cover
Contact Name
Anita Susilawati
Contact Email
anitasusilawati@lecturer.unri.ac.id
Phone
-
Journal Mail Official
jomase@isomase.org
Editorial Address
Teknik Mesin, Fakultas Teknik, Universitas Riau Kampus Bina Widya, Jl. HR. Soebrantas Km. 12,5 Panam, Pekanbaru 28293, Riau, INDONESIA
Location
Kota pekanbaru,
Riau
INDONESIA
Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Published by Universitas Riau
ISSN : 23547065     EISSN : 25276085     DOI : http://dx.doi.org/10.36842/jomase
The mission of the JOMAse is to foster free and extremely rapid scientific communication across the world wide community. The JOMAse is an original and peer review article that advance the understanding of both science and engineering and its application to the solution of challenges and complex problems in naval architecture, offshore and subsea, machines and control system, aeronautics, satellite and aerospace. The JOMAse is particularly concerned with the demonstration of applied science and innovative engineering solutions to solve specific industrial problems. Articles preferably should focus on the following aspects: new methods or theory or philosophy innovative practices, critical survey or analysis of a subject or topic, new or latest research findings and critical review or evaluation of new discoveries. Scope The JOMAse welcomes manuscript submissions from academicians, scholars, and practitioners for possible publication from all over the world that meets the general criteria of significance and educational excellence. The scope of the journal is as follows: Naval Architecture and Offshore Engineering Computational fluid dynamic and Experimental Mechanics Hydrodynamic and Aerodynamics Noise and Vibration Aeronautics and Satellite Engineering Materials and Corrosion Fluids Mechanics Engineering Stress and Structural Modeling Manufacturing and Industrial Engineering Robotics and Control Heat Transfer and Thermal Power Plant Engineering Risk and Reliability Case studies and Critical reviews
Articles 329 Documents
Design and Manufacture of Portable Screw Turbine of Pico Hydro Power Plant for Road Lighting in Rural Area Nofriadi Nofriadi; Azridjal Aziz; Rahmat Iman Mainil
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 1 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i1.330

Abstract

This study aims to design and manufacture a portable screw turbine of pico hydro power plant for road lighting in rural area. The portable screw turbine has the specifications of a turbine diameter of 23 cm, length of 1 m, number of threads of 5, shaft diameter of 6 cm and pitch of 22 cm. This screw turbine was tested by varying several turbine tilts angles, namely 15°, 30°, 45° and 60° with a flow rate used of 0.0054 m3/s. In field test was carried out at an angle of 30° with a flow rate of 0.125 m3/s. The test results show the angle of inclination of turbine affects the mechanical performance. Testing the 45° angle produced a mechanical power of 18.857 Watts with an efficiency of 35.669%. In the field testing was produced a generator power of 4 Watts. This screw turbine is expected to be another alternative as a pico-hydro scale power plant.
Study Experimental of Temperature Effect of B40 Biodiesel Engine Performance Dwiki Wisnu; Romy Romy
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 1 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i1.301

Abstract

This paper aims to determine the performance of diesel engine and increase the injection pressure by varying the fuel temperature using biodiesel B40 with a compression ratio of 21:1 and an injection pressure of 150 Bar. The parameters were calculated include, h at the orifice, the volume of fuel used, fuel consumption time, and engine rpm. In the tests carried out, it was found that variations in fuel temperature affect engine performance parameters such as effective shaft power, average effective pressure, thermal efficiency values, air fuel ratio, and specific fuel consumption. The results of the fuel temperature test with variations of 50oC, 55oC, 60oC, 65oC and 70oC. Where for the value of the largest effective shaft power at a temperature of 60oC with a value of 3.7892 kW at a load of 25,000 kg/m2 and the largest BMEP (Brake Mean Effective Pressure) at a temperature of 70oC with a value of 1275.321 N/m2, for the value of thermal efficiency, specific fuel consumption, ratio of air and the best fuel at a temperature of 65oC with a thermal efficiency value of 92.333 % at a load of 25,000 kg/m2, for a better air-fuel ratio with a value of 157,660 at a load of 5,000 kg/m2, and the smallest specific fuel consumption with value 0.00002291 kg/kJ at a load of 25,000 kg/m2.
Production Process of D-Nose Panel Components for A-350 Airplane Wings, PT Dirgantara Indonesia Brilliant Yosef Pandapotan; Dodi Sofyan Arief; Sarmaini Fridawaty; Firdaus M
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 1 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i1.276

Abstract

Airplanes are one of the most frequently used forms of transportation globally. The aircraft's ability to mobilize between continents and its near-sound speed makes it an excellent cross-country travel choice. This paper discussed the production process of D-nose panel components for A-350 airplane wing in PT. Dirgantara Indonesia. PT. Dirgantara Indonesia (Persero) or commonly referred to as PTDI, is one of the aircraft companies in Asia with core competencies in aircraft design and development, aircraft structure manufacturing, aircraft production, and aircraft services for civil and military from light and medium aircraft. The main components of the aircraft consist of the engine, propeller (power plant), fuselage, wing, tail (empennage) and landing gear. The components that make up the wing of the aircraft consist of a fuel tank, wing flap, spar, aileron, skin, ribs, stringer, wingtip, as well as external parts such as the D-nose panel. The process from beginning to end of the D-nose panel component requires several stages. Finally, this process also checks data from existing component documents and ends with the final stamp as a sign that the entire process for making the D-nose panel component has been completed.
Development of Pico-Hydro Electric Power Plant on Irrigation Canal - Case Study: Menaming Village, Indonesia Yuli Handika Hasyim; Asral Asral; Fri Murdiya
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.342

Abstract

One potential that can be utilized as a source of small-scale electrical energy is irrigation canals. The obstacle experienced to utilize irrigation canals is because irrigation canals have low flow speeds and height differences in irrigation canals. In this study, a power plant was made in an irrigation stream with a flow speed of 0.3 m/s and a height difference of only 0.3 meters. This research began with a survey of the design and manufacture of waterwheels, transmission systems, and generators. After all components are installed, the generator output voltage measurement is carried out using lamp loads of 3,6,9,12,25 and 49 Watts. From the measurements, it can be seen that as the load increases, the rotation of the wheel, voltage, and frequency will also decrease. This is due to the lack of water power so that the water is no longer able to turn the waterwheel.
Sensitivity of Mass Distribution with Respect to Pitch Motions of High-Speed Craft Sumardiono Sumardiono; I Putu Arta Wibawa
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.332

Abstract

Beside of environmental conditions, ship characteristics also greatly affect in ship behavior when operating at sea, called seakeeping ability. The shape of the hull, appendages, damping, and the weight distribution of ship are some of the factors that determine how the ship motion response occurred. This paper examines how much the pitch motion is influenced in high-speed craft due to the changing of the gyration radius. By using the strip theory method, and by taking the irregular head sea condition and a wave height of 4 meters, then the ship speed and the wave period are varied to determine the pitch motion amplitude at 3 values ​​of gyration radius: 0.2, 0.25 and 0.3 of the ship's length. The results of the study show that at higher ship speeds, the gyration radii greatly influence the pitch amplitude. As for changes in the wave period, the influence is significant at value of 5 second. From these two results, it is clear that the ship's gyration radii must be determined precisely to be able to predict an accurate pitch motion response on a high-speed craft.
Photovoltaic Solar Energy as a Power Source for Coal Waste Measurement Equipment Nurhalim Dani Ali; Feranita Feranita; Yoga Pratama; Noveri Lysbetti Marpaung; Iswadi Hasyim Rosma; Suwitno Suwitno
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.346

Abstract

Coal mines are generally located in very remote areas and so far from the reach of the power grid. This study designs a coal waste measurement device using solar energy as the power source. The parameter being measured for coal waste is its acidity level to determine water quality standards. The test results show that the photovoltaic (PV) system is capable of supplying power to the pH meter device for a duration of 24 hours with a battery capacity of 18 Ah. The total load of this system is 5.6983 Watts. With variations in load and different weather conditions such as clear, cloudy, and overcast, the solar panel voltage can effectively meet the load requirements within the voltage range of 16.7 volts to 20.9 volts.
Effect of Gear Transmission System to Vibration Test Machine Abdul Khair Junaidi; Weriono Weriono; Nazaruddin Nazaruddin; Deden MS
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.347

Abstract

This research aims to investigate the vibration analysis for equipment test of chassis. The frame model of the gear transmission vibration test is developed. The prototype of the vibration and noise testing tool was constructed for the gear transmission system. The vibration equipment test consists of three gears that function as a gear transmission. The chassis is considered to be one of the vital elements of equipment. The rotation of gears and shafts can occur the vibration. The simulation with the 3D model using ANSYS was resulted in structure analysis. The simulation was resulted in total deformation, equivalent strain, and equivalent stress where the structure of the equipment was definitely safe and had good stability.
Placement Sensor Modification of Photo Interrupter and ATDC Sensor on the Minolta Bizhub-421 Photocopy Machine Imnadir Imnadir; Rudi Z.A; Abdul Khair Junaidi; M Dalil
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.345

Abstract

Minolta photocopiers produce very good and reliable photocopier quality during their lifetime with the condition that the toner must be replaced with the original. If it is replaced by refilling, then refilling can only be done an average of three times. Meanwhile, replacement by refilling is needed by small and medium business units (SMEs) in an effort to save costs. Recharging that exceeds the average three times will cause the Minolta photocopier to have an error with code C032. Therefore, this paper was conducted to increase the frequency of the toner refill process as a solution for the Minolta Bizhub 421 machine to minimize losses due to interference with code C032. So, the machine can be refilled repeatedly without interruption, as well as adding error information via SMS using an Arduino microcontroller. Method was used experimental of placement sensor modification of photo interrupter and ATDC (After Top Dead Center) sensor. The results showed that after modifying the sensor placement, the number of refills could be increased to an average usage of toner exceeding 12 refills before the error code C032 occurred. This was because of the opto sensor was covered by toner powder and with an indicator that controlled the toner rotation it had reached set point. Then, with SIM 800L, which sends SMS and miss call notifications to users with a success rate of 98% and 2% error. Therefore, it helps users of the Minolta Bizhub 421 photocopier can more easily supervise the toner tube.
Solar Panel Tracking Control Monitoring System Benriwati Maharmi; Johan Bagus Purnomo Sidi; Machdalena Machdalena
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.348

Abstract

Solar energy is extraordinary and the largest energy on earth and no pollution. Solar cell technology is a technology that can absorb solar energy and convert in to electrical energy. In general, the installation of solar panels is only in one direction so that the absorption by the photovoltaic collector will not be optimal. Subsequence, the electricity produced is also less than optimal. To optimize the absorption of sunlight, the photovoltaic collector must be parallel to the sun. In this study, 4 LDR light sensors were used as detectors of the highest intensity of sunlight, the LDR output would enter the Arduino Mega microprocessor and control the DC motor to drive the solar panels. The monitoring process used a current/voltage sensor (INA219), temperature and humidity sensor (DHT 11), data from the sensor was processed by the ESP8266 Node MCU and then the data can be accessed via an Android Smartphone using the Blynk application. These data were transmitted to users wirelessly via the ESP8266 Node MCU module. From the test results, the energy generated when the solar cell was stationary averages V = 14.28 volts, I = 0.66 A and the energy when the solar cell moved averages V = 14.63 volts, I = 0.92 A. Therefore, the comparison of electric power in the condition that the solar panels moved according to the movement of the sun has increased by 30.13% compared to the stationary condition.
Analysis of Effectiveness of Cut Size Line Machines Based on Total Productive Maintenance (TPM) and Analytical Hierarchy Process (AHP) - A Case Study Muhammad Ardi; Agus Sutanto; Anita Susilawati
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 3 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i3.351

Abstract

This research aims to analyze the implementation of Total Productive Maintenance (TPM) using Overall Equipment Effectiveness (OEE) and Analytical Hierarchy Process (AHP) approaches to increase the OEE value on cut-size line machines in the finishing department in PT. X. The research methodology was carried out by calculating OEE and significant loss values, analyzing Pareto and Fishbone diagrams, and using the AHP as a decision-making method. Then, the recommendations for implementing focused and autonomous maintenance in the case study company. The research results revealed that the significant influencing factor for the OEE value was engine speed, which causes performance efficiency to decrease so that the OEE value also decreases. The OEE value in 2021 is 74%. The improvement plan by applying the TPM and AHP methods will be expected to increase the performance efficiency of the machine via OEE value from 74% in 2021 to 79% for the coming year 2023/2024.

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