The grain drying system is a combination of components for the purpose of drying the grains to a safe or required moisture content. These components are usually an air moving device, a chamber to hold the grain and a source of heat. The grain drying system may be classified as solar drying systems, batch drying systems and continuous‐flow drying systems. Grains are dried in batches, in batch drying systems, and are moved from the drying chamber for further conditioning, storing or marketing. But in some cases the structures serve as drying chamber, and the grains are stored after drying in the structure. Energy and exergy analyses of the drying process are performed to find out the energy interactions and thermodynamic behaviour of drying air throughout a drying chamber.