Rancang Bangun dan Analisis Kinerja Rumah Pengering Kopi Tipe Efek Rumah Kaca dengan Mekanisme Konveksi Paksa

Domi C. K. Dipa, Verdy A. Koehuan, dan Matheus M. Dwinanto

Abstrak

This study aims to design a coffee dryer house using ultra violet plastic (UV Solar Dryer) with a forced convection mechanism and to test the performance of the coffee dryer house. This research was conducted by designing the coffee bean drying house and testing the performance of the drying house. The design of the dryer house with a size of 5.5 x 2.9 x 1.9 meters uses a cover in the form of ultra violet plastic. Inside the dryer house there are three permanent racks with a size of 3.5 x 0.5 x 0.85 meters each. To speed up the drying process, equalize the temperature of the material and evaporate the material water, two exhaust fans are installed with a size of 0.35 x 0.22 x 0.395 meters. The performance test was carried out with three variations of air velocity at the exhaust fan, namely 0.5; 1.0; and 1.36 m/s. The important quantities analyzed are the drying rate of the material, the specific energy consumption and the efficiency of energy use. Technical analysis shows that the coffee dryer house is suitable for use in the coffee drying business. This is based on the drying efficiency value achieved in the test at 14.00 with an air velocity of 1.0 m/s which tends to be greater than the test with a speed of 1.36 m/s and 0.5 m/s at 11.00, 12.00, 13.00 and 15.00 with the highest efficiency value of 19.448%. Meanwhile, the highest value of specific energy consumption in the test at 12.00 with an air velocity of 0.5 m/s was 93824.19 kJ/kg