Comparative Analysis of the Thermal Efficiencies of a Three-Compartment Solar Dryer

Abstract

This study presents a comprehensive comparative analysis of the thermal efficiencies of a three-compartment solar dryer constructed with acrylic, glass, and polycarbonate materials. The research aimed to investigate the drying characteristics of yam, tomatoes, and plantain slices at varying thicknesses (5 mm, 10 mm, and 15 mm), the effect of pre-treatment on drying time, and the thermal efficiencies of the three different collector materials. A total of 27 drying experiments were conducted, with three replications for each combination of food sample, thickness, and compartment material. The results indicated that the polycarbonate compartment exhibited the highest average thermal efficiency (61.3%), followed by the acrylic (56.7%) and glass compartments (49.2%). Furthermore, the 5 mm thick slices demonstrated the shortest average drying time across all food samples, with a reduction of 38.5% compared to the 15 mm thick slices. Pre-treatment was found to decrease the drying time by an average of 21.2%. This study provides valuable insights for the development of efficient and cost-effective solar dryers, contributing to the broader context of sustainable agriculture and food processing practices.

Keywords:Acrylic, Glass, Polycarbonate, Thermal Efficiencies, Three-Compartment Solar Dryer

DOI: 10.7176/JNSR/14-8-02

Publication date:May 31^st 2023