Natural open sun drying is widely used in most tropical countries to dry agricultural produce as a means of reducing their moisture content to avoid microbial activities that might cause deterioration of the produce to prolong their shelf-life for use during the off-season since agriculture in most tropical countries like Ghana is rain fed. Apart from the dried product been contaminated with dust, microorganism, insect and dirt the process is weather dependent. Improved dry techniques using and concentrating solar radiation to elevate temperatures to achieve have proved to be a better...