Condori and Saravia have proposed an analytical study of tunnel greenhouse dryer, which describes its drying performance [27]. The dryer is considered as a solar collector and there is a linear relationship between incident global radiation and the output temperature. The Dryer performance is calculated as a function of the drying potentials by the help of dryer characteristic functions. Cabbage and peas were dried in the three modes of drying open sun-drying, greenhouse dryer under natural convection and under force convection in the climate of New Delhi, India [15]. The convective mass transfer coefficient was calculated for all three modes of drying. At the initial stage of drying, the value of convective mass transfer coefficient is double in the force convection mode than in natural convection mode of the greenhouse dryer.