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Topic

Technologies and technical equipment for agriculture and food industry

Volume

Volume 69 / No. 1 / 2023

Pages : 359-368

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DEVELOPMENT AND PERFORMANCE EVALUATION OF A LIQUEFIED PETROLEUM GAS-POWERED FLUIDIZED COFFEE ROASTER

PENGEMBANGAN DAN EVALUASI KINERJA PENYANGRAI KOPI FLUIDISASI BERTENAGA LIQUEFIED PETROLEUM GAS

DOI : https://doi.org/10.35633/inmateh-69-33

Authors

Dadang Dayat HIDAYAT

Research Centre for Appropriate Technology, National Research and Innovation Agency

Ari RAHAYUNINGTYAS

Research Centre for Appropriate Technology, National Research and Innovation Agency

(*) Diang SAGITA

Research Centre for Appropriate Technology, National Research and Innovation Agency

Maulana FURQON

Research Centre for Appropriate Technology, National Research and Innovation Agency

Arie SUDARYANTO

Research Centre for Appropriate Technology, National Research and Innovation Agency

Dadang GANDARA

Research Centre for Appropriate Technology, National Research and Innovation Agency

Taufik YUDHI

Research Centre for Appropriate Technology, National Research and Innovation Agency

Nandang JAENUDIN

Research Centre for Appropriate Technology, National Research and Innovation Agency

(*) Corresponding authors:

[email protected] |

Diang SAGITA

Abstract

In this study, a fluidized coffee roaster has been successfully designed, constructed, and tested. This prototype has a capacity of 500 grammes per batch to aid small-scale coffee shops in roasting coffee beans. This fluidized coffee roaster is easy to use, cheap and has an appropriate capacity for the small business requirements. The coffee roasting components of the machine consisted of a blower (600 watts), a heat exchanger, a jet burner, a cylindrical roasting chamber, a chaff and dust collector, and a frame. At a range of airflow of 4-6 m/sec, the average temperature increase in the furnace and roasting chamber was 26 °C and 7.8 °C per minute, respectively. Performance tests revealed that the developed fluidized coffee roaster had been able to roast Robusta and Arabica coffee to light, medium, and dark roasting levels. For Robusta coffee, the time required to achieve light, medium, and dark levels were 8.18, 9.85, and 12.03 minutes, respectively, with final roasting temperatures for each level of 209 °C, 220 °C, and 248°C. For Arabica coffee, the time required was 5.32, 7.67, and 11.72 minutes, respectively with the final roasting temperatures of 207 °C, 210 °C, and 218 °C.

Abstract in Indonesian

Dalam penelitian ini, fluidized coffee roaster telah berhasil dirancang, dibangun, dan diuji. Prototipe ini berkapasitas 500 gram per batch untuk membantu kedai kopi skala kecil dalam memanggang biji kopi. Penyangrai kopi terfluidisasi ini mudah digunakan, murah, dan memiliki kapasitas yang sesuai untuk kebutuhan usaha kecil. Komponen mesin sangrai kopi terdiri dari blower (600 watt), penukar panas, pembakar jet, ruang sangrai silinder, pengumpul kulit ari dan debu, dan rangka. Pada kisaran aliran udara 4-6 m/detik, kenaikan suhu rata-rata di dalam tungku dan ruang pemanggangan berturut-turut adalah 26 °C dan 7,8 °C per menit. Uji kinerja menunjukkan bahwa fluidized coffee roaster yang dikembangkan telah mampu menyangrai kopi Robusta dan Arabika hingga tingkat penyangraian ringan, sedang, dan gelap. Untuk kopi Robusta, waktu yang dibutuhkan untuk mencapai level light, medium, dan dark masing-masing adalah 8,18, 9,85, dan 12,03 menit, dengan suhu akhir penyangraian masing-masing level 209 °C, 220 °C, dan 248 °C. Untuk kopi arabika, waktu yang dibutuhkan masing-masing adalah 5,32, 7,67, dan 11,72 menit dengan suhu akhir penyangraian 207 °C, 210 °C, dan 218 °C.

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