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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Hasil Pengabdian Kepada Masyarakat Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika Multitek Indonesia : Jurnal Ilmiah Jurnal Ilmiah Teknik Mesin "MEKANIK" Ihsan: Jurnal Pengabdian Masyarakat Jurnal Pendidikan Vokasi Otomotif ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) International Journal of Economic, Technology and Social Sciences (Injects) Jurnal Polimesin
Ahmad Marabdi Siregar
Universitas Muhammadiyah Sumatera Utara
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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RANCANG BANGUN WIND TUNNEL SEDERHANA UNTUK ALAT PENDUKUNG STUDI EKSPERIMENTAL Siregar, Ahmad Marabdi
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 2 No 2 (2016): November 2016
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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Abstract

Rencana pengujian prototype turbin agin yang rotornya berdiameter 350 mm dan tinggi 540 mm dalam test section pada wind tunnel terkendala akibat tidak adanya wind tunnel yang memadai . Dengan dimensi prototype tersebut memerlukan spesifikasi wind tunnel yang memadai. Apabila pengadaannya melalui agen penyedia peralatan tentu akan sangat membutuhkan modal yang lumayan besar. Sementara itu sarana serta fasilitas workshop yang ada di sekitar sangatlah memungkinkan untuk melakukan rancang bangun terowongan angin. Komponen peralatan Wind tunnel, yaitu compressor, test section, dan diffuser-nya yang sebadan atau berhubungan langsung dengan drive section tidak akan bergetar kecuali blower dihidupkan dan pengujian akan dilakukan. Putaran blower akan menimbulkan efek getaran pada saat pengujian. Dalam pengujian sedapat mungkin getaran yang timbul dapat diminimalkan atau dihiliangkan, untuk itu rancangan terowongan angin kecepatan rendah ini yang mana bagian diffuser dengan bagian drive section akan dihubungkan dengan kain dan dibangun di work shop jurusan teknik mesin Universitas Sumatera Utara.
EFEK KECEPATAN PEMBEBANAN PADA BAHAN BAJA TERHADAP KEKUATAN TARIK IMPAK Siregar, Ahmad Marabdi; Nasution, Juliansyah Fauzan
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 4 No 1 (2018): Mei 2018
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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Abstract

Dalam proses manufaktur, karakteristik suatu material sangatlah penting. Salah satunya adalah strain rate (tingkat regangan). Pada tugas sarjana ini, penulis akan membahas pembebanan terhadap kekuatan tarik pada material baja karbon rendah yang memiliki kadar karbon 0,01% sampai 0,25%. Metode pengujian yang digunakan ialah dengan menggunakan metode Split Hopkinson Pressure Bar terhadap kekuatan beban tarik yang memberikan tumbukan (impact) pada material baja yang diuji. Spesimen baja yang digunakan kedua ujungnya dibentuk ulir sebagai penahan input dan output bar dan menggunakan collar sebagai penerus beban tekan pada saat melakukan pengujian. Karena adanya ketidaksesuaian dalam pencapaian proses pengujian terutama pada sensor rekam (strain gauges), maka penulis melakukan penelitian dengan menggunakan variasi beban terhadap spesimen uji.. Dari hasil penelitian yang didapat, pada beban 8, 9, 10 kg/cm2 baja yang merupakan spesimen uji tidak mengalami titik putus atau patah (fracture) melainkan mengalami buckling (penekukkan). Hal tersebut terjadi karena pada nilai beban 8, 9, 10 kg/cm2, baja karbon rendah memiliki sifat mekanik yang tangguh (toughness) dan liat (ductile) terhadap pembebanan tersebut.
UJI KEANDALAN PROTOTYPE TURBIN ANGIN SAVONIUS TIPE-U SEBAGAI PEMBANGKIT LISTRIK ALTERNATIF Siregar, Ahmad Marabdi; Lubis, Faisal
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 5 No 1 (2019): Mei 2019
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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Abstract

This time and in the future we must utilize renewable energy sources. The energy we use today is still dominated by fossil fuels which will gradually run out. One of the environmentally friendly renewable energy sources that we can use is wind energy. Wind turbines can be used to produce electrical energy, so that it can overcome one of the energy problems for people in need. Wind turbines that are suitable for low wind speed and medium wind speed are Savonius turbine types. For the development of the research a wind turbine prototype was made. This test was carried out on the prototype type U-type savonius wind turbine and the aluminum-based blade. The rotor has a diameter of 350 mm and a height of 440 mm. The study parameters measured are wind speed, rotor rotation speed, voltage and current of the generator. The performance of the U-type savonius wind turbine in this test is at wind speeds of 4 m/s to wind speeds of 6 m / s. At 6 m / s wind speed the maximum rotation of the turbine shaft is 33.80 rpm, wind power is 18.65 watts and produces electric power of 5.24 watts.
Desain Dan Pembuatan Mesin Pengaduk Srikaya Guna Membantu Meningkatkan Produktivitas Usaha Toko Roti di Kota Berastagi Sumatera Utara Ahmad Marabdi Siregar; Chandra Amirsyahputra Siregar; Khairul Umurani; Chairul Arif Gunawan Surbakti
IHSAN : JURNAL PENGABDIAN MASYARAKAT Vol 4, No 1 (2022): Ihsan: Jurnal Pengabdian Masyarakat (April)
Publisher : University of Muhammadiyah Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/ihsan.v4i1.9970

Abstract

Sesuai hasil survey di UKM produksi roti di daerah Berastagi, bahwa proses pemasakan dan pengadukan selai srikaya masih secara manual. Hal ini menjadikan proses produksi relatif lama untuk 10 kg butuh waktu 10 jam. Selain itu selai srikaya sering pecah pada saat proses pengadukan berlangsung dan tekstur akhir kurang bagus. Untuk solusinya pada penelitian ini dirancang Mesin Pengaduk Selai Srikaya yang bertujuan untuk membantu proses pembuatan selai srikaya, agar lebih efektif dan efisien. Metode yang akan dilakukan, mesin ini didesain menggunakan software solidwork, pengadukannya menggunakan penggerak motor listrik dan pemanasan kompor LPG. Selain itu untuk mencegah terjadinya kegosongan selai srikaya, tabung pemasakan didesain model double jacket agar tidak bersentuhan langsung dengan api. Hasil uji kinerja mesin pengaduk selai srikaya didapatkan kapasitas produksi 30 kg dalam 8 jam. Hasil kualitas selai srikaya tidak pecah dan teksturnya bagus. Proses pengadukan menggunakan motor listrik sehingga mudah cara pengoperasiannya.
Kajian Pengaruh Ketebalan Kaca Evaporator Terhadap Energi Yang Diserap Kolektor Pada Proses Desalinasi Air Laut Wawan Septiawan Damanik; Munawar Alfansury Siregar; Sudirman Lubis; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 4, No 2: September 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i2.8071

Abstract

The testing of desalination equipment is based on the increasing level of human need for the use of clean water. Improvement methods continue to be carried out with the aim of increasing the yield of clean water from desalination equipment. This research was conducted experimentally by providing a copper collector in a desalination device with a harpan to make it easier to absorb heat so that the water in the evaporator expands faster. By providing a variable difference in glass thickness, it is hoped that it can provide information that a good glass thickness can be applied to desalination equipment. The variation of the glass thickness is 4 mm and 5 mm with the same glass surface area. The results show that glass with a smaller thickness will make the desalination tool faster in absorbing heat energy. However, some conditions may also be considered to avoid damage to the glass. With the wind speed on the fourth day of testing which is 5.67 m/s and strong solar intensity reaching 397.14 W/m2, the energy absorbed by the collector reaches 3.72 kW/day on a glass thickness of 4 mm. Meanwhile, at a different thickness of 5 mm, the energy absorbed by the collector only reaches 2.72 kW/day. This shows that the difference in glass thickness plays a role in determining the occurrence of conduction heat transfer from outside the evaporator into the evaporator chamber.
Efek Penambahan APK Pipa Kapiler Bersirip Sebagai Penghantar Panas Terhadap Performance AC Pada Aplikasi ACWH Chandra Amirsyah Siregar; Ahmad Marabdi Siregar; Dana Setiawan
Rekayasa Material, Manufaktur dan Energi Vol 4, No 1: Maret 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i1.6689

Abstract

Technological advances encourage researchers to continue engineering technology. One of them is to increase the function of the Air Conditioner (AC) from air conditioning to air conditioning and the provision of hot water for bathing needs (Air Conditioner Water Heater / ACWH). This study aims to analyze the performance of the air conditioner due to the addition of a water heater application. The water capacity in the tank is 60 liters using a capillary tube heat exchanger with the addition of fins. The test was carried out at 3 different evaporator temperatures, namely 16 0C, 18 0C and 20 0C. Data were collected for 60 minutes. The result is that the ACWH application is able to provide hot water for bathing needs, with a temperature of 55.5 0C at the evaporator temperature test of 18 0C. However, the addition of this application resulted in a decrease in AC performance (COP). The COP AC value obtained in the 20 0C test was 3.071 while the ACWH application was 2.081.
Mamfaatkan Limbah Skrap Aluminium Untuk Knalpot Sepeda Motor Vega ZR Tahun 2011 Guna Mengurangi Polusi Udara Arie Pranata; Ahmad Marabdi Siregar; Budi Dharma; Wawan Septiawan Damanik; Arya Rudi Nasution
Rekayasa Material, Manufaktur dan Energi Vol 4, No 2: September 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i2.8077

Abstract

The number of motorized vehicles increases from year to year, the exhaust gases generated from these motorized vehicles cause air pollution by 70 to 80 percent, so efforts need to be made to control exhaust gas emissions. Considering the danger of exhaust gas emissions, the effort that needs to be made to control and reduce air pollution is the engineering and modification of the exhaust gas lines. Engineering and modification of exhaust gas lines, namely by innovating the exhaust by adding aluminum scrap. Researchers will conduct experiments and manufacture of tools and initial testing on motorized vehicles to see and observe the composition of exhaust gases produced from standard exhausts. The elements to be observed are the CO value, HC value, and CO2 value as comparison data. The tool that will be used to observe and see these elements is the Gas Analyzer. From the results of testing and analysis, data on exhaust emission tests with an average engine speed of 4000 rpm, and with an exhaust pipe temperature of 40 oC to 45 oC, were obtained. After testing the standard exhaust, then testing the modified exhaust and the addition of scrap 60 gr, 70 gr, and 80 gr aluminum obtained the best conclusion to reduce the danger of exhaust emissions from the modified exhaust added 60 gr aluminum scrap and when compared to the exhaust. the standard CO yield fell to 11.7%, HC fell to 4.26%, and CO2 fell to 1.59%.
Analisis Kekasaran Permukaan Cast Iron Menggunakan Cairan Pendingin Berbasis Nabati Pada Proses Face milling Arya Rudi Nasution; Affandi Affandi; Khairul Umurani; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 4, No 2: September 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i2.8073

Abstract

The machining process is a major activity in the industry, especially in the automotive industry. The machining process is inseparable from the coolant (coolant), where the role of the coolant in the machining process is to act as cool working conditions, material cleaning, and corrosion prevention. The use of cutting fluid has a negative impact when waste management is not carried out properly, and it will be damaging to the environment and public health. In order to reduce environmental and health damage, development and research have now been carried out for the use of vegetable-based cutting fluid. cutting fluid vegetable-based are biodegradable, eco-friendly, odorless, and non-toxic. This study wants to compare the value of surface roughness using CO (coconut oil) and dromus in face milling machining. The machine used in this research is the conventional Emco F3 milling machine and the tools used are the TPKN 22VC2 series carbide insert tools and the workpiece material used is cast iron (gray cast iron). the value of surface roughness by measuring the roughness using the TR200 surface roughness tool. The results of roughness observations show that the surface roughness value using CO cutting fluid at a cutting speed of 60 mm/min is 1,297 Ra, at a cutting speed of 70 mm/min the roughness value is 0.877 Ra and at a cutting speed of 80 mm/min, it is 0.429 Ra. While the results of measuring surface roughness on the material using a coolant dromus, cutting speed of 60 mm/min are 0.811 Ra, at a cutting speed of 70 mm/min the surface roughness value is 0.804 and at a cutting speed of 80 mm/min the surface roughness value is 0.698 Ra. So can the conclusion be that cutting fluid CO is good to use as a coolant at high cutting speeds.
Studi Eksperimental Pengaruh Kemiringan Sudut Terhadap Alat Destilasi Air Laut Memanfaatkan Energi Matahari C A Siregar; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 2, No 2: September 2019
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (734.243 KB) | DOI: 10.30596/rmme.v2i2.3671

Abstract

Indonesia is one country that is in a tropical climate that promises sunshine of all time. The abundant potential of solar radiation can be utilized in a distillation device to convert sea water into fresh water. This research aims to build a distillation device as a provider of clean water. Test equipment is designed and built with black fiber material with a size of 1.25 m x 0.8 m with a 3 mm thick glass cover with a capacity of 3600 ml of sea water. To find out the effectiveness of the distillation apparatus, it was tested with three variations of slope angles namely 300, 400, and 500. Tests carried out in the city of Medan. The testing method is done by evaporating seawater, evaporation occurs because of the absorption of heat from the sun through a solar collector's plate. The result obtained an effective slope angle is 300 with a production of 650 ml of fresh water. In addition to fresh water production, it is also known that the maximum sea water temperature is 730C at 12:20 WIB, the radiation heat transfer rate is 92.86 Watt
Rekayasa Saluran Gas Buang Sepeda Motor Guna Mengurangi Pencemaran Udara Ahmad Marabdi Siregar; C A Siregar
Rekayasa Material, Manufaktur dan Energi Vol 2, No 2: September 2019
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (708.139 KB) | DOI: 10.30596/rmme.v2i2.3672

Abstract

Air pollution from motor vehicle exhaust emissions is increasing, so it is necessary to attempt to control its exhaust emissions. Given the dangers of exhaust emissions, efforts need to be made to control and reduce air pollution so that negative impacts on people and the environment can be reduced. One engineering technology as a manifestation of vehicle emission control is engineering and modification of the exhaust gas channel. Engineering and modification is expected to be able to make a tool that will be able and function to reduce the danger of exhaust gases. The researcher will conduct experiments and manufacture of tools and initial testing on one motorized vehicle to see and observe the composition of the exhaust gas produced from the exhaust. The elements to be observed are CO values, HC values, and CO2 values as comparative data. The tool that will be used to observe and see these elements is the Gas Analyzer tool. This tool is one instrument that is useful for measuring the portion and composition of a combined gas. From the results of testing and analysis obtained data on the exhaust emission test with an average engine speed of 500 rpm, and with the temperature of the exhaust tube 40 0C to 45 0C. After testing the standard exhaust model, then testing the engineering exhaust model which added 50 gr, 70 gr, and 90 gr scrap of stainless steel obtained the best conclusion to reduce and reduce the danger of exhaust emissions is engineered exhaust which added 70 gr scrap of stainless steel . And when compared to a standard exhaust, CO elements dropped to 71.09% and HC elements dropped to 48.26% and CO2 elements dropped to 66.35%.
Co-Authors Affandi Affandi . Al-Amin, Surya Amiruddin, Arfis Arie Pranata Arya Rudi Nasution Aufa Afika Bobby Umroh Budi Dharma C A Siregar C A Siregar C A Siregar Chairul Arif Gunawan Surbakti Chandra A Siregar Chandra A Siregar Chandra A. Siregar Chandra Amirsyah Putra Siregar Chandra Amirsyah Siregar Dana Setiawan Dongoran, Rahmat Sati Efrida, Rizki Elvy Sahnur Nasution Fadillah, Fahri Fahrizal Zukarnain Fahrizal Zulkarnain Hadi Sucipto, Hadi Handoko, R Harahap, Reza Elvandra Hilda Nisti Zendrato Ika Pratiwi Pujianti Iqbal Raihan Irham Rosadi, Irham khairul umurani Khairul Umurani Kurniawan Syaputra Lubis, Faisal Lubis, Riadini Wanty M, Moranelo Mahjudin, Mahyunirsyah Mirzal Lubis ML Teguh Samudra Muharnif M Mulyadi Mulyadi Nasution, Juliansyah Fauzan Nofri, Irfan Pratama, Riza Fauzi Rahmatullah . Ricky Togu Firdaus Hutasoit Rizki Efrida S, Dendi Siagian, Nusyirwan Said Siregar, C A Siregar, Chandra A Siregar, Chandra Amirsyah Putra Siregar, Chandra Amirsyahputra Siregar, Irpansyah Siregar, Irpansyah Siregar, Munawar Alfansury Sri Frapanti Sudirman Lubis Suwandi, A Syarizal Fonna Syifaul Huzni Tanjung, Iqbal Tanjung, Iqbal Tony Siagian Umurani, K Umurani, Khairul Wahyu Kurniawan Wawan Septiawan Damanik Weriono