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Majalah Ilmiah MOMENTUM
Published by Universitas Wahid Hasyim Semarang
ISSN : 24069329     EISSN : 24069329     DOI : -
Core Subject : Education,
Education
"MOMENTUM" adalah sebuah Jurnal Ilmiah yang dikelola oleh Fakultas Teknik Universitas Wahid Hasyim dengan ISSN cetak 0216-7395. Terbit setahun dua kali yaitu tiap bulan April dan Oktober. Lingkup bidang yang dapat dipublikasikan di jurnal ini adalah teknik mesin, teknik kimia dan teknik informatika
Arjuna Subject : -
Articles 4 Documents
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Search results for , issue "Vol 21 No 1 (2025): April" : 4 Documents clear
Pengaruh Kecepatan terhadap Efisiensi Energi dan Jarak Tempuh pada Sepeda Listrik dengan Baterai Lithium-Ion 18650 60V 15Ah Permata Aji, Dhimas Oki; Soolany, Christian; Azzizzah, Frida Amriyati
JURNAL ILMIAH MOMENTUM Vol 21 No 1 (2025): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v21i1.12317

Abstract

Sepeda listrik telah menjadi solusi mobilitas yang ramah lingkungan dengan baterai lithium-ion sebagai sumber daya utama. Namun, kinerja baterai ini sangat dipengaruhi oleh kecepatan berkendara, yang berdampak pada konsumsi energi dan jarak tempuh. Penelitian ini bertujuan untuk menganalisis pengaruh kecepatan terhadap efisiensi energi dan jarak tempuh pada sepeda listrik yang menggunakan baterai lithium-ion 18650 60V 15Ah. Dengan pendekatan analisis teoretis berbasis data eksperimen sebelumnya, penelitian ini menguji beberapa kecepatan konstan untuk mengevaluasi jarak tempuh dan konsumsi energi per kilometer. Pada kecepatan rendah (20 km/jam), baterai mampu menempuh jarak rata-rata 40 km dengan konsumsi energi sebesar 1,5 Wh/km. Di sisi lain, pada kecepatan sedang (30 km/jam), jarak tempuh menurun hingga 30 km dengan konsumsi energi sekitar 2 Wh/km, dan pada kecepatan tinggi (40 km/jam), jarak tempuh lebih jauh berkurang hingga 20 km dengan konsumsi 3 Wh/km. Hasil ini menunjukkan bahwa semakin tinggi kecepatan, semakin besar konsumsi energi per kilometer, yang mengurangi jarak tempuh secara signifikan. Kecepatan moderat dianjurkan untuk efisiensi energi optimal. Temuan ini diharapkan dapat membantu pengguna sepeda listrik dalam mengatur kecepatan guna memaksimalkan daya baterai dan memberikan wawasan bagi pengembangan kendaraan listrik yang lebih efisien.
PENGARUH PACK CARBURIZING ARANG ENCENG GONDOK TERHADAP LAJU KOROSI CAST IRON ALAT TURBOCHARGER Dera, Nurmala Santi; Indrawan , Indrawan Laria; Novriyanti , Novriyanti Talango; Sahional , Sahional Ishak
JURNAL ILMIAH MOMENTUM Vol 21 No 1 (2025): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v21i1.12668

Abstract

Corrosion resistance is a crucial factor in extending the service life of cast iron turbocharger components, particularly in corrosive environments. One effective approach to enhance corrosion resistance is through the pack carburizing process, which forms a protective carbon layer on the material’s surface. In this study, water hyacinth charcoal was utilized as an alternative carbon source due to its environmentally friendly and economical characteristics. The research aimed to evaluate the effect of varying pack carburizing durations on the corrosion resistance of cast iron turbochargers and to characterize the macrostructural changes on the surface resulting from the treatment. The methodology involved a pack carburizing process with holding times of 2, 4, and 6 hours at a controlled temperature, followed by electrochemical corrosion testing. Macrostructural characterization was also conducted to observe surface morphology changes due to carbon diffusion. The test results showed that the untreated specimen had a corrosion rate of 0.180 mm/y, which decreased to 0.120 mm/y after 2 hours of carburizing. A more significant reduction was observed in the 4-hour specimen, with a corrosion rate of 0.095 mm/y, representing a 47% decrease compared to the untreated sample. However, after 6 hours, the corrosion rate only slightly decreased to 0.090 mm/y, indicating that the carbon layer had reached saturation. Macrostructural observations confirmed the formation of a more homogeneous carbon layer in the 4-hour specimen, while the 6-hour specimen exhibited a thicker layer with diminishing protective effectiveness. This study demonstrates that pack carburizing using water hyacinth charcoal can significantly enhance the corrosion resistance of cast iron turbochargers, with an optimal treatment duration of 4 hours for maximum protection. Keywords: pack carburizing, water hyacinth charcoal, cast iron, corrosion resistance, mechanical properties
Numerical Investigation of The Effect of Fin Thickness on Straight Fin Heat Sink on Heat Transfer Performance Safi'i, Muhamad; Sinaga, Nazaruddin; Priangkoso, Tabah; Suheri, Suheri; Muhammad, Rouf
JURNAL ILMIAH MOMENTUM Vol 21 No 1 (2025): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v21i1.12682

Abstract

The heat load on computer chips during computing performance is the main topic, so a cooling device is needed. Heat sink is one of the tools commonly applied to reduce the heat load during computing performance of computer systems. Various heat sink configurations have been widely developed and studied to obtain designs with the best thermal performance. This research was conducted to investigate the best design on a straight fin heat sink (SFHS) that has the best thermal and hydraulic performance. SFHS with fin thickness variations of 1 mm, 2 mm, and 3 mm are proposed in this study. The numerical method was carried out using the Computational Flui Dynamics program by considering fluid flow velocities of 4 m/s, 6 m/s, 8 m/s and 10 m/s. The numerical results show that the cooling rate of SFHS can be increased by using SFHS with a thickness of 3 mm and a fluid flow velocity of 10 m/s with a maximum Nusselt number value of 59.74. Therefore, it is concluded that the SFHS has prospects for further study and can be applied practically in the field for micro electronic components and computer systems. Keywords: Heat sink, SFHS, Straight fin.
Comparative Study of Thermoelectric Generator Module Performance with Various Types of Plate Materials Pramanda, Wibi; Muhammad, Rouf; Joko Sumbogo, Yuliarto; Jiwo Satrio, Hutomo; Ramadhan Nur, Hamid; Maladzi, Radhi; Safi'i, muhamad; Nuruz Zaman, Mochamad
JURNAL ILMIAH MOMENTUM Vol 21 No 1 (2025): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v21i1.12692

Abstract

Advanced materials are used in thermoelectric generator (TEG) technology to turn heat into electricity using the Seebeck effect, which helps make better use of heat sources. The Seebeck effect is a result of the temperature disparity that exists between the two surfaces of the TEG. The configuration utilized in this investigation comprises several primary components, including the water block, thermoelectric, heat exchanger plate, and heater plate. The water block is positioned on the cold surface side of the thermoelectric to optimize the cooling process, while the heater plate is positioned on the surface side to facilitate the heating process. Initially, we position the heater plate to avoid direct contact between the heated surface side and the material plate. The plates consist of both copper and aluminum elements. This is done to facilitate the identification of the configuration systems, specifically TEG A (copper) and TEG B (aluminum). The research findings indicate that the TEG B configuration system, when subjected to a heating rate, yields superior voltage, current, and power outputs.

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