Harmonizing Drying Time, Layer Thickness, and Drier Zones for Drying Kinetics: Quality and Safety of Solar Tunnel-Dried Wet-Processed Parchment Coffee (Coffea arabica L.)

Table 4

Effective diffusivity of the parchment coffee dried under different drying zones with different thicknesses.

Drier zones	Layer thickness	Diffusivity (m^2/s)
Open sun	2 cm	1.57-06
	4 cm	1.68-06
	6 cm	1.2-06
Zone 1	2 cm	2.8-06
	4 cm	2.51-06
	6 cm	2.15-06
Zone 2	2 cm	3.48-06
	4 cm	4.12-06
	6 cm	1.98-06
Zone 3	2 cm	5.03-06
	4 cm	2.44-06
	6 cm	1.89-06