Pengaruh Exhaust Fan dalam Alat Pengering terhadap Penurunan Kadar Air dan Berat Bunga Rosela (Hibiscus Sabdariffa L.)

Atharina, Syaikha Syafira (2025) Pengaruh Exhaust Fan dalam Alat Pengering terhadap Penurunan Kadar Air dan Berat Bunga Rosela (Hibiscus Sabdariffa L.). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bunga rosela (Hibiscus sabdariffa L.) merupakan tanaman multiguna yang banyak dimanfaatkan sebagai bahan minuman herbal karena kandungan antioksidannya. Namun, proses pengeringan kelopak bunga rosela pascapanen yang masih bergantung pada sinar matahari membutuhkan waktu lama dan rentan terganggu oleh kondisi cuaca. Untuk mengatasi hal tersebut, penelitian ini bertujuan untuk mengetahui pengaruh suhu dan waktu pengeringan terhadap penurunan kadar air dan berat kelopak bunga rosela dengan menggunakan exhaust fan pada alat pengering. Pengujian dilakukan dengan menggunakan alat pengering yang dilengkapi sensor termokopel, soil moisture, dan load cell. Pada penelitian ini digunakan variasi suhu 50°C, 60°C, 70°C, dan 80°C serta waktu pengeringan 30, 60, 90, dan 120 menit. Data dikumpulkan secara real-time menggunakan software PLX-DAQ dan diolah menggunakan metode median atau nilai tengah setiap 60 data untuk mereduksi noise yang kemudian divisualisasikan dalam bentuk grafik. Hasil penelitian menunjukkan bahwa peningkatan suhu dan waktu pengeringan berpengaruh signifikan terhadap penurunan kadar air dan berat. Penggunaan exhaust fan terbukti meningkatkan efisiensi pengeringan dengan mempercepat pelepasan uap air dari ruang pengering. Kadar air terendah dicapai pada suhu 80°C selama 120 menit sebesar 3,23% dan penurunan berat paling signifikan sebesar 13,79 gram. Selain itu, suhu yang terdistribusi juga merata dalam alat pengering membantu meningkatkan efektivitas proses pengeringan. Sedangkan, penurunan kadar air tanpa penambahan exhaust fan berlangsung lebih lambat, yaitu 5,25% dengan berat sebesar 25,98 gram karena uap air tertahan di sekitar kelopak bunga rosela.
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Roselle flowers (Hibiscus sabdariffa L.) are a versatile plant widely used as an ingredient in herbal beverages due to their antioxidant content. However, the post-harvest drying process of roselle flower calyces, which still relies on sunlight, requires a long time and is susceptible to weather conditions. To address this issue, this study aims to investigate the effect of temperature and drying time on the reduction of moisture content and weight of roselle flower calyces using an exhaust fan in a drying device. The experiment was conducted using a drying apparatus equipped with a thermocouple, soil moisture sensor, and load cell. The study employed temperature variations of 50°C, 60°C, 70°C, and 80°C, and drying durations of 30, 60, 90, and 120 minutes. Data were collected in real-time using PLX-DAQ software and processed using the median method (the middle value of every 60 data points) to reduce noise, and subsequently visualized in the form of graphs. The results showed that increasing temperature and drying duration had a significant effect on the reduction of moisture content and weight. The use of an exhaust fan significantly improved drying efficiency by accelerating the release of water vapor from the drying chamber. The lowest moisture content was achieved at 80°C for 120 minutes, reaching 3.23%, while the most significant weight loss was 13.79 grams. Moreover, evenly distributed temperature within the drying device helped enhance the effectiveness of the drying process. In contrast, without the exhaust fan, the reduction in moisture content and weight occurred more slowly, with a moisture content of 5.25% and a final weight of 25.98 grams, due to water vapor being trapped around the roselle calyces.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Berat, Exhaust fan, Kadar air, Rosela. Wieght, Exhaust fan, Moisture content, Roselle.
Subjects:	Q Science > QC Physics > QC151 Fluid dynamics Q Science > QC Physics > QC271 Temperature measurements Q Science > QC Physics > QC320 Heat transfer
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Syaikha Syafira Atharina
Date Deposited:	15 Jul 2025 01:16
Last Modified:	15 Jul 2025 01:16
URI:	http://repository.its.ac.id/id/eprint/119718

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