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All Journal Jurnal Forum Nuklir Jurnal Sains Materi Indonesia Media Mesin: Majalah Teknik Mesin JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Jurnal Pemberdayaan Masyarakat Madani (JPMM) Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Eksakta : Berkala Ilmiah Bidang MIPA Journal of Renewable Energy and Mechanics Community Development Journal: Jurnal Pengabdian Masyarakat ARMATUR : Artikel Teknik Mesin dan Manufaktur Journal of Science and Science Education (JoSSEd) Journal of Engineering Science and Technology JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) BULETIN FISIKA
Ahmadi, Haerul
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Other

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Optimization of Thermoelectric Generator (TEG) Configuration for Burning Sugarcane Bagasse as an Alternative Energy Source Karim, Rahmiaty Abd.; Arbie, Asri; Yunus, Muhammad; Mursalin, Mursalin; Setiawan, Dewa Gede Eka; Ahmadi, Haerul
Journal of Science and Science Education Vol. 5 No. 2 (2024): October
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jossed.v5i2.9169

Abstract

Sugarcane bagasse is waste from the sugar industry which has the potential to be an efficient fuel for producing electricity by converting heat energy into electrical energy using a Thermoelectric Generator (TEG). TEG can be optimized to burn sugarcane bagasse as an alternative energy source in Indonesia. This research uses series and parallel configurations to test the optimal TEG configuration to increase energy conversion efficiency. The research results revealed that supercapacitors' parallel configuration produced the highest power in the 66th minute at 0.26 W. In comparison, the series configuration with supercapacitors produced 0.21 W of power in the 63rd minute. For the parallel configuration without supercapacitors, the energy produced reaches 0.20 W in the 69th minute, and the series configuration without supercapacitors produces 0.19 W in the 63rd minute. The parallel configuration shows more optimal performance than the series configuration, making it a promising solution in diversifying energy sources, especially in supporting efforts to utilize agricultural waste sustainably. Optimization of the thermoelectric generator configuration for burning sugarcane bagasse can be used as an alternative energy source.
Perancangan Perancangan Sistem Pengukuran Kapasitansi Crude Oil Menggunakan Interdigital Capasitors (IDCs) Berbasis Arduino Uno Rachmanita, Risse Entikaria; Ahmadi, Haerul
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 3 No. 2 (2019): JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) - November 2019
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v3i2.471

Abstract

Arduino UNO R3 is one of the cheapest and easiest microcontroller boards that has great potential to be used as a basis for the measurement system. This study aims to develop measurement system of crude oil capacitance by using IDCs(Interdigital Capacitors). By knowing the value of crude oil capacitance, the crude oil permittivity value can be calculated. The crude oil permittivity value data is extremely needed in making crude oil heating systems using microwaves. The study used IDC sprinted on a PCB board with a copper layer as the electrode. Then, the system measurement results were compared with the results of PM 6303 RCL meter Phillip type A frequency measurement of 1 kHz which was used as reference data to determine the extent of measurement errors. From the results obtained, it is known that the error value of the Arduino UNO R3 based capacitance repeatability measurement is 0.47%. While the results of the linearity test measurement of crude oil capacitance measurement of temperature increases using the Arduino Uno-based IDCs sensor, the R2 value is 0.87. Thus it can be seen that the Arduino UNO R3-based capacitance measuring device has quite good sensor characteristics.
Synthesis and Characterization of ZnO Semiconductor Nanoparticles with Annealing Temperature Variation for Dye Synthesized Solar Cell Application Supu, Idawati; Aulia Fitrah Ramadhani; Bunga Tang; Haerul Ahmadi; Dewa Gede Eka Setiawan
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 25 No. 03 (2024): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol25-iss03/467

Abstract

This study aims to make ZnO semiconductor nanoparticles using annealing temperature variations for dye synthesized solar cells, identify the structure and particle size and surface morphology using SEM-EDX and UV-VIS to determine the wavelength and absorbance values. In the gel-combustion method, three samples were made with varying annealing temperatures of 700⁰C, 800⁰C, and 900⁰C, respectively. The annealing temperature variation shows the difference in SEM test results, where the higher the annealing temperature, the smaller the particle size. EDX test results show that ZnO has been formed. In the UV-VIS characterization results for the three samples have different transmittance values and wavelengths from samples without dye, ZnO doping chlorophyll. Based on XRD data, the higher the calcination temperature, the smaller the particle size, and the distribution of particle size at each increase in annealing temperature. Based on the results of SEM analysis obtained that the particle size is getting smaller with increasing annealing temperature.  According to the UV-Vis analysis results obtained that the addition of chlorophyll extract does not have a significant effect about wavelength 370 nm on the transmittance value of each sample, so the best absorbance is owned by the ZnO doping dye sample.
PENGEMBANGAN ALAT DETEKSI DINI DALAM UPAYA PENINGKATAN KESIAPSIAGAAN WARGA DESA TOTOPO TERHADAP BENCANA BANJIR DAN TANAH LONGSOR Meidji, Icha Untari; Ahmadi, Haerul; Ninasafitri, Ninasafitri; Paputungan, Devi Triana; Akuba, Kisman R; Jayadi, Harsano
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2024): Volume 5 No 1 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i1.24708

Abstract

Desa Totopo merupakan salah satu desa terpencil di Kecamatan Bilato Provinsi Gorontalo yang sangat rentan terjadi multi bencana. Topografi Desa Totopo terdiri dari perbukitan dimana rumah warga berada pada lembahnya dan persis di samping rumah warga terdapat sungai besar yang sering menjadi penyebab banjir yang merendam rumah warga sekitar Desa Totopo. Hampir setiap tahun desa ini menjadi langganan bencana terutama bencana banjir dan tanah longsor. Oleh karena itu tujuan dari kegiatan ini adalah agar masyarakat Desa Topopo dapat mencegah ancaman, resiko dan dampak bencana sehingga Desa Totopo menjadi Desa tangguh terhadap bencana alam. Diharapkan pula Desa Totopo menjadi salah satu percontohan desa siaga bencana di Provinsi Gorontalo. Metode pengabdian yang dilakukan yaitu mengembangkan early warning system melalui perakitan dan pemasangan alat deteksi dini untuk banjir dan tanah longsor yang diharapkan mampu mengurangi resiko kerugian korban jiwa maupun harta jika terjadi bencana. Melalui kegiatan yang telah disebutkan, diharapkan Desa Totopo menjadi desa tangguh siaga bencana alam.
Analysis of the Hydrodynamic Characteristics of Limboto Lake Waters Based on Momentum Fluxes Khan, Mikail Gabriel Khan; Yunginger, Raghel Yunginger; Setiawan, Dewa Gede Eka; Jahja, Mohamad; Meidji, Icha Untari; Ahmadi, Haerul; Kusmayancu, Cucu; Nalle, Merpati Teodoris
BULETIN FISIKA Vol. 27 No. 1 (2026): 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.2026.v27.i01.p02

Abstract

The waters of Lake Limboto show a decline in water quality, characterized by a decrease in clarity. Environmental factors, such as wind speed and direction, play a significant role in influencing the dynamics and quality of lake waters. To understand the influence of wind on water conditions, a comprehensive hydrodynamic study is required. This study focuses on analyzing the hydrodynamic characteristics of Lake Limboto waters based on momentum flux and its implications for lake water conditions. Wind speed and direction measurements were conducted on seven ducks in Lake Limboto waters during the period of November 1-3, 2024. Data were collected in the morning, afternoon, and evening. The lake's hydrodynamic characteristics were determined using formulas from the measured data. Hydrodynamic characteristics were interpolated using IDW cross validation leave one out and optimized with rank and neighboring point parameters. Wind direction was interpolated using IDW and converted into a vector field using Vector Field Layer Manager. It was found that the momentum flux by wind in Lake Limboto waters has a value range of 0-0.05 N/m2, and cross validation produced an RMSE of 0.003-0.01 N/m2. The interaction of momentum flux from wind and river flow causes sediment to be deposited in the coastal area of ​​Lake Limboto.
Co-Authors Agus Probo Sutejo Akuba, Kisman R Andi Rosman N Asri Arbie Aulia Fitrah Ramadhani B. A. Tjipto Sujitno Bangun Pribadi Bunga Tang Dandi Arifian Dewa Gede Eka Setiawan Dewi Lanita Sari Harsano Jayadi Ihwanul Aziz Jahja, Mohamad Karim, Rahmiaty Abd. Khan, Mikail Gabriel Khan Kusmayancu, Cucu Latief, Muh. Fachrul Meidji, Icha Untari Moh. Yusuf Syafi'i Muh Fachrul Latief Muhammad Yunus Mursalin . Nalle, Merpati Teodoris Ninasafitri, Ninasafitri Paputungan, Devi Triana Rachmanita, Risse Entikaria Rachmanita, Risse Entikaria Risse Entikaria Rachmanita Rizky Abdul Aziz Sophie Hapsari Suprapto Suprapto Supu Idawati Supu, Idawati Tasih Mulyono Tasih Mulyono Tjipto Sujitno Yudithia Balo Tarigas Yunginger, Raghel Yunginger