High Performance Oven for Coconut Shell Charcoal Drying Andreas Prasetyadi (a*), Wibowo Kusbandono (a)
a) Mechanical Engineering Department, Sanata Dharma University
Paingan, Maguwoharjo, Depok, Sleman, DIY, Indonesia
*pras[at]usd.ac.id
Abstract
Coconut shell charcoal briquetting usually applies thermal drying. LPG, CNG, and biomass are the common fuel for heating. Fuel price is significant for production cost in addition to raw material. An alternative approach for briquetting process using refrigerated drying was proposed. The research aimed to measure the oven performance applying refrigerated drying and its time for removing moist of the briquette. An experiment of drying 132 kg briquette was conducted in an oven of 197.5 cm x 100 cm x 112 cm dimension. The briquettes were cubes of 2.5 cm x 2.5 cm x 2.5 cm and had been aerated for 2 hours. The refrigerated drying machine has capacity of 715 W and the drying was performed in closed loop air method. It was recorded that the COP machine was 12.20 in average. The process needed 59 hours for drying.
