Drying is one of the oldest food preservation techniques, which reduces water activity sufficiently and prevents the bacterial growth.But the major drawbacks of air drying are its energy inefficiency andthe long processing times. According to Mujumdar (1997), drying accounts for 10% of the overall energy consumption within the food industry (Mujumdar, 1997). Air temperature and velocity have been provenas the most important parameters affecting the rate of drying. An increase of air temperature and velocity results in higher heat and masstransfer coefficients, and subsequently in higher moisture transferrates. However, the increase of air velocity is normally limited and depends on each product's tolerance. The effect of air drying also diminishes during the falling rate period and exposure to extreme hightemperature may cause undesirable chemical and physical degradations such as shrinkage and browning. Moreover, an increase of the