Drying of mint leaves in forced convection solar dryer

Abstract

In this present work, performance study on drying mint leaves under the metrological conditions. Intensity of radiation falls on the absorber plate which transfers heat to forced air flow inside the GI tube. Drying experiment carried out with 1kg of mint leaves taken for drying process under the different mass flow rate of 0.75 m/s and 1.25m/s in serpentine flow of air. Performance of the collector and drying efficiency were 30.33 % and 1.63% in first day at 0.75 m/s mass flow rate and in the second day collector, the drying efficiency were 29.41% and 1.89 % at the mass flow rate of 1.25m/s. The mass flow rate of air decreased with increasing collector and drying efficiency.