Design consideration of smart solar dryer for precision drying

Abstract

A sensor based solar dryer was designed to control the drying environment for precision drying of agricultural produce. The system entirely used solar energy utilizing both thermal and electrical effect. Paraffin wax (PCM) was used for storage of thermal energy whereas solar battery was used to store the electrical energy. Hot air blower was also provided to supply heat when there is less or no solar radiation. Temperature sensors were provided to control the environment of drying chamber. The exhaust fan started operating depending on the set temperature and thus control the drying environment. Load cells were provided below each tray to measure the dry weight. The drying chamber was made of mild steel with glass wool insulation. The capacity of the designed dryer was 10-15 kg with 6 trays. The designed dryer has target temperature of 55-60oC.

Automated Temperatureand Humidity Control and Monitoring System for Improving the Performance in Drying System

“…This is a critical sort of incubator system since it is necessary to monitor the embryo's growth and development; hence control and monitoring of temperature values were crucial in this system. Devi and Kalnar [13] employed temperature sensors to manage the drying chamber's atmosphere. The exhaust fan began to run based on the chosen temperature, controlling the drying atmosphere.…”