Rough Rice Drying by Heat Pump Dehumidification

Drying Characteristics and Thermal Efficiency on Recirculating Type Dryer

Abstract

Experiments on dehumidifying drying of rough rice were done assuming the widely used dry-temporary storage system combined with a recirculating type dryer and several newly provided storage bins. The usual kerosene burner in the recirculating type dryer was replaced with a dehumidifier having a heat exchange capacity of 0.3kW. From the experimental results, it was confirmed that even under the slow rate of drying, the recirculating type dehumidifying dryer could dry the rough rice to the needed storage moisture content, maintain the quality and still have a good thermal efficiency.