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All Journal International Journal of Marine Engineering Innovation and Research
Irfan Syarief Arief
Institut Teknologi Sepuluh Nopember
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

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Analysis Of Magnus Effect Toward The Shaft Of Vetical Axis Hydro Turbine H-Darrieus Irfan Syarief Arief; Amiadji; I Putu Gedhe Adhi Darsana; Achmad Baidowi
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 4 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.5091

Abstract

One way to fight climate change is making a transition from fossil fuel powered energy into renewable energy. In Indonesia the government have the national energy mix prediction which state that in 2050 58% Indonesian energy source will be renewable. The biggest source of renewable energy in Indonesia come from marine source. One sources of marine energy are tidal currents that can be harness by using hydrokinetic turbine. The goal to be solved is to determine the effect of magus force toward the turbin shaft. Shaft rotation speed and fluid velocity will be determined as the variation. The method used is computational fluid dynamic using fine marine numeca software to determine magnus force magnitude and mdsolids software to calculate the maximum bending moment after the magnus force applied. The results is magnus force just increase the minimum required diameter of turbine shaft by 0.26% and the corresponding safety factor is 1.889 more than 1.0 thus there is no need to replace or strengthen the existing turbine shaft.
Thrust and Torque Analysis on Propeller C4-40 with The Addition of Kort Nozzle to Pitch Variation Irfan Syarief Arief; Achmad Baidowi; Maria Ulfa
International Journal of Marine Engineering Innovation and Research Vol. 6 No. 3 (2021)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v6i3.5842

Abstract

At this time there are various types of propellers, one of which is the CPP propeller (Controllable pitch propeller). The CPP propeller can change pitch angles, and at certain pitches it can pull the ship backwards without having to change the rotation. But keep in mind that the CPP has only one pitch design where changing the pitch position means reducing the efficiency of the propeller. So it takes a kort nozzle to increase efficiency. The addition of a kort nozzle is one of the developments of an Energy Saving Device (ESD) which in addition to increasing efficiency it is also able to increase the thrust. Problem formulation of this research is to find out changes in thrust, torque and efficiency on the propeller CPP C4-40 after the addition of kort nozzle 37. This research begins with determining the dimensions of the propeller, also the types and dimensions of the nozzle. Then the design and drawing of the propeller C4-40 with a kort nozzle 37 was carried out for pitch changes of 0°, 22.5° and 45°. The next step is a meshing process where each pitch the number of meshing ranges from 2.3 to 3.5 million cells. The last step is to simulate the performance of the propeller with the nozzle using software based on Computational Fluid Dynamic. From this research, it can be concluded that the addition of kort nozzle 37 on the propeller C4-40 changes the thrust, torque and efficiency values significantly. Thrust only increased at pitch 0° J 1.4 and pitch 22.5°. The greatest increase in thrust at pitch 22.5° J 0.6 is 88.74%. Torque is reduced except for pitch 0° J 0.8-1.4. The biggest decrease in torque at pitch 45° J 1.2 is 83%. Meanwhile efficiency has decreased at all pitch angles. Where the biggest decrease in pitch 45° J 1 is 99.83%.
Analysis of the Effects from Adding Propeller Boss Cap Fins to Skewed Propeller Performance With CFD Methods Irfan Syarief Arief; Achmad Baidowi; Anson Novendra Pradana
International Journal of Marine Engineering Innovation and Research Vol. 6 No. 2 (2021)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v6i2.5850

Abstract

Fuel accounts for the majority of the ship's operating costs. Increased propeller efficiency can help to reduce fuel usage. The higher the efficiency, the less energy is wasted. Ships with high propeller efficiency may be able to provide more thrust while using less fuel. Propeller Boss Cap Fin (PBCF) installation is one of the solutions for improving propeller efficiency that is ideal for a submarine. PBCF may lower the submarine's energy usage, allowing it to recharge its batteries less frequently. According to certain studies, PBCF can boost propeller efficiency by 7% while lowering noise levels by nearly 6 decibels (dB). The impact of PBCF phase lag variation on skewed propeller performance and flow will be the subject of this article. CFD simulation using phase lags of 0, 12.86, 25.72, and 38.58 will be used in the study. The simulation shows that PBCF can improve propeller efficiency while lowering propeller torque. Even though all phase lag modifications show a reduction in propeller thrust. On its hub vortex, they also reveal the existence of distraction.
Effect of Main Engine Placement and Propeller Shaft Inclination on Ship Performance Agoes Santoso; Irfan Syarief Arief; Ngizuddin Masro’i; Semin
International Journal of Marine Engineering Innovation and Research Vol. 6 No. 1 (2021)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v6i1.5857

Abstract

Placement of the ship propulsion system components might also affect the value of the ship's resistance and thrust. Included in the placement of the ship's propulsion system components are the placement of the main engine and propeller shaft inclination. Changes in the placement of the main engine will affect the location of the center of gravity of the ship which affects the trim and the amount of resistance of the ship. While propeller shaft inclination will affect the direction of thrust produced by the propeller. In this research, an analysis of how big the effect of the placement of the main engine and the propeller shaft inclination on various angles for the 60 GT fishing vessel on the ship's performance by using simulation. Simulations were performed with Numeca Fine Marine software using the Actuator Disk Propeller method. Propeller shaft inclination variations are 1°, 2°, 3°, and 4°. At each propeller shaft inclination, there are two variations of the placement of the main engine at a distance of 4m-6.5m from the AP and 5.5m-8m from the AP. Based on the results of the simulation that has been done, the greater the angle of the propeller shaft inclination, the more resistance value will be even smaller, and the thrust produced is also smaller. When the main engine is shifted towards FP, the resistance value will be greater, and the thrust generated is also greater. The most optimal conditions are on the rake of the propeller shaft 4° and the main engine position 4m-6.5m from the AP, the total resistance value of the ship = 9648.97 N and the thrust = 16520.66, torque = 1867.46, KT = 0.1569, KQ = 0.0177, J = 0.2827 and propulsion efficiency = 0.3991. This configuration was chosen because to make the ship move at the same speed, the configuration requires less power.
Analysis of Energy Efficiency of Rotate Flettner Rotor Based on Variation in Wind Direction and Rotor’s Material Jürgen Siegl; Irfan Syarief Arief; Akbar Rizqi Hartawan
International Journal of Marine Engineering Innovation and Research Vol. 5 No. 2 (2020)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v5i2.6009

Abstract

Flettner rotor is a cylindrical object which installed vertically on the ship's body. It rotates on its axis to utilize the airflow from the wind and help the ship to generate additional thrust force by using the principle of magnus effect. This additional thrust force produced by the flettner rotor helps to reduce the fuel consumption which used as an energy source for the main or auxiliary engine. However, the flettner rotor has possibilities to operate in a certain different condition which can affect the efficiency of the flettner rotor usage. The discussion is to find out how much power is needed to rotate a rotor based on the variation of the material being used, how does the wind direction affect the performance of the flettner rotor as an alternative ship propulsion system, how does the energy efficiency get affected by the variation of material and the wind direction. From the discussion of this bachelor thesis, it is concluded that aluminum is the material that requires the least power to rotate a flettner rotor with 77,2276 kW on the speed of 14.4 rad/s and it gives its maximum contribution when the wind direction towards the flettner rotor is coming through the port side of the ship with the angle of 90 ° and the flettner rotor rotates in clockwise direction. It is also concluded that the best configuration of flettner rotor to produce a good energy efficiency are by using aluminum as the rotor’s material, having wind that coming through from the angle of 90°, and the flettner rotor rotates at 14.4 rad/s with apparent wind speed at 7.2 m/s. This configuration can save fuel consumption of the ship up until 570.768 kg on 5000 km voyage.
Analysis Of Stress Distribution Connection System To Knock Down River Ferry Edi Jadmiko; Irfan Syarief Arief; Cahyo Putro Indro Suseno
International Journal of Marine Engineering Innovation and Research Vol. 2 No. 2 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v2i2.6118

Abstract

Musi river is a wide and very long river used by local citizen for the fro. Water transportation remains the choice of local citizen though other infrastructure was built. Hence today, water transportation remains best choice because it has better time compared to landline.. This research aims to get simple solution which is quite good, effective, and quick when needed, then author made Knock Down River Ferry design. Knock Down River Ferry consists of certain size pontoon. Of course this ferry have advantages in moving and assembling. This pontoon can easly assembled in few day and various river width. In this Research there is problem identification and formulation about pontoon joints design of the ferry so force can distributed evenly when receive load.. The analysis process obtained the strength of the lock with the variety conditions of the ships, the largest stress lies on the lock number 10 on the ship moving conditions with a speed of 8 knots for 31.85 MPa with safety factor 8.635 and the lowest on the lock number 1 on the floating condition with stress for 0.91 MPa.
Damage Analysis of Elbow Fitting at Condenser Air Conditioning Cooling System Hari Prastowo; Irfan Syarief Arief; Hamzah Fansyuri
International Journal of Marine Engineering Innovation and Research Vol. 1 No. 4 (2017)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v1i4.6163

Abstract

Elbow fittings is one type of fitting on the piping installation that serves to change the flow direction. With the sudden flow of changes, it will affect the physical condition of the elbow. The flow changes in the elbow will result in changes of flow velocity that affect wall of elbow, the condition will cause erosion corrosion phenomenon. Erosion corrotion is a type of corrosion that uses a mechanical process through the relative movement of the flow and metal. Corrosion erosion can also be caused by impingment corrotion or very rapid flow movement. This study aims to determine the cause of damage elbow by using a CFD simulation and troubleshooting by adding a Vortex Generator or a installed disturber system in the pipeline installation and simulating it again. From the results of research conducted that elbow damage caused by high flow velocity that concerns the outer elbow. The addition of Vortex Generator is proven to be used to reduce excessive flow velocity on erosion-corroded parts. According to the results of the investigation the placement of the most efficient vortex generator if placed at a distance of 0.1 R from elbow inlet.
Horizontal Pendulum Performance Analysis with Multilevel Model Plate on Ocean Wave Electric Power Plant (PLTGL) Mukhtasor; Tony Bambang Musriyadi; Irfan Syarief Arief; Ardika Wendy Cahya Saputra
International Journal of Marine Engineering Innovation and Research Vol. 1 No. 2 (2017)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v1i2.6228

Abstract

With the times and the industry, the energy sources such as fossil fuels dwindling. It encourages all parties to be more advanced and developed by creating solutions to renewable energy generation with the latest innovations, one of which is the sea wave power plant - pendulum system. Ponton who uses pendulum system is one tool used to convert from ocean wave energy into electrical energy. In this study using the test conditions without using ballast onshore and off-shore testing with the ballasts. Obtained from testing the many rounds that can be generated pendulum pie plate thickness and the angle of the pontoon. To test the largest on-shore power obtained on the test using arc angle 30°, 3 mm thick, the angle of 60o power produced 0036 watts. For testing offshore in the ballasts 12 cm, 15 cm, 17.5 cm, the largest power generated at 15 cm ballasts with 0041 watts power on pie, thick, and a tilt angle equal to the on-shore testing. Number of rounds with time, the on-shore testing that produces the greatest value in the segment with an angle of 30 °, a thickness of 3 mm the angle of 60o value obtained 0.938 rad/s. In the off-shore pengjuain is greatest in the ballasts 15 with 0847 rad/s.
Co-Authors Achmad Baidowi, Achmad Agoes Santoso Akbar Rizqi Hartawan Amiadji Anson Novendra Pradana Ardika Wendy Cahya Saputra Cahyo Putro Indro Suseno Edi Jadmiko Hamzah Fansyuri Hari Prastowo I Putu Gedhe Adhi Darsana Jürgen Siegl Maria Ulfa Mukhtasor Ngizuddin Masro’i Semin Tony Bambang Musriyadi