Modification of Indirect Solar Dryer for Simplicia Production

2017 5th International Conference on Environment Pollution and Prevention

生态环境科学

Purnomo, C.W.^1,2 ; Indarti, S.^1,3

Agrotechnology Innovation Center (PIAT), Universitas Gadjah Mada, Berbah Sleman, Yogyakarta, Indonesia^1

Chemical Engineering Department, Univeristas Gadjah Mada, Jl Grafika no 2, Yogyakarta, Indonesia^2

Faculty of Agriculture, Universitas Gadjah Mada, Sleman, Yogyakarta, Indonesia^3

关键词: Drying behavior;    Drying chambers;    Drying constants;    Drying equipment;    Herbal medicines;    Moisture ratios;    Natural ingredients;    Thin layer drying;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/120/1/012026/pdf
DOI  :  10.1088/1755-1315/120/1/012026

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Simplicia is natural ingredient for herbal medicine that has been subjected to drying only. This study aims to develop an appropriate drying equipment to produce dried leaves of sambung nyawa (Gynura procumbens (Lour.) Merr.) or also called "longevity spinach". Typical indirect solar drier was modified to be able to process more fresh leaves in order to speed up the production. The modification was done using double solar collector and wind powered ventilation. The double solar collector was applied in order to collect more solar energy for larger dimension of drying chamber, while the wind-ventilator was installed to provide forced convection of hot air flow inside the dryer. The drying kinetic including the drying constants were investigated using three common thin layer drying equations to model the drying behavior of the leaves. The moisture ratio (MR) depletion with respect to the drying time (t) of the leaves can be well represented by equation of MR=1.1732exp(-0.0993.t)-0.1732exp(-17.3871.t).