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Proceedings Conference on Marine Engineering and its Application
Published by Politeknik Perkapalan Negeri Surabaya
ISSN : -     EISSN : 26553333     DOI : https://doi.org/10.33863/cmea.v6i1.2426
Core Subject : Engineering,
Engineering Mechanical Engineering
The Proceedings of Marine Engineering and Its Application (CMEA) is an open-access publication, allowing global access for readers to publish, read, download, cite, and share the content freely. CMEA focuses on the dissemination of original ideas, innovative research, and practical developments contributed by scientists and engineers from both academic and industrial backgrounds. The journal welcomes a wide range of submissions, including theses, research articles, and review papers, covering topics in mechanical engineering, marine engineering, and related fields.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 109 Documents
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PENGARUH MULTI FEEDSTOCK 1 BIODIESEL DAN MULTI FEEDSTOCK 2 BIODIESEL TERHADAP UNJUK KERJA FOUR STROKE DIESEL ENGINE MENGGUNAKAN VARIASI PISTON CHAMBER Ahmad Rifqul Muzakki; Edi Haryono; Lely Pramesti
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2672

Abstract

Petroleum fuel is one of the fuels that is always used in combustion motors, especially in dieselengines so that abiotic natural resources are limited. Petroleum makes natural resources depleted, whiletransportation facilities and industrial activities are declining. One of them, the use of diesel, which is an abioticnatural resource that continuously in the transportation sector will one day run out, so the thing that needs to beconsidered is the alternative fuel that can be made, namely biodiesel. Biodiesel is a renewable fuel and is generallymade from biological sources (vegetable and animal) and is environmentally friendly. Raw materials from biodieselthat can be used are palm oil, olive oil, canola oil, hazelnut oil, and castor seed oil. In this research I will classify theseraw materials into 2 compositions of multi-feedstock.biodiesel. The first is Multi-feedstock 1 biodiesel contained frompalm oil, olive oil and canola oil. Meanwhile, Multi-Feedstock 2 biodiesel contains palm oil, hazelnut oil, and castorseed oil. The two Multi-feedstock compositions will then be mixed with HSD (Pertamina Dex) so that they become B20,B35, and B100 fuel which will then be tested on Four Stroke Diesel Engines with different piston variations. Whichlater in this study will test with a flat piston chamber then continue using the LSCS piston chamber. For lamp loading,it uses 1000 watt and also data capture using engine rotation variations of 900 rpm, 950 rpm, 1000 rpm, and 1050rpm.
Kajian Numerik Penerapan Turbin Hydrokinetic Darrieus Sebagai Wave and Current Energy Converter Dengan Variasi Sudut Serang dan Solidity Muhamad Agus Prasetyo M; Burniadi Moballa; George Endri Kusuma
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2673

Abstract

The ocean is the largest source of potential energy in Indonesian country, one potential thatcan be expoloites is energy from sea wave and current which can be alternative to meet national energyneeds, ocean wave and current energy includes EBT resources which is rarely explored. Ocean wave andcurrent energy conversion can be converted into electrical energy by use the movement of sea waterwave, hydrokinetic Darrieus tubine is a conversion tool that can be used to convert kinetic energy intomechanical energy, In this case study, used angle of attack and solidity variation of the hydrokineticDarrieus tubine were used, the wave data used is the Southern Waters of Java Island, which is preciselyat Tanjung Bili Beach, Malang. By ussing airfoil NACA 0018 and profile Darrieus turbine diameter of 1m. Produce RMS CT and CP values with the stable is found on the solidty variation 0,15 with angle ofattack 10o TSR 0,25 omega (?) 0,5 with RMS value of CT 0,1512 and CP 0,075.
Perencanaan Konfigurasi Layout Slipway Untuk Meningkatkan Kapasitas Winch Pada Galangan X Muhammad Irzam Amrizal; Adi Wirawan Husodo; Heroe Poernomo
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2674

Abstract

This research the planning of slipway layout configuration to increase the capacityof the existing winch at the shipyard. The slipway layout configuration includes several thingssuch as slipway layout, number of Pulleys turns, Pulley position, and ground conditions. Thisresearch aims to determine the maximum safe working load value of wire rope, the pullingforce of each ship that will be docking, and the appropriate number of turns on the Pulley. Theship variations used to plan the slipway layout configuration are 10813 DWT container ship,8200 DWT container ship and 7080 DWT cargo ship. Variations are made to determine thenumber of Pulley requirements and Pulley windings for each ship that will be docked. Themaximum force calculation results show that the 10813 DWT container ship requires 13 Pulleywindings. while the 8200 DWT container ship requires 11 Pulley windings. The 7080 DWTship requires 9 Pulley windings. In planning the slipway layout configuration to increase thewinch capacity, 1 Pulley is added to the fixed pulley and 1 Pulley to the moving Pulley so that13 turns are obtained.
Studi Numerik Pengaruh Sudut Kemiringan Push Nozzle pada Air Curtain Terhadap Pola Aliran Push-Pull Ventilation Muhammad Rafli Syahrizal R; Burniadi Moballa; Agung Purwana
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2675

Abstract

COVID-19 cases will continue to spread throughout the world until 2023, including inIndonesia, and have many negative impacts, especially for the industrial world because it is difficultto enforce a minimum distance of 1-2 meters between employees. One technology that has highpotential to be applied is the air curtain. This journal analyzes push-pull ventilation to protectworkers from microdroplet inhalation. In this study, two variations of the push-pull ventilation speedratio (Vs/Vb) were used, namely 4 and 6. As well as using a variation of the push nozzle slope, namely10°. In this study, running was carried out with two models, namely modeling without a mannequinand with a mannequin. To complete this research, simulations were carried out using theComputational Fluid Dynamics (CFD) method using Salome, OpenFOAM, and ParaView software.So, the results obtained in modeling without a mannequin, the speed ratio of 6 is the most optimalratio with the least amount of average discharge that goes out of bounds, namely 0.582 m3/s. Whilethe results of the push-pull modeling with the mannequin show that no droplets penetrate the aircurtain at all variations of the velocity ratio, the velocity ratio of 6 is the velocity ratio that has aover-blow flow pattern that is very effective in holding down spray from droplets.
PENERAPAN METODE EARNED VALUE ANALISIS (EVA) PADA PROYEK REPARASI KAPAL Silas Tandi; Arie Indartono; Arum Nurvitasari; Dodiek Kurniawan
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2676

Abstract

Delays in completing the project are things that must be avoided, because in addition to adversely affectingthe credibility of the contractor, it also causes losses in terms of project time and cost or cost overrun, where the workdone is not in accordance with the planned time and the cost is not in accordance with the budgeted so that it requiresadditional costs to complete the project. The Earned Value method is a method used to manage project costs andschedules in a structured manner. This method can provide information on the status of project performance in a reviewperiod and information on predicted costs and time for completion of all work based on performance indicators at thetime of review. Project performance on ship repair TB. Big Fair 15 from the calculation of CV and SV in reviews 1, 2and 3 is negative and so is the calculation of CPI and SPI in reviews 1, 2 and 3 is negative or less than 1. This indicatesthat the cost used to complete the project is greater than the plan. However, for the 4th review, the results of the CVand SV calculations show a positive value, which means that the cost of completing the project is in accordance withthe plan as well as the CPI and SPI at the 4th review show a positive value, which means that the cost of completingthe project is in accordance with the plan. Based on the analysis that has been done, the time required to complete theremaining work is 10 days and in this ship repair project there is a cost overrun of Rp. 107,332,706 with a cost budgetof Rp. 459,273,994. After a review using Earned Value Analysis, the results are obtained for each review, where review1 weighs 12.93% at a cost of Rp. 73,267,561 and review 2 weighs 45.17% at a cost of Rp. 255,915,724 and review 3weighs 26.58% at a cost of Rp. 86,839,784.
Analisis Perancangan Pipa Gas Buang Diesel Generator Pada Konversi Kapal Chemical Tanker 6200 DWT menjadi PLTD Terapung Della Al Bilatri Wahyu S; George Endri Kusuma; Pekik Mahardhika
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2677

Abstract

- The construction of the Floating Diesel Power Plant (PLTD) is one of the government'sefforts to overcome an uneven distribution of electrical energy in Indonesia. The Floating PLTD is aconversion of a 6200 DWT chemical tanker with 2 main engines into 6 Wartsila 12V32 dieselgenerators as power plants. Due to the conversion, several new piping systems are needed withlimited space due to the dimensions of the ship. This research focuses on planning the exhaust gaspiping system of each diesel generator. Planning includes pipe routing, insulator thicknessdetermination, back pressure and pipe stress analysis. Based on manual and software calculations,the insulator thickness used is 40 mm with an efficiency of 68% to 94%. The results of back pressureanalysis in each design using the Darcy-Weisbach method and software show an eror of 4,36% to13,15% with an average back pressure below the maximum limit of 4.246 kPa. The results of the pipestress analysis show that the ratio between the stress value that occurs and the maximum allowablevalue is less than 1, with an average stress due to fixed load of 0,065, stress due to thermal load of0,787, and hoop stress of 0,058. Based on the results of the back pressure and pipe stress analysis,the design is acceptable and safety.
Simulasi Numerik Pengaruh Variasi Sudut Silinder Sirkular di Depan Returning Blade Terhadap Performa Turbin Angin Savonius Overlap Naffatsa Alza Wiyoga; Priyo Agus Setiawan; Emie Santoso
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2678

Abstract

Previous experiment has been carried out on Savonius wind turbine with additionaloverlap ratio and variation of circular cylinder stagger angle to improve its performance.However, the experiment didn’t show flow visualization around the turbine. Therefore,numerical simulation using Computational Fluid Dynamics (CFD) method must be carried outto validate the experiment result and obtain the best performance and flow visualization ofoverlap Savonius wind turbine. The turbine simulated has an overlap ratio of 0,3. Then, thecircular cylinder is placed in front of returning blade with a distance ratio (S/d) 1.7 andvarious stagger angle of 45 ?, 50 ?, 55 ? and 60 ?. The flow velocity used is 5 m/s. Turbulencemodel used in this simulation is k-epsilon realizable with transient pressure based. The finalresult is overlap Savonius wind turbine with circular cylinder has increased its performance of31,56 % compared with overlap Savonius wind turbine without circular cylinder. The bestperformance occurs at 55 ? circular cylinder stagger angle in front of returning blade with0,4118 Coefficient of Power (Cp) value. The flow visualization shows that 55 ? circular cylinderstagger angle is able to create the most optimum nozzle effect.
Analisis Kekuatan dan Umur Kelelahan (Fatigue Life) Terhadap Pondasi Crane SWL 3,6 Ton pada Kapal LCT 31 Meter dengan Metode FEM (Finite Element Method) Achmad Masykurozi; Adi Wirawan Husodo; Benedicta Dian Alfanda
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2679

Abstract

– LCT is are transport vessels that can approach platforms and jetties. LCT vessels are equippedwith cranes to facilitate the delivery and transfer of accommodation needs on the ship. Therefore, it isnecessary to plan a crane foundation that can withstand the weight of the crane itself and the load liftedby the crane. The 31-meter LCT ship suffered damage to the crane foundation due to static loads, so it isnecessary to replace the new crane foundation. In this Final Project, we will analyze the strength andfatigue life of the 3.6 ton SWL crane foundation on a 31-meter LCT ship in order to minimize the risk ofwork accidents and estimate the fatigue life of the new crane foundation. To complete this Final Project,the method used is the finite element method by creating a model in AutoCAD 2016 software and analyzingit in the finite element method software. The results of the analysis show that the von mises stress thatoccurs is 124.53 MPa, while the maximum deflection that occurs is 1.54 mm and the safety factor valueis 1.525. These stresses and deflections are in accordance with BKI rules because they do not exceed theallowable stress of 190 MPa and the allowable deflection of 2.75 mm. And for the estimated fatigue lifeof the crane foundation of 28.62 years.
RANCANG BANGUN MODIFIKASI PAD EYE PADA GALANGAN Maulana Muslim Dianto; Budi Prasojo; Subagio Soim
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2680

Abstract

The function of the pad eye provides a point where the pulley can be hooked directly accordingto the design. The pad eye is installed by welding on the desired area. In the process of installing the padeye, there are obstacles experienced, for example in the installation of the pad eye which takes time dueto the improper welding and welding process. The pad eye modification was carried out to make it easierto do the installation quickly. The pad eye modification has a clamp that can be adjusted in widthaccording to the support. The first step of this pad eye modification is modeling to find out the appropriatedesign on the support, after which material selection is carried out. Followed by the calculation ofallowable stress, tensile and shear. After the calculation results meet the safety criteria, proceed withtesting the pad eye modification using a load cell. The calculation obtained is the largest tensile stress of18.387 MPa, the largest shear stress of 45.969 MPa of the two stresses compared to the permit stress of72 MPa, so it can meet the safety criteria. The bolt strength value is 7.661 MPa from these resultscompared to the permit voltage of 60 MPa. The calculation results show that the pad eye modificationconstruction meets the safety criteria. In strength testing, it is concluded that the pad eye modification isable to lift loads from 500kg to 1500kg.
Analisis Kekuatan Dan Kelelahan Konstruksi Pondasi Mesin Kapal General Cargo 6088 GT Nina Bonita; Adi Wirawan Husodo; Heroe Poernomo
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2681

Abstract

A ship inspection outside the inspection schedule is called an additional inspection.The 6088 GT general cargo ship conducted an additional inspection because the mainengine failed to operate and replaced the wuxi antai power X8320ZC4B-1 engine weighing26700 kg with a yanmar 8N330-WU engine weighing 43000 kg. It is necessary to recalculatethe strength of the main engine foundation. Because the main engine foundation is thestructural support of all the loads above it including the engine itself. After the calculation ofstrength, it is necessary to calculate fatigue, after calculating the fatigue of the main enginefoundation, the estimated age of the engine foundation will be known so that the owner canschedule a replacement according to the ship's inspection schedule. In completing this FinalProject, the method used is the finite element method with input 3D modelling of thefoundation and its loading conditions in the Finite Element Method software. The results ofthe analysis can be seen from the load given of 421400 N with variations in the main engineat 100% rpm conditions and at service speed, the maximum stress obtained is 39.935 MPawith a permit stress value of 230 MPa, while the maximum deformation that occurs is 0,097mm with a permit deflection value of 12.300 mm. Then obtained a cycle value of 82129000,the estimated fatigue life of the main engine foundation is 25.65 years

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