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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 30 Documents
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Search results for , issue "Vol. 8 No. 2 (2023)" : 30 Documents clear
Numerical Investigation of the Laying of Airbag Arrangements on Launching Barges Alamsyah; Christian Hendra Gonawan; Rodlian Jamal Ikhwani; Taufik Hidayat; Habibi; Wardina Suwedy
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5445

Abstract

Ship-launching technology is developing rapidly in an effort to reach a point of economic efficiency, time efficiency, security, and flexibility. On the one hand, risks to the process of launching ships using airbags are still present and can occur. Exploding airbags due to the inability to withstand the load has implications for structural damage. Excessive pressure on the airbags can cause structural deformation. This study aims to determine the effect of airbag pressure on the strength of the ship's structure. This study uses finite element-based software to analyze stresses and deformations in ship construction when interacting with airbags. From this study, it was found that the number of airbags used in the two-row layout and cross-over arrangement was 14, with the status of the airbags in terms of load distribution being safe (not broken). The maximum stress value obtained from the simulation on the two-row arrangement layout is 11.62 MPa when it is right in the frame and 9.83 MPa when it is between frames. As well as in the cross-over arrangement layout, the maximum stress is 20.24 MPa when in the frame and 13.84 MPa when in between frames. This phenomenon occurs because of the stress concentration in the frame.
Biodiesel Potentials of Waste Cooking Oil (WCO): Production, Content of Fuel Properties, and Effects on Engine Performance Suardi; Doddy Suanggana; Basri Said
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5446

Abstract

The potential for biodiesel to become the main fuel in the future seems to be getting brighter with the enactment of government policies related to the implementation of the Euro 4 standard. In addition, the government has also launched de-carbonization to reduce the greenhouse effect by referring to the International Maritime Organization (IMO) plan which sets a target of reducing world carbon emissions by 40% by 2030 and 70% by 2050. To answer this challenge, this research aims to find out the bio-diesel production process by utilizing waste cooking oil (WCO), the next step is whether the biodiesel produced has content properties that are following the quality standards set by the government, the final step is that the bio-diesel is tested on a test engine to know the value of the engine performance produced. In this research two types of methods are used to solve the problem, the first is the transesterification method, which is a method commonly used in the process of making biodiesel, this method utilizes a catalyst to separate pure biodiesel from glycerol, in this research using methanol and NaOH catalysts. The second method is the experimental method, which is testing biodiesel directly on the engine so that the resulting engine performance values including power, torque, and SFC can be known. The test obtained results in the form of content of fuel properties still included in government standards which include Density, Viscosity, Flash Point, Pour Point, and Cetane Number. The best torque value is in the B15 fuel variation at engine speeds of 1400 RPM and 1600 RPM, for the best effective power value results in the B15 fuel variation using engine speed of 1600 RPM, and the best specific fuel consumption value in the B15 fuel variation at 1000 RPM engine speed. So it can be concluded that mixing coconut cooking oil with pure cooking oil into biodiesel can be used as an alternative fuel and has a good impact on diesel engine performance.
Leading Edge Modification of NACA 0015 and NACA 4415 Inspired by Beluga Whale James Julian; Waridho Iskandar; Fitri Wahyuni
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5447

Abstract

This research modifies the leading-edge structure of NACA 0015 and NACA 4415 to resemble the nose of a beluga whale. The focus of this modification is to improve the airfoil's aerodynamic performance and investigate the changing fluid flow patterns. Numerical equation used is RANS combined with the k-epsilon turbulence model. Mesh independence test shows that mesh with 200 elements is the best mesh. Validation results reveal that CFD data can follow the trend of experimental data, especially on the AoA before the stall. There was a significant increase in Cl from NACA 0015 and NACA 4415 at AoA>9°. On the other hand, the modification also had a positive effect by lowering the Cd value. The modification also provides an advantage by increasing the maximum Cl/Cd value. Furthermore, the separation point data shows that the modification can delay the separation of the fluid flow in the airfoil. Modifications can cause an increase in pressure on the lower side and a decrease in pressure on the upper side. Through velocity contours and streamlines, the modifications can reduce the recirculation area. Overall, modifying the leading edge has positive impacts on the NACA 0015 and NACA 4415 airfoils.
Experimental Study of Wave Reflection on A-Jack Armor Unit on Seawall Structure Sujantoko; Pramudya Adhi Pangestu; Widi Agus Pratikto; Mahmud Mustain; Wahyudi Mustain; Hasan Ikhwani
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5448

Abstract

In planning the construction of a seawall, it is necessary to consider several things, such as incoming waves, types of defensive units, and economic factors. So planning for the type and size of the armor unit used, it is expected that the structure will only experience minimal damage. In addition, there are other considerations, such as wave reflection by the structure. In the port area, a structure with low wave reflection is needed to keep the anchored pool calm. In this study, experimentally, the effect of the reflection coefficient on the seawall structure with the A-Jack armor unit was carried out. The experiment was held in a wave flume with regular waves with variations in height (0,10 – 0,175 cm) and periods (1,4 seconds and 1,6 seconds) of waves with three variations of a structural slope, namely 1:1, 1:1,5, and 1:2. The reflection coefficient analysis was carried out using the two-point methods which were recorded with a wave probe. Based on experiments, it is known that the steeper the slope of the structure will result in a more significant increase in reflection. To improve the accuracy of the spectral variations of the incident and reflected waves, it is necessary to record with three-wave probes because the two-wave probe method has several weaknesses and is prone to interference in analyzing the data obtained.
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 : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5449

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.
Numerical Study of Kaplan Propeller by Using CFD: Effect of Angle and Blade Diameter Variations Mohammad Danil Arifin; Frengki Mohamad Felayati; Muswar Muslim; Ayom Buwono; Yeddid Yonatan Eka Darma
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5451

Abstract

Efficient propeller performance contributes to better overall ship performance and speed. A well-designed propeller can optimize thrust generation, leading to improved maneuverability, responsiveness, and acceleration. It enables ships to maintain higher speeds while using less power, enhancing their competitiveness in the maritime industry. In this study, the Kaplan series propeller was analyzed by using Computational Fluid Dynamics (CFD). By modifying the angle of attack on the Kaplan propeller with 3, 4, and 5 blades, the distribution of the surface pressure, generated thrust, and torque value were easily identified and analyzed. The result shows that the change in the angle of attack influenced the pressure distribution on the back and face side of the propeller. The angle of attack is increased, and the pressure surface distribution also tends to increase. It has also affected the efficiency of the propeller performance which is expressed by the values of thrust propeller and torque. The more efficient the propeller performance, the less power it requires to produce the desired thrust.
Redesigning a 300 ft Barge as a Floating Hotel to Support Tourism in the Thousand Islands Augustinus Pusaka; Erwin Gunawan; Fanny Octaviani
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5452

Abstract

The Thousand Islands is a marine tourism area located around Jakarta, which has several beautiful and charming islands. Many cargo barge decks are not operating because natural resources are starting to decline. One of the innovations to increase tourist attraction is by designing a floating hotel using a 300 ft barge as a supporting facility in the Thousand Islands. Determination of the main size of the ship using the method of comparison of several barge sizes of 300 ft and stability calculations using the A.N-Krylov method with maxsurf software. Obtained ship size LOA = 91.5 m, B = 27.5 m, H = 5.5 m, T = 4.3 m. The superstructure modification has three decks, each deck being 3 m high with a different length. The results of the floating hotel design have a total of 52 rooms that can accommodate 116 visitors. There are superior room types, deluxe rooms and suite rooms and are equipped with other facilities. The floating hotel's safety equipment includes 8 lifebuoys, 188 lifejackets, 4 lifeboats and 8 liferafts. The stability of the floating hotel meets the intact stability criteria of the IMO standard A.749(18) Ch3 - Design criteria applicable to all ships.
Performance Analysis of a Point Absorber Wave energy Converter in Nigerian West Coast; Gulf of Guinea Orji U Charles; Kabiru Olayinka Oyegbemi; Douglas Ibiaba
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5454

Abstract

This paper presents a performance analysis of a point absorber wave energy converter (WEC) in the Gulf of Guinea along the Nigerian West Coast. The study aims to evaluate the device's efficiency and power output under different wave conditions in the Gulf, including extreme cases. To achieve this, an existing CAD model of a point absorber was reproduced in Auto-CAD and meshed in Ansys Aqua, to obtain the added mass and damping coefficient, it was finally imported in MATLAB where the simulation model was created using WEC-Sim software. The scatter diagram data from the region were analyzed, the probability of occurrence of each of the wave on the diagram was calculated and ranked, the top five conditions was fed in as input to the device. The results show that the device's efficiency is highest at a wave height of 2 meters and a peak period of 11 seconds. The power output is highest when the device resonates, this occur at a peak period and significant wave height of (4m & 15s). However, the efficiency decreases as power output increases. The study also confirms the device's suitability for the region, as it showed no abnormal behavior under extreme conditions. Further research is needed on optimizing the mooring line design and evaluating the cost-effectiveness of the device in the region.
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 : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5455

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.
Stability Analysis of Double Axis Retractable Solar Panel Mechanism for Harbour Tug Application Danang Cahyagi; Sapto Wiratno Satoto; Ihsan Musyary; Haris Susmana; Ranjit; Wanda Cantika Putri; Muhammad Regie
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5456

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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