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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics JOURNAL OF SCIENCE AND SOCIAL RESEARCH Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya Journal of Technomaterial Physics International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Jurnal Ilmiah Ilmu Terapan Universitas Jambi EINSTEIN (E-JOURNAL)
Russell Ong
Universitas Islam Negeri Sumatera Utara, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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PENGARUH PENGGUNAAN SUMBER ENERGI POWER SUPPLY DAN PWM DC TERHADAP EFISIENSI REAKTOR HIDROGEN Siti Sulistiawati; Mulkan Iskandar Nasution; Russell Ong
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol. 8 No. 4 (2025): November 2025
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jssr.v8i4.4836

Abstract

Abstract: Hydrogen was chosen as an environmentally friendly alternative energy obtained through the water electrolysis process. In addition to being environmentally friendly, hydrogen also has a high level of electrical energy efficiency. This study aims to determine the effect of the use of electrical energy sources and frequency on the efficiency of a water electrolysis-based hydrogen reactor and to determine the use of energy sources in a hydrogen reactor as an optimal hydrogen producer. The water electrolysis process is influenced by factors such as voltage, current, power, and frequency given to the reactor. Tests were carried out with variations in voltage of 20V, 22V, 24V, 26V, 28V and 30V and frequencies of 23.69kHz, 24.87kHz, 25.64kHz, 26.31kHz, 26.73kHz. The parameters observed include voltage, current, power, H2 gas yield in ppm, temperature, and hydrogen production efficiency in %. The results of the study showed that the effect of using a frequency source was able to achieve a higher efficiency of 41% with an average current of 0.29A, an average power of 7.12 watts, with an average temperature of 30.150C, while the use of a Power Supply Amplifier (PSA) electrical energy source only produced an efficiency of 25%, with an average current of 0.38A, an average power of 9.81 watts, and an average temperature of 28.50C. The optimal value at the highest efficiency was obtained at an optimal frequency of 23.69 kHz with a temperature of 29.00C, a current of 0.20A, a power of 4.8 watts, and an efficiency of 51.57%. Keyword: Electrolysis, Hydrogen, Frequency, Power Supply, Efficiency Abstrak: Hidrogen dipilih sebagai energi alternatif ramah lingkungan yang diperoleh melalui proses elektrolisis air. Selain ramah lingkungan, hidrogen juga memiliki tingkat efisiensi energi listrik yang tinggi. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan sumber energi listrik dan frekuensi terhadap efisiensi reaktor hidrogen berbasis elektrolisis air dan untuk mengetahui penggunaan sumber energi pada reaktor hidrogen sebagai penghasil hidrogen yang optimal. Proses elektrolisis air dipengaruhi oleh faktor tegangan, arus, daya, serta frekuensi yang diberikan pada reaktor. Pengujian dilakukan dengan variasi tegangan 20V, 22V, 24V, 26V, 28V dan 30 V dan frekuensi pada 23,69kHz, 24,87kHz, 25,64kHz, 26,31kHz, 26,73kHz. Parameter yang diamati meliputi tegangan, arus, daya, hasil gas H2 dalam ppm, suhu, serta efisiensi produksi hidrogen dalam satuan %. Hasil penelitian menunjukkan bahwa pengaruh penggunaan sumber  frekuensi mampu mencapai efisiensi lebih tinggi yaitu sebesan 41% dengan arus rata-rata 0,29A, daya rata-rata 7,12watt, dengan suhu rata-rata 30,150C, Sedangkan pada penggunaan sumber energi listrik Power Supply Amplifier (PSA) hanya menghasilkan efisinesi sebesar 25%, dengan arus rata-rata 0,38A, daya rata-rata 9,81 watt, dan suhu rata-rata 28,50C. Nilai optimal pada efisiensi tertinggi diperoleh pada frekuensi optimal 23,69 kHz dengan suhu 29,00C, arus 0,20A, daya 4,8 watt, dan efisiensi 51,57%. Kata kunci: Elektrolisis, Hidrogen, Frekuensi, Power Supply, Efisiensi     
KARAKTERISTIK SEISMIK DAN VS30 LAPISAN TANAH MENGGUNAKAN METODE HVSR DI KECAMATAN PANCUR BATU DAN KECAMATAN TARUTUNG Ditya Afriliya Syanda; Abdul Halim Daulay; Russell Ong; Sugeng
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol. 9 No. 4 (2026): August 2026 (1)
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jssr.v9i4.7077

Abstract

Indonesia is a region with high seismic activity; therefore, subsurface soil characteristics need to be investigated to understand their response to earthquake waves. This study aims to determine the seismic characteristics of subsurface soils based on the dominant frequency (f₀), dominant period (T₀), amplification factor (A₀), seismic vulnerability index (Kg), and average shear-wave velocity to a depth of 30 meters (Vs30) in Pancur Batu District and Tarutung District using the Horizontal to Vertical Spectral Ratio (HVSR) method. Microtremor data were processed using Geopsy software to obtain the dominant frequency and amplification factor, while Vs30 was estimated through inversion using the Dinver module. The seismic vulnerability index was calculated using Kg = A₀/f₀, and site classification followed SNI 1726:2019. The results show that Pancur Batu has f₀ of 3.39854 Hz, T₀ of 0.29424 s, A₀ of 2.3885, Kg of 1.6786, and Vs30 of 455.70 m/s. Tarutung has f₀ of 2.33859 Hz, T₀ of 0.42761 s, A₀ of 3.09903, Kg of 4.1063, and Vs30 of 654.54 m/s. Both locations are classified as Site Class SC, although Tarutung exhibits a higher dynamic ground response due to differences in local geological conditions.
Co-Authors Abdul Halim Daulay Agustina, Akhiria Armansyah Armansyah Dinda Fadhilah Nur Azimmi Ditya Afriliya Syanda Hendriwansyah Putra Irda Nila Selvia Ishmah Ulya Kamarudin, Mohd Khairul Amri Lailatul Husna Lubis M. Idris Mashtura, Masthura Mulkan Iskandar Nasution Nova Aulia Rahma Nasution Rahayu, Siti Utari Ratni Sirait Ratni Sirait Ratni Sirait, Ratni Sagala, Junaina Sahputri Siti Sulistiawati Sugeng Sugeng Syahrul Humaidi, Syahrul Tua Raja Simbolon Widya Nazri Afrida Yuan Alfinsyah Sihombing