Experimental Study of a New Design of a Solar Dryer Assisted by Photovoltaic Cell

Abstract

This master's thesis presents an experimental investigation into the drying characteristics, kinetics modeling, and performance assessment of an innovative direct forced convection solar dryer integrated with photovoltaic power. The solar dryer was meticulously crafted within the confines of the Applied Research Unit in Renewable Energy, utilizing cost-effective materials, and synergized with a 10-watt photovoltaic panel. Operational conditions of the dryer are regulated by a sophisticated control system, synchronized with real-time meteorological data via an Arduino interface. The study conducts drying experiments on fresh mint, parsley, and henna samples. The objective is to reduce their initial moisture content from 83.55 % (w.b) for mint, 79.1 % (w.b) for parsley, and 65.84 % (w.b) for henna to the respective target moisture levels of 7.22 %, 6.48 %, and 3.73 % (w.b) within specific timeframes of 7h:34min for mint, 8h:40min for parsley, and 6h:28min for henna. Mathematical modeling of the drying process is performed, revealing that the Midilli-Kucuk model adeptly predicts the drying behavior of fresh mint, parsley, and henna samples. Furthermore, the control system, which dynamically adjusts drying temperatures based on real-time weather data, is rigorously tested and proven to be highly effective. This work contributes valuable insights into the practical implementation of solar drying systems powered by photovoltaic cells, offering a sustainable and energyefficient solution for preserving agricultural produce. The findings underscore the feasibility and efficiency of such integrated systems, paving the way for broader adoption in renewable energy-driven agricultural processes.