MENGHITUNG PERPINDAHAN KALOR PADA ALAT UJI PENGERING BIJI KAKAO DENGAN KAPASITAS 50KG

Abstract

Naturally drying process is necessary to dry the cocoa beans have some drawbacks such as long time, need some time reversal process, and depending on the weather. Therefore need to design a tool that cocoa beans drying oven for drying, but its function is not dependent on the weather. This drying oven has 3 main parts: a combustion chamber that uses LPG gas, the drying chamber is equipped spinning drying rack made of bamboo or rattan and disposal duct smoke or vapor fuel cocoa beans. Oven-making mechanism consists of the evaluation design, preparation tools and materials, construction tools in the workshop, and testing drying oven. Then, the test results show that the drying oven to dry cocoa beans with a capacity of 50kg require 32-hour drying time to spend 3 LPG gas cylinder 3kg size. Average temperature of the drying chamber at 50 ° C. And moisture content of dry beans can reach 7-10% advance of 55-70% which was originally wet