Thermal Diffusivity, Moisture Diffusivity, and Color Change of Codonopsis javanica with the Support of the Ultrasound for Drying

Table 2

The drying time of Codonopsis javanica with and without the ultrasound.

Cases	Ultrasound intensity, Iu (kW/m^2)	Air temperature, ta (°C)	Drying time, τ (s)	The reduced drying time, ∆τ (%)
1	0	40	23900	—
2	1.3		19000	20
3	1.7		16700	30
4	2.2		14000	41
5	0	45	21900	—
6	1.3		16500	25
7	1.8		13800	37
8	2.2		12100	45
9	0	50	16700	—
10	1.3		12900	23
11	1.8		12600	24
12	2.2		12000	28