This project is the design and construction of roasted coffee beans with natural gas (LPG), which aims to design and build a small coffee roasting. And the performance of small roasters. Coffee beans used in the experiment were bred Arabica. Through the process of shell color and size separation of grains. You can roast coffee beans at a time no more than 1 kg of roasted coffee bean roaster 1 small popcorn using natural gas (LPG. ) As fuel for heating The machine has a width of 37x36x56 cm and can roast coffee beans at a time no more than 1000 grams of roasted first time bin roasted diameter in 30 cm outer 32 centimeters long, 30 centimeters, the speed of rotation of the drum roaster 25. rPM, temperature roasting up to 200 degrees Celsius tray room coffee upstairs, diameter 37 cm, height 10 cm base tray in size 37x40x10 cm main function of the machine from the gas chambers, the temperatures heat up. the tank as the tank is rotated by a motor-driven. When the temperature is hot enough to emit into the tank roasted coffee beans. Heat is transferred from the tank to the coffee beans. Cause roasters, who made it a performance machine using beans of 500 g to 1000 g increments of 100 grams respectively,
results demonstrated that the duration of the roasted coffee beans of 500 g make a light roast. it takes, on average, approximately 15 minutes of roasting medium used, on average, approximately 20 minutes to roast for 25 minutes until the coffee beans roasted in volume, 1000 g of roasted mild take on average. approximately 15 minutes to 30 minutes to roast, medium roast to spend, on average, approximately 50 minutes from where it can be seen that the trial would take a similar light roast. Until the time comes to pop the popcorn, it takes up about 5 minutes per 100 grams and the amount of time it takes to roast a roast, up 5 minutes per 100 grams.
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