PERANCANGAN MESIN ROASTER KOPI METODE THERMAL OIL JACKET

One of the processes in making coffee is the roasting process, this process is the processing of raw coffee beans into ripe coffee beans. Each roasting has a different way, both traditional and modern. As for the traditional method, from the process carried out the results of the maturity of the coffee beans are still uneven so that it is not as desired and the use of tools in the roasting process is less efficient. While the modern method, the tools used must be appropriate based on the characteristics so that if their use does not follow the rules, the results of the roasting carried out are not appropriate. From these problems, an efficient coffee bean roaster will be made to produce quality coffee beans. The working system of this tool uses the thermal oil jacket method to get an even maturity of the coffee beans and then this tool will work by rotating the coffee bean stirrer inside the roasting tube using an electric motor. Heating using a heater coil which then heats the oil, then hot oil is pumped around the drum with a semi-automatic control system based on the detected temperature sensor and will then control the heater to the desired temperature. This tool has 3 variants of coffee bean maturity, including light roast, medium roast, and dark roast