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Turbo : Jurnal Program Studi Teknik Mesin
Published by Universitas Muhammadiyah Metro
ISSN : 23016663     EISSN : 2477250X     DOI : https://doi.org/10.24127
Core Subject : Engineering,
Mechanical Engineering
TURBO ISSN (print version) 2301-6663 & ISSN (online version) 2477-250X is a peer-reviewed journal that publishes scientific articles from the disciplines of mechanical engineering, which includes the field of study (peer) material, production and manufacturing, construction and energy conversion. Articles published in the journal Mechanical include results of original scientific research (original), and a scientific review article (review). Mechanical journal published by the Department of Mechanical Engineering, Faculty of Engineering, University Muhammadiyah of Metro for publishing two periods a year, in June and December with the number of articles 14-20 per year . Editors receive manuscripts in mechanical engineering from various academics, researchers and industry practitioners.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 509 Documents
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Evaluasi desain sudu turbin gas model S-20 tipe aksial menggunakan CFD Fatkur Rachmanu
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 1 (2020): Jurnal TURBO
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1051.52 KB) | DOI: 10.24127/trb.v9i1.1188

Abstract

In the design of a gas turbine as a power plant, the turbine manufacturer always makes a redesign for improvement from the previous design (continuous improvement). This study discusses the redesign of a gas turbine for S-20 model power plant. The use of software that has been used to get more tangible from the basic theory of a gas turbine blade in this case is the average speed triangle. Can be seen a change in the flow of gas that enters the rotor and stator to be absorbed by the kinetic energy of the gas that hit the blade to produce a larger number of shaft paths. The results of this design produce for enthalpy in high pressure turbine is 1,211,129 J/kg, with mechanical power is 2,747 Watt. Produce view of shape is ellipse on leading edge and trailing edge and choice of twist turbine blade stating from hub, meridian and tip. In this research flow of gas depend on rotor turbine blade position and rotating speed of rotor. Besides that velocity of gas, gas mass, high of stator and rotor blade.Keywords: Blade, turbine, gas, Saturn, Computational Fluid Dynamic (CFD).
Pemanfaatan material fasa berubah untuk mempertahankan kesegaran sayuran Muhammad Irsyad; Natal Andreas H L Tobing; M Dyan Susila
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1295

Abstract

Indonesia is an agricultural country with a tropical climate. One of the many agricultural products in Indonesia is vegetables. Handling of vegetables after harvesting is important because the decrease in product quality can reach up to 50%. This decrease in quality is the result of metabolic processes such as transpiration and respiration that occur in post-harvest vegetables. The respiration rate of vegetables cannot be stopped but can be slowed down by lowering the temperature, so that the freshness of the vegetables can last longer. One method of maintaining the temperature of vegetables is storage in a cool box with cooling media. Phase change material (PCM) is an alternative cooling medium that utilizes latent heat in thermal energy storage. Paraffin is a PCM that can be used for this application. Paraffin has a freezing and melting temperature range that can be adjusted according to your needs, namely by mixing liquid paraffin and solid paraffin. This study used mixed paraffin with a liquid-solid paraffin ratio of 98:2 mass basis. This mixture has a melting temperature of 6o C until 13 C and is close to the optimal temperature for storing vegetables, which is 5o C. In this study, testing was also carried out using water as a comparison. The test results show that ice can make vegetables last longer in cold conditions, namely that it is able to maintain the vegetable temperature below 20o C for 11 hours, while paraffin only lasts 2 hours. The physical condition of the vegetables that are cooled with ice in the packing changes color and becomes watery because the water in the vegetables is condensed. Meanwhile, on cooling with paraffin it is physically fresher.Keywords: PCM, paraffin, cool box, fresh vegetable storage
Laptop cooling numerical simulation using Computational Fluid Dynamics Syamsuri Syamsuri; ZA Fairuz; KDT Alfonsus
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1290

Abstract

Laptop’s cooling solution is very important. In some cases, due to poor cooling an over heat on the mother board, main chip, and other components occurs, so that the laptop is quickly broken. Therefore it is necessary to know the temperature distribution so that over heat can be overcome. One of the methods to determine the temperature distribution in this final project is a flow simulation, using CFD (Computational Fluid Dynamics), 3D method with the variation if different air flow velocity, i.e. 5 m/s, 10 m/s, and 15 m/s. The higher the air flow rate, the higher the cooling occurs. From the temperature contours it is shown that the hot temperature is built up on the back of the heat sink. The results of the validation of this study and previous studies obtained an error that occurred was around 4%.Keywords: CFD, variation of air flow velocity, laptop.
Deteksi kavitasi menggunakan linear discriminant analysis pada pompa sentrifugal Berli Paripurna Kamiel; Yusuf Ahmad; Krisdiyanto Krisdiyanto
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1326

Abstract

Cavitation is a phenomenon that often occurs in the centrifugal pumps. The impact of cavitation is a decrease in pump performance which will affect the ongoing production process in the industries. It is important to have a method to detect the phenomenon of cavitation early. The vibration signal is a parameter that is often used in detecting cavitation or other faulty components. One of the methods is based on the pattern recognition i.e. machine learning. Linear Discriminant Analysis (LDA) is a machine learning algorithm that has the advantage of reducing the parameters used into low dimensions without reducing the accuracy of their classification. The study proposes LDA to classify normal conditions, initial cavitation, intermediate cavitation and severe cavitation. The recording of the vibration signal is taken using the an accelerometer mounted on the inlet of the centrifugal pump. The vibration signal is then extracted using 10 statistic parameters of time domain as the LDA feature selection, namely mean, RMS, standard deviation, kurtosis, skewness, crest factor, clearance factor, shape factor, variance and peak value. The results shows that the LDA classifier can detect and classify cavitation conditions with an accuracy rate of 98.8% on training and 99.6% on testing. The shape factor, kurtosis, skewness and RMS parameters are a combination of parameters that have a large contribution to the classifier to detect and classify cavitation conditions.Keywords: Linear Discriminant Analysis (LDA), cavitation, centrifugal pump, statistical parameter
Brake spesific fuel consumption, brake thermal efficiensy, dan emisi gas buang mesin bensin EFI dengan sistem EGR berbahan bakar premium dan butanol Sanjaya, Firman Lukman; Syaiful, Syaiful; Syarifudin, Syarifudin
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1178

Abstract

The increase in vehicle volume causes an increase in the use of gasoline fuel and air pollution. Therefore, alternative fuels such as butanol are one of the solutions to overcome this problem. Butanol has a high octane value and oxygen content so that the combustion process is more perfect and reduces exhaust emissions. The use of butanol is expected to improve engine performance and reduce exhaust emissions. The purpose of this study was to observe the effect of butanol on gasoline engines with the EGR system on Brake Specific Fuel Consumption (BSFC), Brake Thermal Efficiency (BTE), and exhaust emissions. Testing uses a Toyota Kijang 7K gasoline engine with an EFI fuel system. The percentage of butanol used is 5%, 10%, 15% in the condition without EGR, hot EGR, and cold EGR. The test is carried out at a fixed engine rotation speed of 2500 rpm. Retrieval of engine performance data using a dynamometer while the exhaust emissions using the GA analyzer. The test results showed the addition of butanol increased the BSFC value by 0.9% and BTE by 2%. However, a decrease occurred in CO emissions by 74.2% and HC by 33.6% compared to pure premium. The use of hot EGR decreased BSFC by 19.3% and BTE by 23.9%. The highest CO emissions were 3.23% while the highest HC emissions of 259 ppm occurred in the use of cold EGR.Keywords : butanol, EGR, BSFC, BTE, exhaust gas emissions
Kaji teoritis EMS (Engine Management System) dengan variasi temperatur air pendingin dan beban kerja pada kondisi stasioner pada kendaraan Toyota Avanza Angga Wahyu Pramayudha; Gunarko Gunarko; Ardyanto Darmanto; F A Widiharsa
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1180

Abstract

EMS is a control system on the engine to regulate the proper mixing of air and fuel, accurate ignition timing, and control of other systems on the engine, according to the conditions and workload of the vehicle. The EMS component consists of sensors, ECU, and actuator. Engine control is fully regulated by the ECU. After getting data from the sensor, the ECU sensor will signal the actuator to control the engine, so that the work of the engine can be controlled according to the conditions of the engine. The effect of the cooling water temperature sensor is very large at stationary (Idle Speed Control/ISC). This research method is carried out by varying the temperature of cooling water (Engine Coolant Temperature/ECT) to get the mass of gasoline, air mass, air fuel ratio, engine speed, ignition angle, and gasoline consumption at each ISC load. The results of the research and data processing show that gasoline consumption will decrease every time the cooling water temperature increases. The AC (Air Conditioner) load ranges from 1,123 x 10-2 to 2,164 x 10-2 kg/hour, the power steering load ranges from 6,311 x 10-3 to 9,482 x 10-3 kg/hour, the electrical load ranges from 6,608 x 10-3 to 7,876 x 10-3 kg/hour and without load ranges from 6,024 x 10-3 to 7,920 x 10-3kg/hour. From these data it can be concluded that the effect of the ECT sensor is very large on engine performance at stationary rotation (ISC).Keywords: Sensor, ECU, Actuator.
Rancang bangun alat two phase flow (air-udara) sebagai media pembelajaran dan praktikum mahasiswa skala laboratorium Gunarto, Gunarto; Waspodo, Waspodo; Irawan, Doddy; Julianto, Eko
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1298

Abstract

The purpose of this research is to produce a two-phase flow tool as a learning media and practicum based on the engineering approach (BPRT) to increase student motivation, abilities, skills, and understanding of two-phase flow courses. The research stages were carried out by designing the design and manufacturing or assembling of two-phase flow toolswith horizontal and vertical orientations into a complete unit, as well as testing the tools so that they can be used for practicum. Data collection and retrieval were adjusted to the test instruments. The results of this research is a learning media tool and practicum to test the characteristics, determine or look for a pressure drop, and a two-phase flow pattern. This two-phase flow device can operate in horizontal and vertical pipe test sections with minimum water and air flow rate of 0.00017 m3/s or 600 liters/hour while a maximum of 0.0005 m3/s or 1800 liters/hour. The minimum pressure allowed on this tool is 0.3 bar and the maximum is 0.83 bar.Keywords: two phase flow, pressure drop, flow pattern, practicum
Pengaruh jarak nozzle penyemprot terhadap kemampukerasan baja komersil dengan metode jominy test Yusuf Yusuf; Asep Ruchiyat; Muh Anhar
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1304

Abstract

Steel is the material most widely used in the industry. To avoid wear and tear on steel, it is necessary to do heat treatment to improve the mechanical properties of the steel according to its application in the field. The increase in hardenability in metals can be determined by doing a hardenability test, namely the Jominy test method. The Jominy test is a method to determine the hardness value of metal using ASTM standards. This research was conducted with varying the distance of the nozzle of the sprayer to the lower end of the specimen, namely 10 mm, 12.5 mm, and 14 mm with a long spraying time of 15 minutes. The heat treatment process at temperature of 780oC and 90 minutes holding time. The averagehardness value of specimen number one (10 mm spraying distance) is 45.43 kgf, specimen number two (12.5 mm spraying distance) is 45.68 kgf, and specimen number three (14 mm spraying distance) is 44.31 kgf. The highest hardness value was specimen number two, there was an increase of 1.87 kgf (4.02%), according to ASTM standards where the spraying distance was 12.5 mm.Keywords: Steel, spraying distance, Jominy test.
Prototipe smart home berbasis mikrokontroler arduino dan smart phone Mafruddin Mafruddin; Sulis Dri Handono; Avin Darma Irawan
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1334

Abstract

In this study, a home electrical control system and electronic components were  designed using an Arduino Uno R3 microcontroller equipped with a motion sensor and connected to a Bluetooth module and a GSM (Global System for Mobile Communications) SIM (Subscriber Identification Module) module. In addition, the Smart Home prototype will also be equipped with earthquake detection sensors, fire sensors and sensors as soon as possible to deal with early earthquakes and fire detection. The purpose of research is to see the performance of the smart home system. The research method used is a research method with methods and making and testing Smart home prototypes. Testing is done by running the system to see the performance of the system being made. From the research results it can be ignored that the electrical control system and electronic components made using the Arduino Uno R3 microcontroller and the Bluetooth module and the GSM SIM module can work properly, the electrical system and electronic components can be turned on and off using a GSM SIM and Bluetooth module. The security system uses motion sensors and a GSM SIM module to work properly, the system can send SMS (Short Message Service) notifications to homeowners if human movement. The earthquake and fire detection sensor system in the smart home prototype can work properly, the system can turn on notification alarms when an earthquake and wait for fire and as soon as possible.Keywords: Mikrokontroler arduino, Smart phone, Smart home.
Analisa kekuatan mekanik pengaruh perendaman dan penekanan pada komposit berbahan serat mengkuang Sutrisno Sutrisno; Azmal Azmal
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1208

Abstract

This study aims to determine the effect of mechanical properties, namely the tensile  strength, bending and impact of the composite fiber mengkuang (pandanus artocarpus griff) without immersion and with immersion of 5% NaOH with an immersion time of 1 hour. Then the blending and casting process is carried out to form a composite material with 20% fiber and 80% resin binder with a catalyst content of 1% and pressurized with press variations of 5 kg, 10 kg, and 15 kg. The results of the blending and casting process are made according to the testing standard and then testing the mechanical properties. The results of tensile, bending and impact testing showed that for 1 hour immersion with a pressure of 15 kg the highest value was tensile strength of 13.75 N / mm2, bending strength of 33.61 N / mm2 and impact strength of 152.32 J / mm2. Whereas the form of the composite fiber of the  decomposed fiber is the binder and the fiber breaks evenly at the same point and the fiber is not pulled from the metric.Keywords: composites, resins, mono fiber, mechanical properties

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