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All Journal Jurnal Teknologi Rekayasa Mesin Prosiding Semnastek Menara Ilmu Industrial Engineering Journal (IEJ) Journal of Welding Technology Journal of Applied Sciences and Advanced Technology Jurnal Hurriah: Jurnal Evaluasi Pendidikan dan Penelitian Malikussaleh Journal of Mechanical Science Technology Jurnal Polimesin
Aljufri Aljufri
Universitas Malikussaleh
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Design of A Portable Solid-Fuel Rocket Stove Aljufri, Aljufri; Putra, Reza; Rahman, Abdul; Mardian, Rikki
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.153-160

Abstract

The depletion of fossil fuels is a hot topic of discussion these days. This is due to the increasing use of fossil fuels in human life. In terms of the increase in fuel and gas prices, we realise that the energy consumption that is increasing from year to year is not balanced with the availability of energy sources, which affects households that use fuel in the cooking process. So a design was carried out to make an ergonomic solid fuel stove with the aim of not using fuel anymore in the cooking process, in this design, the stove is designed to be more flexible and get a portable biomass rocket stove design by considering social aspects, performance, local resources, economy, environmentally friendly. Biomass fuels are solids, liquids or gases produced from organic matter.. Biomass fuels used in solid fuel stoves such as firewood, charcoal, briquettes and pellets. Each biomass fuel has different properties and characteristics. The designed portable rocket stove consists of several main parts namely combustion chamber, chimney, air duct, pan spot and cassing, using stainless steel material. The test results include combustion chamber and water temperature during the process, thermal efficiency, combustion rate and specific fuel consumption under cold start and hot start conditions. After hot start, it is found that the use of a chimney on a portable stove designed using coconut shell fuel is more effective than without a chimney. Shorter boiling time of 1 minute, greater combustion rate of 0.13 grams/minute, higher thermal efficiency of 2% and lower specific fuel consumption of 9.11 grams/litre of water when the stove uses a chimney.
Rancang Bangun Kompor Burner Menggunakan Bahan Bakar Oli Bekas Butar Butar, Iqbal Duarda; Yusuf, Muhammad; Nayan, Ahmad; Aljufri, Aljufri
Malikussaleh Journal of Mechanical Science and Technology Vol. 8 No. 2 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : E-Journal Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i2.18836

Abstract

Kompor merupakan salah satu teknologi yang berperan penting dalam penggunaan energi skala rumah tangga. Oli merupakan salah satu sisa produk minyak bumi yang memiliki dua macam oli bekas yaitu oli bekas industri dan oli hitam. Membuat kompor menggunakan oli bekas sebagai bahan bakar kompor. Pengujian kompor menggunakan metode water boiling test (WBT), yang merupakan pengujian Fuel Consumtion Rate (FCR) yaitu pengujian untuk mengetahui perbandingan jumlah bahan bakar yang dipakai dengan waktu yang telah ditentukan yang didapat hasil 0,526 kg/jam, dan panas spesifik pada nozle yang digunakan ialah 0.470 J/g-°C. Karakteristik nyala api pada kompor memiliki warna biru setelah kompor dinyalakan dan dilakukan pemanasan selama kurang lebih 5  menit.
Fabrikasi dan Analisis Kekuatan Impak Safety Helmet dari Material Komposit Berpenguat Serat Bambu Mengunakan Resin Epoxy Subahgia, Jeroh Miko; Abubakar, Abubakar; Amani, Yasir; Aljufri, Aljufri; Rahman, Abduk
Malikussaleh Journal of Mechanical Science and Technology Vol. 8 No. 2 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : E-Journal Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i2.17418

Abstract

Safety Helmet adalah salah satu jenis alat pelindung diri (APD) yang dikenakan di kepala dan biasanya terbuat dari logam atau bahan keras lainnya seperti Kevlar, serat resin, atau plastik. Berkenaan dengan penggunaan APD sebagai upaya perlindungan tenaga kerja, untuk mengindari faktor yang berpotensi membahayakan pekerja seperti: kecelakaan kerja, terpeleset dan terjatuh. untuk itu perlunya dilakukan tindakan seperti pelatihan, pembuatan work instruction (WI), standard operating procedure (SOP) sebagai upaya terakhir untuk menghindari kecelakaan kerja. Seiring dengan pesatnya kemajuan teknologi dibidang material membuat perkembangan material berpenguat serat alam (natural fiber) yang melimpah dan ramah lingkungan bisa menjadi opsi untuk menggantikan material plastik, logam maupun keramik. Bambu juga memiliki serat yang berpotensi untuk dikembangkan menjadi bahan biokomposit dalam dunia industri, khususnya pada helm pelindung (safety helmet) dikarenakan mudah didapat dan ramah lingkungan. Pemilihan serat bambu sebagai bahan penelitian dengan mempertimbangkan potensi serat bambu di Indonesia yang berlimpah dan belum termanfaatkan secara baik. Safety helmet di cetak menggunakan metode hand lay up. Uji impak komposit merujuk pada pengujian kekuatan dan ketahanan material komposit terhadap beban tiba-tiba atau benturan. Berdasarkan hasil penelitian yang dilakukan diperoleh kesimpulan sebagai berikut. nilai kekerasan spesimen dengan variasi fraksi volume 70% serat bambu memiliki nilai kekerasan rata-rata tertinggi sebesar  dan variasi fraksi volume 50% serat bambu memiliki nilai kekerasan rata-rata terendah yaitu  yang memiliki selisih  dengan variasi fraksi volume 70% serat. Nilai harga impact tertinggi didapat pada fraksi volume serat bambu 70% dengan harga impact rata-rata , sedangkan harga impact komposit serat bambu terendah adalah pada fraksi volume serat bambu sebanyak 50% dengan harga impact .
Pengaruh Minyak Nabati Sebagai Pendingin Terhadap Temperatur dan Kekasaran Permukaan Baja ST 42 pada Proses Pembubutan Rangkuti, Mhd. Saleh; Aljufri, Aljufri; Rizki, Muhammad Nuzan; Rahman, Abdul; Muhammad, Muhammad
Malikussaleh Journal of Mechanical Science and Technology Vol. 8 No. 2 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : E-Journal Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i2.17669

Abstract

In the machining process, selecting the appropriate tool and coolant significantly affects the surface roughness of a product to be manufactured. The purpose of this research is to compare between soluble oil and vegetable oil as coolants in reducing roughness values and dissipating heat generated during the machining process of ST 42 steel. Carbide tools and vegetable oil coolants, namely cooking oil and castor oil, are used in this study, with soluble oil used as a reference. The machining process in this study employs conventional machining with a spindle speed of 1200 rpm, a cutting depth of 0.2 mm and 0.4 mm, and a cutting speed of 0.04 mm/minute. Temperature data collection during the machining process is carried out using a thermogun, and surface roughness testing is conducted using a Mitutoyo SJ-310 surface roughness tester. From the test results, the lowest roughness and temperature values are obtained at a cutting depth of 0.2 mm for all types of coolants used. The use of soluble oil yields the lowest average roughness and temperature values, which are 35.2 °C and 0.9 µm, respectively. Meanwhile, in the use of vegetable oil to minimize surface roughness, the lowest average value is found in cooking oil, which is 1.5 µm, and to minimize surface temperature during machining, castor oil coolant is the most effective, with a temperature of 40.1 °C.
Utilization of Waste Paper as Fiber for Motorcycle Fender Manufacturing Raw Materials Aljufri, Aljufri; Riskan, Ardi; Rizki, Muhammad Nuzan; Putra, Reza; Akmal, Syarifah
Jurnal Teknologi Vol 17, No 1 (2025): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.17.1.23-30

Abstract

The selection of paper as the main material for making composites in this study is driven by several considerations. HVS paper is produced by factories with the main raw material being wood. Besides, the use of HVS paper as a fiber for composites offers the potential to reduce industrial waste and reduce dependence on conventional raw materials. The purpose of this study was to determine the effect of variations in the volume fraction of HVS pulp fiber on the mechanical properties of the specimen surface and hardness test to determine the use of HVS pulp composites as raw material for making motorcycle fenders. The benefits of this research provide information for the manufacturing industry in developing innovative composite materials, offering sustainable alternatives that are environmentally friendly, increasing the use value of HVS paper processing, which has only been used as waste. From the results of the research conducted, the results obtained with the value: the hardness of the specimen with a volume fraction variation of 70% fiber has the highest average hardness value of 11.5 kg/mm2, and the variation of the volume fraction of 50% fiber has the lowest average hardness value of 8.6 kg/mm2, which has a difference of 2.9 kg/mm2 with a volume fraction variation of 70% fiber. The highest impact price value is obtained at a 70% pulp volume fraction with an average impact price of 0.0402 J/mm², while the lowest pulp composite impact price is at the volume fraction of 70% fiber. 50% pulp with an impact price of 0.0263 J/mm². The increase in hardness and impact resistance with increasing pulp volume explains that this composite can be an alternative material for application on motorcycle fenders.
Co-Authors Abdul Ali Chaniago Abdul Rahman Abdul Rahman Abubakar Abubakar Abubakar Dabet Adhiya Putra, M. Iqbal Adi Setiawan Aditya Kamanurandi Aditya Kamanurandi Ahmad Nayan Akmal, Syarifah Alchalil Alchalil Aris Abizar Azhari, Wafiq Butar Butar, Iqbal Duarda Dabet, Abubakar Edy Yusuf F Fahmi Indra Mawardi Irfansandi, Tomi K Khairina M Muhammad Mardian, Rikki Muhammad Muhammad Muhammad Rizqi Almuhtadee Muhammad Yusuf Muhammad, M Mutia, Sri Putra, Reza Rahman, Abduk Rambe, Farhan Wafi Rangkuti, Mhd. Saleh Ranu Firmansyah Revi Syarlian Reza Putra Reza Putra Riskan, Ardi Safriwardi, Ferry Subahgia, Jeroh Miko Suci Indah Sari Suryadi, S Syahputra, Amri Syamsiar, Syamsiar Syarifah Akmal Teuku Mudi Hafli Yasir Amani Zulfahmi Z Zulfahmi Zulfahmi Zulfahmi Zulfahmi