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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,
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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
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Articles 25 Documents
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Search results for , issue "Vol. 9 No. 3 (2024)" : 25 Documents clear
Integrity and Safety Factors of Asymmetric Mooring Line Arrangement on Ocean Farm ITS Yeyes Mulyadi; Yani Nurita Purnawanti; Haryo Dwito Armono; Mohammad Hilmy Mahdyansyah; Muhammad Rizky Syarifudin
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4910

Abstract

An offshore aquaculture model called OFITS has been designed to be installed in the Indonesia Ocean. The OFITS structure consists of an underwater fish cage and living quarters at the superstructure. An asymmetric mooring line arrangement is proposed to be applied at OFITS. This paper aims to analyze the integrity and safety factor of the asymmetric mooring line arrangement used on OFITS in the presence of environmental load. The proposed asymmetric mooring line arrangement has 14 lines with a specified configuration. There are 10 mooring lines installed on the front side in line with the incoming waves and 4 others installed behind the cage. A nylon line with a diameter of 42 mm and a length of 70 m is used as the mooring line attached to a steel anchor weighing 0.25 tons. The analysis method for the moored cage motion uses the time domain analysis. The mooring line's integrity analysis results show that the maximum tension result is 18.55 tons, with a safety factor of 2.07. It can be concluded that the proposed asymmetric arrangement mooring has good integrity and meets the safety factor requirements of the DNVGL standard, with a minimum safety factor of 1.45.
Implementation Of Poverty Reduction Policies By The Regional Poverty Reduction Coordination Team (TKPKD) in West Pasaman District Sonda Winari; M. Fachri Adnan
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4911

Abstract

This research is based on the need to accelerate poverty reduction for community welfare. The aim of this research is to describe the implementation of poverty reduction policies by TKPKD West Pasaman Regency. This research uses qualitative research. The research location was at the West Pasaman Social Service office, the Regional Development Planning Agency (Bappeda), as well as poor villages and community leaders in West Pasaman Regency. Data collection techniques include interviews, documentation studies and field notes. The data validation technique used is a triangulation technique which involves re-checking data previously obtained from various sources to assess the correctness of the data. The data analysis procedure is broken down into several processes which include data collection, data reduction, data presentation, as well as drawing conclusions and verification. The research results show that poverty reduction by West Pasaman Regency TKPKD has not fully achieved the desired targets. There are several factors that influence the implementation of poverty reduction policies by West Pasaman Regency TKPKD, namely; First, the environment is still considered bad. This happens because there are still many individuals who are lazy to work. Second, there are still many organizations that are less active in working in the social sector, especially in terms of eradicating poverty. Third, the resources that West Pasaman Regency has in the TKPKD sector are still not optimal because West Pasaman has not fully maximized the resources that have been applied. Fourth, the character of the implementing agency: In this case, TKPKD implementers have not carried out their responsibilities well.
The Effect of Number of Spark Plug Ground Electrodes and Octane Rating on Single Cylinder Engine Performance Yuniarto Agus Winoko; Jefri Haris Sudarmanto
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4912

Abstract

Vehicle ignition systems, including spark plugs, are a certain way to boost a motorcycle's performance. One kind of spark plug used to ignite the combustion process in a gasoline engine is a multi electrode spark plug, which has two or more ground points built into the electrodes. This study's overarching goal is to identify the optimal combination of multi-ground spark plugs, gasoline octane value fluctuations, and power/torque/specific fuel consumption parameters. Engine performance testing relies on data collected from controlled laboratory tests. In addition, Microsoft Excel is used for data analysis, and the results are shown in graph tables. Spark plug electrode amount in feet and gasolines octane level are the independent variables. Speed the engine from 5500 to 9000. The peak power output of 6.92 Hp was achieved at 7000 rpm in the power test with RON 92 gasoline X-Line spark plugs. At 5500 rpm, the maximum torque of 8.21 Nm was produced by the torque test using RON 98 gasoline X-Line spark plugs. At 6000 rpm, the specific fuel consumption test with RON 90 fuel and standard spark plugs yields a value of 0.0800 kg/Hp.hour.
Analysis of the Relationship Between Percentage Coral Cover and Water Quality Effects in Penuktukan, Bali Trifajriah Lutea Ayu; Munasik; Agus Trianto; Maestro Munru
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4913

Abstract

The coral reef ecosystem is a diverse ecosystem that provides coastal protection, food sources, and raw materials for medicine, among other ecosystem services. Coral reef research in Penuktukan, Bali, is fundamental given its urgency in preserving the biodiversity and health of existing marine ecosystems. However, the condition of coral reefs in Penuktukan has yet to be widely studied. Hence, information on species diversity, health conditions, and the impact of environmental change and human activities on this ecosystem still needs to be explored. This research is aimed at fill these data gaps by evaluate the health status of coral reefs, identifying species present, and assessing the impacts of environmental and anthropogenic factors on coral reefs in Penuktukan. The study was conducted at eight observation stations to represent differences in environmental characteristics in July 2023. Field observations were conducted to measure water parameters, and underwater Photo Transects were used to determine the percentage of live coral cover. The results obtained on average water parameters include a temperature of 26.4 ° C, a salinity of 32.7‰, a pH meter of 7.7, a brightness of 3 meters, a depth of 3 meters, and 7 meters depth of 7 meters. This study identified coral massive (CM), coral encrusted (CE), and coralfoliose (CF), which were the most prevalent life forms in Penuktukan Village. The average percentage of live coral reefs in Penuktukan Village was 30.42 %, which suggests that coral reefs in Penuktukan Village Waters are in a medium condition, which is suitable for supporting coral reef ecosystem resilience and development.
Performance and Emission Characteristics of Diesel Engines Using Biodiesel from Waste Cooking Oil with Cetane Number Improver Suardi; Faisal Mahmuddin; Syerly Klara; Muhdar Tasrief; Muhammad Uswah Pawara; Hijriah; Muhammad Reza Fachrul Jaya
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4914

Abstract

The depletion of fossil fuel reserves has led to a global energy crisis, with increasing demand for alternative energy sources. Diesel fuel shortages, especially in countries like Indonesia, have driven the exploration of biodiesel as a sustainable alternative. This study aims to convert waste cooking oil (WCO) into biodiesel, with the addition of a cetane number improver (CNI) to enhance its performance in diesel engines. The biodiesel was produced through methanolysis, and 2-Ethylhexyl Nitrate (EHN) was added to improve combustion and reduce engine knocking. The results show that the produced biodiesel had a density of 856 Kg/m³ for B0, 872.7 Kg/m³ for B0 with CNI, and 872.1 Kg/m³ for B50CN. Viscosity values were 2.32 cSt for B0, 5.645 cSt for B50, and 4.722 cSt for B50CN. The cetane index was 49.2 for B50 and B50CN, while B0 had a value of 48. The emissions measured included CO levels of 194 mg/Nm³ for B0, 254 mg/Nm³ for B50, and 280 mg/Nm³ for B50CN. NOx emissions were 852 mg/Nm³ for B0, 755 mg/Nm³ for B50, and 825 mg/Nm³ for B50CN. Oxygen content was 15.9% for B0, 14.9% for B50, and 16.2% for B50CN. The findings indicate that adding EHN to WCO biodiesel improves fuel properties but increases emissions of CO and NOx. Overall, WCO-based biodiesel with EHN is a viable alternative fuel that balances performance improvements with environmental considerations.
Comparative Analysis of Space-Based Battery, Fuel Cell, and Conventional Propulsion System for General Cargo Ships Of Approximately 100 Meters Axel Rafoth; Achmad Baidowi; Quito Abian Iqtarib
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4915

Abstract

This research aims to serve as a guidebook or framework for designing a general cargo ship, approximately 100 meters in length, by replacing the conventional diesel system with hydrogen and fuel cell technology. The reference vessel for this study is the general cargo ship with about 100m length operated in Baltic Sea. The results of this research provide the foundational calculations for designing a ship powered by hydrogen fuel cells, including the selection of hydrogen type, battery choice, and compliance with class standards. Additionally, the transformation of the ship's layout is a key outcome of this study. Based on the calculations, the ship, with a sailing duration of approximately three days, requires around 2800 kg of liquid hydrogen. This hydrogen supply can support 4 x 200 kW fuel cells and 5 x 70 kWh batteries. Ultimately, this allows for the design of a hydrogen-powered ship with an endurance of three days.
Design Of a Semi-Automatic Hand Line (Hand Line) For Semi-Automatic Squid in Wangi-Wangi Selatan Sub-District, Wakatobi District Surahman Suwardi; Mulyono Baskoro; Didin Konarudi Iskandar
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4916

Abstract

The amount of energy drained on fishermen when catching and using traditional squid fishing gear takes a long time, affecting fishermen's income. This research aims to design a semi-automatic squid fishing rod and determine the efficiency of using the new design of semi-automatic squid fishing gear. This research was conducted in the South Wangi-Wangi District, Wakatobi Regency, Southeast Sulawesi Province, from December 2023 to January 2024. The research method used was experimental fishing, which was used to design a semi-automatic fishing rod to know the effect of using semi-automatic fishing gear on catches. The construction of the semi-automatic squid fishing rod is by the planned design and is technically feasible to use. The productivity of the research shows that from the weight of the semi-automatic squid fishing rod catch of 36.02 kg, the number of 459 tails during 16 trips. The catch of traditional squid long line with a total weight of 34.76 kg and 511 tails during 16 trips. The results of statistical tests using t-test analysis show a difference that does not significantly affect the results of both fishing gears.
Phytoplankton in Eutrophic Waters of Hurun Bay: An Examination of Composition Patterns, Structure, and Impacts on Aquatic Ecosystems Maestro Munru; Meutia Samira Ismet; yoman Metta N Natih; Beginer Subhan; Nasrul Aziz
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4917

Abstract

Ecological conditions are shifting due to increased anthropogenic activities along coastal areas. These activities are affecting the life cycle of aquatic organisms, especially phytoplankton. This study, conducted in the unique ecosystem of Hurun Bay Lampung, aims to analyze the composition and structure of phytoplankton communities in eutrophic waters and water quality conditions. Sampling was conducted in two different months, August and October, by vertical hauling from a depth of 5 meters to the surface. The results revealed a rich diversity of phytoplankton, with 72 genera, 48 families, and 6 classes identified in August, and 55 genera, 42 families, and 6 classes identified in October. The diatom group was the most prevalent, accounting for over 90% of the total, with the highest abundance found in Skeletonema and Chaetoceros. The diversity, uniformity, and dominance indices were all in the low to medium category, indicating a balanced ecosystem.
Study of Hardening Process of AISI 1045 Steel Material with Variation of Heating Temperature, Media, and Cooling Media Volume for Shaft Application Heri Setiawan; Cecep Ruskandi; Abdul Latif
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4918

Abstract

Shafts are critical components in engines that facilitate power transmission and rotation. AISI 1045 steel is a cheap alternative for shaft manufacturing, but a proper selection of heat treatment parameters is required to optimize its mechanical properties. This research aims to study the process effect of heating temperature, type of cooling media, and volume ratio of cooling media on the hardness and wear of AISI 1045 material. The results show that the kind of cooling media significantly affects hardness and wear, while the heating temperature and cooling media volume ratio are not significant. The heat treatment process at 850°C with water cooling and a ratio of 12:1 resulted in a hardness of 60 HRC and a wear rate of 0.00335 grams. However, further studies on the tempering process and other parameter adjustments are required to achieve optimum performance.
Effect of Rocker Arm Variation on the Perfonmance of a Single Cylinder Petrol Engine Yuniarto Agus Winoko; Angga Setiawan
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4919

Abstract

The rocker arm functioned as a link between the camshaft and the valve which was responsible for regulating the rise and fall of the valve. Based on how it worked, the roller rocker arm with a conventional rocker arm were the same. However, a significant difference was seen in the roller placed at one end that made direct contact with the camshaft. The use of a conventional rocker arm produced considerable friction, so researchers replaced it with a roller rocker arm. The purpose of this study was to improve the performance of a single cylinder petrol engine using a roller rocker arm that had diameter sizes of 15 mm and 17 mm against the standard. The performance testing method used the variable open throttle to obtain data. Furthermore, the data was presented in graphical form and analyzed using anova. The independent variables were roller rocker arm whose diameter were 15 mm and 17 mm, conventional rocker arm and round 3000, 3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000 rpm. The dependent variables were power, torque and specific fuel consumption. The control variables were engine 100 cc and 92 octane fuel. The largest power result at 6500 rpm was 6.25 Hp using a conventional rocker arm. The largest torque at 3500 rpm was 7.23 Nm using a 15 mm roller rocker arm. The smallest specific fuel consumption was 0.1546 kg/Hpxh at 5000 rpm using a 15 mm roller rocker arm.

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