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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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PENGARUH JARAK PIRING ROTARI PADA MESIN PENGUPAS KENTANG Siagian, Alfonsius; Iswandi, Iswandi
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2020): Mei 2020
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kentang merupakan salah satu bahan pangan yang mampu menggantikan bahan pangan utama dunia setelah padi, gandum dan jagung. Disamping itu, kentang termasuk salah satu komoditas hortikultura yang mempunyai nilai perdagangan domestik dan potensi ekspor yang cukup baik. Menentukan jarak proses terbaik untuk menghasilkan produk yang berkualitas dari hasil pengupasan terbaik. Tujuan penelitian ini adalah untuk mengetahui jarak piring rotari pada proses pengupasan kulit kentang dari hasil pengupasan terbaik.Pengujian dilakukan dengan terlebih dahulu mempersiapkan bahan baku kentang dengan jenis kentang kuning sebanyak 9 kg dengan massa 1 kg setiap percobaan. Pengujian ini dilakukan pada variasi jarak 8cm, dengan kecepatan putaran 49 Rpm pada satu siklus. Berdasarkan hasil pengujian diperoleh berdasarkan jarak piring rotary terbaik adalah pada jarak 7 cm dengan kapasitas 40 kg/jam dan dengan daya terbaik adalah 35,294 watt. Kata kunci : Uji kinerja, pengupasan kentang, piring rotari
Analisis Pengaruh Ukuran Batubara Terhadap Performa PLTU dengan Jenis Boiler Tipe Chain Grate Muhammad Idris; Anggih Prasetyo Wibisono; Indra Hermawan; Iswandi Iswandi; Uun Novalia Harahap
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol 6, No 1 (2022): EDISI JUNI
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v6i1.5985

Abstract

Based on ASME standard section VII, Part. 13, the recommended coal sizing for boiler stoker is 32 mm with a maximum mixture of 25% in 6 mm. PLTU Tanjung Balai Karimun (2x7 MW) which has a chain grate type of stoker boiler, for its operation using mostly in fine particle coal size with 58% in 31,5 mm – 2,38 mm and 17% in < 2,38 mm.  Regarding the use of non-standard ASME coal size on boiler stoker, the aim of this research is to know the effect of that coal to the performance of the power plant in the term of specific fuel consumption (SFC), turbine heat rate (THR), gross plant heat rate (GPHR), net plant heat rate (NPHR) and thermal efficiency of the cycle. After analyzing and calculating the operation data of the power plant, it is known that to produce 1 kWh of power, the power plant that uses fine particle coal size has a 26,80% higher on SFCgross and GPHR value, 25,87% higher on SFCnetto and NPHR value, and also 0,47% higher on THR value, but the thermal efficiency value is 4,43% smaller than when the power plant operates using standard ASME coal size. So it can be concluded that to produce 1 kWh the power plant when operating using non-standard ASME coal size requires more both energy and coal than when the power plant operates using standard ASME coal size
Analisis Perpindahan Panas pada Kondensor dengan Metode Lmtd pada Proses Pirolisis Ampas Kelapa Denny Fachri Mariadi; Muhammad Idris; Iswandi Iswandi; Syafruddin Ritonga; Uun Novalia Harahap
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol 6, No 1 (2022): EDISI JUNI
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v6i1.5984

Abstract

 Pirolisis merupakan proses dekomposisi kimia bahan organic melalui proses pemanasan tanpa atau sedikit oksigen  atau regen lainnya, dimana material mentah akan mengalami pemecahan struktur kimia menjadi fase gas. Pirolisis dilakukan di sebuah reactor dengan pengurangan atmosfer (hampa udara) pada temperatur hingga 8000 C.  Konversi biomasa menjadi bahan bakar terdiri dari 2 cara Biochemical dan Thermochemical. Pada penelitian ini penulis akan mengkonversi biomasa ( ampas kelapa )  dengan cara pirolisis. Tujuan penelitian ini di lakukan untuk menganalisis laju perpindahan panas pada kondensor dengan mengunakan metode LMTD log mean temperature difrent. Bahan yang di uji pada penelitian ini adalah sisa ampas kelapa dari industri pmerasan santan kelapa yang banyak terbuang sia-sia. Bahan yang telah di dapatkan kemudian di pirolisis di reactor pirolisis. Dari hasil pengujian dapat di ketahui bawah analisis perpindahan panas dengan metode log mean temperature different aliran berlawanan arah lebih efektif di gunakan dibandingkan dengan aliran searah, efektifitas kondensor sebesar 97,9%  pada aliran berlawanan aran dan pada aliran searah sebesas 88.8%. Nilai kondensasi filem di dapat sebesar 9.8% Pada aliran berlawanan arah dan 3.2% pada aliran searah yang merupakan hasil luaran biooil.
ANALISIS KOMPOSISI KOMPOSIT POLIPROPILEN/KARBON AKTIF TERHADAP KEKUATAN BENDING UNTUK APLIKASI PLAT DWIKUTUP FUEL CELL Iswandi Iswandi; Muhammad Idris; Indra Hermawan; Yopan Rahmad Aldori; Muhammad Irwanto
Jurnal Teknovasi : Jurnal Teknik dan Inovasi Vol 9, No 1 (2022): TEKNOVASI APRIL 2022
Publisher : LPPM Politeknik LP3I Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55445/teknovasi.v9i1.661

Abstract

Carbon-based material is one of the main filler materials for the manufacture of polymer composite bipolar plates for fuel cell applications. Some variation materials filler based carbon used on manufacture bipolar plate white high cost.  Determine of low cost filler materials is one of special issue for manufacture bipolar plate. Activated carbon is a alternative for suitable filler material base carbon at polymer composite and easy to find in Indonesia. This study investigates the effect of activated carbon composition in polymer composites on bending strength with a composition of 10, 20, 30, 40 (percent by weight) activated carbon (AC) with a polypropylene (PP) matrix. The sample has fabricated used hot press mouding with mix process at 220o­­­ C temperatures with 320 Psi pressure in 20 minutes. The bending test results with the standard three point bending test ASTM D790-03, The best value was found at a composition of 10% by weight of activated carbon of 26.9 MPa. This achievement has been obtained the Department of Energy, United State Of America (DOE USA) standard is 25 Mpa. This condition due to the polymer's composition of 10% KA to 90% PP, which makes it easier for the polymer to yield higher bonding and hence boost bending strength.
Analisis PLTS Sebagai Sumber Daya Sistem Pakan Ikan Otomatis Muhammad Idris; Indra Hermawan; Iswandi Iswandi; Felix Darwin Jaya Waruwu
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 1 No 3 (2022): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v1i3.35

Abstract

The purpose of this study was to determine the angle of inclination of the 10 WP solar panel so that the maximum amount of sunlight that falls on the surface area of the solar cell, analyze the performance of the solar cell, calculate the duration of charging the battery using a 10 WP solar panel. The method used is an experiment by recording every 10 minutes the output current and voltage of a 10 WP solar panel and battery, the current and voltage entering the battery and recording the intensity of sunlight using a solar meter. The overall results, based on theory and experiment, are that the angle of inclination of the solar panel is 10 WP so that the maximum amount of sunlight that falls on the surface area of the solar cell is at an angle of 9.3620 at 12.00 WIB facing south where the instantaneous intensity of sunlight hitting the solar panel at is 1049 W/m2, the performance of the solar cell is obtained by an average output current of solar panels 0.1295 A, the average output voltage of solar panels is 14.3162 V, the average output power of solar panels is 1.8798 W, the average the power that hits the solar panel is 59.3811 W, and the average panel efficiency is 3.1707%, the duration of charging the battery using a 10 WP solar panel is approximately 29 hours 8 minutes so that the battery is fully charged or approximately 2 days 5 hours 8 minutes.  
Analisis Kekuatan Komposit Laminat Hybrid Jute E-Glass Berdasarkan Pola Kerusakan dengan Metode Split Tensile Test Rizal Afandi Purba; Achmad Jusuf Zulfikar; Iswandi Iswandi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 1 No 3 (2022): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v1i3.37

Abstract

Research on composite materials continues to experience significant development in line with human needs for products that are lighter, stronger, easier to form, environmentally friendly, and low cost. Alternative materials sourced from natural materials such as the Jute plant combined with synthetic e-glass materials are a top priority to achieve the target of materials that are strong but environmentally friendly. In this study, the investigation aimed to analyze the effect of applying hybrid laminated composite materials of woven jute fiber sheets and e-glass (KLHJG) to cylindrical column concrete by calculating the percentage of the crack pattern (PPR) that occurs and then comparing it to the split tensile strength (KTB). ) to get the phenomenon that occurs. Specimens were printed using the ASTM D496 standard for splitting tensile strength testing. PPR is calculated using the Histogram method with the help of Adobe Photoshop software. The result obtained is that the provision of KLHJG on cylindrical column concrete can reduce PPR to below 20%. However, the JGJG composition obtained a PPR greater than 30% which indicates that this composition is not very effective in protecting the concrete structure against the external load it is subjected to.
Analisis Kekuatan Tarik Komposit Laminat Jute Berdasarkan Pola Kerusakan Kolom Silinder Metode Split Tensile Test Mahmuddin Al Rasid; Zulfikar Zulfikar; Iswandi Iswandi
Jurnal Ilmiah Teknik Sipil dan Arsitektur (JITAS) Vol 1, No 2 (2022): Jurnal Ilmiah Teknik Sipil dan Arsitektur (JITAS)
Publisher : Jurnal Ilmiah Teknik Sipil dan Arsitektur (JITAS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitas.v1i2.1454

Abstract

The purpose of this study is to obtain the damage pattern of cylindrical column concrete specimens (BKS) reinforced with laminate jute composite (KLJ) based on the results of the Split Tensile Test, to find out the phenomenon of applying laminated jute composite reinforcement to cylindrical column concrete to the percentage of crack patterns ( PPR) specimens, and analyze the comparison between split tensile strength (KTB) and PPR. The test specimens were printed based on the ASTM C496 test standard using the Vacuum Bagging method. Specimen variations consist of 1 to 4 layers of KLJ and one variation without KLJ sheath as a control specimen. The split tensile test used the UTM test tool with each variation being carried out 3 repetitions. PPR observations and calculations were carried out with the help of Adobe Photoshop software. The results of the study show that the greater the KTB value, the greater the PPR that occurs. The increase in PPR in each KTB is reported in this article.
Pengaruh Variasi Fluida Pendingin Terhadap Laju Pendinginan Engine Yamaha Nmax Ade Wahyu Nugroho; Muhammad Idris; Indra Hermawan; Iswandi Iswandi
Jurnal Ilmiah Teknik Informatika & Elektro (JITEK) Vol 1, No 2 (2022): Jurnal Ilmiah Teknik Informatika & Elektro (JITEK)
Publisher : Jurnal Ilmiah Teknik Informatika & Elektro (JITEK)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitek.v1i2.1473

Abstract

Radiator is a cooling system using fluid as a heat exchanger. How the radiator works by channeling the heat released by the motor engine is then absorbed by the radiator coolant fluid. The radiator device consists of a coolant inlet and engine outlet, a cooling fan mounted in front or behind the radiator, and coolant. Coolant in the radiator has a very important role in dissipating engine heat to the environment. In this study, I will analyze the different types of coolant variations, namely water, prestone antifreeze, Seiken, premix coolant DCK, and yamacoolant. on the cooling rate and radiator effectiveness using rotation variations of 1600, 3000,5000 rpm and measurement times of 1, 5, and 10 minutes on the Yamaha Nmax engine. The results of the research that have been carried out are the average heat transfer rate and the highest radiator effectiveness occur in the Yamacoolant type cooling fluid of 1.992kW and 0.726, the second highest occurs in the Prestone cooling fluid where the heat transfer rate value is 1.918kW and the radiator effectiveness is 0.652, then followed by Seiken where the heat transfer rate is 1.901kW and the radiator effectiveness is 0.634, then followed by DCK the heat transfer rate is 1.702kW and the radiator effectiveness is 0.592 and the smallest is experienced by mineral water where the heat transfer rate is 1.542kW and the radiator effectiveness is 0.501.
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.
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