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All Journal JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika Jurnal Ilmiah Teknik Mesin "MEKANIK" IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Teknik Sipil dan Arsitektur (JITAS) Jurnal Ilmiah Teknik Informatika & Elektro (JITEK)
Iswandi Iswandi
Universitas Medan Area
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Perancangan Mesin Pencacah Polimer Komposit untuk Aplikasi Komponen Fuel Cell M Rizky Maulana; Ahmad Fauji S; Iswandi Iswandi; Bobby Umroh
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.v4i2.285

Abstract

This study aims to design a composite polymer shredding machine with a capacity of 50 kg/h to enhance recycling efficiency. The machine is powered by a 3 HP electric motor, equipped with a 1:50 ratio reducer and 200 mm diameter blades. Technical analysis encompasses calculations of cutting force, torque, and throughput, supported by CAD/CAE modeling to validate the structural design. The results show a shredding capacity of 833.33 g/min, cutting force of 47.088 N, and torque of 9.4176 Nm. The machine features a compact, energy-efficient design and delivers consistent output. A UNP steel frame ensures structural stability against dynamic loads. With good efficiency and sustainability, this design is suitable for small to medium-scale industries involved in composite polymer material processing.
Studi Performa Mesin Pencacah Polimer Komposit Berbasis Uji Laboratorium Danial Jack Marbis Sianturi; Theo Fredrik Tumangger; Yopan Rahmad Aldori; Iswandi Iswandi; Bobby Umroh
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.v4i2.290

Abstract

Polymers are the result of monomer polymerization with a lower density than metals but a much smaller elastic modulus, making them less rigid and strongly affected by temperature. This study evaluates the performance of a laboratory-scale crushing machine for polypropylene blended with activated carbon at varying compositions. The machine employed carbon steel rotary blades driven by a 1 HP electric motor through a gearbox transmission. Results showed average crushing times of 3.5–4 minutes/kg. Pure polypropylene produced a 72% fine fraction, while adding 10% activated carbon reduced it to 65%. Crushing efficiency remained above 85%, demonstrating stable performance and feasibility for composite material applications.
Evaluasi Variasi Kondisi Operasi Terhadap Perpindahan Panas Kondensor Pada Proses Destilasi Daun Serai Wangi Arga Daniel Pratama Sirait; Darianto Darianto; Iswandi Iswandi; Bobby Umroh; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.299

Abstract

The condenser plays a crucial role in determining the efficiency of lemongrass (Cymbopogon citratus) essential oil distillation by facilitating heat transfer and vapor condensation. This study analyzes the effect of varying operating conditions on the heat transfer rate, Log Mean Temperature Difference (LMTD), condenser effectiveness, and citronella oil production. The evaluation involved three test variations, comparing heat transfer parameters and condenser performance. The results indicate that the heat transfer rate increased from 152,438.27 W in Variation I to 170,963.54 W in Variation II, reaching 186,544.68 W in Variation III. This increase was accompanied by a rise in the LMTD value from 25.18°C to 29.74°C, an improvement in condenser effectiveness from 81% to 89%, and an increase in the conversion of condensate vapor mass into citronella oil from 28% to 36%. These results demonstrate that the increase in heat transfer rate is directly proportional to condenser effectiveness and the success of the condensation process. Variation III represents the optimum operating condition, as it yielded the most efficient heat transfer and the best condenser performance during the citronella leaf distillation process.
Analisa Unjuk Kerja Blower Sentrifugal Pada Mesin Turbo Chopper Jerami Padi Sebagai Pakan Ternak Alternatif Darianto Darianto; Fadly Ahmad Kurniawan; Zulfikar Zulfikar; Iswandi Iswandi; Nicolas Sabar Hutasoit
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.84

Abstract

This study aims to analyze the performance of a centrifugal blower in a Turbo Chopper for Rice Straw as Ruminant Livestock Feed. Conducted over six months at a machine production workshop in Medan Perjuangan, the research employed a qualitative method. The focus was on the blower's impeller, a critical component for increasing air pressure. Tests were performed on impellers with varying numbers of blades (4, 6, and 8) at a constant speed of 1400 rpm. The results showed that the impeller with 4 blades produced the highest wind speed of 4.8 m/s and the greatest efficiency of 0.029%. The study also included an analysis of the blower's torque, flow capacity, and efficiency. These findings are significant for industrial applications, particularly in the process of chopping rice straw, where the centrifugal blower can enhance operational efficiency and effectiveness. This study provides insights into the use of centrifugal blowers to improve the performance of agricultural equipment and potential applications in other industries.
Co-Authors Achmad Jusuf Zulfikar Ade Wahyu Nugroho Aginta Yolanda Ahmad Fauji S Aldiansyah Putra Alfian Ramadhan Andhika Ariyudha Anggih Prasetyo Wibisono Arga Daniel Pratama Sirait B Umroh Bobby Umroh Butar-Butar Hafidz Corlenius Try Orlando Danial Jack Marbis Sianturi Darianto Darianto Denny Fachri Mariadi Fadly Ahmad Kurniawan Felix Darwin Jaya Waruwu Haniza Heri Prinando Nasution Husri Zarmawan Indra Hermawan Jhonatan Lumbantoruan Jufrizal Jufrizal Khairul Suhada M Rizky Maulana Mahliza Nasution Mahmuddin Al Rasid Muhammad Idris Muhammad Irwanto Nicolas Sabar Hutasoit Rahmat Pande Raja Lubis Rhenaldy Primananda Pangaribuan Rizal Afandi Purba Rizky Fauzi Shera Dwy Siagian, Alfonsius Syafruddin Ritonga Theo Fredrik Tumangger Tino Hermanto Uun Novalia Harahap Vicky Frans Malau Yetti Meuthia Hasibuan Yopan Rahmad Aldori