Thermal Efficiency of a Tea Leaf Parcher

Abstract

The heat flow and thermal efficiency of a tea leaf parcher were examined. The inputed heat for green tea leaves was calculated to be about 3,300kJ/kg for the cylinder pan, about 530kJ/kg for the fixed pan, of which 35.7% for the cylinder pan, 21.3% for the fixed pan was used as the heat of evaporation. The thermal efficiency of the cylinder pan increased slightly as the set temperature increased, but that of the fixed pan did not change under the range of experimental condition used. Thermal efficiencies were 36.7% for the cylinder pan, 16.4% for the fixed pan.