Drying kinetics and characteristics of dried gambir leaves using solar heating and silica gel dessicant

TALENTA - Conference on Engineering, Science and Technology 2017

工业技术;自然科学

Hasibuan, R.^1 ; Hidayati, J.^2 ; Sundari, R.^3 ; Wicaksono, A.S.^1

Department of Chemical Engineering, University of Sumatera Utara, Indonesia^1

Department of Industrial Engineering, University of Sumatera Utara, Indonesia^2

Department of Mechanical Engineering, Mercu Buana University, Indonesia^3

关键词: Air velocities;    Drying chambers;    Drying characteristics;    Drying kinetic;    Drying operation;    Maximum levels;    Rotation speed;    Water molecule;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/309/1/012111/pdf
DOI  :  10.1088/1757-899X/309/1/012111

来源: IOP

【 摘 要 】

A drying combination of solar heating and silica gel dessicant has been applied to dry gambir leaves. The solar energy is captured by a collector to heat the air and the hot air is used to dry gambir leaves in a drying chamber. An exhaust fan in drying chamber assists to draw water molecules from gambir leaves accelerated by silica gel dessicant. This study has investigated the drying kinetics and drying characteristics of gambir leaves drying. In drying operation the air velocity is tuned by a PWM (pulse width modulation) controller to adjust minimum and maximum level, which is based on the rotation speed of the exhaust fan. The results show that the air velocity influenced the drying kinetics and drying characteristics of gambir leaves using solar-dessicant drying at 40 cm distance between exhaust fan and silica gel dessicant.