Aryanto, Muhammad Nuur Ihsan (2026) Rancang Bangun Oven Pengeringan Bunga Rosella (Hibiscus Sabdariffa L.) Berbasis Pemanasan Udara Menggunakan Komponen Elektronik Positive Temperature Coefficient. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proses pascapanen pada bunga rosella (hibiscus sabdariffa L.) dibutuhkan penanganan untuk diolah menjadi produk ekonomis. Salah satu penanganannya yaitu, pengeringan pada kelopak bunga rosella dengan pemanasan udara yang dapat menyusutkan kadar air dari bunga rosella. Oven pengering konvensional umumnya tidak dilengkapi dengan pemantauan massa secara langsung, sehingga harus dilakukan secara manual yang dapat mengganggu stabilitas termal dan menurunkan efisiensi energi. Penelitian ini bertujuan untuk merancang dan membangun sistem oven pengering bunga rosella berbasis mikrokontroler ESP32 dengan mengintegrasikan elemen Positive Temperature Coefficient (PTC) Air Heater sebagai sumber panas efisien dan sensor Load Cell sebagai pemantau penyusutan massa secara real-time dalam sistem kontrol loop tertutup (closed-loop). Karakteristik pengendalian suhu ruang oven diatur menggunakan algoritma On-Off dengan batasan histeresis rentang 47°C hingga 50°C. Pengujian fungsional akhir diterapkan pada proses pengeringan fase layu (withering) terhadap sampel kelopak bunga rosella segar dengan massa awal 202,8 gram. Selama durasi pengoperasian 390 menit (6,5 jam), sistem berhasil merekam laju penurunan massa secara konstan hingga mencapai bobot akhir sebesar 63 gram, atau setara dengan persentase total penyusutan massa air sebesar 51,71%. Angka ini telah memenuhi standar parameter kadar air pengeringan layu material hayati tanpa memicu degradasi termal. Hasil penelitian ini menyimpulkan bahwa purwarupa oven pengering berbasis PTC dan ESP32 ini memiliki kinerja yang andal, presisi, dan sangat efektif untuk otomatisasi pengeringan mandiri yang aman tanpa memerlukan intervensi pengukuran manual.
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Post-harvest processing of Rosella (Hibiscus sabdariffa L.) flowers requires proper handling to transform them into economically viable products. One such treatment involves drying the Rosella petals using hot air heating to reduce their moisture content. Conventional drying ovens generally lack integrated real-time mass monitoring, necessitating manual measurements that can compromise thermal stability and decrease energy efficiency. This study aims to design and construct an ESP32 microcontroller-based Rosella drying oven system by integrating a Positive Temperature Coefficient (PTC) air heater as an efficient heat source and a load cell sensor for real-time mass reduction monitoring within a closed-loop control system. The oven chamber temperature is regulated using an On-Off algorithm with a hysteresis range of 47°C to 50°C. Final functional testing was applied to the withering phase drying process using fresh Rosella petal samples with an initial mass of 202.8 grams. During the 390-minute (6.5-hour) operation, the system successfully recorded a constant rate of mass reduction, reaching a final weight of 63 grams, equivalent to a total moisture mass reduction of 51.71%. This result meets the standard parameters for the withering of biological materials without triggering thermal degradation. This research concludes that the PTC and ESP32-based drying oven prototype demonstrates reliable and precise performance, proving highly effective for safe, automated drying without the need for manual measurement intervention.
| Item Type: | Thesis (Other) |
|---|---|
| Subjects: | Q Science > QC Physics > QC100.5 Measuring instruments (General) Q Science > QC Physics > QC271.8.C3 Calibration Q Science > QC Physics > QC271 Temperature measurements Q Science > QC Physics > QC320 Heat transfer Q Science > QC Physics > QC 611.97.T46 Temperature effects. Including transition temperature |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Nuur Ihsan Aryanto |
| Date Deposited: | 03 Aug 2026 03:10 |
| Last Modified: | 03 Aug 2026 03:10 |
| URI: | http://repository.its.ac.id/id/eprint/141952 |
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