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Frengki Mohamad Felayati
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International Journal of Marine Engineering and Applications Department of Marine Engineering, Universitas Hang Tuah Jl. Arief Rahman Hakim No.150, Surabaya, Jawa Timur, Indonesia 60111
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International Journal of Marine Engineering and Applications
Published by Universitas Hang Tuah
ISSN : -     EISSN : 3063640X     DOI : https://doi.org/10.30649/ijmea.v2i2
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Mechanical Engineering Transportation
International Journal of Marine Engineering and Applications is a peer-reviewed, open-access journal dedicated to advancing the field of marine engineering and its diverse applications. With a focus on promoting high-quality research and innovative solutions, IJMEA is a premier platform for researchers, engineers, academicians, and practitioners worldwide. At IJMEA, our mission is to facilitate the dissemination of high-quality research and development in marine engineering and related areas, fostering collaboration and knowledge exchange among experts from various disciplines. We aim to contribute to the sustainable advancement of marine technology, addressing challenges and exploring opportunities in maritime industries and marine sciences. IJMEA welcomes original research articles, review papers, technical notes, and case studies covering a broad spectrum of topics in marine engineering and applications, including but not limited to: - Ship design, construction, and operation - Marine engineering - Marine production and manufacture - Naval architecture - Marine propulsion systems - Mechanical engineering - Offshore engineering - Ocean renewable energy - Maritime safety and environmental protection - Coastal engineering - Marine robotics and autonomous systems - Underwater technology - Marine materials and corrosion - Port and harbor engineering - Marine resource management
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 12 Documents
 1   2 
NUMERICAL SIMULATIONS OF TURBULENT GAS-SOLID FLOW IN A GRADUAL EXPANSION Indiaryanto, Mahendra; Kusuma, Cahya; Arsad, Roy Mansyah
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.365

Abstract

The dwindling availability of petroleum fuels encourages the use of fuel from renewable and environmentally friendly natural resources. This study focused on the iodine value in used biodiesel methyl ester and its effect on the performance of the main components of a diesel motor such as power, torque, brake mean effective pressure (BMEP), and specific fuel oil consumption (SFOC). Numerical research was carried out on the YANMAR TF85-MH engine model using computational fluid dynamics (CFD). The variations used are biodiesel B20, 20A, and 20B at three different engine rotation speeds, 1900 RPM, 2000 RPM, and 2100 RPM. The results show that the performance of biodiesel B20 is better compared to others. It produces 4.01 kW of power, 19.79 N.m of torque, 82065.12 Pa of BMEP, and 270.43 gr/Kwh of SFOC. While the B20A produces 4.61 kW of power, 20.44 N.m of torque, 84067.31 Pa of BMEP, and 288.76 gr/Kwh of SFOC. Then, the B20B produces 4.12 kW of power, 20.57 N.m of torque, 83244 Pa of BMEP, and 316.57 gr/Kwh of SFOC. So, it can be seen that the mixture of biodiesel fuel with iodine slightly affects the increase in diesel motor performance. In addition, the use of renewable energy fuels must be encouraged because their availability is maintained.
MAINTENANCE ANALYSIS OF ANCHOR CHAIN AGAINST CORROSION RATE BY PAINTING METHOD Maulana Noor, Fariz; Rulianto, Rizal
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.366

Abstract

One of the damages to the anchor and its chain is caused by being exposed to various environmental loads from the sea every time the anchor is lowered or when the anchor is raised, so that gradually it will experience fatigue or fatigue due to dynamic loads that occur repeatedly in a long period of time.However, there has not been an analysis that combines anchor chain maintenance of the corrosion rate with the painting method and comparison between before painting and after painting. Therefore, the researchers proposed a study "Analysis of Anchor Chain Maintenance of Corrosion Rates Using the Painting Method". This study aims to carry out an analysis to reduce the corrosion factor on the anchor chain by using marine coatings or painting processes, so that the operability and capability of the system can be maintained. The research design is based on an experimental method that seeks to posit and solve the problem of the condition of a ship's anchor chain made of steel or metal. based on both visual data and literacy. The existing data, then analyzed and interpreted, which is comparative. The interval for each coat of paint depends on the drying power. What can you do with the next coat of paint if the previous paint layer is dry, but it should not exceed the specified paint allowance, because it will give poor adhesion. From the analysis of the anchor chain structure, the resulting stress is 168.73 MPa, if it is estimated with a period of 3 years from the anchor chain structure, the stress result is 192.75 MPa, and if it occurs at this time in 2022 with a period of 5 years, the stress result is 213.95 MPa .
INTERACTION ANALYSIS HULL AND PROPELLER AND IMPROVEMENT OF EFFICIENCY PROPELLER ON FISHING VESSELS Jami'in, Mohammad Abu; Primanjaya, Abi
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.367

Abstract

The determination of propeller and hull adjustment of both small and large fishing vessels is indeed very important, in general, fishing vessels at the port of Lamongan only use hereditary techniques. many weaknesses in the problem of synchronization between the hull, the main propulsion engine, and the propeller. therefore, after analysis, it can be concluded, that at the coastal port of Lamongan, an Ijon-Ijon type fishing boat, with a main size of 5-10 GT. In one ship using the Mitsubishi Fuso 120 ps 2 engine type, using 2 gearbox advance ratio 3.1 rated input speed 1000- 2500 r/min and rated trans capacity 0.039 kW/min with a total resistance value of 17.599 kn, wake fraction value 0.235, value thrust deduction 0.197 and using a propeller with type B-series B3-35 with a diameter of 1.54 with a KT value of 0.31, a value of 10KQ 0.37, a value of J 0.52 and an average efficiency value of 0.48. By changing the diameter propeller to 1.75 and changing the ratio gearbox with the same engine, a comparison can be made between the efficiency of the propeller previous and the efficiency after changing the diameter propeller with a KT value of 0.30, a value of 10KQ 0.345, a value of J 0.55 and average efficiency value 0.565.
IMPLEMENTATION OF FISH DISTRIBUTION QUALITY WITH COLD CHAIN SYSTEM (CASE STUDY: PRIGI TO TULUNGAGUNG) Sa'adah, Nor; Maisaroh, Dian Sari; Sukma, Raka Nur; Aji, Prasetyo Bayu
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.368

Abstract

Prigi Nusantara Fishing Port is a port located in the south of Java Island. Where the production of fishermen's catches that can be landed at the Prigi Nusantara Fishing Port is 24,928,229 kg. It is necessary to have a management plan and identification of cold chain system distribution costs to maximize the distribution of catches, in this study to the Tulungagung area. Cold storage also has an important role in the cold chain system. Thus, this study plans to identify the management process identify distribution costs, and assess the role of cold storage. This research aims to identify the management process and identify distribution costs as well as assess the role of cold storage. The results of this management mapping plan are from fishermen to cold storage, cold storage processing, and transportation to markets and consumers. With a total cost of IDR 173,382,000/year, including operational costs of IDR 82,950,000/year and vehicle travel costs of IDR 90,43,000/year, using a Thermo King truck. Assessment of the role of government cold storage obtained a score of 45.8% while private cold storage 43.6%. The role of cold storage is still not optimal for storing fish to stabilize prices.
THE EFFECT OF FLUID FLOW RATE ON THE CORROSION RATE OF THE PIPE OF SEA WATER SYSTEM Sambodho, Kriyo; Kusherminto Priyo Pratomo, Kurnia
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.370

Abstract

Corrosion is a process of decreasing the quality of material because it reacts with the environment. The corrosion process takes place spontaneously and is a natural event that cannot be avoided. This research was carried out to determine the relationship between the fluid flow rate of seawater flowing in the channels of API 5L grade B standard galvanized pipe and seamless pipe specimens on the corrosion rate using flow modelling for 4 months. The research variations used were variations in flow rate, namely 50%, 75%, and 100%. Corroded pipe specimens were cleaned, weighed, and photomicrography. From this research, it was found that the higher the flow rate, the higher the corrosion rate that occurs and the corrosion that occurs is abrasion corrosion and pitting corrosion.
TECHNICAL ANALYSIS OF ENGINE PROPELLER MATCHING KRI X AFTER MAIN ENGINE REPOWERING Fajar, Imron Achmadi; Ratna, Miftakhul Jannah Dwi
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.372

Abstract

The gas turbine which is one of the main engines of KRI X is not used anymore because of the amount of damaged material. In 2017 it was decided to replace its main engine. Ships that previously used gas turbines and two diesels as the main engine are replaced with four MTU diesel brands with 4000 HP power and 2100 rpm rotation per engine. With a fixed propeller and a power change on the main engine, the matching point of the main engine also changes. Referring to the problem, this study conducted an assessment of engine propeller matching obtained after repowering the main engine, by calculating the pricing of the ship and calculating the power required by the ship. The calculation of ship resistance is done in two ways that is with the help of running software maxsurf with the Holtrop method and calculation by using an empirical formula. Having known the price of the ship's resistance and power required, then calculated the speed of the ship with the new main engine and the variation of the pitch propeller. The result of this research obtained the operating point (matching point) which resulted in optimum speed obtained at the main rotation condition of 1974 rpm, propeller rotation 452,666 rpm, with 85% power loading that is 6152,426 kW, ship speed reached 17,855 Knot, and in this condition is deemed to be by the operation of the continuous service rating.
TECHNICAL STUDY ON THE COMPARATIVE PLANNING OF A WASTE COLLECTION VESSEL PROPULSION SYSTEM: CONVENTIONAL ENGINE AND SOLAR PANELS Ariani, Betty; Robby, Burhana
IJMEA Journal Kedokteran Gigi Vol 1 No 1 (2024): September 2024
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v1i1.374

Abstract

Conventional diesel engines, also known as mechanical direct injection systems, represent a traditional approach to fuel delivery in engines. In contrast, solar panels convert sunlight into electrical energy using the photovoltaic effect. This research aims to conduct a technical comparative study on the planning of a waste collection vessel propulsion system using both conventional diesel engines and solar panels. The vessel system design requires 3.78 hp. The battery capacity calculated for this system is 84.24 Ah, with an operational duration of 6.4 hours for the diesel engine. The waste capacity is 0.371 m³/ton, with a power requirement of 3.75 hp, and the chosen engine for this setup is the Yamaha 5CHMS. For the solar panel system, the potential calculation is 5.47 hours of sunlight, with a similar vessel system design of 3.78 hp. The battery usage duration is 6 hours, with the same waste capacity and power requirement. The selected solar panel is the Hangkai DNYSJYSJ. Based on technical calculations, it can be concluded that a waste collection vessel with a conventional diesel engine is more efficient due to its consistent technical performance requirements.
MODEL OF IMPROVING SEAFARERS' COMPETENCE TO REDUCE TURNOVER IN THE MARITIME INDUSTRY Marsudi, Sugeng; Awwalin, Rodlitul; Supangat; Nasihah, Ainun
IJMEA Journal Kedokteran Gigi Vol 2 No 1 (2025): March 2025
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v2i1.377

Abstract

This study aims to develop an effective seafarer competency improvement model in reducing turnover rates in the Indonesian maritime industry. The research method used is a mixed-method with a quantitative and qualitative descriptive approach. Data collection was carried out through questionnaires, interviews, and documentation studies of 150 seafarers from five national shipping companies. The Technology Readiness Level (TRL) of the proposed model was evaluated at TRL 7, indicating that this model has been tested in a limited operational environment with adequate results. The results showed that 65% of seafarers felt they did not receive adequate competency-based training, while 48% of them indicated a desire to change jobs shortly. The competency improvement model, designed based on digital technology and simulation-based training, succeeded in increasing the average competency score of seafarers from 68% to 85% within six months. In addition, the turnover rate of the company that became the pilot project for this model decreased from 22% to 14%. This study offers a state-of-the-art in the form of an integration of competency-based approaches with digital technology, different from previous studies that focused on conventional interventions. The novelty of this study lies in the use of a digital-based model that combines continuous evaluation and adaptive training programs that are tailored to the needs of individual seafarers. This model is expected to be a strategic solution to increase seafarer retention in the maritime industry while strengthening the competitiveness of the Indonesian workforce in the international market.
EFFECT OF PROPELLER DESIGN ON PROPELLER EFFICIENCY ON CARGO SHIPS Kusuma, Cahya; Indiaryanto, Mahendra
IJMEA Journal Kedokteran Gigi Vol 2 No 1 (2025): March 2025
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v2i1.378

Abstract

This research examines the effect of the use of propellers on propeller performance on cargo ships. Using computational fluid analysis (CFD), the study evaluated the fluid flow around the propeller under two conditions: with and without a propeller. Shows an increase in propeller efficiency of up to 15% at cruising speed with the use of propellers. The implication of these results is the potential application of propeller technology to improve the overall efficiency and performance of cargo ships. Through a combined approach of numerical simulation and experimental testing, we conducted an in-depth analysis of various propeller designs. With factors such as shape, size, angle of attack, and propeller profile in evaluating propeller performance. Empirical data were obtained through trials at a model ship test facility and compared with computer simulation results. The results of this study provide valuable insights for the shipping industry in improving the operational efficiency of cargo ships. These findings can be used by shipping companies and shipbuilders to optimize propeller designs and improve their operational efficiency.
CASE STUDY OF MARINE SAFETY IN TRANSPORTING DANGEROUS GOODS Rudianto; Arianto, Pratama Yuli; Rulianto, Jangka; Wahyudinata, Nauval Maulana Yusuf
IJMEA Journal Kedokteran Gigi Vol 2 No 1 (2025): March 2025
Publisher : Department of Marine Engineering, Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/ijmea.v2i1.379

Abstract

This case study explores marine safety in transporting dangerous goods, focusing on the impact of risk management practices. Transporting hazardous cargo poses unique challenges, necessitating stringent safety measures to prevent accidents and safeguard the environment. Through a thorough analysis of maritime regulations, safety protocols, and real-world incidents, the study assesses the efficacy of safety measures and identifies areas for enhancement. The findings underscore the significance of rigorous safety protocols, crew training, and advanced technology, including real-time cargo monitoring systems and emergency response plans. Furthermore, the study highlights the importance of proactive risk assessment and continuous safety improvements. Human factors are also addressed, emphasizing the pivotal role of a well-trained and alert crew in ensuring vessel safety. In summary, this research contributes to ongoing initiatives aimed at enhancing vessel safety in the transportation of dangerous goods. It emphasizes the crucial elements of regulatory compliance, risk management, and proactive safety measures within the maritime industry.

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