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All Journal JREC (Journal of Electrical and Electronics) JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika JTTM: Jurnal Terapan Teknik Mesin Jurnal Pengabdian Kepada Masyarakat IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Teknik Informatika & Elektro (JITEK)
Indra Hermawan
Universitas Medan Area
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Public Health Social Sciences Veterinary Other

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Perancangan Oven Pengering Mie Berkapasitas 15 kg/jam untuk Mendukung Produktivitas PT. Star Umroh Food Muhammad Idris; Bobby Umroh; Uun Novalia Harahap; Iswandi Iswandi; Indra Hermawan; Mahliza Nasution; Darianto Darianto; Tino Hermanto; Yetti Meuthia Hasibuan
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 4 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v4i1.214

Abstract

Noodle drying at PT. Star Umroh Food still uses sunlight, so it depends on the weather, the temperature is not controlled, the productivity is low, and the level of product dryness is not uniform. This community service activity aims to design a gas-fueled dryer oven with a capacity of 15 kg/hour with forced convection. The methods are surveys, needs analysis, 2D and 3D design, specification analysis and evaluation. The results of the design of the oven with dimensions of 170 × 300 × 180 cm, a working temperature of 70 °C, and an estimated LPG consumption of 0.6 kg/hour. The prediction of increasing productivity and producing more uniform drying.
Analysis of Bending Strength of Composite Materials in Bipolar Plates for Fuel Cell Technology Husri Zarmawan; Iswandi Iswandi; Tino Hermanto; Darianto Darianto; Indra Hermawan; Muhammad Idris; Jufrizal Jufrizal; Yopan Rahmad Aldori
JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Vol. 9 No. 2 (2026): Journal of Electrical and System Control Engineering
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jesce.v8i2.14227

Abstract

This study aims to this study was to examine the effect of polypropylene (PP) plastic and activated carbon (AC) composition in a plastic composite material. The composite material was mixed using an internal mixer at a processing temperature of 220°C and a speed of 50 rpm. The mixture was then molded with dimensions of 100 mm in length, 15 mm in width, and 2,5 mm in thickness. The sample molding was performed using a compression molding method with a pressure of 1500 MPa at 250°C and a holding time of 300 minutes. Subsequently, the samples were cut according to the bending test dimensions following ASTM D790-03 standards, with dimensions of 100 mm x 12.7 mm x 2.5 mm. The test results for the polypropylene-activated carbon composite in the first composition showed a maximum stress point of 36.95 MPa and an elastic modulus of 4.3096 MPa, while the second composition showed a maximum stress point of 34.58 MPa and an elastic modulus of 3.371 MPa. These findings indicate that increasing the activated carbon composition in polypropylene polymer results in a reduction in bending strength.
Manufacture of a Horizontal Double-Screw Mixer for Fermented Feed Production with a 100 kg Batch Capacity Andhika Ariyudha; Darianto Darianto; Tino Hermanto; Yopan Rahmad Aldori; Iswandi Iswandi; Indra Hermawan; Muhammad Idris; Jufrizal Jufrizal
JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Vol. 9 No. 2 (2026): Journal of Electrical and System Control Engineering
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jesce.v8i2.14228

Abstract

In general, every livestock needs feed in the form of a mixture of livestock feed. The livestock feed fermentation process is currently phenomenal because it provides benefits that are felt by farmers. Maybe many people know the fermentation as a process of making supplement drinks only. It turns out not, the fermentation process can be used as an alternative to making high-quality livestock feed. In addition to being very simple to make, making feed by fermentation also saves time and money, because farmers are no longer busy with herding or grazing. This horizontal mixer machine has a capacity of 100 kg / Batch. In making this machine includes manufacturing processes such as: welding, grinding, drilling, bending, cutting torch or gas cutting, and non-permanent joints, namely nut and bolt joints. The components of the machine are: frame, tube, double screw, axle shaft, bossing, gear box, housing bearing, block bearing, pulley, v-belt, and electric motor. And then assembled and put together into a machine. From the above explanation, the following conclusions can be drawn: 1. Horizontal mixer machine with a tube diameter of 60 cm and a width of 90 cm, is capable of mixing 100 kg/batch of animal feed. 2. Horizontal mixer machine using a double screw produces a more homogeneous mixture compared to using the manual method.
Pemanfaatan Limbah Cangkang Telur Sebagai Katalis Biodiesel Dari Minyak Goreng Limbah Pada UMKM Roti Pakcik Tanjung Morawa Muhammad Idris; Indra Hermawan; Jufrizal Jufrizal; Yopan Rahmad Aldori; Supriatno Supriatno; Uun Novalia Harahap
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 3 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v3i3.258

Abstract

This Community Service Program focuses on managing micro-business-scale food production waste. The activity was carried out at Pakcik Tanjung Morawa Roti MSMEs in the Tanjung Morawa area. These MSMEs produce used eggshell waste and cooking oil every day. The waste has not been managed systematically and could pollute the surrounding environment. This program aims to increase partners' awareness of the value of organic waste. The program also introduces the concept of waste utilization as an alternative energy source.  The activity's approach is educational and informative through field visits. The methods used include observation, interviews, and two-way discussions. The team conveyed the potential of eggshells as a source of calcium oxide.  Calcium oxide serves as a biodiesel catalyst from waste cooking oil. Activities do not yet include technical training or process demonstrations. The activity results showed an increase in the partners' initial understanding. Partners show interest in sustainable waste management. This program results in a mapping of potential waste and partner needs. The output of the activity is documented in reports and follow-up plans. This program is the foundation for the next stage of technology assistance. A simple approach is assessed based on the partner's capacity. Activities support waste reduction and community-based environmental education. 
Identifikasi Jenis Aliran Pada Sistem Pipa Bertekanan Dengan Pompa Seri Dan Paralel Hotman Ginting; Jimy Lingga; Jufrizal Jufrizal; Indra Hermawan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.183

Abstract

Centrifugal pumps are widely used to move fluids through increased pressure efficiently. This study examines the effect of series and parallel pump configurations and valve opening variations on flow characteristics in a pressurized piping system. A laboratory experiment method with two repetitions was used. The results showed turbulent flow at 50%, 75%, and 100% valve openings with Reynolds numbers above 10,000. In comparison, at a 25% opening, series pumps tend to produce laminar flow (Re < 600), and parallel pumps maintain transitional/turbulent flow (Re > 4,000). The recommendation is to use series pumps for high pressure and parallel for large discharge, with a minimum valve opening of 25% for optimal efficiency.  
Evaluasi Performa Termal dan Listrik Robinson Engine dengan Fluida Kerja Uap Bertekanan Rendah dari Boiler Kecil Murahmad Parulian Marbun; Jufrizal Jufrizal; Indra Hermawan
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.v4i2.204

Abstract

This study evaluates the thermal and electrical performance of a Robinson steam engine powered by low-pressure steam (≤ 2.5 bar) from a small boiler. Experiments were conducted by varying the steam pressure from 0.5 to 2.5 bar to observe its effects on voltage, current, and power output. Results show that increasing steam pressure raised the voltage from 0 V to 4.52 V and the power output from 0 W to 6.1 W. The total electrical energy generated was 9.726 kJ, with an average conversion efficiency of 0.2127% and a peak efficiency of 0.3045% at 2.5 bar. Despite the low efficiency, the system demonstrates potential for small-scale power generation and educational use in energy conversion studies.
Co-Authors Achmad Jusuf Zulfikar Ade Wahyu Nugroho Agnita Yolanda Akhiruddin Akhiruddin amirsyam nasution Andhika Ariyudha Anggih Prasetyo Wibisono Arya Chandra Buana Lubis Bobby Umroh Darianto Darianto Dian Noviandri Edy Syahputra Fahmi Sulaiman Felix Darwin Jaya Waruwu Habib Satria Hotman Ginting Husri Zarmawan Ibrahim Ibrahim Ibrahim, Husin Iswandi idris Iswandi Iswandi Jimy Lingga Joko Joko Jufrizal Jufrizal M. Dalil M. Yusuf R Siahaan M.Y. Yuhazri Mahliza Nasution Muhammad Idris Muhammad Irwanto Mulia Mulia Murahmad Parulian Marbun Riky Wardhana Saturnus Wardiman Gulo Supriatno, Supriatno SUSI YANTI Syah Rinal Efendi Syamsun Nahri Tino Hermanto Uun Novalia Harahap Weriono Wikrama Jaya Sitepu Yetti Meuthia Hasibuan Yopan Rahmad Aldori