Studies on the Drying of Agricultural Products by Using Far-infrared Ray (Part 1)

The Performance of the Drying device and the Heating Properties of the Agricultural Products

Abstract

In order to improve the drying quality of agricultural products and reduce drying cost, a multi utility far-infrared drying device was made. Characteristics of the drying device were measured and heating performances of the agricultural products were investigated.
The following results were obtained:
(1) Among several minutes of heating, the surface temperature of the bar-heater raised to a constant temperature. In order to get a uniform temperature on a sample plate, the heater were placed on the focus of the radial ceiling of the device.
(2) By using the far infrared heater, the surface and internal temperature of the agricultural products were higher than the surrounding temperature.
(3) When the agricultural products were heated, the increasing of sample temperature were different according to the radiated wave length of far infrared rays.
It were available for the drying of agricultural products to use the far-infrared rays which has a high heating efficiency.