1993 Volume 55 Issue 3 Pages 33-39
Using experimental results on rough rice drying with application of heat pump, this study considered a dehumidifying dryer composed of three heat exchangers as a lump-up system, namely, evaporator, condenser and drying column. First, fluid exit temperatures were predicted by having inlet temperatures as inputs to a computer program written after formulating the heat balance equations. Except in a few cases, the experimental values agreed closely with measured values to within 1°C or less. This difference can be reduced further if the sensors are adjusted to measure entering fluid temperatures properly. The computational method and the Heat Utilization Factor attained with these temperatures would be useful for monitoring the operative state of dehumidifier.
