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Politeknik Negeri Sambas
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Rancang Bangun Alat Pengering Tenaga Surya (Solar Dryer) Portabel Berbentuk Prisma Segitiga Iklas Sanubary; Iman Syahrizal; Mizan Junaidi
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1213

Abstract

This research aims to design a solar dryer to increase drying room temperature. The drying room is designed in the shape of a triangular prism. The dried test material is Arabica coffee. The method used in this research is experimental by comparing the drying results in a solar dryer (inside) and traditional method (outside). Data collection was carried out for 3 days, starting at 09.00 WIB to 15.00 WIB with intervals every 1 hour. The data measured are the temperature inside and outside the solar dryer and the mass of the test material before and after drying. The results showed that the difference in the average temperature measured inside and outside the solar dryer on day 1 was 11.1 oC, on day 2 it was 11.6 oC and on day 3 it was 8.3 oC. The total mass reduction of the test material during 3 days of drying inside the solar dryer was 180.91 gram and outside the solar dryer was 164.03 gram. The average drying rate inside the solar dryer was 10 gram/hour while outside the solar dryer was 9.1 gram/hour. Based on these result, solar dryer can produce higher temperatures, greater mass reduction and higher drying rates than traditional methods
Kajian Eksperimental Pengering Kopi Hybrid dengan Sistem Kontrol Temperatur Berbasis Mikrokontroler Sanubary, Iklas; Santoso, Pande Putu Agus; Suhendra, Suhendra
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1605

Abstract

This study aims to determine the performance of a hybrid coffee dryer with a microcontroller-based temperature control system. The heating sources used are sunlight and electric heater. The type of coffee used is liberica. The research method used is experimental, with the independent variable being time and the dependent variables being temperature and mass. Data collection was carried out for 4 consecutive days, starting at 09.00 WIB to 15.00 WIB with a data collection interval of every 20 minutes. The data measured were the temperature inside and outside the drying room and the mass of coffee before and after the drying process. Data analysis was done based on graphs, determining the drying rate and testing the coffee moisture content. The results showed that the average temperature difference measured inside and outside the drying room for 4 consecutive days was 17.21 oC. The total reduction in coffee mass in the dryer for 4 consecutive days was 572 grams with an average drying rate of 23.83 grams/hour. The results of coffee moisture content testing showed that the hybrid coffee dryer reduced coffee moisture content from 56.01% to 8.79%.
Co-Authors Abdul Muid Azrul Azwar Boni Pahlanop Lapanporo Diah Mahmuda Iman Syahrizal Inasa, Yosafat Indra Kusumafikri, Dhea Gilang Mizan Junaidi Nurhasanah Nurhasanah pratama, rizal Santoso, Pande Putu Agus Suhendra Yogi Aprianto Yudha Arman