Table 1.

Design specifications of the natural convection solar dryer.

Units	Specifications
Solar collector	Plywood, tilted 15.47°N, dimension: 0.79 m × 0.18 m x 0.16 m
Absorber	Black painted aluminium sheet, 0.79 m × 0.18 m x 0.002 m
Glazing	Transparent glass, dimension: 0.78 m × 0.18 m x 0.004 m
Drying Chamber	Plywood. Dimension: 0.66 m × 0.43 m x 0.43 m
Drying trays	Hardwood skeleton, plastic wire mesh, dimension: 0.30 m × 0.35 m,
Chimney	Plywood, 0.15 m high
Copper tubing	φ 15.8 mm