The relative humidity of air at three different locations as shown in Fig. 1
was measured by using a sling psy chrometer (two mercury thermometers
of accuracy ±0.5 °C one covered with wetted cloth) based on the
measured dry and wet bulb temperatures. Energy consumption of the
compressor and blower were measured separately with energy meters
(for measuring the total energy consumption through out the drying
period) having ±0.5% accuracy.