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<![CDATA[Force Reduction of Circular Cylinder using Square Disturbance Body at 600 Angle by 2D Numerical Simulation Unsteady-RANS ]]>
<![CDATA[Putra, Meiki Eru]]>;
<![CDATA[Rina, Rina]]>;
<![CDATA[Nofriyandi, R]]>;
<![CDATA[Sumiati, Ruzita]]>
<![CDATA[ - ]]>
Publisher : <![CDATA[Kopertis Wilayah X ]]>
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<![CDATA[Drag is an aerodynamic force that appears when the flow past the bluff body circular cylinder. Drag strongly influenced by the flow separation point. One of the ways reducing the drag force that is to control the flow by placing the disturbance body on the upstream side at a certain angle. Previous research has found at 60º angle of flow separation is faster than a single cylinder that produced greater drag. Therefore, this research was conducted to reduce the drag force on the corner with disturbance dimension variation. This research was carried out numerically using a FLUENT 6.3.26 CFD software in 2D unsteady viscous-RANS models Turbulence Model-Shear-Stress Transport (SST) k-Ï in a narrow channel. The geometry is simulated in a circular cylinder as the main body and the square cylinder as a disturbance body being placed in front of the main body by 0.16 s/D ratio. Dimensions of disturbance body varied at (s) 0,1; 0,2; 0,3; 0,4 dan 0,5 mm with a gap (δ=0,4mm). Reynolds number based on the diameter of the cylinder, ie ReD 2,32x104. The simulation results show that the transition flow on shifting 60º SDB angle for all SDB dimensional variations do not produce turbulent. The best of drag force reduction in this configuration occurs on a cylinder at 0.2 mm disturbance dimensions is 48%.]]>
<![CDATA[ANALISA MASALAH COOLING SYSTEM ENGINE 3306 UNIT D6D DOZER CATERPILLAR ]]>
<![CDATA[Yogi Kogama]]>;
<![CDATA[Ghandy Junne Putra]]>;
<![CDATA[Ruzita Sumiati]]>;
<![CDATA[Yanziwar Yanziwar]]>
<![CDATA[ Jurnal Teknik Mesin Vol 3 No 1 (2020): Vol.3 NO 1. (2020) Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[P3M- Politeknik Negeri Kupang ]]>
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DOI: 10.32511/jtm.v3i1.707
<![CDATA[Cooling system merupakan salah satu sistem yang mempengaruhi performance dari engine. Cooling system berfungsi untuk menjaga kondisi temperatur engine agar tetap normal, berkisar antara 1920F (890C). Untuk mengidentifikasi gejala kerusakan yang terjadi pada komponen cooling system yang menyebabkan over heating yaitu dengan cara troubleshooting cooling system. Terjadinya masalah over heating pada Engine 3306 Dozer Caterpillar, ditandai dengan adanya pergerakan jarum temperature engine yang bergerak menuju batasan maksimum temperature engine. Untuk mengetahui penyebab kerusakan, maka dilakukanlah 8 langkah troubleshooting. Berdasarkan hasil troubleshooting, ditemukan bahwa kurangnya coolant pada radiator dan setelah dilanjutkan dengan pembongkaran cooling system engine ditemukan rusaknya thermostat dalam keadaan tertutup dan retaknya liner engine. Untuk memperbaiki agar masalah pada cooling system kembali normal , maka dilakukanlah penggantian thermostat dan liner dengan yang baru. Agar masalah tidak terjadi lagi maka lakukanlah perawatan secara berkala pada unit maupun engine dan terutama gunakanlah coolant conditioner pada engine agar cooling system pada engine bekerja dengan baik]]>
<![CDATA[Pengujian Turbin Angin Savonius Tipe U Tiga Sudu Di Lokasi Pantai Air Tawar Padang ]]>
<![CDATA[Ruzita Sumiati]]>
<![CDATA[ Jurnal Teknik Mesin Vol 9 No 1 (2012): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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<![CDATA[Sumber energy terbesar yang dimanfaatkan saat ini masih dominan berasal dari fossil. Sumber energy fossil bersifat non renewable sehingga lama kelamaan akan habis dan energy fosil juga tidak ramah lingkungan karena menghasikan gas CO2 . Oleh karena itu saat ini sangat banyak penelitian dilakukan tentang energi terbarukan agar mendapatkan sumber energy baru yang memiliki dampak positif bagi lingkungan dan bersifat renewable. Salah satu sumber energi terbarukan yang ramah lingkungan dan mudah untuk didapat adalah energi angin. Penelitian ini membahas tentang pemanfaatan energy angin sebagai penghasil listrik dengan menggunakan turbin angin savonius. Tujuan yang hendak dicapai adalah mengetahui unjuk kerja turbin angin savonius tipe U tiga sudu melalui pengujian terhadap variable ukur yaitu kecepatan angin, kecepatan putar rotor dan daya yang dihasilkan alternator. Lokasi pengujian di pantai Air Tawar Padang. Dari hasil pengujian didapatkan putaran maksimum rotor adalah 196 rpm pada kecepatan angin 7,9m/s, besar daya 126 watt. Untuk putaran minimum rotor 53 rpm pada kecepatan angin 2,7 m/s tidak mampu menghasilkan daya karena putaran pada poros alternator setelah melewati system transmisi menjadi 156 rpm sehingga tidak mampu membangkitkan listrik, dimana spesifikasi alternator yang dipakai baru mampu menghasilkan listrik jika putaran besar dari 300rpm.]]>
<![CDATA[Pengukuran Objek 2 Dimensi Dengan Menggunakan Kamera Berbasis LabVIEW ]]>
<![CDATA[Khairul Amri]]>;
<![CDATA[Ruzita Sumiati]]>
<![CDATA[ Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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<![CDATA[Quality Control (QC) is one of the most important components in the manufacturing process. The aim is to determine whether a product is feasible to market. One aspect of QC is the size / dimension of the object to be made. If the size is still within the range of tolerance, then it has passed the QC in terms of size, but if not then it includes a failed product. The problem encountered is that it takes a long time to take measurements, especially objects in the third dimension where each part is different as microdrill, zipper etc. To overcome this weakness, a CCD camera is used as a sensor to record images and then use LabVIEW software to analyze the size of the recorded image. This is a preliminary study so that it is only done for objects with two dimensions with square and circular shapes. From the research that has been done, the measurement with the camera gives results that are almost the same as the use of calipers where the standard deviation fluctuates from 0.3 to 23.8 for circles and 0.54 to 32.05 for squares. Furthermore, the time needed to do one measurement process with the camera ranges from 201 ms to 338 ms whereas using the calipers takes 3 to 5s]]>
<![CDATA[Alat Pengering Kerupuk Palembang Dengan Menggunakan Gas LPG ]]>
<![CDATA[Ridho Pratama Fajri]]>;
<![CDATA[Maimuzar Maimuzar]]>;
<![CDATA[Ruzita Sumiati]]>
<![CDATA[ Jurnal Teknik Mesin Vol 10 No 2 (2017): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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<![CDATA[This cracker dryer is made considering that there are still many cracker industries that use solar thermal energy directly to dry raw crackers before the frying process, so that the cracker production results will decrease due to inefficient drying process, therefore all obstacles are always experienced when using energy sunlight can be overcome by using a cracker dryer using gas (LPG). This cracker dryer has dimensions of length 550 mm x width of 450 mm x height of 1000 mm and size of drying rack with a length of 500 mm x width of 400 mm x height of 25 mm. This tool has 4 drying racks with a capacity of each rack 1.5 kg. This dryer uses the principle of convection that is utilizing heat energy generated from the heat of the fire produced through a gas-using stove (LPG), the radiated fire produces heat that enters the drying cabinet. Hot air is locked in a drying room, so that the heat can help the drying process of crackers]]>
<![CDATA[Pengujian Kincir Air Hidrokinetik Undershoot Di Irigasi Limau Manis Padang ]]>
<![CDATA[Ruzita Sumiati]]>;
<![CDATA[Fardinal Fardinal]]>;
<![CDATA[Nusyirwan Nusyirwan]]>;
<![CDATA[Adriansyah Adriansyah]]>;
<![CDATA[Robby Novrizal]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2019): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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<![CDATA[The power produced by a hydrokinetic turbine depends on the interaction between the rotor and water. Therefore, the optimal rotor geometry must be designed and built to capture maximum water energy and convert it into usable energy. Hydropower is one of the potential renewable energy that can contribute to the need for electricity. Hydropower generator is pollution free so this generator can answer environmental problems and the availability of renewable energy sources. The aim to be achieved in this study is to produce a turbine hydropower with good performance if it operates on an irrigation channel and is applied as a power plant. This research was developed to get the right specifications for the use of hydrokinetic turbines in the irrigation canal area. There are several methods carried out in the design of hydrokenetic turbines, namely by designing blades based on the shape of water flow, repairing the transmission system, and selecting the right generator. In this study, we tested the sweet lemon irrigate applied and tested in the area of Padang Sumbar Sweet Limes Pauh, the results obtained were that the turbine can produce power of about 12.6 watts.]]>
<![CDATA[Pembuatan Simulator Power Steering Beserta Troubleshooting ]]>
<![CDATA[Riezky Idvi Alfitra]]>;
<![CDATA[Ruzita Sumiati]]>;
<![CDATA[Nusyirwan Nusyirwan]]>;
<![CDATA[Adriansyah Adriansyah]]>
<![CDATA[ Jurnal Teknik Mesin Vol 12 No 1 (2019): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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<![CDATA[In this Final Project report, a little is explained about the parts of power steering and how to make the vehicle comfortable, especially when the vehicle turns. Stability and comfort in driving a vehicle is very important and desirable for all motorists, how it can be obtained. Power steering makes the driver feel light in controlling his vehicle especially when turning. So power steering is one of the things that is very important to get driving comfort. Therefore maintenance of the power steering is also important to be able to help realize stability and comfort in driving. In addition to the care also considered in the use of spare parts must be in accordance with the standards used in the vehicle]]>
<![CDATA[Pembuatan Dan Pengujian Mesin Bending Rotary Baja Untuk Aplikasi Stand Pot Bunga Diameter 8 dan 10 Inch ]]>
<![CDATA[Ruzita Sumiati]]>;
<![CDATA[Genta Ramadeto]]>;
<![CDATA[Rakiman Rakiman]]>;
<![CDATA[Fardinal Fardinal]]>
<![CDATA[ Jurnal Teknik Mesin Vol 13 No 1 (2020): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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DOI: 10.30630/jtm.13.1.363
<![CDATA[In this day and age people decorate homes with flower pots and many models of flower pot place creations. Usually the place to put flower pots in the form of a circle and to make a circular iron is made manually requires energy and a long time. A bending machine is needed to make concrete iron circle creations. The aim of this research is to produce a rotary bending machine that is able to work efficiently in forming a concrete steel circle. The method used in this study is a practical method that is doing machine design and continued with the manufacture and field testing. The working principle of this machine is to use a motor that functions to move the Gearbox and continue the rotation to the shaft, then the shaft rotates and the bending mall rotates and makes the steel concrete come round and circular. The conclusion is (a). This concrete steel rotary bending machine has dimensions of 550 mm x 550 mm x 1000 mm with an electric motor drive power source (b). The results of the bending process using a concrete steel rotary bending machine are far more efficient than doing manual bending]]>
<![CDATA[Modifikasi Mesin Pengupas Kulit Pinang Kering ]]>
<![CDATA[Fathir Alqodri]]>;
<![CDATA[Ruzita Sumiati]]>;
<![CDATA[Rakiman Rakiman]]>;
<![CDATA[Yuli Yetri]]>;
<![CDATA[Desmarita Leni]]>
<![CDATA[ Jurnal Teknik Mesin Vol 14 No 2 (2021): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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DOI: 10.30630/jtm.14.2.559
<![CDATA[Due to the weaknesses of some existing areca peelers, some modifications were made. Modifications were made to the gear stripper, the addition of the inlet funnel, the gear stripper cover, and the exit funnel. The purpose of this modification of the design of the areca nut peeling machine is to make it easier for areca-producing farmers to peel their skin. Engine design specifications, using a 1/2 HP motor with a speed of 1500 rpm, 2-inch, and 10-inch pulleys, and a capacity of 5.16 kg/hour. The result of this modification is stated to be able to perform stripping with a large capacity. This machine is expected to be able to meet the needs of manual areca nut peelers to increase productivity.]]>
<![CDATA[Pelatihan Pembuatan Instalasi Hidroponik Mini Untuk Green House SD Bustanul Ulum Semen Padang Mendukung Program Asean Eco School 2020 ]]>
<![CDATA[Desmarita Leni]]>;
<![CDATA[Ruzita Sumiati]]>;
<![CDATA[Adriansyah Adriansyah]]>;
<![CDATA[Fardinal Fardinal]]>;
<![CDATA[Jana Hafiza]]>
<![CDATA[ ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 4 No 1 (2022): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat ]]>
Publisher : <![CDATA[Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang ]]>
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DOI: 10.24036/abdi.v4i1.174
<![CDATA[SD Bustanul Ulum Semen Padang is located on Jl. Komp. Kuranji Batu Busuk Hydropower Kel.Lambung bukit kec. Pauh. Training given to teachers and students of SD Bustanul Ulum (BU) Semen Padang to make a mini hydroponic installation so that the existing green house can be organized and can develop plant seeds. As well as fostering the spirit of elementary school students bu to care more about the environment early. And provide knowledge about vegetable cultivation techniques, organic nurseries with hydroponic systems. Training on making hydroponic installations in the school green house teaches school students can cultivate a variety of plants to green the school sd BU Semen Padang. This program has been started since SD BU Semen Padang obtained an independent adiwiyata tropy at the national level and SD BU strives to improve the quality as a school that cares & cultures the environment for the proposal of Asean Eco School candidates from 21 provinces throughout Indonesia. Solutions offered to solve the problems that occur in SD Bustanul Ulum Semen Padang by providing mini hydroponic equipment assistance, training in assembling mini hydroponic installations and providing knowledge about using the correct hydroponic equipment so that the needs of plant nurseries in the green house of SD Bustanul Ulum Semen Padang can help the stability of greening the school]]>
