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All Journal Transmisi Rekayasa Mesin Phi : Jurnal Pendidikan Fisika dan Terapan Prosiding Semnastek Jurnal SOLMA International Journal for Educational and Vocational Studies Mechonversio: Mechanical Engineering Journal Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Jurnal Hurriah: Jurnal Evaluasi Pendidikan dan Penelitian Malikussaleh Journal of Mechanical Science Technology Dinamis Mafaza : Jurnal Pengabdian Masyarakat Jurnal Pengabdian Masyarakat Bangsa Journal of Community Empowerment Jurnal Polimesin Jurnal Solusi Masyarakat Dikara
Alchalil Alchalil
Universitas Malikussaleh
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Effect of briquetting pressure on combustion properties of hydrothermally treated king grass biomass Alchalil, Alchalil; Setiawan, Adi; Dirga, Muhammad; Riskina, Shafira; Nurjannah, Siti; Hasibuan, Rizqon; Rahman, Abdul
Jurnal Polimesin Vol 23, No 4 (2025): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i4.7300

Abstract

The utilization of biomass as an alternative energy source continues to gain attention, particularly in the form of solid briquettes with properties comparable to coal. In Indonesia, the co-firing program in coal-fired power plants (PLTU) promotes the use of biomass briquettes as supplementary fuel. King grass (Pennisetum purpureum), a fast-growing, non-food crop that thrives on marginal land, is a promising candidate. However, its low energy density limits practical application. This study aims to enhance the fuel quality of king grass through hydrothermal treatment and evaluate the effect of varying briquetting pressures on briquette properties. Briquettes were produced without pressure and with compaction pressures of 100, 200, 300, 400, and 500 kg/cm². Results show that higher briquetting pressure reduced moisture content from 3.99% to 2.98% and friability from 54.46% to 11.95%. While ash content and volatile matter were minimally affected, fixed carbon increased to 28.42%, and calorific value peaked at 3,923 kcal/kg. Hydrothermal treatment further improved calorific value, reduced ash content, and enhanced fixed carbon levels. These findings demonstrate that the combination of hydrothermal treatment and briquetting pressure significantly improves king grass briquette quality, supporting their potential as a sustainable co-firing fuel in coal-fired power plants.
The Influence of Spindle Rotation Variation on The Wear of Carbide Cutting Tools Using a Gedee Weiler Lz-330 G Lathe Aljufri, Aljufri; Syahputra, Rio Mandala; Alchalil; Putra, Reza; Setiawan, Adi; Rahman, Abdul; Suryadi
Malikussaleh Journal of Mechanical Science and Technology Vol. 9 No. 2 (2025): Malikussaleh Journal of Mechanical Science and Technology (MJMST)
Publisher : E-Journal Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v9i2.25326

Abstract

This study was conducted to determine the effect of spindle speed on the wear rate of CNMG 120404 carbide cutting tools using a dry machining process without coolant. The specimens used were AISI 1045 steel shafts, The cutting tool used was a CNMG 120404 carbide with conditions assumed to be the same in each experiment. The machine used was a Gedee Weiler LZ-330 G lathe with fixed parameters of 0.2 mm/revolution feed and 0.4 mm cutting depth, as well as spindle speed variations of 450 rpm and 660 rpm. The cutting time was carried out in stages starting from 5, 10, 15, 20, to 25 seconds. In this study, the parameters observed included tool wear and the surface roughness of the turning results on the AISI 1045 specimen. Tool wear was measured using visual macro documentation, while surface roughness was tested with a surface roughness tester. The results showed that the lowest wear value occurred at 450 rpm with a cutting time of 5 seconds, amounting to 0.012 mm, while the highest wear was achieved at 660 rpm with a cutting time of 25 seconds, amounting to 0.036 mm. In terms of surface quality, the lowest roughness value was obtained at 450 rpm with a cutting time of 5 seconds, amounting to 2.43 µm, while the highest roughness occurred at 660 rpm with a cutting time of 25 seconds, amounting to 4.56 µm. This data shows that the higher the speed and the longer the cutting time, the greater the tool wear and the lower the surface quality due to friction and increased temperature in the cutting zone. Wear on carbide tools is more influenced by friction between the tool and the workpiece and the duration of cutting. The speed factor is not as dominant as the effects of friction and cutting duration.
Pelatihan Rancang Bangun PLTS Off Grid untuk Peningkatan Ekonomi Mikro Masyarakat Gampong Reuleut Barat Muhammad, Muhammad; Meliala, Selamat; Ezwarsyah, Ezwarsyah; Amri, Amri; Alchalil, Alchalil; Jannah, Misbahul
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.20862

Abstract

Background: Perkembangan energi terbarukan mendorong pemanfaatan Pembangkit Listrik Tenaga Surya (PLTS) off-grid sebagai alternatif sumber energi. Gampong Reuleut Barat, Kecamatan Muara Batu, membutuhkan program positif bagi pemuda untuk meningkatkan keterampilan sekaligus mendukung ekonomi mikro. Program ini bertujuan meningkatkan kompetensi pemuda dalam merancang dan membangun sistem PLTS off-grid sebagai backup PLN. Metode: Pelatihan dilaksanakan kepada pemuda Gampong Reuleut Barat melalui pemberian materi dasar PLTS, praktik merakit perangkat keras, dan evaluasi pemahaman dengan kuisioner. Kegiatan dilakukan secara partisipatif agar peserta aktif dalam setiap tahapan. Hasil: Peserta mampu merakit komponen PLTS secara bertahap sesuai materi pelatihan. Evaluasi kuisioner menunjukkan skor rata-rata pemahaman sebesar 66, menandakan peningkatan keterampilan teknis dan pemahaman konsep dasar. Kesimpulan: Pelatihan rancang bangun PLTS off-grid berhasil meningkatkan keterampilan pemuda desa sekaligus mendukung pengembangan ekonomi mikro berbasis energi terbarukan.
Co-Authors Abdul Rahman Abdul Rahman Absa, Munzir Abubakar Dabet Adi Setiawan Aditya Kamanurandi Aditya, Vikra Afrinanda, Cut Ahmad Nayan Akmal Akmal Akmal, Ajmir Aljufri Aljufri aljufri aljufri, aljufri Alkhaidir, Alkhaidir Amri Amri Andika Syahputra Aries, Muhlin Asnawi Audina, Nabillah Azis, Andy Br. Simajuntak, Ochitria Cintia Chatarina Umbul Wahyuni Dabet, Abubakar Dahrum, Dahrum Dirga, Muhammad Edi Rahman, Edi Ezwarsyah Ezwarsyah Fachry Abda El Rahman Fajriana Fatwa, Islami Fauzan, Saniar Hakim, Syahirman Halimatus Sakdiah Hayati, Masrura Heikal, Mohammad Henni Fitriani Herlina Herlina I. Irwansyah Irwansyah Irwansyah Iryana Muhammad Iryana Muhammad, Iryana Jumadil, Jumadil Karim, Firman M. Iqbal M. Satria Misbahul Jannah Mufti, Rijalul Muhammad Muhammad Daud Muhammad Fauzan Muhammad Habibi Muhammad Muhammad Muhammad Nuzan Rizki Muhammad Rizqi Almuhtadee Muhammad Sayuthi N. Nazaruddin Nasrah, Sayni Nasrah, Sayni Nasution, Ichsan Alwi Nuraida Nuraida Nuraini Fatmi Nuraini Fatmi, Nuraini Nurmalita Nurmalita Nurul Islami, Nurul Padang, Welly Liku Putra, Reza Rifanida Rifanida Riskina, Shafira Rizqon Hasibuan Rustam Efendi Safitri, Dinda Safriwardi, Ferri Satria, M. Selamat Meliala Shafira Riskina Simanjuntak, Ochitria Cintia Br Siraj Siraj Siraj Siregar, Umar Ramadhan Siti Nurjannah Supia, Dede Irawan Suryadi Suryadi Suryadi Syahputra, Azhar Syahputra, Rio Mandala T Taufik Tando, Arjal Taufiq Taufiq Taufiq Taufiq Yasir Amani Z Zulfahmi Zahara, Eva Zulfahmi Z Zulfahmi Zulfahmi