Sprocket : Journal of Mechanical Engineering
SPROCKET Journal of Mechanical Engineering (SJoME) adalah jurnal ilmiah yang berisi tentang publikasi hasil karya penelitian, perancangan dan kajian teori di bidang ilmu teknik mesin dan permesinan, meliputi konversi energi, manufakturing, material dan perancangan desain produk. SJoME diterbitkan oleh Program Studi Teknik Mesin Fakultas Teknik, Universitas HKBP Nommensen, Medan Indonesia. SJoME terbit 2 (dua) kali dalam setahun, yaitu pada bulan Februari dan Agustus.
Articles
92 Documents
<![CDATA[Perhitungan Energi Bagi Kebutuhan Pengepresan Kopra Pada Perancangan Mesin Press Minyak Kelapa ]]>
<![CDATA[Richard A M Napitupulu]]>;
<![CDATA[Alberto Hutauruk]]>;
<![CDATA[Miduk Tampubolon]]>;
<![CDATA[Lestina Siagian]]>;
<![CDATA[Parulian Siagian]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 1 (2019): Edisi Agustus 2019 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sproket.v1i1.33
<![CDATA[An experiment has been conducted to determine the amount of deformation energy and energy per volume needed for the design of coconut oil press machines. By using a press tube with a diameter of 59 mm and by varying the load of press and speed of press the results obtained that to produce the optimal average volume of coconut oil are at the pressure load of 40 KN and the pressure rate of 6 mm / minute. The ideal energy per volume used to suppress coconut oil press machine is 6.106 J / m3.]]>
<![CDATA[Riset Penggunaan Pemanas Air Tenaga Surya di Perhotelan Indonesia - Sebuah Kajian Literatur ]]>
<![CDATA[Samar Tan]]>;
<![CDATA[Richard A M Napitupulu]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 1 (2019): Edisi Agustus 2019 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sproket.v1i1.34
<![CDATA[Hospitality is a relatively large energy user in the tourism sector. The application of renewable energy in this field will certainly save energy and contribute to reduce the effect of global warming. An interesting application to study is the use of solar energy for preparing hot water in hotel. This study is a literature study that explored research articles on solar water heater, especially used in hospitality, that have been published. Studies on solar energy have always increased over the past five years, 66.2% of which were in the field of solar thermal energy, where 11.2% of solar thermal energy researches were related to the use of solar energy for the process of heating water. For the research originating from Indonesia, the figures are 48.7% and 6.6% respectively. There is no research on the use of solar water heater in Indonesia. Research on tourism in Indonesia itself tends to decline. A simple example of simulation about solar water heating system using TRNSYS 18 simulation program was presented to motivate researchers in this field.]]>
<![CDATA[Pengujian Alat Pembangkit Listrik Tenaga Surya Solar Cell Sederhana ]]>
<![CDATA[Sibuk Ginting]]>;
<![CDATA[Richard A M Napitupulu]]>;
<![CDATA[Jusuf Halawa]]>;
<![CDATA[Libianko Sianturi]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 1 (2019): Edisi Agustus 2019 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sproket.v1i1.35
<![CDATA[One of the sources of electricity technology is solar cell. in principle solar cell converts solar energy into electrical energy, here a simple solar cell made of copper that is designed simply with copper material containing oxide is made into the negative side of the solar cell and positive as a copper palat which does not contain oxide / is not baked on electric stove in the design of this simple solar cell where the copper cross section area containing oxide with a size of 25cm x 30cm and the size of copper plate that does not contain oxide with U-shaped is 29cm x 32cm and coated with glass as a reflector with a size of 32cm x 34cm where in solar design This simple cell was conducted for 2 days during a solar cell experiment for 2 days with the highest voltage of 4.4 V, which is on the first day and the voltage on the second day gets the highest voltage of 4.0 V with the intensity different light.]]>
<![CDATA[Pengaruh Waktu Tahan Dan Penambahan Kadar Garam Dapur (NaCl) Dalam Media Pendingin Air Pada Proses Hardening Terhadap Sifat Mekanik Dan Struktur Mikro Baja Karbon Rendah ]]>
<![CDATA[Richard A M Napitupulu]]>;
<![CDATA[Suriady Sihombing]]>;
<![CDATA[Charles Manurung]]>;
<![CDATA[Jonner Togatorop]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 1 (2019): Edisi Agustus 2019 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sproket.v1i1.36
<![CDATA[This study aims to determine the effect of salt (NaCl) in water cooling media with different levels of 10%, 16% and 25% against the hardness level of low carbon steel tested with Vickers after hardening in the hardening process and to determine the proportion of media which coolant produces the highest hardness from the use of water cooling media which is added to different levels of NaCl. The independent variable in this study is the amount of salt (NaCl) dissolved in water cooling media with different percentages, namely 10%, 16% and 25%. While the dependent variable is the value of the hardness of the material tested with Vickers. Hardness in the hardening process with water cooling media which added different salt (NaCl), 10%, 16% and 25% is 185.02 VHN, 229 VHN and 284 VHN. From the results of the study it was found that there was an effect of the salt content (NaCl) in the water cooling media on the level of hardness in the hardening process of low carbon steel. Higher level of salt will increase value of hardness. The highest hardness was achieved in cooling media with a concentration of 25% NaCl that is equal to 284 VHN followed by cooling media with a concentration of 16% NaCl of 229 VHN and the lowest was a cooling medium with a concentration of 10% NaCl of 185.02 VHN.]]>
<![CDATA[Pengaruh Perbedaan Ketebalan Irisan Asam Gelugur (Garcinia atroviridis) Terhadap Kandungan Total Asam Pada Asam Sitrat Dengan Pengeringan Sinar Matahari Sistim Konveksi Paksa ]]>
<![CDATA[Parulian Siagian]]>;
<![CDATA[Tumiur Gultom]]>;
<![CDATA[Sibuk Ginting]]>;
<![CDATA[Hotman Manurung]]>;
<![CDATA[Eko Y Setyawan]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 1 (2019): Edisi Agustus 2019 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sproket.v1i1.38
<![CDATA[The mechanism of the drying process is the process of heat transfer and mass transfer that takes place simultaneously. The pressure of the water vapor in the acid gelugur is higher than that on the surface interface of the gums and air acids. Intensity solar radiation averages around 300-590w / m2 and Ambient Temperature 28,830C. The hot air condition in the drying box averages 320C. The content of total citric acid gelugur acid was 1.2787% with 3mm slice thickness and 1.3981% with a 5mm slice thickness. Drying is done from 08.00-17.00 am with a hot air flow rate of 1.5m/s.]]>
<![CDATA[Kinerja Peralatan Magnetik Untuk Meningkatkan Performansi Dan Mengurangi Emisi Gas Buang Pada Mesin OTTO Empat Langkah ]]>
<![CDATA[Tulus Burhanuddin Sitorus]]>;
<![CDATA[Mulfi Hazwi]]>;
<![CDATA[Jaya Arjuna]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 1 (2019): Edisi Agustus 2019 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sproket.v1i1.52
<![CDATA[National energy data note that Indonesia fossil energy potential consisting of petroleum, natural gas and coal can only last for 10 years, 31 years and 80 years from now if no new fossil energy reserves are found. It is necessary to save energy to anticipate these conditions. One of the efforts that have been done is saving the consumption of fuel oil that is used in the internal combustion engine. This research aims to increase the performance by reducing fuel consumption and exhaust emissions by using magnetic devices. The equipment of magnetic is placed on the intake manifold which is varied 10 cm, 20 cm, and 30 cm from the combustion chamber to determine the effect of installing a magnetic field on the performance of the Otto engine. Gas emission analyzer is placed on the exhaust gas section. Besides that, there were also variations in engine speed consisting of 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, and 4000 rpm. Experimental data show that there is an increase in power and thermal efficiency and a decrease in specific fuel consumption when the engine uses magnetic devices ranging from 5.99-22.02%. The exhaust gas emissions produced by Otto engine also decreased for CO and HC thereabouts 6-20%.]]>
<![CDATA[Desain dan Manufaktur Model Piston Jupiter MX 135 cc Dengan Menggunakan 3D Printer ]]>
<![CDATA[Wandro Siregar]]>;
<![CDATA[Richard A.M. Napitupulu]]>;
<![CDATA[Parulian Siagian]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 2 (2020): Edisi Februari 2020 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sprocket.v1i2.161
<![CDATA[A product that will be mass produced requires an initial prototype so that it can assess whether a product design meets the desired criteria and is ready to be mass produced. For the purposes of making the initial prototyping, one alternative is to use 3D printing. Prototyping is an early example of a concept as part of the product development process. Rapid Prototyping allows the visualization of a 3D (three-dimension) image into an original three-dimensional object that has a volume. In addition, rapid prototyping products can also be used to test certain parts. In the design process the 2017 Solidworks software and manufacturing process are used anet type 3D printer. In the manufacturing process many 3D Printer parameters must be regulated and very influential on the manufacturing results to be obtained, including the 3D printer parameter settings in the slicing process. This is a process that is very influential on the results, where the process of slicing the material temperature, printing speed, wall thickness, layer thickness and support must be set properly. In the future it is expected that research on 3D printing manufacturing results with the same printer parameters for the design results of some CAD software.]]>
<![CDATA[PERFORMANSI PEMANAS AIR TENAGA SURYA DENGAN PENAMBAHAN SIRIP PADA PIPA KOLEKTOR ]]>
<![CDATA[Himsar Ambarita]]>;
<![CDATA[Firman Siahaan]]>;
<![CDATA[Herdy -]]>;
<![CDATA[H.V Sihombing]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 2 (2020): Edisi Februari 2020 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sprocket.v1i2.180
<![CDATA[The solar energy that reaches the earth's surface can be converted into heat energy using solar collectors. Inside the collector, there are several components including a heating pipe as a medium to drain water to the storage tank. There are several factors that increase the performance of solar collectors including the addition of fins to the pipe which will increase the collector's cross-sectional area. This study compares solar collectors with and without the addition of fins, the aim of improving the performance of solar water heater collectors with the addition of fins. Where the dimensions of the fins used are 50 x 12 x 0.3 mm. testing is done by comparing the two collectors. The results showed an increase in temperature in solar water heaters with the addition of fins to the pipe and an increase in efficiency of 18.67% compared to solar water heaters without the addition of fins.]]>
<![CDATA[Desain dan Pembuatan Prototype Piston Honda MEGAPRO FI Menggunakan 3D Printing ]]>
<![CDATA[Frince Marbun]]>;
<![CDATA[Richard A M Napitupulu]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 2 (2020): Edisi Februari 2020 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sprocket.v1i2.184
<![CDATA[3D printing technology has great potential in today's manufacturing world, one of its uses is in making miniatures or prototypes of a product such as a piston. One of the most famous and inexpensive 3D printing (additive manufacturing) technologies is Fused Deposition Modeling (FDM), the principle FDM works by thermoplastic extrusion through a hot nozzle at melting temperature then the product is made layer by layer. The two most commonly used materials are ABS and PLA so it is very important to know the accuracy of product dimensions. FDM 3D Printing Technology is able to make duplicate products accurately using PLA material. FDM machines work by printing parts that have been designed by computer-aided design (CAD) and then exported in the form of STL or .stl files and uploaded to the slicer program to govern the printing press according to the design. Using Anet A8 brand 3D printing tools that are available to the public, Slicing of general CAD geometry files such as autocad and solidwork is the basis for making this object. This software is very important to facilitate the design process to be printed. Some examples of software that can be downloaded and used free of charge such as Repetier-Host and Cura. by changing the parameters in the slicer software is very influential in the 3D printing manufacturing process.]]>
<![CDATA[Analisis FEM Dari Suhu HAZ Dengan Pemodelan Sumber Panas Pada Proses Butt-Joint Menggunakan MSC Marc Mentat ]]>
<![CDATA[Rokki Manurung]]>;
<![CDATA[Septiani Silitonga]]>;
<![CDATA[Yohanes Hutahaean]]>;
<![CDATA[Charles S.P Manurung]]>;
<![CDATA[Parulian Siagian]]>;
<![CDATA[Richard A M Napitupulu]]>
<![CDATA[ SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 2 (2020): Edisi Februari 2020 ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan ]]>
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DOI: 10.36655/sprocket.v1i2.185
<![CDATA[The success of the welding process is the occurrence of good and strong welding joints that are inseparable from the influence of the heat source. The problem that often occurs when welding is a distortion that can trigger the initial formation of cracks. By predicting the level of welding distortion beforehand, engineers can also reduce the amount of rework by reverse design and distortion margins. That is why with current technological developments it is possible to carry out simulations based on analytical solutions that are implemented through the use of software, where in this study the authors sought to model the temperature of the HAZ region in the Butt Joint process using MSC Marc Mentat. The simulation results show that the heat source is very determining the occurrence of distortion and pressure on the surface. This is caused by the phenomenon of melting and shrinkage that occurs in a short time.]]>
