Yulianto, Fajar Tri (2026) Analisis Kecepatan Putaran Tabung Mesin Roasting Kopi dengan Sistem Pemanas Gas LPG 3 kg terhadap Pemerataan Hasil Penyangraian Biji Kopi. Undergraduate thesis, Universitas Muhammadiyah Surabaya.
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Abstract
Dalam proses pengolahan kopi, tahap roasting atau penyangraian memiliki peranan yang sangat krusial dalam menentukan mutu akhir produk. Dari hasil wawancara dengan penyangrai kopi (roaster) masih sering ditemukan ketidakteraturan tingkat kematangan biji kopi, seperti sebagian biji mengalami over-roasted (gosong) dan sebagian lainnya under-roasted (kurang matang). Hal ini diduga dipengaruhi oleh variasi kecepatan putar drum yang berpengaruh terhadap pola perpindahan panas, lama kontak biji dengan permukaan drum, serta sirkulasi panas di dalam ruang sangrai.
Penelitian ini menggunakan metode eksperimen, yaitu dengan melakukan pengujian secara langsung pada mesin roasting kopi melalui variasi kecepatan putaran drum. Pendekatan yang digunakan dalam penelitian ini adalah pendekatan kuantitatif, yang menekankan pada pengukuran dan analisis data secara numerik. Metode ini dilakukan melalui serangkaian pengujian langsung pada mesin roasting kopi, disertai dengan pengambilan data terhadap beberapa parameter penting. Parameter yang diamati meliputi kecepatan putaran tabung, temperatur, tekanan gas LPG dan waktu roasting.
Hasil penelitian menunjukan bahwa kecepatan putaran tabung mesin roasting kopi mempengaruhi tingkat keseragaman kopi dan waktu fase perubahan kopi pada saat penggorengan. Semakin lama waktu roasting yang dilalui pada fase development, maka warna kopi yang dihasilkan akan semakin seragam.
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In the coffee processing industry, the roasting stage plays a crucial role in determining the final quality of the product. Based on interviews with coffee roasters, inconsistencies in the roasting level of coffee beans are still frequently encountered, where some beans become over-roasted (burnt) while others remain under- roasted (insufficiently roasted). This condition is presumed to be influenced by variations in drum rotation speed, which affect heat transfer patterns, the duration of bean contact with the drum surface, and heat circulation within the roasting chamber. This study employed an experimental method, conducting direct tests on a coffee roasting machine with different drum rotation speeds. A quantitative approach was used, emphasizing numerical measurement and data analysis. The research was carried out through a series of experiments on the coffee roasting machine, accompanied by data collection on several important parameters. The observed parameters included drum rotation speed, temperature, LPG gas pressure, and roasting time. The results showed that the drum rotation speed of the coffee roasting machine affects both the uniformity of roasted coffee beans and the duration of the coffee transformation phases during roasting. The longer the roasting process remains in the development phase, the more uniform the color of the roasted coffee beans becomes.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Mesin roasting kopi, Kecepatan putaran tabung, pemerataan hasil penggorengan, Biji kopi, Coffee roasting machine, drum rotation speed, roasting uniformity, coffee beans. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures |
| Divisions: | 08. Fakultas Teknik > Teknik Mesin |
| Depositing User: | FAJAR TRI YULIANTO |
| Date Deposited: | 13 Jul 2026 00:52 |
| Last Modified: | 13 Jul 2026 00:52 |
| URI: | https://repository.um-surabaya.ac.id/id/eprint/12801 |
