Hybrid-Solar-Dryer

Abstract: Post-harvest agricultural losses in developing regions often reach approximately 30% due to inadequate preservation facilities and the limitations of traditional open-air sun drying. This research presents the design and performance analysis of a hybrid solar dryer developed to provide continuous, high-efficiency drying regardless of weather conditions. The system integrates a flat-plate solar collector with an auxiliary biomass-fuelled gasifier heating unit, utilizing a 50-W photovoltaic panel to power fans for forced convection. Experimental results demonstrate that the hybrid system can achieve stable drying temperatures of up to 80°C with a thermal efficiency of approximately 35%. In performance trials, the dryer successfully reduced the moisture content of highly perishable produce—such as peaches and apples—from initial levels of ~89% to a safe storage level of 15–16% within 2 to 3 days. Furthermore, the integration of solar and biomass energy resulted in a 15% reduction in fuel consumption compared to biomass-only heating. This hybrid technology offers a sustainable, cost-effective, and hygienic solution for agricultural preservation, significantly improving product quality and shelf life in rural and industrial applications.

Keywords: Hybrid Solar Dryer, Biomass Heating, Post-Harvest Loss, Thermal Efficiency, Renewable Energy, Agricultural Preservation, Forced Convection, Moisture Content, Solar Thermal, Sustainable Agriculture, Food Security, Biomass Gasifier, Dehydration Technology, Rural Development.