Introduction

Post-harvest losses remain a major challenge in Uganda’s agricultural sector due to inefficient crop drying methods. Current solar dryers using single-phase change materials (PCMs) extend drying for only up to 7 hours after sunset, leaving a gap of 7–8 hours of potential drying time overnight. This project proposes the development of a cascaded packed-bed PCM LHTES unit capable of supplying energy for at least 11 hours, thereby enabling extended night drying. The innovation will enhance efficiency, reduce spoilage, and promote sustainable energy use in agriculture.