olar Dryers: These use solar energy to heat air, which then dries the copra. Solar dryers can be simple, like a greenhouse structure with good ventilation, or more advanced with enclosed systems and forced air.
Hot Air Dryers: These use heated air to dry the copra. The hot air is usually circulated through a drying chamber where the copra is spread out on trays or in a continuous flow system.
Fluidized Bed Dryers: In these dryers, hot air passes through a bed of copra particles, causing them to behave like a fluid. This method ensures even drying and can be more efficient but requires precise control of air flow and temperature.
Drum Dryers: These use a rotating drum with a heated surface to dry the copra. The copra is spread on the drum's surface and scraped off as it dries.
Indirect Dryers: These use a heat exchanger to transfer heat to the copra indirectly, often through a combination of air and radiant heat.