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INDONESIA
Jurnal Teknik Mesin
Published by Politeknik Negeri Padang
ISSN : 18298958     EISSN : 26555670     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Teknik Mesin adalah sebuah jurnal peer review yang didedikasikan untuk publikasi hasil penelitian yang berkualitas dalam bidang teknik mesin.
Arjuna Subject : -
Articles 204 Documents
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Pengaruh Catalytic Converter Dari Bahan Kuningan Dengan Ketebalan 0,3 mm Terhadap Emisi Gas Buang Kendaraan Pada Motor Honda Supra 2015 Budiyono Budiyono
Jurnal Teknik Mesin Vol 13 No 1 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.1.356

Abstract

There are two methods to reduce exhaust emissions in a motorized vehicle, namely by improving fuel and motorbike technology in such a way that better combustion occurs and produces lower emissions and by the addition of exhaust emission control devices or devices. Catalytic Converter is a device used as an exhaust gas emission control that is placed after the exhaust manifold on a motor vehicle exhaust system. The purpose of this study was to determine how the influence of the use of catalytic converters of brass material to reduce CO and HC gas levels in motor vehicles. Tests carried out using a gas analyzer to determine the value of CO and HC concentrations. Exhaust gas testing is carried out in two stages, namely exhaust emission test with standard exhaust and exhaust emission test with catalytic converter with variations of engine speed 1500 rpm, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, 4000 rpm. From the results of the study it was found that the influence of the use of catalytic converters of brass with a thickness of 0.3 mm with the fin model experienced a decrease in the level of exhaust gas emissions most effectively at 1500 rpm engine speed ie CO value decreased 1.82% from 3.96% to 2.14% and HC values ​​decreased by 4,412 ppm from 9,999 ppm down to 5,587 ppm. So motor vehicles using a catalytic converter made of brass with a thickness of 0.3 mm will be able to reduce CO exhaust emissions by 2.14% and HC by 3.96%
Konsep Smart Building Pada Kenyamanan Termal di Laboratorium Teknik Anastasia Febiyani
Jurnal Teknik Mesin Vol 13 No 1 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.1.359

Abstract

Engineering Laboratory is a place where students can learn the theory and then practicing of machines operate. Teaching room should be made as comfortabel as possible so can improve students. Room condition whereas there are practicum machines makes the room hotter.. Inadequate room capacity makes students uncomfortabel with the conditions of the practicum. The focus in this study is to examine the thermal comfort obtained by students, measurements of temperature and humidity. The method used to calculate the temperature index by calculating the Predicted Mean Vote Index (PMV), Predicted Dissatisfied (PPD), and Heat Stress Index (HSI). Result for This calculation is then used as a reference in the improvement analysis. The results obtained from the PMV calculation are 2.11 PPD 81.67%. This calculation used as a reference in the improvement analysis.
Pembuatan Dan Pengujian Mesin Bending Rotary Baja Untuk Aplikasi Stand Pot Bunga Diameter 8 dan 10 Inch Ruzita Sumiati; Genta Ramadeto; Rakiman Rakiman; Fardinal Fardinal
Jurnal Teknik Mesin Vol 13 No 1 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.1.363

Abstract

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
Optimalisasi Sistem Perawatan dan Perbaikan Mesin Vertical Mill di PT. Semen Padang Wahmin Rais; Afrizul Evendi; Adriansyah Adriansyah; Darman Dapersal Dinar
Jurnal Teknik Mesin Vol 13 No 1 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.1.366

Abstract

Vertical Mill is one of the main equipment in the Indarung IV factory PT. Semen Padang. This Vertical Mill is used to grind / crush the main ingredients of making cement such as Limestone, Silica stone, Clay, and Iron sand. Milling of this material is done with the help of a tool called a Roller Tire and grinding table. So that the Tire Tire and grinding table always work as expected, the Roller Tire and grinding table must be maintained and repaired continuously and planned. Major damage that is often encountered is the occurrence of wear and tear on the Tire Roller and the grinding roller. Countermeasures by adding meat to the Tire Roller and grinding table using welding. With the maintenance and repairs are well scheduled, then we can avoid the causes of a damage from the beginning.
Uji Eksperimental Pengaruh Panjang Chord Sudu Terhadap Kinerja Turbin Angin Sumbu Vertikal Eva Hertnacahyani Herraprastanti; Muhamad Najib Mubarok; Sarip Sarip; Hendri Suryanto
Jurnal Teknik Mesin Vol 13 No 2 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.2.390

Abstract

Indonesia's petroleum production continues to decline while energy demand continues to grow. As a result, there was an increase in imports of crude oil and imports of fuel oil products. The government issued a number of policies to reduce fuel use. One of the efforts is to manage renewable energy power plants such as wind energy. The wind turbine is a windmill that is used to generate electricity. The basic principle of working of a wind turbine is to convert wind energy into mechanical energy at the mill, then the rotation of the mill is used to rotate the generator which will produce electricity. One of the things that need to be considered in designing wind turbine blades is the size (radius of the rotor), airfoil section, chord length, and blade pitch angle. The blade chord length is the length of the straight line connecting the front and rear edges of the turbine blade. The purpose of this study was to determine the effect of blade chord length on the performance of a vertical axis wind turbine, including shaft rotation, wind power, generator power, rotor power, torque, Tip Speed ​​Ratio (TSR) and power coefficient. This research was conducted using a vertical axis wind turbine, with 4 L-type blades made of 60 mm thick aluminum plate, with variations in chord lengths of 140 mm, 170 mm, and 200 mm. From the results of the tests that have been carried out, it can be concluded that the chord length affects shaft rotation, wind power, generator power, rotor power, torque, Tip Speed ​​Ratio (TSR) and power coefficient.
Purwarupa Pembangkit Listrik Tenaga Ombak Dengan Konsep Oscillating Water Coloumn (Skala Laboratorium) Yeddid Yonatan Eka Darma; I.G.N.A Satria Prasetya D.Y; Heri Inprasetyobudi; Moh Nurpambudi Hidayat; Diky Nurwahyudi
Jurnal Teknik Mesin Vol 13 No 2 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.2.408

Abstract

Electricity energy demands for peoples near the sea are same high as people in the city, but sometimes electricity in coastal residence are nearly forgotten. In that case we need an alternative energy source for electricity generation using friendly environmental and renewable energy to maintain the availability of electrical energy. One of the energy alternative is sea wave power such as Oscillating Water Column (OWC) system. The Oscillating Water Column system have three main components, such as the chamber, air turbine (wells turbine) and generator. The chamber function is a place for oscillation between water and air, then the function of water turbine (wells turbine) is to capture energy (air flow) that will be used to rotate the generator, that producing electrical energy. This turbine is 22 cm in diameter and will use the NACA0012 airfoil. This research was conducted to design an oscillating water column on a laboratory scale. This research is expected to be the beginning of renewable energy development sources and as the alternative energy source for the community in Banyuwangi.
Analisa Perbandingan Performansi AC SPLIT Konvensional Dengan AC SPLIT Tenaga Surya Yudhy Kurniawan
Jurnal Teknik Mesin Vol 14 No 1 (2021): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.14.1.409

Abstract

Currently, the world's energi needs are still dominated by depleting fossil fuels, where the largest consumption produced from these fossils is electrical energi. For tropical country conditions, on average, every house and in city buildings use split AC as a tool to condition the room so that it feels comfortable for its residents. Where about 60% utilize electrical energi. In this study, split AC uses solar power as an alternative to electrical energi by using a solar photovoltage (PV) system as a medium for absorbing solar radiation to be converted into electrical energi in split AC. The goal is that the use of solar radiation is able to reduce the use of electricity from PLN, which so far requires a large amount of money. The research method begins by making a model of a device that is modified by an electric panel on a split AC connected to an inverter to convert DC to AC current from the PV cell. From the use of solar cells as electrical energi then the test results are compared with conventional split AC. The results obtained from the conventional split AC test can be seen that the efficiency is 85% while the solar-powered split AC has an efficiency of 73%, but for the use of electrical power that operates for 2 hours on a solar-powered split AC, it is more efficient with a power of 376 Wh per day.
Pengaruh Temperatur PWHT Terhadap Struktur Mikro, Uji Kekerasan Dan Uji Tarik Pada Proses Pengelasan Gas Metal Arc Welding (GMAW) Aluminium 5083 Adhi Novianto; Ipick Setiawan; Agus Pramono
Jurnal Teknik Mesin Vol 13 No 2 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.2.415

Abstract

PWHT (Post Weld Heat Treatment) is one way to improve microstructure changes and can increase the tensile strength and hardness of the welding process. The purpose of this study was to determine changes in microstructure, hardness values, and tensile test values ​​with temperature variations of PWHT and without PWHT. The finished metal is then given a PWHT temperature variation on aluminum alloy 5083 with a temperature variation of 150 ° C, 250 ° C, 350 ° C with a heating rate of 100 ° C and heating of 80 ° C for 1 hour and a holding time of 1 hour according to The variation that has been set is continued with cooling 30 ° C for 8 hours of natural cooling in the chamber furnace machine. The results of this study indicate that changes in the microstructure due to the higher temperature of the PWHT process will reduce the concentration of porosity formed, which has a correlation with the resulting tensile strength. For the results of the tensile strength from the process without PWHT using temperature variations, the PWHT process has increased for that by doing this PWHT process greatly affects the tensile strength. The highest tensile strength is at the PWHT temperature variation of 350 ° C (263.65 MPa) compared to specimens without PWHT (253.52 MPa). Meanwhile, the hardness value is not very influential by using temperature variations of PWHT or without PWHT, the hardness value using temperature variations of PWHT 150 and without PWHT in the weld metal area (74.4 HV).
Pengaruh Temperatur Dan Waktu Penahanan Terhadap Sifat Mekanik Dan Struktur Mikro Pada Baja Karbon Rendah Rhaka Qudzsy Wening Praja; Iman Saefulloh; Agus Pramono
Jurnal Teknik Mesin Vol 13 No 2 (2020): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.13.2.418

Abstract

Basically the characteristic of steel products that is widely used in the construction process is structural steel. In order to compete with structural steel foreign-made, a standards compliance is a minimum requirement that must be done. To meet the JIS G 3302 grade SGC 400 standard, the results of the cold rolled process and continued with Cyclic Spheroidizing on 0,11% carbon steel, resulted in an elongation value that met the standards, but the yield strength and tensile strength were below standard. So that a heat treatment process substitution is needed so that 0,11% carbon steel can meet the JIS G 3302 SGC 400 standards. The aim of this research is to determine the effect of temperature and holding time with the cyclic treatment method on the microstructure and mechanical properties of 0,11 steel % carbon. Also in this research , 0,11% carbon steel was subjected to a heat treatment process with a 3-cyclic method at temperatures of 575, 625, 675°C, then cooled in air blower then given a holding time of 4, 6, 8 minutes. Then 0,11% carbon steel was subjected to tensile test, Vickers hardness test and scanning electron microscope as well as energy dispersive spectroscopy-Mapping. From the temperature variation of 625°C with the cooling medium of the blower produces mechanical properties that meet the JIS G 3302 SGC 400 standard.
Analisa Pengaruh Bentuk Impingement Plate Terhadap Perpindahan Panas Pada Zona Desuperheating High Pressure Heater Arrad Ghani Safitra
Jurnal Teknik Mesin Vol 14 No 1 (2021): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.14.1.420

Abstract

High Pressure Heater (HPH) are tools that used to improve the efficiency of boiler. HPH utilizes hot steam from turbine extraction as heating medium before entering into the economizer in boiler. In the industry, High Pressure Heater is one of the tools that includes a heat exchanger. To prevent from several problems, some of the industries applying a plate that called impingement plate. This plate placed on the shell side Steam inlet of High Pressure Heater with the function to protect the tube facing the directly the shell side input flow. To determine the effect of adding impingement plates on heat transfer that occurs in the desuperheating zone, a simulation was performed using CFD software with variations of conventional flat plates, 4 plates, and inclined plates. From the simulation results using CFD software it is known that after the addition of the impingement plate, the largest heat transfer value in the desuperheating zone is found in the inclined plate geometry followed by the 4 plate geometry and conventional flat plate, with a q value of 9.54 MW; 7.93 MW; and 4.16 MW, respectively. Then for the inclined plate geometry pressure drop value has a small pressure drop plaing value, which is equal to 30.04 kPa.

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