American Society of Agricultural and Biological Engineers

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Thermal Conductivity of Wheat, Corn, and Grain Sorghum as Affected by Bulk Density and Moisture Content

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Transactions of the ASAE. Vol 29(5): 1447-1450. (doi: 10.13031/2013.30335)
Authors:   C. S. Chang

ABSTRACT THE bulk thermal conductivities of wheat, corn, and grain sorghum were determined at ambient temperature by the line heat source method. The moisture contents of the grain samples ranged from 11 to 18% (w.b.), and the bulk densities ranged from 700 to 880 kg/m^ depending on the type of grain. Under those conditions thermal conductivities ranged from 0.181 to 0.202 W/m-K for hard red winter wheat, from 0.167 to 0.190 W/m-K for soft red winter wheat, from 0.162 to 0.186 W/m-K for corn and from 0.160 to 0.184 W/m-K for grain sorghum. At a constant moisture content, thermal conductivity of each type of grain increased linearly with the bulk density. At a given bulk density, thermal conductivity increased with the moisture content.

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