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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Journal of Applied Engineering and Technological Science (JAETS) Jurnal Abdi Insani Jurnal Rekayasa Energi dan Mekanika International Journal of Science and Society (IJSOC) Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal Pengabdian Pada Masyarakat Jurnal Polimesin Indonesian Journal of Humanities and Social Sciences
Selly Septianissa
Department Of Mechanical Engineering, Faculty Of Engineering, Widyatama University, Bandung 40125, Indonesia
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Investigation of Drying Time and Final Moisture Content of Arabica beans in a Solar Drying Chamber Ramdhani, Rendi; Septianissa, Selly; Rajani, Ahmad
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2239-2249

Abstract

Drying is a critical stage that affect directly the quality, storability, and market value of Arabica coffee beans. The objective of this study was to investigate the performance of a solar drying chamber integrated with a thermal collector and phase change material (PCM), operated under a constant airflow velocity of 9.2 m/s. Arabica beans of 1500 g were dried over two observation days, with chamber temperatures ranging from 40 °C to 46.5 °C and peak solar radiation of 1122 W/m². The results showed that the system effectively maintained thermal stability and drying performance despite fluctuations in solar input. The analysis revealed at Day 2 achieved a higher and faster moisture reduction due to improved solar conditions and absorber efficiency, with drying rates peaking at over 42 g vapor per hour in the third hour. In contrast, at Day 1 the drying rate peaked in the third hour at approximately 22.45 g vapor/h. Day 1 exhibited a more stable but slower drying trend. Overall, the system successfully reduced the beans’ moisture content to below 12.8% in within under 14 hours, with Tray 2 delivering the most consistent results. These findings demonstrate that the integration of solar thermal energy, PCM, and forced convection application significantly improved drying efficiency and reliability, offering a sustainable alternative for post-harvest processing, especially in regions with variable weather conditions.
Co-Authors Ahmad Rajani Ayu Zahra Chandrasari Hadining, Wanidya Ni’immallaili Hilman Mafazi Komarudin, Udin Martoni Nugraha, Suhud Prasetia, Adhita R Evi Sovia Rajani, Ahmad Ramdhani, Rendi Suryaman, Nia Nuraeni Trisnawan , Lukman Waldi, Muhamad Widantha, Komang Widhi Zanika, Sugih Yusuf