Solar Dome Dryer-Based Smoked Fish Drying System for Rural Economy

Abstract

Abstract— The Solar Dryer is used as a drying system for fishery products or raw materials for ready-to-eat food within a "greenhouse" structure shaped like a "Dome Dryer." The dryer cover is made of clear polycarbonate, which effectively absorbs sunlight entering the drying chamber. Polycarbonate, a group of thermoplastic polymers, is easily moldable using heat. Its advantages include a density of

1.2–1.22 g/cm³, toughness retention up to 140°C, and stability down to -20°C. This material is highly transparent, capable of transmitting over 90% of light, similar to glass. Polycarbonate can also be designed to block ultraviolet radiation, providing 100% protection from harmful UV rays. It remains thermally stable up to 135°C, and its heat resistance can be further enhanced by adding flame retardants

without compromising its properties. Solar thermal radiation enters the drying chamber, where it is reflected and absorbed by the polycarbonate.  This results in heat transfer to the (wet) fish, leading to evaporation. The evaporation process creates a pressure

difference between the inside and outside of the drying chamber, causing water vapor to flow out through the ventilation holes.