The Specific Energy Consumption of Robusta Coffee Bean Separating

Abstract

The aim of this research is to design and create the sorting machine within the engineering knowledge by using the three-layer sieve set cylindrical sorting machine under the various conditions of experimental. Furthermore, the Specific Energy Consumption [SEC] of Robusta coffee bean separates, the standard size of Robusta coffee bean, the total of product separated are regarded. For the experiment condition, rotation speed adjustable to 9.6 and 14.4 rpm. The raw material flow through to sieve and determination the standard size for calculating the [SEC]. The result of experiment found that the average of total of product separated was 165.1 kg/hr. and 164.7 kg/hr or 99.57% from that were passed the criteria of standard according to the ministry of agriculture cooperative. In order to the [SEC], the cylindrical sorting machine was 0.01631 MJ/kg at 14.4 rpm of rotation speed. However, the values of [SEC] may be change from the effect of rotation speed of sieve set.