Design and Manufacture of Portable Coffee Roaster with LPG Heater System

Dedi Suryadi; Satryo Ramadhani; Agus Suandi; Nurul Iman Suparrdi; Novalio Daratha

doi:10.30811/jpl.v21i1.2622

Design and Manufacture of Portable Coffee Roaster with LPG Heater System

Dedi Suryadi, Satryo Ramadhani, Agus Suandi, Nurul Iman Suparrdi, Novalio Daratha

Abstract

Bengkulu Province is one of Indonesia's top coffee producers. However, coffee processing is still done traditionally. Therefore, modern processing is required, particularly in the roasting process, which is vital in deciding the flavor of the coffee. This study aims to design, build, and test a low-energy coffee roaster with a capacity of 2 kg. The components of a coffee roaster are designed according to the demands and relevant standards, such as drum volume, drum material, shaft size, pulley size, belt, burner stove, and motor parameters. The coffee roaster is then tested by altering the distance between the fire holes to 10, 15, and 20 mm with a diameter of 3 mm, as well as varying the rotating speed of the drum to 60, 65, and 70 rpm and varying the coffee varieties, namely Robusta and Arabica. The testing of coffee roasting equipment with a capacity of 2 kg went smoothly. The results show that the ideal distance of the stove burner hole to attain 200 °C was discovered at a distance of 10 mm and a distance of the stove to the drum of 10 mm with a time of 17.24 minutes. For Robusta and Arabica coffee beans testing, the light roast should be roasted for 10 minutes. The medium roast requires 15 minutes of roasting time. And the dark roast requires a 20-minute roasting process. Furthermore, the rotating speed of the drum has little influence on the character of roasted coffee beans

Keywords

coffee beans; heating stoves; coffee roasting machines; mechanical design; roasting time

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References

. S. F. Sahat, N. Nuryartono, and M. P. Hutagaol, “Analisis Pengembangan Ekspor Kopi Di Indonesia,” J. Ekon. Dan Kebijak. Pembang., vol. 5, no. 1, pp. 63–89, 2018, doi: 10.29244/jekp.5.1.63-89.

. O. Sativa, Y. Yuwana, and B. Bonodikun, “Physical Characteristics of Fruit, Beans, and Powder of Coffee Harvested From Sindang Jati Village, Rejang Lebong District,” J. Agroindustri, vol. 4, no. 2, pp. 65–77, 2014, doi: 10.31186/j.agroind.4.2.65-77.

. A. Batubara, A. Widyasanti, and A. Yusuf, “Uji Kinerja dan Analisis Ekonomi Mesin Roasting Kopi (Studi Kasus di Taman Teknologi Pertanian Cikajang - Garut),” J. Teknotan, vol. 13, no. 1, p. 1, 2019, doi: 10.24198/jt.vol13n1.1.

. I. Sofi’, “Rancang bangun mesin penyangrai kopi dengan pengaduk berputar,” TekTan J. Ilm. Tek. Pertan., vol. 6, no. April, pp. 1–70, 2014.

. Sutarsi, S. Soekarno, and S. Widyotomo, “Performance Evaluation of Rotating Cylinder Type Coffee Bean Roaster,” J. Keteknikan Pertan., vol. 24, no. 1, pp. 33–38, 2010.

. Radi, B. Purwantana, R. P. Alamsyah, and H. D. Prawira, “Design of Portable Coffee Roaster for Home Industry,” IOP Conf. Ser. Earth Environ. Sci., vol. 327, no. 1, 2019, doi: 10.1088/1755-1315/327/1/012019.

. D. Suryadi, B. Anugrah, A. F. Suryono, A. Suandi, and N. Daratha, “Optimalisasi Dimensi Tabung Roasting Kopi Kapasitas 2 kg dengan Pendekatan Model Elemen Hingga,” Metal J. Sist. Mek. dan Termal, vol. 6, no. 1, p. 1, 2022, doi: 10.25077/metal.6.1.1-7.2022.

. J. W. Wibowo, A. Munawar, O. Mahendra, J. V. Josary, D. I. S. Ningrum, and B. Sejati, “A review of a smart Coffee Roaster: electronics, design, and artificial intelligence,” IOP Conference Series: Earth and Environmental Science, vol. 1116, 2011, doi: 10.1088/1755-1315/1116/1/012011.

. M. Omidi and M. Emami, “Experimental Investigation of Premixed Combustion and Thermal Efficiency in a Porous Heating Burner,” International Journal of Energy Research, vol. 45, no. 3, pp. 113–121, 2020, doi: 10.1002/er.5880.

. D. Prabowo, U. S. Jati, and W. Jaya, “Rancang Bangun Coffee Roaster Machine Kapasitas 1 Kg dengan Menggunakan Pengatur Suhu dan Waktu Termostat Rex-C 100,” Accurate J. Mech. Eng. Sci., vol. 1, no. 1, pp. 1–6, 2020, doi: 10.35970/accurate.v1i1.171.

. A. Fabbri, C. Cevoli, L. Alessandrini, S. Romani, “Numerical modeling of heat and mass transfer during coffee roasting process,” Journal Food Engineering, vol. 105 no. 2, pp. 264-269, 2011, doi: 10.1016/J.JFOODENG.2022.02.030.

. A. Majid, E. Abdullah, A. Diana, “A Review of Quality Coffee Roasting Degree Evaluation,” J. Appl. Sci. Agric., vol. 10, no. 7, pp. 18–23, 2015.

. A. Dharmawan, F. Cahyo, and S. Widyotomo, “Determining Optimum Point of Robusta Coffee Bean Roasting Process for Taste Consistency,” Pelita Perkeb. (a Coffee Cocoa Res. Journal), vol. 34, no. 1, pp. 59–65, 2018, doi:10.22302/iccri.jur.pelitaperkebunan.v34i1.30 .

. D. Hidayat, A. Sudaryanto, Y. R. Kurniawan, A. Indriati, and D. Sagita, “Development and Evaluation of Drum Coffee Roasting Machine for Small-Scale Enterprises,” INMATEH-Agricultural Engineering., vol. 60, no. I, p. 79-88, 2020, doi: 10.35633/inmateh-60-09.

. D. Harsch, P. Fischer, B. Berisha, “Considering Fluctuations of Material Properties, Stainless Steel 1.4301 on Manufacturability of Kitchen Sinks,” IOP Conference Series: Materials Science and Engineering., vol. 418, 2018, doi: 10.1088/1757-899X/418/1/012113.

DOI: http://dx.doi.org/10.30811/jpl.v21i1.2622