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R.E.M (Rekyasa Energi Manufaktur) Jurnal
Published by Universitas Muhammadiyah Sidoarjo
ISSN : 25275674     EISSN : 25283723     DOI : https://doi.org/10.21070/r.e.m
Core Subject : Engineering,
Engineering
Focus and Scope Aim: to facilitate scholar, researchers, and teachers for publishing the original articles of review articles. Scope: Mechanical Engineering include: Energy Conversion Renewable Energy Manufacturing Materials and Design Engineering Mechatronics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 155 Documents
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Numerical Analysis of Tensile Strength on Welding Joints Using Solidworks Software Iqbal Tanjung; Khairul Umurani
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 1 (2022): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i1.1630

Abstract

Objektif dari penelitian ini adalah untuk mengamati kekuatan tarik dan distribusi tegangan pada plat baja karbon rendah yang disambung menggunakan pengelasan Menggunakan Software Solidworks ®.Pada studi ini jumlah spesimen yang akan uji berjumlah tiga spesimen.Spesimen uji merupakan lembaran plat baja karbon rendah tebal 1,6 mm yang disambung menggunakan pengelasan dengan jenis SMAW. Sebelum dilakukan proses pembentukan material spesimen terlebih dahulu diuji komposisinya menggunakan Optical Emission Spectroscopy (OES).Geometri spesimen uji pada studi ini merujuk pada standar ASTM E8. Pengujian Tarik specimen dilakukan menggunakan UTM (universal testing machine) dangan spesifikasi hidrolik 5000 kgf.Selanjutnya pemodelan spesimen dibangun dan dimeshing menggunakan software solidworks 2020.Pada penelitian ini jenis elemen yang digunakan adalah elemen segitiga dan dilakukan proses adaptif mesh pada model spesimen. Proses meshing dilakukan dengan beberapa variasi panjang sisi elemen.Hasil pengujian tarik menunjukkan ketiga spesimen memiliki nilai kekuatan tarik yang tidak jauh berbeda pada kisaran ± 46.19 kgf/mm2. Hasil pengujian menunjukkan kerusakan spesimen terjadi pada area yang berdekatan dengan sambungan pengelasan.Hasil simulasi menunjukkan tegangan yang terjadi pada setiap variasi panjang sisi elemen memiliki trend nilai yang menurun, namun penurunan nilai ini tidak signifikan dan cendrung memiliki nilai yang konstant pada rentang 2,45 sampai 2,49 N/m2. Dari hasil simulasi didapat panjang sisi elemen 2 dan 4 memimiliki nilai yang paling mendekati hasil experimen. Hasil ini sesuai dengan kaidah yang berlaku dimana daerah yang disambung dengan pengelasan memiliki ketaguhan yang lebih baik dari area lainnya.
Effect of Green Body Heating Rate on Mechanical and Physical Properties of Crucible Materials Made from Evaporation Boats Waste M. Nuril Anwar Habiby; Rusiyanto; Rahmat Doni Widodo; Wirawan Sumbodo
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 1 (2022): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i1.1639

Abstract

Limbah evaporation boats merupakan limbah yang tidak dapat terurai tetapi memiliki daya tahan panasyang sangat tinggi sehingga perlu dimanfaatkan. Penelitian ini bertujuan untuk mengetahui pengaruh darilaju pemanasan terhadap sifat mekanis dan fisis material crucible yang terbuat dari limbah evaporation boats.Variasi laju pemanasan yang digunakan yaitu 2, 4, 6, 8, dan 10°C/menit saat proses pembakaran di dalam furnace.Komposisi material crucible menggunakan perbandingan berat limbah evaporation boats 70%, grafit 15%,kaolin 7,5%, castable SK-34 7,5%, dan 15% air bersih dari total berat campuran. Setiap bahan diayak denganayakan 100 mesh. Bahan tersebut dicetak menjadi spesimen sesuai standar ASTM C373-72 dengan tekanankompaksi sebesar 40 MPa. Pembakaran menggunakan temperatur 1000°C dan waktu penahanan selama 2 jam.Spesimen diuji kuat tekan, kekerasan Vickers, densitas, struktur mikro. Kuat tekan tertinggi sebesar 29,829 MPapada laju pemanasan lambat 2°C/menit. Nilai kekerasan terendah sebesar 12,64 HVN pada laju pemanasan10°C/menit. Nilai densitas tertinggi sebesar 2,39 g/cm 3 pada laju pemanasan 2°C/menit, sedangkan nilai terendahadalah 1,99 g/cm 3 pada laju pemanasan cepat 10°C/menit. Hasil struktur mikro pada laju pemanasan 2°C/menitmenghasilkan struktur distribusi fasa yang paling seimbang dan kepadatan terbaik pada material crucible.
Washbasin Design with DFMA Approach for Covid-19 Prevention Iswanto Iswanto; Ribangun Bamban Jakaria; Boy Isma Putra; Marzuki Ibrahim
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 1 (2022): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i1.1642

Abstract

The Covid 19 pandemic makes the need for a washbasin in a public place to prevent the spread of the virus. However, in practice the available washbasins are still not standardized and not ergonomic. So that in this study an ergonomic washbasin design was tried using the DFMA (Design for Manufacture and Assembly) method. Because using the DFMA method aims to improve the design. Through this method, it is possible to produce products with a shorter time and the number of components that are more effective in accordance with the function but have better design quality. In this study there were several components that were repaired, combined and removed, but did not change the function and usability of these components. So that this research resulted in a sink design that is modern, multifunctional, easy to use and comfortable.
The Effect of Variations in Impeller Shape on Discharge and Water Pressure on the Pump Prototype Fajar Riyanto; Arasy Fahruddin; Edmundo Tiago Belo
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 1 (2022): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i1.1632

Abstract

A pump is a device used to move fluid or something in the form of liquid by increasing the pressure so that it can flow from one place to another or from a low surface to a high surface. In everyday life, the need for water is very useful, so it requires a pump to be able to take it or drain it. In this thesis research will be tested by making a pump prototype using a dynamo drive, and changing the shape of the impeller blade and the number of immersions to determine the resulting water pressure and the resulting water discharge. So that it can find out which impellers are effective in producing water and can drain water faster.
Effect of Air Fuel Ratio to Quality of Municipal Solid Waste Using Downdraft Gasification Shafwan Amrullah; Cyrilla Oktaviananda
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 1 (2022): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i1.1640

Abstract

Gasifikasi menggunakan limbah padat kota (MSW) berdampak pada peningkatan kualitas lingkungan dan peningkatan pasokan listrik untuk daerah-daerah yang sulit dijangkau, khususnya di Indonesia. Namun proses gasifikasi membutuhkan proses pengujian kualitas terlebih dahulu agar dapat menghasilkan produk syngas dan kelistrikan yang maksimal. Maka dalam penelitian ini dilakukan proses pengujian pengaruh variasi Air Fuel Ratio (AFR) terhadap kualitas proses gasifikasi (Cold Gas Efficiency (CGE), Carbon Conversion Efficiency (CCE), dan specific fuel consumption (sfc) atau konversi konsumsi spesifik). Penelitian dilakukan dengan melakukan proses gasifikasi dengan tipe downdraft pada nilai AFR 0,5; 0,51; 0,53; 0,54; 0,55. Hasil penelitian ini menunjukkan adanya peningkatan nilai syngas seiring dengan peningkatan nilai AFR. Sedangkan nilai CGE meningkat seiring dengan meningkatnya AFR proses gasifikasi MSW. Peningkatan terjadi dari 9 menjadi 13%, meskipun hasil ini masih sangat rendah. Di sisi lain, CCE juga mengalami peningkatan dengan meningkatnya AFR gasifikasi MSW. Peningkatan nilai terlihat dari 33-43%. Hasil ini juga masih tergolong kecil, artinya efisiensi konversi karbon pada proses ini sangat rendah. Pada akhirnya, dapat dilihat bahwa nilai scf menurun dengan meningkatnya AFR. Penurunan yang didapat adalah dari 5,3 menjadi 2.
Aftermarket Wheels Numerical Simulation To Get Maximum Stress and Deformation Values Mulyadi Mulyadi; Akhmad Surya Wijianto; Iswanto
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 2 (2022): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i2.1568

Abstract

The purpose of this research is to get wheels with offset variants of -15, +20, and +35 made of aluminum alloy with a maximum load of 690 kg. Autocad 2018 and Unigraphic NX 8 were used to create all three designs. The load was calculated using the SAE J2530 standard and simulated using the ANSYS Workbench 14.5 application's numerical simulation method. As a result, the car rim is designed with a spoke form that becomes steeper (Concave) as the offset decreases. Methods a) Dynamic Cornering Fatigue Test, b) Dynamic Radial Fatigue Test, and c) Impact test consecutively at offset -15 of a) 62.33 MPa, b) 111.61 MPa, and c) 1.58 mm can be used to obtain numerical simulation results. For offsets of +20 of 70.91 MPa, 75.75 MPa, and 1.6 mm. And a) 90.33 MPa, b) 78.13 MPa, c) 1.61 mm at offset +35.
The Hardness and Microstructure of a Mixture of Used Plastic Waste HDPE, PET and Iron Filings Wawan Trisnadi Putra; Aliyadi; Kuntang Winangun
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 2 (2022): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i2.1636

Abstract

Plastik memegang peranan penting dalam kehidupan manusia, karena plastik merupakan salah satu bahan yang sering digunakan dalam kehidupan sehari-hari sebagai tempat makanan, botol minuman, dll. Plastik sering digunakan karena ringan, fleksibel, dan mudah dibentuk. Namun di era sekarang ini, plastik kini menjadi masalah baru karena menyebabkan sampah plastik membutuhkan waktu yang lama untuk terurai. Selain itu, sampah tidak hanya terkait dengan plastik, tetapi logam juga dapat menjadi limbah, seperti debu besi yang dihasilkan selama pemotongan dan pengeboran material besi. Dan solusi yang ditawarkan adalah dengan memanfaatkan seluruh limbah yang ada untuk dijadikan bahan baru berupa campuran plastik dan serbuk besi dengan metode pengepresan menggunakan panas/suhu, jenis plastik yang digunakan dalam penelitian ini adalah high density polyethylene, polyethylene terephthalate dan serbuk besi, kemudian komposisi pada kisaran HDPE 30% 50%, PET 30% 50% dan serbuk besi 10% 20% Made. Hasil persentase tersebut digunakan sebagai pedoman dalam pembuatan sampel, yang kemudian diuji kekerasan dan struktur mikronya. Setelah dilakukan pengujian nilai kekerasan tertinggi yaitu 2,63 Kgf/mm², dan nilai kekerasan terendah adalah 1,93 Kgf/mm², maka pada pengujian struktur mikro menunjukkan material dengan nilai tertinggi dan terendah, terdapat perbedaan udara yang terperangkap dalam material dan densitas dari hasil pengepresan.
Cofiring Effect of Using Sawdust on Exhaust Emissions at the Steam Power Plant Muhammad Farras Ilham; Nazaruddin Sinaga
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 2 (2022): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i2.1644

Abstract

Achieving the national energy mix in 2025 requires accelerating capacity development in new and renewable energy.Utilization of new and renewable energy potential aims to achieve the national energy mix target. One of the new renewable energy that has the potential to be developed in Indonesia is Biomass for fuel. One of the efforts to increase the use of biomass is by Cofiring. Biomass can be an effective alternative energy, in order to minimize the use of fossil fuels. The biomass is mixed into the coal bunker. The fuel mixture is flowed into the combustion chamber or furnace. Some of the advantages of doing biomass in PLTU include relatively lower investment and better environmental impact when compared to 100% coal. Cofiring PLTU has an effect on exhaust emissions, in evaluating the impact of exhaust emissions as a benchmark for environmental parameters, cofiring testing is carried out with reference to the Emission Quality Standard (BME).As a result, the effect of cofiring using 5% sawdust still has no significant effect on exhaust emissions at the CEMS (Continuous Emissions Monitoring System) PLTU. It is very possible that the type of coal used is still very influential on emission conditions, considering that the percentage of biomass used is still very small.
Design of Gasifier with Microwave-Based Technology with Steam and CO2 As Gas Agent To Produce Syngas Imron Rosyadi; Shofiatul Ula; Rivaldi; Kurniawan Putra Yudha
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 2 (2022): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i2.1645

Abstract

This research is motivated by the increasing gas emissions produced by industrial, automotive and household activities which mostly use fossil energy as an energy source. CO2 capture is introduced to the use of gasification technology in an effort to reduce CO2 emissions which are one of the causes of the greenhouse effect. The role of microwave is also introduced as an effort to increase thermal efficiency and increase production and quality of syngas and its role in reducing tar which is known to be high in biomass gasification. The utilization of water vapor is also clearly disclosed and its effect on syngas products, especially hydrogen gas. The role of the parameters that affect the gasification process is analyzed to see which variant has the best role in improving the quality and quantity of syngas. Research development opportunities are presented by looking at research gaps and future prospects
Potential and Challenges of Hydrogen Development as New Renewable Energy in Indonesia Efrando Manullang; Nazaruddin Sinaga
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 7 No 2 (2022): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v7i2.1647

Abstract

The use fossil energy consumption in Indonesia is increasing along with population growth and industrial development. Fossil energy oil and coal can produce greenhouse gas emissions and environment pollution. The largest producer of CO2 emissions comes from exhaust gases in the production process and motor vehicles. Indonesia's energy mix target in 2025 is around 23% from New and Renewable Energy (NRE). Given the importance of using NRE, Indonesia is starting to look for alternative energy that is environmentally and sustainable, like hydrogen energy. Green hydrogen technology has the potential to be developed in Indonesia. Hydrogen production processes commonly carried out are through the electrolysis of water, methanol, and biomass. The use of hydrogen can be applied to motor vehicles and power plants. Hydrogen can reduce greenhouse gas emissions. However, Indonesia has problems in developing green hydrogen technology, one of which is the high production cost, so it requires other parties to develop it.

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