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All Journal BULETIN FISIKA
Dewa Gede Eka Setiawan
Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Gorontalo, Gorontalo, Indonesia 96119
Astronomy Energy Materials Science & Nanotechnology Medicine & Pharmacology Physics

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Utilization of Thermoelectric Generators (TEG) to Convert Zinc Roof Heat into Electrical Energy Dintje Pahrudin; Asri Arbie; Dewa Gede Eka Setiawan; Muhammad Yunus; Septiana Kurniasari; Irsan Irsan
BULETIN FISIKA Vol. 26 No. 1 (2025): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2025.v26.i01.p06

Abstract

The increasing need for electrical energy due to technological growth requires using sustainable alternative energy sources. One potential energy source is solar energy, which can be converted into electricity through a thermoelectric generator (TEG). This study aims to design an optimal TEG configuration in converting heat from zinc roofs into electricity and to analyze the effect of variations in the shape of zinc roofs on the electrical power generated. The method used is an experiment with variations in the type of zinc roof, e.g. plate, wave, and box, and the TEG circuit configuration, e.g series and parallel. Measurements were made on the temperature, voltage, current, and electrical power generated, both with and without supercapacitors as energy storage. The results showed that zinc plates with a parallel configuration produced the highest electrical power of 0.01372 W, compared to zinc boxes and wave zinc. The parallel configuration proved to be more efficient than the series configuration. In addition, using supercapacitors also increases the electrical power generated and allows for greater energy storage.
Seismic Subduction Zone Modeling Based on Earthquake Data in Gorontalo and Surrounding Areas Moh. Ramdan Lipoeto; Dewa Gede Eka Setiawan; Icha Untari Meidji; Meilan Demulawa; Harsano Jayadi
BULETIN FISIKA Vol. 26 No. 1 (2025): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2025.v26.i01.p09

Abstract

The Gorontalo region is located in an active tectonic zone, so it has a high level of seismic activity. Understanding the geometry of the subduction zone in this region is important for assessing earthquake hazards and disaster mitigation efforts. This study models the angle and depth of subduction of the subduction plate beneath the surface of the Gorontalo region using earthquake data from the USGS catalog from 1994 to 2024. The analysis was carried out using the vertical section method (cross-section), which divides the study area into three segments, namely A, B, and C. Each segment was analyzed using polynomial regression to determine the subduction pattern. The results show that the megathrust zone is at a depth of < 50 km, while the Benioff zone reaches up to 300 km. The obtained subduction angles are 49.01°-59.09° in Segment A, 6.49°-71.76° in Segment B, and 19.87°-58.15° in Segment C. These results show variations in subduction geometry that reflect the tectonic complexity of the Gorontalo region.
Co-Authors Asri Arbie Dintje Pahrudin Harsano Jayadi Icha Untari Meidji Irsan Irsan Meilan Demulawa Moh. Ramdan Lipoeto Muhammad Yunus Septiana Kurniasari