Open sun drying is a traditional method practiced widely in tropical climates for drying agricultural products. Considerable savings can be made with this type of drying since the source of energy is free and sustainable. However, this method of drying is extremely weather dependent and has the problems of contamination, infestation, microbial attacks, etc., thus affecting the product quality. Additionally, the drying time required for a given commodity can be quite long and result in post-harvest losses. Solar drying of agricultural products in enclosed structures by natural convection is an attractive way of reducing post harvest losses and low quality of dried products associated with traditional sun-drying methods [1–5]. Several attempts at developing natural convection solar crop-dryers (both of the cabinet-type and the tunnel-type) have been investigated and experimented on, over the years, and are described in the literature [1,6,7]. The natural convection solar cropdryers designs described include: direct, indirect and mixed-mode solar-dryers. Comparative studies [8,9] on these three dryer designs suggested that the performance of the mixedmode natural convection solar crop-dryer (MNCSCD) is potentially most effective and it appears to be particularly promising in tropical humid areas where climatic conditions favour sun drying of agricultural products. The MNCSCD, basically a cabinet-type of solar dryer with transparent cover, an attached solar air heater and natural airflow, has been considered favourable since such a dryer utilises solar energy directly, as well as the convective energy of the heated air.