2005 Volume 67 Issue 2 Pages 53-60
The effective thermal conductivity of the wheat bed was measured by the transient heat flow method using twin probe at selected moisture contents and temperatures. Two kinds of fluid, such as the air and corn oil, were used to fill the gap in the bed. The effects of the moisture content and temperature on the effective thermal conductivity of the wheat bed were investigated. Then, the thermal conductivity of wheat kernels was estimated using the compound model of the series model and the parallel model, and was represented as a function of both moisture content and temperature. In addition, the parameter A, which was the parallel fraction of the compound model, was represented as a function of moisture content, temperature and porosity, and the heat conduction model which was suitable for the prediction of the effective thermal conductivity of wheat bed was proposed.
