Abstract
We calculated the amount of heat needed for the tea manufacturing process of Kamairi-cha. The amount of heat needed to produce 1 kg of Kamairi-cha crude tea was approximately 32,000 kJ in the manufacturing process: parching → tea rolling → secondary tea drying → final tea drying → tea drying; approximately 25,000 kJ in the manufacturing process: parching → tea rolling → secondary rolling, drying → final tea drying → tea drying; and approximately 26,000 kJ in the manufacturing process: parching → primary drying → tea rolling → secondary rolling, drying → final tea drying → tea drying, while for the Sen-cha crude tea, approximately 28,000 kJ was required. To increase the thermal efficiency of tea manufacturing process of Kamairi-cha, replacing secondary tea dryer with secondary tea rolling dryer gave an improvement. But, this method potentially led to the loss of characteristic flavor of Kamairi-cha. Thus, improving thermal efficiency of secondary tea dryer is greatly needed.
