Modification of Indirect Solar Dryer for Simplicia Production

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...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2018-03, Vol.120 (1), p.12026
Main Authors: Purnomo, C W, Indarti, S
Format: Article
Language:English
Subjects:
Air flow
Convection
Depletion
Drying
Forced convection
Herbal medicine
Mechanical ventilation
Solar collectors
Solar dryers
Solar energy
Spinach
Wind
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Summary: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).
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/120/1/012026