Converting Waste Agricultural Biomass into a Resource - UNEP

Drying chamber
The drying chamber contains three shelves and air ducts, which introduce hot
air from the solar collector and the biomass furnace into the chamber at
several levels. A chimney installed at the top of the chamber facilitates air
circulation through the chamber.
Biomass stove
The biomass gasifier stove design was adapted from a cross-draft gasifier
stove developed by AIT. The exhaust gas from the burner is channeled
through a shell and tube type heat exchanger, which heats up the drying air.
The optimal values of design parameters such as the plenum depth of the
solar collector, airflow rate, perforation pitch, and collector area were
established through experiments. All the materials used for the fabrication of
the dryer were readily available in the local
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