Condori and Sarvavia have presented evaporation rate in two different types of forced convection greenhouse driers single chamber and double chamber [25]. For greenhouse dryer under active mode, there are two energy sources namely the air saturation deficit and the incident global solar radiation. There are two new concepts are proposed the generalized drying curve and dryer performance curve. The simulation results reveal that by improving the use of drying potentials, production rate of the dryer will improve. Experimentation was conducted on the pro-posed dryer to dry sweet pepper. Results reveal that double chamber greenhouse dryer is 87% more productive than single chamber for the same area.