Here, we study various energetic and exergetic performanceof the drying process through energy and exergy efficiencies
heat transfer effectiveness that are mathematically derived and presented above. The typical resultant thermodynamic efficiencies introduced as energy and exergy efficiencies versus mass flow rate of drying air are shown in Fig. 3a. The energy (first-law) efficiency of the process is defined as the ratio of the rate of energy transferred to the stream of products for drying divided by the total energy transferred from the stream of drying air (including the rate of heat losses). Likewise, the exergy (second-law) efficiency of the drying process is described as the ratio of the rate of exergy transferred to