A known mass of defined moisture content is filled in the cylindrical
sample tube. The open end of the tube was sealed off with a
polyethylene foil before the Teflon top cover was placed in order to
prevent the evaporation of moisture. The sample in the tube is
allowed to equilibrate with the ambient temperature. When the
sample attains the constant temperature with ambient temperature,
the power and stop watch were switched ON simultaneously.
The core temperature shown by the thermocouple was noted for
every 30 s up to 20 min. The current was determined to an accuracy
of 0.01 A by measuring at Regulated Power Supply. The thermal
conductivity values are determined using Eq. (3). The moisture
content of the sample were measured before and after the test and
found to be no considerable changes