation of capacitive radio frequency (RF) dielectric heating of radish and alfalfa seeds was investigated. Seeds placed inside polystyrene boxes were described as a rectangle, where nonuniform boundary conditions presented complications in the simulation. Temperature and moisture dependent thermal properties and temperature and frequency dependent dielectric properties of seeds were considered in the modeling. the time-temperature profiles of seeds at different locations within the rectangle seeds boxes were simulated. the model was then validated using experimental data. Simulated temperature distribution in seeds was consistent with the measured results. the absolute temperature differences between simulated and measured values in radish seeds packed in a 100 × 25 × 50 mm rectangle seeds box were 1.8C, 1.1C, 8.9C, and 13.6C in the center, top, edge, and bottom locations, respectively, when seeds reached about 80C, and were 0.9C, 2.4C, 7.75C, and 14.3C, respectively, in alfalfa seeds box in the same conditions.
Databáze: OpenAIRE
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