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Converting Waste Agricultural Biomass into a Resource - UNEP

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FD-50 Solar-<strong>Biomass</strong> Hybrid Cabinet Dryer 108<br />

Philippines, Research<br />

Crop<br />

Residue<br />

Process<br />

Equipment<br />

Main Product<br />

Coconut<br />

Coconut shell or charcoal<br />

Combustion<br />

Cabinet type solar-biomass hybrid dryer<br />

Heat for drying<br />

Cabinet type solar-biomass hybrid dryer using a solar collector during daytime<br />

operation, and a biomass stove for operation during cloudy weather<br />

conditions and at night.<br />

Detailed Process Description:<br />

This cabinet type dryer, referred to as Model FD-50, has three main<br />

components: solar collector, drying chamber, and biomass stove. The airheating<br />

solar collector is of flat plate type, and has an absorber area of 1.9<br />

m2.<br />

The drying chamber of has 30 aluminum wire net trays to hold the products.<br />

An exhaust fan powered by a 45 W electric motor fixed in the chimney of the<br />

drying chamber forces ambient air to pass through the collector. The air thus<br />

forced gets heated while passing through the collector, and rises up through<br />

the several trays on which the products being dried are spread in thin layers.<br />

The biomass gasifier stove assists drying whenever solar radiation is<br />

insufficient.<br />

108 http://www.serd.ait.ac.th/reric/<br />

243

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