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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Journal of Mechanical Engineering Science and Technology INVOTEK: Jurnal Inovasi Vokasional dan Teknologi INOVTEK POLBENG Wave: Jurnal Ilmiah Teknologi Maritim Specta Journal of Technology International Journal of Marine Engineering Innovation and Research Construction and Material Journal Jurnal Riset Teknologi Pencegahan Pencemaran Industri Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Maritime Park: Journal Of Maritime Technology and Socienty PIKAT Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) Collaborate Daily Book Series WAVE: Jurnal Ilmiah Teknologi Maritim
Rodlian Jamal Ikhwani
Institut Teknologi Kalimantan
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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Effect of Temperature Variations of Corn (Maize) Oil Biodiesel on Torque Values and Thermal Efficiency of Diesel Engines Suardi, Suardi; Ikhwani, Rodlian Jamal; Aulia, Ade Putri Rezki
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 7, No 1 (2023)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v7i12023p087

Abstract

The trend of consumption of hydrocarbon fuels in Indonesia, which is increasing every year, is not accompanied by the amount of production, which is decreasing. Alternative fuels to reduce dependence on hydrocarbon fuels. One form of alternative fuel is biodiesel, which is made from corn (maize) oil. Corn oil itself, if processed, can be an option for clean and environmentally friendly energy option and that is the main objective of this research is to determine the performance of biodiesel corn oil on diesel engines. The method used in this study is an experimental method where corn oil biodiesel is tested directly on a testing machine. The data from the test results will be used to find the torque and thermal efficiency values so that the engine performance values for each fuel variation can be identified. The results of the study obtained the engine performance value, namely the highest torque was on diesel oil fuel 4.57 N.m. The highest thermal efficiency value achieved at the B30 fuel sample at a temperature of 60 °C with the thermal efficiency of 17.4 percent. With these results, it can be concluded that engine performance with corn oil fuel can be used as an alternative fuel to replace hydrocarbon fuel.
Impact of Hull Breadth Modification on Tugboat Resistance: A Comparative Analysis Using Holtrop and CFD Methods As’ad, Miftachus Surur; Pawara, Muhammad Uswah; Ikhwani, Rodlian Jamal; Wulandari, Amalia Ika
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1062

Abstract

Estimating resistance experienced by a ship is crucial for determining the required engine power and fuel consumption to maintain a required speed. This study examines the comparative effects of altering the breadth of a tugboat from the approved initial design of 9 meters to a modified design of 8.6 meters, both utilizing the same engine power of 2x1018 HP. The analysis employs the Holtrop method, and Computational Fluid Dynamics (CFD). Using the Holtrop method, the largest differences at a speed of 14 knots were found to be 11.577 kN in resistance, 198.66 HP in engine power, and 0.617 g/kW.h in Specific Fuel Oil Consumption (SFOC), corresponding to a 5.141% difference in engine load. CFD results indicated the largest differences at 10 knots, with 9.009 kN in resistance, 102.47 HP in engine power, and 3.192 g/kW.h in SFOC, translating to a 5.034% difference in engine load. The modification of the breadth by 0.4 meters, while keeping the engine constant, impacts the resistance, engine power, and fuel consumption of the vessels.
Comparative Analysis of Installed and Actual Pump Power in Bilge and Ballast Systems: Study Case on 60 m Buoy Laying Vessel Rodlian Jamal Ikhwani; Nurcholik, Samsu Dlukha; Saputra, Muhammad Rizky; Hidayat, Taufik; Syahab, Husein
Indonesian Journal of Maritime Technology Vol. 2 No. 1 (2024): Volume 2 Issue 1, June 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i1.1198

Abstract

The piping system of a ship is an essential system that is crucial for the ship's operation. An example of tasks related to the ship's piping system is the design of the system itself. When designing a piping system, certain assumptions are made in calculating the pump power. As a result, the installed pump power is often greater than the actual pump power needed. In this thesis, the actual pump power in the bilge and ballast piping system of a 60 m buoy laying vessel needs to be analyzed. To achieve this, comprehensive and detailed data collection of the piping system is required. Then, the piping system must be drawn in full detail using 3D software to match the actual installation of the piping system. After that, the actual pump power for the piping system can be calculated. The calculated pump power is 5.79 kW, with the pump specifications being an centrifugal pump model with an output of 7.5 kW, chosen due to selecting a pump power approximately 16% lesser than the existing power.
Design and Implementation of Solar Cells as an Alternative Power Source for Pinisi Ships Suardi, Suardi; Maulana, Mohammad Khafid; Ikhwani, Rodlian Jamal; Pawara, Muhammad Uswah; Mahmuddin, Faisal; Tasrief, Muhdar
Computational And Experimental Research In Materials And Renewable Energy Vol 7 No 2 (2024): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v7i2.52111

Abstract

The Pinisi is a traditional Indonesian ship recognized as a maritime cultural masterpiece and remains widely utilized, particularly in liveaboard tourism. The increasing demand for sustainable and innovative energy solutions in the tourism and maritime industries highlights the relevance of adopting solar cells as an alternative energy source for lighting on these ships. Solar cells, primarily made from silicon, efficiently convert solar radiation into electrical energy. This study evaluates the feasibility of using solar cells to power lighting systems on Pinisi ships operating in the Selayar Islands. Solar radiation data from NASA Surface Meteorology was utilized to estimate the optimal power output of solar modules. The analysis indicates that 10 solar cell modules can generate an energy output of 19.480 kWh, sufficient to meet the ship's lighting requirements. Configurations were optimized for different decks, ensuring efficient energy distribution while maintaining sustainability. The findings demonstrate that implementing solar cells on Pinisi ships not only fulfills their energy needs but also supports the maritime tourism industry by providing an eco-friendly and innovative energy solution. This approach contributes to the preservation of maritime heritage while addressing contemporary environmental challenges.Keywords: Pinisi ship, solar cells, energy conversion, maritime tourism innovation
CAD Technology Workshop with the Pierre Bougher Approach in Building Traditional Wooden Ships at Kelompok Usaha Bersama (KUB) Nenang Berlayar North Penajam Paser Hariyono, Hariyono; Ikhwani, Rodlian Jamal; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian
Indonesian Journal of Maritime Technology Vol. 2 No. 2 (2024): Volume 2 Issue 2, December 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i2.1279

Abstract

Program in the form of a CAD Technology Workshop using the Pierre Bouguer approach aims to improve the skills of traditional wooden ship craftsmen in the Kelompok Usaha Bersama (KUB) Nenang Berlayar, Penajam Paser Utara. This activity introduces Computer-Aided Design (CAD) technology as a modern solution to increase the precision, efficiency and quality of wooden ship designs without eliminating traditional values. Pierre Bouguer's approach which focuses on the stability and balance of the ship through drawing lines plans was applied to produce a better design from a technical and safety perspective. Implementation methods include intensive training, technical assistance, and ongoing evaluation, supported by lecturers and students from the Kalimantan Institute of Technology (ITK). The results of the activity showed a significant increase in craftsmen's understanding and ability to use CAD, as seen from the post-test results of participants who achieved an application level above 90%. This program not only helps craftsmen adopt modern technology but also creates a sustainable learning ecosystem through an online-based community. It is hoped that the application of CAD technology can encourage innovation in traditional wooden shipbuilding, increase competitiveness, and provide added economic value for craftsmen amidst the challenges of modernizing the maritime industry.
Analysis of Gross Tonnage (GT) Capacity Installed On Traditional Wooden Ships In Penajam Paser Utara Manik, Aljoiden; Arifuddin, Andi Mursid Nugraha; Pawara, Muhammad Uswah; Nurcholik, Samsu Dlukha; Ikhwani, Rodlian Jamal
Indonesian Journal of Maritime Technology Vol. 1 No. 2 (2023): Volume 1 Issue 2, December 2023
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v1i2.1059

Abstract

To identify the GT of traditional wooden boats built at PPU, an investigation of the GT on the boat is carried out. The GT of the North Penajam Paser traditional wooden ship was identified using domestic regulations issued by the government through the Ministry of Transportation, PM No. 45 of 2021 and PP No. 85 of 2021 concerning PNBP of the Directorate General of Sea Transportation. Before being operated, every ship must be measured to determine the length, width, depth and tonnage of the ship in accordance with the ship measurement method. According to Law number 20 of 1997, "Non-Tax State Revenue (PNBP) is all Central Government revenue that does not come from revenues taxation". ship data studied for determining gross tonnage, Lpp: 17.76m, LoA: 21.90 m, Lwl: 19.06m, B: 4m, H: 2m, T: 1.40m, Cb: 0.50. Calculating ship tonnage or calculating gross tonnage and net tonnage has two methods, namely the empirical method and the analytical method. The analytical ship GT value is 14.16 and the empirical ship GT is 14.79. The total amount of PNPB on ships based on analytics is IDR 5,600,704.74. The total empirical PNPB amount is IDR 8,43,031.01. The difference between analytical and empirical PNBP is IDR 242,327.01. The difference between GT based on analytical and GT empirical methods is 0.63. the comparison level between the two methods is 4%.
The General Arragement of Water Bus on Mahakam River's Alamsyah, Alamsyah; Pawara, Muhammad Uswah; Ikhwani, Rodlian Jamal; Sitorus, Chris Jeremy Verian; Kumandang, Niti Gede
Maritime Park: Journal of Maritime Technology and Society Volume 4, Issue 3, 2025
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.vi.44430

Abstract

Mahakam River has its own place in the hearts of domestic and foreign tourists. The beauty of the Mahakam river can be enjoyed by using a water bus made of wood. Currently, there are 2 (two) water buses available on the Mahakam river to serve tourists who want to explore its beauty. It was found that the water bus did not meet adequate safety and seaworthiness standards. Referring to the mission of the Tourism Office of the city of Samarinda, namely increasing the development of tourist destinations in the city of Samarinda, the renewal of tourist water buses that are adequate and in accordance with the standards of feasibility and safety is something that is really needed. The purpose of this study is to provide an alternative to the existing water bus design as an effort to rejuvenate the tourism fleet operating on the Mahakam river. The research stages include designing a general arragement for a tourism water bus that produces data in the form of main dimensions, hull form coefficients, lines plan, general arrangement, 3D design, and ship accommodation interiors. The results obtained are the main size of the ship with the following details; L = 14.04 m, B = 5 m, H = 1.4 m, T = 1.1 m, Vs = 10 knots, Engine Power = 87.4 HP (For 2 Engines), Number of Passengers and Crew = 80 Persons. Initial stability was found to meet the criteria.
ANALISA KEKUATAN KONSTRUSKI DOUBLE BOTTOM KAPAL AKIBAT PERUBAHAN UKURAN MANHOLE SEBAGAI UPAYA UNTUK MENINGKATKAN KESELAMATAN PELAYARAN DI ALKI II Jamal Ikhwani, Rodlian; Hariyono, Hariyono; Mujib Syadzali, Abdul; Alamsyah, Alamsyah; Syahab, Husein
Construction and Material Journal Vol. 7 No. 2 (2025): Construction and Material Journal Vol. 7 No. 2 Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i2.7858

Abstract

This study analyzes the strength of the ship's double bottom construction due to changes in manhole size to improve shipping safety in Indonesian Archipelagic Sea Lane II (ALKI II). The study was conducted at Taboneo Anchorage, South Kalimantan, which is a busy shipping route. The initial stage includes measuring the ship's structure and tidal data, as well as collecting secondary data in the form of construction drawings and material specifications for General Cargo type ships. Next, structural modeling was carried out using the Finite Element Method (FEM) approach with reference to Indonesian Classification Bureau (BKI) Rules 2025. The cargo load and bottom load were calculated and input into the model. Three variations of manhole sizes were tested: 350 x 450 mm, 400 x 600 mm, and 400 x 800 mm. The simulation results show that at 350 x 450 mm, the maximum stress is 111.23 N/mm² and the displacement is 4.9 mm, still safely below the BKI permit limit (150 N/mm²). At a size of 400 x 600 mm, the stress increases to 124.68 N/mm² with a displacement of 5.32 mm, which remains safe and recommended. However, the size of 400 x 800 mm produces a stress of 283.23 N/mm² and a displacement of 9.79 mm, exceeding the allowable limit and thus risking structural failure. The maximum recommended manhole size is 400 x 600 mm to maintain construction strength and navigation safety in ALKI II.
A Finite Element Analysis of Bottom Structure of LCT Converted from SPOB Pawara, Muhammad Uswah; Alamsyah, Alamsyah; Kusuma, I Putu Arya; Wulandari, Amalia Ika; Ikhwani, Rodlian Jamal; Arifuddin, Mursid Nugraha
Maritime Park: Journal of Maritime Technology and Society Volume 2, Issue 1, 2023
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.v2i1.25130

Abstract

SPOB (Self-Propelled Oil Barge) ship is useful for transporting oil. Due to certain requests, the owner and operator have converted SPOB into LCT. If before the conversion the ship transported oil, now the ship is transporting vehicles or heavy equipment on the deck. after the transfer of function from a SPOB ship to an LCT (Landing Craft Tank) ship, the cargo transported is different, the bottom is the part that is submerged in the water, so this part is vulnerable. Therefore, it is necessary to systematically predict the weight of the load that can be held by the ship at the bottom, this is so that there is no damage to the structure at the bottom of the ship which can harm the company from the ship owner. The purpose of this study is to find the maximum stress and strain that can be accepted by the ship and the value of the stress ratio (safety factor) in the bottom construction using the finite element method. The results obtained from the maximum stress and strain of the ship after and before conversion of 96.349Mpa, 272.56 Mpa, and 0.0013628 mm, 5.042 x 10-4 mm, safety factor according to BKI after and before conversion obtained 3.624 and 1.057, the safety factor according to the material criteria is 3.685 and 1.172, respectively, for the maximum deformation of the ship, the safety factor is 6.328 and 3.287 respectively
Evaluation of Diesel Engine Performance Using Biodiesel from Cooking Oil Waste (WCO) Suardi, Suardi; Setiawan, Wira; Nugraha, Andi Mursid; Alamsyah, Alamsyah; Ikhwani, Rodlian Jamal
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 14 No. 1 (2023): May
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2023.v14.no1.p29-39

Abstract

The increasing use of fossil fuels will cause the world's oil reserves to be depleted. In this case, it is necessary to increase the use of alternative renewable fuels, one of which is biodiesel waste cooking oil (WCO). The method used is an experimental test with a mixture of used cooking oil biodiesel and fuel. Before testing, the temperature of each fuel is increased to determine the effect of temperature on the density and viscosity values. The highest density value is found in B50 fuel at 26 °C, with a density of 0.854 gr/ml, while the lowest density is found in diesel fuel at 60 °C, with a density of 0.822 gr/ml. The highest viscosity value is found in B50 fuel at 26 °C and 60 °C, which is 3.26 cSt. After that, testing was carried out on a diesel engine, which produced the highest thermal efficiency value of 21.16% on B50 fuel with a temperature of 60 °C at 1000 rpm rotation and a load of 4000 watts. The lowest thermal efficiency of 6.43% was found in B50 fuel with a temperature of 26 °C at 800 rpm and a load of 1000 watts. The lowest consumption was found in B30 with a temperature of 60 °C at 1200 rpm, which was 420.78 gr/kWh. From the results of the tests that have been carried out, it can be concluded that the lower the density and viscosity of the fuel, the better the performance of the diesel engine on average. High temperatures effectively make the engine performance value better than normal temperatures (26 °C), and the performance of diesel engines is better with WCO fuel, especially in SFC.
Co-Authors ,, Alamsyah Abdul Mujib Syadzali Ade Ray Siahaan Agus Budianto Alamsyah Alamsyah - Alamsyah Alamsyah alamsyah alamsyah Amalia Ika Wulandari amalia ika wulandari Amalia Ika Wulandari Andi Mursid Nugraha Arifuddin Andi Mursyid Nugraha Arifuddin Andi Nadia Himaya Arifuddin, Andi Mursid Nugraha Arifuddin, Mursid Nugraha As’ad, Miftachus Surur Aulia, Ade Putri Rezki Chris Jeremy Verian Sitorus Christian Hendra Gonawan Faisal Mahmuddin Habibi Habibi Habibi Hariyono, Hariyono Irfan Fadillah Irvan Setiawan Kumandang, Niti Gede Kustiwansa, Harlian Kusuma, I Putu Arya Luh Putri Adnyani M. Uswah Pawara Manik, Aljoiden Mas`ud M, Ahmad Azwar Maulana, Mohammad Khafid Nugraha, Andi Mursid Pratama, Fernanda Wahyu Rahmasari, Nindy widia Devi Ratna Septati Yani Ryo Herlambang Samsu Dlukha N Saputra, Muhammad Rizky Siswahyudianto Suardi Suardi Syahab, Husein Syam, Muhammad Anjas Tasrief, Muhdar Taufik Hidayat Wardina Suwedy wulandari, amalia ika