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International Journal of Marine Engineering Innovation and Research
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 25415972     EISSN : 25481479     DOI : ttp://dx.doi.org/10.12962/j25481479
Core Subject : Science, Social, Engineering,
Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation
International Journal of Marine Engineering Innovation and Research (IJMEIR) is an open-access journal, which means that visitors all over the world could publish, read, download, cite and distribute papers published in this journal for free of cost. IJMEIR journal has a vast group of visitors, a far-reaching impact and pretty high citation. IJMEIR adopts a peer-review model, which insured fast publishing and convenient submission. IJMEIR now cordially inviting you to contribute or recommend quality papers to us. This journal is geared towards the dissemination of original innovation, research and practical contributions by both scientists and engineers, from both academia and industry. Theses, dissertations, research papers, and reviews associated with all aspects of marine engineering, marine sciences, and marine technology are all acceptable for publication. International Journal of Marine Engineering Innovation and Research (IJMEIR) focus and scopes are preserve prompt publication of manuscripts that meet the broad-spectrum criteria of scientific excellence. Areas of interest include, but are not limited to: Automotive Biochemical Biology Biomedical science Biophysics and biochemistry Chemical Chemistry Combat Engineering Communication Computer science Construction Energy Energy storage Engineering geology Enterprise Entertainment Environmental Environmental Engineering Science Environmental Risk Assessment Environmental technology Financial Engineering Fire Protection Engineering Fisheries science Fishing Food Science and Technology Health Care & Public Health, Health Safety Health Technologies Industrial Technology Industry Business Informatics Machinery Manufacturing Marine Engineering Marine sciences Marine technology Marine biology Marine economic Marine engines Marine fisheries Marine fuel Marine geology Marine geophysic Marine management Marine oil and gas Marine policy Material sciences Materials science and engineering Mathematics Mechanics Medical Technology Metallurgical Micro-technology Military Ammunition Military Technology Military Technology and equipment Mining Motor Vehicles Naval Engineering Neuroscience Nuclear technology Ocean Robotics and Automation Safety Engineering Sanitary Engineering Space Technology Statistics Traffic Transport Visual Technology
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 31 Documents
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Search results for , issue "Vol 8, No 2 (2023)" : 31 Documents clear
Hydrodynamic Model Simulation at the Port of Tanjung Rhu Belitung Sujantoko Sujantoko; Pramudya Adhi Pangestu; Dony Saputra; B. P. Putra Ekianto; Hasanudin Hasanudin; Nani Kurniati; Rindi Kusumawardhani; Dody Hartanto
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16660

Abstract

Ports around Belitung Island have an essential role in supporting inter-island shipping activities, which positively impact economic growth. So that predictions to find out the condition of the waters need to be made early to anticipate disruption to the ship's shipping lanes. This study's prediction of these waters was carried out with a hydrodynamic model. Model accuracy (calibration) compares model results with survey data. Based on several iterations, the tidal model and current velocity are obtained with an accuracy rate of 5% and 7%, respectively. These results indicate the model's relatively good level of accuracy because it is below 10%. The model results also found that current velocity and wave height are always higher during high tide conditions than during low tide. In addition, along the Tanjung Rhu shipping channel, the current speed at point A1 experiences a significant difference during high tide conditions, namely 0.285 m/s at high tide, 0.102 m/s at low tide, 0.072 m/s at low tide, and 0.033 m/s s when heading for high tide, because of the narrowing of the water area due to the crush of two landmasses. In addition, areas far from shipping lanes (A1 and A2) have the lowest wave height compared to areas close to shipping lanes (A3). Because the surrounding land slightly covers the two points (A1 and A2), the wave height is smaller than point A3 in more open waters.
Study of Variation of Binder Materials On Permeability Of Foundry Green Sand Widya Emilia Primaningtyas; Farizi Rachman; Tisya P. Ramadhani; Aminatus Sa'diyah
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16609

Abstract

The preparation of standards and procedures for the production process in the manufacturing industry plays an important role in achieving acceptable products and in accordance with the desired quality. Based on the data from the quality control report of a foundry company, casting defects slightly exceed the maximum reject rate. It was found that the moisture content in the molding sand produced according to the procedure exceeded the maximum water content in the molding sand. The research was conducted as an effort to improve the quality of the company's production in reducing reject products. Permeability values of molding sand and quantitative area of cast defects will be compared, as a variations of bentonite and molasses binders , in three variations of the percentage addition of binder, respectively: 1, 3, and 5%. The Anova Two Way approach was used to statistically assess the results of the permeability test of the test specimens to ensure the effect of the predictor variables on the response. The results indicated that the more molasses, 5% added to the molding sand, gave the highest permeability of 53.50 ± 0.50 cm3/minute and gave the lowest cast defect area of 11.97%. The addition of bentonite binder produces a phenomenon that is inversely proportional to the addition of molasses binder.
The Influence of SMAW Welding Current Variation on Tensile Strength, Corrosion Rate, and Microstructure of ST 42 Steel for Inner Bottom Plate Material in Ships Parlindungan Manik; Deddy Chrismianto; Putranda Firman Prayoga
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16900

Abstract

Steel is currently widely used in the industrial world. Due to its versatile uses, the development of steel science has also broadened, leading to improved steel processing methods. Welding is a process of joining two pieces of metal using heat. Steel, containing carbon, is prone to oxidation and rust. The aim of this study is to determine the influence of welding current variations on tensile strength, corrosion rate, and the micrographic structure of ST 42 steel. The research method employed is experimental. The welding current variations used are 70 A, 85 A, 100 A, 115 A, and 130 A. In this study, the highest average tensile stress was found at 130 A, measuring 519.20 MPa. For tensile strain, the highest values of 7% were observed at 115 A and 130 A. The highest modulus of elasticity was obtained at 115 A, with a value of 102.18 GPa. The highest corrosion rate occurred in specimens with 70 A, with a value of 0.19 mm/year (good), and the lowest corrosion rate was at 130 A, with a value of 0.10 mm/year (excellent). The micrographic structure testing results showed a decrease in the ferrite phase with each increase in current, while the pearlite phase increased. It can be concluded that the best welding current for ST 42 steel is at 130 A, due to its high tensile strength and low corrosion rate.
Delays Analysis Of TRANSKO Tawes 11.3 DWT Mooring Boat Development Project Based On Risk Management Imam Pujo Mulyatno; Samuel Samuel; Feri Adi Mukhlisin; Syaiful Tambah Putra Ahmad
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16610

Abstract

In shipbuilding projects, it is often the case that the project completion time exceeds the planned target time. Risk is an important factor in estimating the project schedule. If risk occurs in a project, it is certain that the project duration will increase. Therefore, risk analysis and mitigation are needed in the risk management of shipbuilding projects. The case study in this research is the 11.3 DWT TRANSKO Tawes mooring boat construction project owned by PT Pertamina Trans Kontinental which is experiencing delays. With data in the form of the project main schedule, risk analysis uses Primavera Risk Analysis software integrated with the Monte Carlo method to analyze risks to the schedule and provide an estimate of the exact project completion time. By randomly decreasing the uncertainty variable for 201 iterations, the results show that the percentage value of project delays is 11.38% of the target project construction duration of 167 days so that the project is estimated to experience a maximum delay of 19 days from the planned target duration so that the project is completed in 186 days or 1 day longer than the actual duration of the project which is completed in 185 days. In the TRANSKO Tawes 11.3 DWT mooring boat construction project, 12 risks were obtained that affected the project with details of 3 high category risks, 2 medium category risks, and 7 low category risks. As for the actual duration of the project, there is an increase in productivity compared to the duration of the simulation results, which is 0.0001 DWT/mandays.
Effects of Collision with a Self-Propeller Oil Barge Ship on a Navigational Buoy Wilma Amir Amiruddin; Ahmad Firdhaus; Hartono Yudo; Firmansyah Aulia Rakhman
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16324

Abstract

A navigation buoy is a navigational aid tool that is very important in supporting the safety of shipping lanes. However, navigation buoys are often lost and damaged, caused by several factors, one of which is being hit by a ship. Therefore, it is essential to conduct this research to determine the damaging effect on the navigation buoy after being hit by a vessel and to determine the effectiveness of using medium-density polyethylene material in the navigation buoy structure. This study uses a finite element numerical simulation method by making three variations of speed, as well as two variations of the angle of impact, namely 0° and 45°, which lasted for 0.1 seconds and was assisted by FEA software. The simulation results indicate that the largest maximum deformation occurs when the ship strikes the buoy with a speed of 7 m/s at an angle of 0° of 0.6 m. In this scenario, there is also a significant damage condition that results in tearing the buoy shell's surface by as many as 413 elements, or 1.24 m. The most extraordinary kinetic and internal energy produced occurred at a speed of 7 m/s with an angle of 45° of 147.15 kJ and 45.70 kJ. Therefore, it can be stated that the amount of buoy damage caused by a ship collision is dictated or impacted by the starting speed of the ship and the angle of impact state the most important part of your findings and achievements
Effectiveness of Adding Different Types of Vitamin C in Improving the Quality of Artemia salina sp. Ajeng Sukmasari; Nuhman Nuhman; Ninis Trisyani
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16879

Abstract

Artemia is a natural food that contains pigments (canthaxanthin), protein, vitamin C and some essential fatty acids for the growth of fish and shrimp. Artemia contains vitamin C, but it is still suspected that additional vitamin C is needed for larval development, gonad maturity and gamete quality. The purpose of this study was to analyze the effectiveness of vitamin C (ascorbic acid) absorption in the enrichment of Artemia sp. The stocking density of Artemia cysts was 2 g per 2 liters of water with a dose of Vitamin C of 100 mg/liter. The hatching process produced Hatching Percentage (HP) of 54.22% and 53.69%. The method used was laboratory experiment, analyzing Vitamin C absorption using UV-Vis Spectrophotometry method at 450-750 nm wavelength followed by BNT test. UV-Vis spectrophotometer method to determine the level of vitamin C absorbed during the artemia immersion process. Vitamin C absorption concentration after soaking process for 6 hours obtained an average of 0.8640 ppm and 0.8642 ppm. The results of the BNT test showed results with a value of 0.05, so the second type of Vitamin C applied to Artemia was not significantly different.
Analysis Of Docking Space Availability In One Web-Based Application For Shipyards In The Samarinda Region Dewi Sartika; Muhammad Badrus zaman; Nurhadi Siswantoro
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16684

Abstract

The development of the national shipping industry, especially shipyards, can increase the capacity of the national shipping industry in transporting goods and passengers between islands. Digitalization allows for major changes in business models that allow the creation of new companies that grow very quickly. Digitization can make new jobs easier by using technology in such a way to be used as efficiently as possible. Digitalization has created a business model that allows for a more practical concentration of the technology industry than the traditional business model. Based on information obtained in the field, shipyards in Eastern Indonesia, especially in the Samarinda and East Borneo regions, can improve the local economy, so that the schedule for the production of new building ships in the shipyard must be accommodated, upgraded to be more modern, After observations were made at several shipyards in Samarinda there appeared obstacles in the work carried out including: outsourced labor, area and waters depending on weather factors the work device still using standard technology, with these obstacles, the author tried to analyze the process of availability of shipyards in the Samarinda region using the fishbone diagram method of the purpose of the study this and all obstacles or problems faced by the shipyard through fishbone analysis and from the results of this research the result to be achieved is to make an application so that the administrative process is neat, repair and shipbuilding in the program properly and scheduled, also including repairs/maintenance, with an application-based or web-based business can help improve the business, because it will make it easier for shipowners to access adequate shipyards that are scheduled and have a location and place that suits the condition of their ships without making many long voyages to get a docking place with uncertainty of schedules.
Flettner Rotor Modification through Adding Ridges and Fins with Results Comparison to Base Model Nowar Deeb; Achmad Baidowi; Adi Kurniawan
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16643

Abstract

Oceans are the most crucial factor in maintaining global environmental equilibrium. Researchers are looking into the possibility of capturing wind power for shipping. Ship builders and owners provide several solutions based on the use of electrical power, low-polluting fuels, solar energy, and wind energy. The goal of this research is to learn more about using Flettner rotors as alternate sources of power and to create a new operational model for the rotor that could generate more power output from the currently available base model. Due to the sluggish market and glut of tonnage, the global shipping industry is now having difficulties. Only a few ships have wind-assisted technologies to help them save money on fuel. For the research, we created a base model in the 3D program from the available data about the commercially used Flettner rotor, then we modified a number of variations for the model and compared the results we reached from the CFD software to find an outcome that is better than the current output of the base model, and the results have shown improvement for the lower wind speeds.
Influence of Slat Size Variation as Passive Flow Control Instruments on NACA 4415 Airfoil Toward Aerodynamic Performance James Julian; Rizki Aldi Anggara; Fitri Wahyuni
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16427

Abstract

Airfoil is a fundamental geometry in designing various aerodynamic objects. Passive flow control installation is essential in determining the airfoil's aerodynamic performance. The influence of variations in slat size as a passive flow control instrument is analyzed using the CFD method with a Reynold number of Re= 10^6. NACA 6641 airfoil was used as the slat geometry with size variations of 10%c and 16%c. Based on the computational results, variations in slat size have a substantial influence on the aerodynamic efficiency of the airfoil. Variations in slat size additional Cl ability to reach 20.6043% and 13.1917%, respectively. In addition, a 16%c slat can delay a stall until it reaches AoA ≥ 19°. Meanwhile, a 10%c slat can delay a stall until it reaches AoA ≥ 17°. However, variations in slat size also affect the resulting drag force. Slat measuring 16%c can addition Cd up to 50.9252%. Meanwhile, 10% c slat additional Cd up to 21.8389%. Based on the resulting lift-to-drag ratio curve, a 10%c slat has the lowest lift-to-drag ratio compared to a 16%c slat. However, a 10%c slat has the highest level of stability when compared to a 16%c slat installation and without a slat installation. 
Stability Analysis of Double Axis Retractable Solar Panel Mechanism for Harbour Tug Application Danang Cahyagi; Sapto Wiratno Satoto; Ihsan Musyary; Haris Susmana; Ranjit Ranjit; Wanda Cantika Putri; Muhammad Regie
International Journal of Marine Engineering Innovation and Research Vol 8, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.16802

Abstract

Due to the use of fossil fuels in recent decades, maritime researchers and stakeholders have started to become concerned about energy efficiency and environmental protection. The larger social and economic facets of society may suffer as a result of these problems. In an effort to offer a remedy, this research created the B-Solar Wings, the double axis retractable solar panel mechanism design concept for harbor tug applications. B-Solar Wings was created using a variety of strategies to make the most of harbour tugs' constrained space for solar energy absorption while taking into account challenging ergonomic and safety concepts. B-Solar Wings can assemble 7 solar panel units for a total power of 3150 based on the design results. In order to assess the viability of stability brought on by the installation and use of solar panels, this study also offers a modeling analysis. The B-Solar Wings are stable in terms of stability, according to the results of the modeling and validation with the guidelines stated in IMO A. 749 (18). The minimum required value for one of the categories, code 3.1.2.1: Area 0 to 30, is 3.15 m.deg, and the harbour tug's stability value is 17.11 m.deg in the folded position and 17.10 m.deg in the full-open position. Solar energy produced by solar panels can be stored in a battery and integrated into the main distribution panel through multiple stages of voltage conversion and stabilization in the power system for B-Solar Wings.

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