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All Journal Jurnal Energi Dan Manufaktur Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Sains Teknologi dan Lingkungan (JSTL) Journal of Electrical Engineering and Computer (JEECOM) IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Jurnal Karya Pengabdian Teknik Mesin Energy, Materials and Product Design
I.M. Mara
Universitas Mataram,
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health

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Penyuluhan Pencegahan Bahaya Kebakaran Penggunaan Kompor Gas LPG Rumah Tangga I Made Mara; I Gede Bawa Susana; Ida Bagus Alit; I G.A.K. Chatur Adhi W.A.; Made Wirawan
JURNAL KARYA PENGABDIAN Vol. 5 No. 1 (2023): April, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v5i1.146

Abstract

Rendahnya pemahaman tentang faktor penyebab terjadinya kebocoran gas LPG, kebakaran akibat gas yang bocor serta kualitas dan kondisi peralatan yang baik untuk menghindari bahaya kebakaran sangat diperlukan masyarakat. Solusi yang ditawarkan yaitu penyuluhan mencegah bahaya kebakaran kompor gas LPG rumah tangga. Kegiatan dilakukan di Banjar Gria Hita, Lingkungan Griya Pagutan Indah, Pagutan Barat, Mataram. Hasil kegiatan penyuluhan ini memberikan pemahaman kepada warga tentang komponen pada kompor gas yang dapat menimbulkan bahaya kebakaran. Hasilnya warga menjadi mengetahui dan memahami bahwa tata letak tabung gas yang tidak benar dapat memicu bahaya kebakaran. Selain itu, regulator gas harus selalu dalam kondisi baik sehingga aliran gas menjadi efisien dan mencegah terjadinya kebocoran gas.
Pelatihan Perawatan Kompor LPG Rumah Tangga untuk Pencegahan Bahaya Kebakaran I Gede Bawa Susana; I Made Mara; Ida Bagus Alit; I G.A.K Chatur Adhi W.A.; Made Wirawan
JURNAL KARYA PENGABDIAN Vol. 5 No. 2 (2023): Oktober, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v5i2.159

Abstract

Peningkatan pemahaman akan keselamatan bekerja khususnya dalam rumah tangga dalam pemakain kompor gas sangat dibutuhkan oleh masyarakat dalam upaya mencegah bahaya kebakaran. Kompor gas sebagai peralatan utama dan sangat dibutuhkan perlu perawatan rutin agar lebih efisien dan nyaman dalam beraktivitas. Salah satu kegiatan dilakukan di Banjar Gria Hita, Lingkungan Gria Pagutan Indah, Pagutan Barat, Mataram. Kegiatan dilakukan melalui pelatihan perawatan kompor gas rumah tangga untuk mencegah terjadinya bahaya kebakaran. Kegiatan pelatihan menghasilkan pemahaman warga akan pentingnya dan cara perawatan kompor gas yang mudah dan murah. Masyarakat menjadi paham dan tahu fungsi burner, selang gas, dan kebersihan badan kompor. Kompor gas yang selalu terjaga kebersihannya dapat meningkatkan efisiensi pemakaian gas, selain mencegah bahaya kebakaran.
PENGARUH PENAMBAHAN LIMBAH CAIRAN JAGUNG  TERHADAP KUALITAS DAN KUANTITAS BIOGAS  DARI KOTORAN SAPI  I Wayan Joniarta; Febrian Purnama; I Made Mara; I Kade Wiratama
Energy, Materials and Product Design Vol. 5 No. 1 (2026): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/empd.v5n1.331-337

Abstract

Biogas is one of the alternative energies that can be utilized to meet fuel energy needs. It originates from the fermentation process of biomass, such as cow dung. This research focuses on producing biogas from cow dung with the addition of corn waste water to determine the influence of adding corn waste water on the quality and quantity of the generated biogas. Treatments were applied by varying the composition of cow dung with corn waste water (A, B, C) and cow dung with water (D) as a control. The successive compositions created were composition A (1:1j), composition B (1:2j), composition C (1:3j), and composition D (1:1a), each repeated three times, and the study was conducted for 30 days. The research results indicate that with the addition of corn waste water, the highest quantity of biogas was obtained in composition A, amounting to 1168.08 cm3, while the lowest quantity was obtained in composition B, totaling 791.21 cm3. Regarding the quality testing of biogas with the addition of corn waste water, the highest quality was observed in composition A at 49.76%, whereas the lowest quality was found in composition B at 23%. However, in composition D, which consists of cow dung biogas with water demonstrated superior quality and quantity, with a quality value of 52.82% and a quantity of 1384.05 cm3. The data obtained suggest that corn waste water may not be as effective as a supplementary material for the mixture of cow dung biogas.
Production and Properties of Alternative Fuels from the Pyrolysis of Used Plastic Bags and Buckets Ida Bagus Alit; I Made Mara
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.15903

Abstract

This study aims to examine the properties of liquid fuel produced from the pyrolysis of two types of plastic waste: plastic buckets and plastic bags. The pyrolysis method is used to convert plastic waste into fuel oil (BBM) at high temperatures in the absence of oxygen. Experimental results show that 0.736 to 0.863 kg of fuel oil can be obtained from 1 kg of raw material. The color of the resulting fuel oil is influenced by the original color of the plastic material, indicating an effect of the chemical composition on the final product. Physical analysis shows that the density and kinematic viscosity of the fuel oil from plastic buckets are slightly lower than those of the fuel oil from plastic bags. However, both have values close to the characteristics of gasoline. The calorific value of the fuel oil from both types of plastic waste is still lower than that of gasoline and diesel, but sufficiently high for use as an alternative fuel. The ash and lead content in the pyrolysis fuel also remains below the maximum allowable limits for motor vehicle use. Thus, the fuel produced from plastic waste pyrolysis has the potential to be an environmentally friendly and sustainable alternative energy source.
Pengenalan dan Edukasi Postur Kerja Ergonomis pada Aktivitas Menggunakan Gerinda Tangan di Bengkel Mobil Listrik Jurusan Teknik Mesin Universitas Mataram I Gede Bawa Susana; I Gusti Agung Ketut Chatur Adhi Wirya Aryadi; I Wayan Joniarta; I Made Mara; I Ketut Perdana Putra
JURNAL KARYA PENGABDIAN TEKNIK MESIN Vol. 8 No. 1 (2026): April, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v8i1.241

Abstract

Kegiatan pengabdian kepada masyarakat ini dilaksanakan di Bengkel Mobil Listrik Jurusan Teknik Mesin Universitas Mataram dengan tujuan meningkatkan pemahaman dan keterampilan mahasiswa atau operator dalam menerapkan postur kerja ergonomis pada aktivitas penggunaan gerinda tangan. Permasalahan utama yang ditemukan adalah penggunaan postur jongkok atau setengah jongkok saat menggerinda akibat rendahnya posisi benda kerja, yang berpotensi meningkatkan risiko gangguan muskuloskeletal. Metode pelaksanaan kegiatan menggunakan pendekatan edukatif dan partisipatif yang meliputi tahap observasi awal, penyuluhan ergonomi, demonstrasi teknik postur kerja, serta pelatihan praktis. Hasil observasi awal menunjukkan bahwa postur jongkok ditandai dengan fleksi batang tubuh dan leher yang besar serta beban statis pada lutut dan pergelangan kaki. Setelah dilakukan edukasi dan penyesuaian fasilitas kerja sederhana, seperti pengaturan ketinggian benda kerja, peserta mampu beralih ke postur berdiri yang lebih alamiah dan ergonomis. Kegiatan ini menunjukkan bahwa intervensi ergonomi sederhana melalui edukasi dan pelatihan praktis efektif dalam meningkatkan kesadaran, kenyamanan, dan keselamatan kerja pada aktivitas menggerinda di lingkungan bengkel pendidikan.
Analisis Eksperimental Pengaruh Jenis Oli Terhadap Suhu dan Konsumsi Bahan Bakar Pada Sepeda Motor 4-Tak 125 cc Fakhmi Caesar Rahmadi; I Made Mara; Rudy Sutanto
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.237

Abstract

This study analyzes the effect of oil type on exhaust gas temperature and fuel consumption in a 125cc 4-stroke motorcycle. Three kinds of SAE 10W-40 oil were used: mineral, semi-synthetic, and full synthetic. Tests were conducted at idle with varying rpm and while cruising at varying speeds. Temperature was measured using a thermo gun, while fuel consumption was measured using a burette. Results showed that full synthetic oil produced the most stable temperature and lowest fuel consumption, while mineral oil demonstrated the highest temperature and consumption, especially at high rpm. This efficiency is attributed to the chemical characteristics and thermal stability of the full synthetic oil. This study provides a novel contribution by testing a classic air-cooled motorcycle under static and dynamic conditions, thus better reflecting real-world use.
Analisis Eksperimental Pengaruh Variasi Ketinggian Dome Piston terhadap Performa Mesin 4-Tak Esa Ramdhan Ardi Mahendra; I Made Mara; Rudy Sutanto
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.239

Abstract

Internal combustion engines remain the primary power source in transportation by converting fossil fuel energy into mechanical energy. This study examines the effect of piston dome height variations (1 mm, 3 mm, and 5 mm) on the performance of a 4-stroke 87.70 cc engine. A quantitative method was used with a rope brake dynamometer to measure torque, adequate power, fuel consumption, and SFCe, effective at engine speeds ranging from 2000 to 5000 rpm. The highest torque and power were recorded at 4000 rpm, the highest fuel consumption at 5000 rpm, and the highest SFCe at 2000 rpm for all dome height variations. As piston dome height increases, combustion chamber volume decreases, leading to lower compression ratios and reduced combustion efficiency. Therefore, piston design should be aligned with the intended focus on either efficiency or performance.
Energy Efficiency and Performance of PMSM Drives in Electric Vehicles under Variable Loads I Ketut Wiryajati; I Made Mara; I Chatur Adhi Wirya Aryadi; Ida Ayu Sri Adnyani
Journal of Electrical Engineering and Computer (JEECOM) Vol 8, No 2 (2026)
Publisher : Universitas Nurul Jadid

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33650/jeecom.v8i2.16859

Abstract

This study evaluates the performance and energy efficiency of an electric vehicle powertrain based on a Permanent Magnet Synchronous Motor under varying speed and load conditions using a real-time monitoring system. Experiments were conducted at speeds of 10–40 km/h and loads of 50–200 kg, measuring voltage, current, power, efficiency, and specific energy consumption. Results show that efficiency increases significantly from approximately 66% at low speeds to over 90% at higher speeds, while specific energy consumption decreases from 118 Wh/km to around 60 Wh/km, indicating improved energy utilization. Load variation has a relatively minor effect on efficiency but contributes to higher current and power demand. Efficiency gradient analysis reveals a reduced rate of improvement at higher speeds, suggesting saturation effects and the presence of an optimal operating region. Measurement validation confirms low error levels (<5%), ensuring data reliability. Overall, the system demonstrates optimal performance at medium to high speeds with significantly enhanced energy efficiency.
Pendampingan Penerapan Ergonomi melalui Pemindahan Toolbox dari Lantai ke Rak Kerja di Bengkel Mobil Listrik Teknik Mesin Universitas Mataram I Gede Bawa Susana; I Made Mara; I G.A.K. Chatur Adhi Wirya Aryadi; Rudy Sutanto; I Wayan Joniarta; I Ketut Perdana Putra
JURNAL KARYA PENGABDIAN TEKNIK MESIN Vol. 8 No. 2 (2026): Oktober, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v8i2.262

Abstract

Aktivitas pemindahan toolbox secara manual merupakan salah satu pekerjaan yang berpotensi menimbulkan risiko gangguan muskuloskeletal apabila dilakukan dengan teknik pengangkatan yang tidak ergonomis. Di Bengkel Mobil Listrik Teknik Mesin Universitas Mataram, toolbox yang sebelumnya berada di lantai dipindahkan ke rak kerja sebagai bagian dari penataan fasilitas laboratorium. Kegiatan pengabdian kepada masyarakat ini bertujuan memberikan pendampingan kepada mahasiswa dalam menerapkan teknik pemindahan beban yang aman dan ergonomis selama proses pengangkatan toolbox. Metode pelaksanaan meliputi identifikasi risiko kerja, sosialisasi prinsip manual material handling, demonstrasi teknik pengangkatan yang benar, pembagian tugas pengangkatan secara berkelompok, serta pendampingan selama proses pemindahan toolbox ke rak kerja. Teknik yang diterapkan meliputi menjaga posisi punggung tetap netral, menekuk lutut saat mengangkat, memegang beban secara seimbang, mengangkat menggunakan kekuatan otot tungkai, serta melakukan koordinasi gerakan antaranggota tim selama proses pengangkatan dan penempatan toolbox pada rak. Hasil kegiatan menunjukkan bahwa penerapan teknik pengangkatan ergonomis mampu memperbaiki postur kerja mahasiswa, meningkatkan koordinasi selama proses pemindahan, serta mengurangi potensi cedera akibat pengangkatan manual. Selain itu, toolbox berhasil dipindahkan ke rak kerja dengan aman sehingga memudahkan akses terhadap peralatan dan mendukung penataan bengkel yang lebih ergonomis. Kegiatan ini menunjukkan bahwa edukasi mengenai teknik manual material handling merupakan langkah sederhana namun efektif dalam meningkatkan keselamatan dan budaya kerja ergonomis di lingkungan laboratorium.
Co-Authors Anak Agung Alit Triadi ARIF KURNIAWAN Esa Ramdhan Ardi Mahendra Fakhmi Caesar Rahmadi Febrian Purnama I Chatur Adhi Wirya Aryadi I G.A.K Chatur Adhi W.A. I Gede Bawa Susana I Gusti Agung Ketut Chatur Adhi Wirya Aryadi I Kade Wiratama I Ketut Perdana Putra I Ketut Perdana Putra I Ketut Wiryajati I Made Adi Sayoga I Made Nuarsa I Made Nuarsa I Wayan Joniarta I.B. Alit I.M. Nuarsa I.M. Nuarsa I.M.A. Sayoga Ida Ayu Sri Adnyani Ida Bagus Alit M. Mirmanto, M. Made Wijana Made Wirawan Made Wirawan Rudy Sutanto Syamsul Ph.D M.A. Hadi Towilan Ma’bud Tri Rachmanto