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All Journal AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi
Supriyadi
Universitas Trisakti
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Social Sciences

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The Effect of Heat Flux on the Frequency of Bubble Appearance in a Boiling Pool Muhammad Hasan; Supriyadi; Larasati Rizky Putri; Sofia Debi Puspa; Sentot Novianto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.4812

Abstract

This research was conducted to determine the effect of heat flux on the frequency of bubbles appearing in boiling ponds. All fluid movement in pool boiling is caused by natural convection currents. The boiling pool consists of four areas of the pool boiling regime. The division of the four areas is based on the value of the heat flux and the difference between the surface temperature of the heater and the fluid. Using a two-phase heat transfer unit (H654 P.A. Hilton machine), The results showed that the power used greatly influences the boiling process, and besides that, the volume of water used also affects the duration of the boiling process. Based on tests using various power levels of 75 W, 110 W, 168 W, 237.5 W, and 290 W. The occurrence of bubbles will be faster and more numerous when using a lower volume of water and greater power. The heat transfer will be greater if a bubble appears, where latent heat plays a very important role. With mathematical analysis, an increase of 1 bubble per minute occurs for every increase in heat flux of 1.3 W/m2.
Study Characteristic Thermal Electric Generator (TEG) Type SP1848 27145 SA Sofia Debi Puspa; I Putu Budi Dharma; Sentot Novianto; Supriyadi; M. Alfian Gibran
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5561

Abstract

The TEG component, which operates on the Seebeck principle like a thermocouple, is widely used in the market, with TEG SP1848 27145 SA being one of the most common types. However, experiments must be conducted to determine its Seebeck coefficient, voltage, and power output when used with different heat and cold sources. This research aims to observe how the Seebeck coefficient, voltage, and power output of TEG SP1848 27145 SA change with variations in system temperature. To experiment, TEG SP1848 27145 SA is tested with a heater, and water flow rates are varied for cooling. Furthermore, the correlation between output voltage and ΔT has been determined through statistical analysis. The experiment results showed that the voltage output ranged from 0.54–1.03 V at a heater temperature of 86°C and an ΔT system value of 70.5-75°C. The Seebeck value was between 1,551.7-2,998.5 µV, and the power output was 43.5-67.7 mW. Additionally, the statistical analysis found a significant correlation between the temperature variable and output voltage variable, with an adjusted r square value of 89.2% for zero water flow rate and increasing to 95.8% for maximum water flow rate.
The Effect of Heat Flux on the Frequency of Bubble Appearance in a Boiling Pool Muhammad Hasan; Supriyadi; Larasati Rizky Putri; Sofia Debi Puspa; Sentot Novianto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.4812

Abstract

This research was conducted to determine the effect of heat flux on the frequency of bubbles appearing in boiling ponds. All fluid movement in pool boiling is caused by natural convection currents. The boiling pool consists of four areas of the pool boiling regime. The division of the four areas is based on the value of the heat flux and the difference between the surface temperature of the heater and the fluid. Using a two-phase heat transfer unit (H654 P.A. Hilton machine), The results showed that the power used greatly influences the boiling process, and besides that, the volume of water used also affects the duration of the boiling process. Based on tests using various power levels of 75 W, 110 W, 168 W, 237.5 W, and 290 W. The occurrence of bubbles will be faster and more numerous when using a lower volume of water and greater power. The heat transfer will be greater if a bubble appears, where latent heat plays a very important role. With mathematical analysis, an increase of 1 bubble per minute occurs for every increase in heat flux of 1.3 W/m2.
Study Characteristic Thermal Electric Generator (TEG) Type SP1848 27145 SA Sofia Debi Puspa; I Putu Budi Dharma; Sentot Novianto; Supriyadi; M. Alfian Gibran
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5561

Abstract

The TEG component, which operates on the Seebeck principle like a thermocouple, is widely used in the market, with TEG SP1848 27145 SA being one of the most common types. However, experiments must be conducted to determine its Seebeck coefficient, voltage, and power output when used with different heat and cold sources. This research aims to observe how the Seebeck coefficient, voltage, and power output of TEG SP1848 27145 SA change with variations in system temperature. To experiment, TEG SP1848 27145 SA is tested with a heater, and water flow rates are varied for cooling. Furthermore, the correlation between output voltage and ΔT has been determined through statistical analysis. The experiment results showed that the voltage output ranged from 0.54–1.03 V at a heater temperature of 86°C and an ΔT system value of 70.5-75°C. The Seebeck value was between 1,551.7-2,998.5 µV, and the power output was 43.5-67.7 mW. Additionally, the statistical analysis found a significant correlation between the temperature variable and output voltage variable, with an adjusted r square value of 89.2% for zero water flow rate and increasing to 95.8% for maximum water flow rate.
Inovasi Hijau: Daur Ulang Limbah Minyak Jelantah Menjadi Sabun Cair Organik di Lingkungan Pesantren Larasati Rizky Putri; Sentot Novianto; Supriyadi; Ika Wahyu Utami; Sally Cahyati; Sofia Debi Puspa; Harry Munandar; Kiyoshi Irisawa; Daniel
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 10 No 3 (2026): Agustus
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v10i3.28578

Abstract

Pengelolaan minyak jelantah di lingkungan pesantren masih menjadi tantangan, karena sebagian besar limbah tersebut dibuang langsung ke saluran air dan berpotensi mencemari lingkungan. Kegiatan Pengabdian kepada Masyarakat (PkM) ini bertujuan meningkatkan pengetahuan dan keterampilan santri serta pengelola Pesantren Daarul ’Uluum Lido Bogor dalam mendaur ulang minyak jelantah menjadi sabun cair organik yang ramah lingkungan dan bernilai ekonomi. Metode pelaksanaan dengan pendekatan partisipatif, meliputi sosialisasi, demonstrasi, serta praktik langsung pembuatan sabun cair organik. Evaluasi dilakukan melalui pre-test dan post-test untuk mengukur peningkatan pemahaman peserta, serta penyebaran kuesioner kepuasan. Hasil menunjukkan peningkatan signifikan pada nilai rata-rata post-test peserta, disertai partisipasi aktif dalam sesi praktik dan diskusi. Berdasarkan instrumen kuesioner evaluasi, 100% peserta sangat setuju bahwa kegiatan ini menambah pengetahuan tentang daur ulang minyak jelantah, 97% sangat setuju bahwa metode penyampaian menarik dan interaktif, serta 90% sangat setuju merasa termotivasi untuk menerapkan pengetahuan tersebut di lingkungan pesantren. Kegiatan ini terbukti efektif dalam meningkatkan kesadaran dan kemampuan peserta untuk mengolah limbah minyak jelantah menjadi produk bernilai guna. Secara keseluruhan, program ini berkontribusi dalam membangun budaya inovasi hijau dan dapat menjadi model pengembangan green pesantren yang mandiri dan berwawasan lingkungan.
Co-Authors Daniel Harry Munandar I Putu Budi Dharma Ika Wahyu Utami Kiyoshi Irisawa Larasati Rizky Putri M. Alfian Gibran Muhammad Hasan Sally Cahyati Sentot Novianto Sofia Debi Puspa