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A Modified Fitch Device for Measuring the Thermal Conductivity of Small Food Particles
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1989
Year
EngineeringSmall Food ParticlesThermal ConductivityModified Fitch DeviceThermal AnalysisThermodynamicsThermal ConductionInstrumentationBiophysicsIndividual Food ParticlesOhmic HeatingPhysicsHeat TransferHeat SinkApplied PhysicsAbstract AdeviceFood EngineeringThermal SensorThermal Engineering
ABSTRACT Adevice was developed for measurement of thermal conductivity of individual food particles. The system is a modification of the Fitch apparatus, the original copper plates have been reduced in size to accommodate small food particles. The sample is sliced to a constant thickness and sandwiched between the two copper plates, one plate acts as a heat sink, and the other plate as a heat source. The instrument was tested for accuracy and calibrated by determining thermal conductivity of glass and comparing the results with measurements made with the Heat Flow Meter (ASTM Standard C5'8-76, ASTM, 1976). Kidney bean samples were also used and results are presented for different moisture content levels.