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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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STUDI PENGARUH VARIASI BENTUK WAVE-PIERCING TERHADAP HAMBATAN PADA HIGH SPEED CRAFT (HSC) BERLAMBUNG KATAMARAN DENGAN SIMULASI COMPUTATIONAL FLUID DYNAMICS (CFD) Ahmad Hafizh Ridho; Eko Julianto; I Putu Arta Wibawa
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

Simulation on towing tank that require large costs, makes the ship’s owner have to pay moreto find their ship resistance value. Computational Fluid Dynamics (CFD) can be the substitution todetermine the resistance. This research discuss the effect caused by the variations application in wavepiercing forms on the MV. Saint John Paul II catamaran High-Speed Craft (HSC) at service speed tofind the smallest resistance value among them. The original model of the ship was obtained during TEEPresearch visiting program at National Taiwan University. 3D modeling on the wave-piercing variationswas using Rhinoceros6 software. Analysis to find the value of resistance was using CFD method withthe help of Orca3D and “SimericsMP+ForMarine” softwares. Variation was applied to the wavepiercing only, so it does not change the hydrostatic and stability of the initial model that has beenvalidated. Based on the transient CFD result at the speed of 38 knots, the researcher has obtained theaxe bow is having the smallest resistance value with 1101kN, followed by the raked bow, that have1126,35kN resistance value, and the original bow with 1137,7kN.
Analisa Pengaruh Sudut Serang dan Airfoil NACA 4 Digit pada Blade Axial Fan Mohammad Faishal Hanif; Muh Anis Mustaghfirin; Emie Santoso
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

Banyak pengaplikasian Axial Fan di bidang industri. Terutama untuk sistem ventilasi dan cooler suatu sistemyang lainnya. Untuk mendesain sebuah blade axial fan perlu designer untuk memperhatikan studi airfoil.Namun, tidak banyak tulisan yang membahas dalam tentang airfoil terutama pada kebisingan dan getaran yangdapat berdampak terhadap performa axial fan menggunakan metode komputasi atau dengan bantuan software.Penelitian ini melakukan analisa axial fan menggunakan metode komputasi atau dengan bantuan softwareANSYS CFX untuk mendapatkan nilai efesiensi, volume flowrate, rpm, dan tekanan. Dengan mendapatkan nilaiefesiensi, volume flowrate, rpm, dan tekanan dari setting angle dan airfoil yang tepat maka dapat dipilih dandilakukan untuk fabrikasi. Desain airfoil dipilih menggunakan bantuan software Designfoil R6.46 dan situs resmidari NACA (National Advisory Comitee for aeronautics). Desain axial fan di bentuk menggunakan softwareANSYS Geometry. Setelah mendapatkan semua desain 3D axial fan, desain tersebut di import ke dalam softwareANSYS CFX untuk mendapatkan data efesiensi, air flow rate, kebisingan, dan getaran
STUDI EKSPERIMEN MODIFIKASI RASIO KOMPRESI PADA 4-STROKE CARBURATOR SI ENGINE DENGAN DUAL-FUEL SYSTEM BENSIN-UAP ETANOL. Zainul Mujib; George Endri Kusuma; Mardi Santoso
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

Bahan bakar yang semakin berkurang maka dalam penelitian ini membahas tentang dual fuel system dimanaalternatif bahan bakar yang akan digunakan adalah etanol E98, dikarenakan nilai oktan etanol sangat tinggi makaperlu modifikasi pada rasio kompresi karena nilai oktan yang tinggi memerlukan rasio kompresi yang tinggi juga, agartidak terjadi adanya knocking, jadi pada pengujian kali ini akan dilakukan penambahan rasio kompresi dari kompresistandart mesin 9:1, CR 10,5:1 dan CR 11,5 sedangkan penambahan uap etanol pada penelitian ini di modifikasikandengan bukaan katup yaitu bukaan 0°, 30°, 60° dan 90°. Menaikkan kompresi rasio terdapat beberapa cara dimanasalah satunya dengan metode dom piston seperti yang akan dilakukan pada penelitian ini. Penelitian dual fuel yangmenggunakan etanol sebagai bahan bakar alternatifnya banyak dilakukan akan tetapi terjadi penurunan daya padamesinnya, maka pada penelitian ini diharapkan akan mendapatkan hasil nilai daya yang lebih bagus atau optimaldalam pembakaran. Dari penelitian yang telah dilakukan dengan penambahan rasio kompresi dan masuknya uapetanol yang sudah di atur dengan bukaan valve, maka didapatkan daya maksimum rasio kompresi standartdidapatkan 9,3 HP pada RPM 8000 bukaan katup 90° dan didapatkan torsi maksimum 9,7 N.m pada bukaan katup90° di RPM 6000, sedangkan pada CR 10,5:1 didapatkan daya maksimum 9,5 HP pada bukaan katup 90° di RPM 8000dengan torsi maksimum sebesar 9,41 N.m pada RPM 5500 bukaan katup 0°, pada variasi rasio kompresi terbesaryaitu 11,5:1 didapatkan daya maksimum sebesar 9,7 HP di RPM 8500 dengan bukaan katup 90° dan didapatkan torsimaksimum 9,79 N.m dengan bukaan katup 60° pada RPM 6000, jadi dapat disimpulkan variasi terbaik rasio kompresipada pengujian ini terdapat pada CR 11,5:1 dan bukaan katup 60° karena didapatkan daya maksimum terbesar.
ANALISA VARIASI SUDUT DAN DIAMETER STAGGER PENGHALANG PADA SISI RETURNING BLADE TERHADAP KINERJA TURBIN AIR SAVONIUS DENGAN PERSAMAAN MYRING n=1 DAN n=2 Widya Febrian Prasetia; Priyo Agus Setiawan; Pranowo Sidi
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

Turbin air savonius adalah jenis turbin sumbu vertikal yang mempunyai torsi awal yang tinggi dan dapat berputar pada kecepatan aliran fluida yang rendah, sehingga dapat diterapkan pada perairan di Indonesia. Turbin tersebut dapat digunakan pada aliran air untuk mengubah energi kinetik menjadi energi mekanik. Potensi tersebut akan dapat meningkatkan performa turbin. Penelitian ini akan menggunakan metode simulasi CFD (ComputationalFluid Diagram) dengan software Ansys Fluent dan mengkombinasikan dua sudu berbeda yang merupakan hasil variasi nilai (n) pada persamaan Myring n=1 dan n=2. Turbin yang akan disimulasikan memiliki ukuran tinggi 40 cm dan diameter 40 cm. Selain kecepatan arus yang digunakan sebesar 0,22 m/s. Di depan sisi returning blade, silinder sirkular dipasang sebagai pengganggu dengan variasi diameter 8 cm, 12cm, dan 16 cm yang berfungsi untuk meningkatkan performa turbin. Stagger divariasikan pada sudut 0º, 30?, 60º. Hasil yang diperoleh pada simulasi ini menunjukkan bahwa diameter stagger 16 cm dengan sudut 60? memiliki peningkatan performa tertinggi, yakni sebesar 19,9007%. Sedangkan variasi diameter stagger 16 cm dengan sudut 0? menurun sebesar 30,1087% dari turbin air savonius tanpa stagger.
ANALISA MODEL GETARAN MAIN ENGINE PADA PONDASI MAIN ENGINE KAPAL TANKER 6500 LTDW Roslyna Lovelylo; Adi Wirawan Husodo; Eky Novianarenti
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

This article mainly describes vibration on new ship’s main engine foundation. The highamplitude of vibration could damage ship’s hull structure and disturb ship’s passenger. The amplitudecan be reduced by adding damping in the main engine foundation. Thereby in this article, modellingthe matemathic equation to get the vibration response. In matemathic equation a software calledMATLAB is used to determine the best graphic response. The stiffness equivalen in the main enginefoundatioon is 1,29 × 106????/????????.In this article use two damping variastion. The first point graphicshow the displacement of main engine foundation in the amount of 0.3 mm on time 0 sec, The secondpoint o graphic show the displacement of main engine foundation in the amount of 0.278 mm on time 0sec, The third point graphic show the displacement of main engine foundation in the amount of 0.299mm on time 0 sec.
Studi Numerik Pengaruh Jarak Silinder Pengganggu Pada Sisi Returning Blade Terhadap Coefficient of Power (Cp) Turbin Angin Savonius Overlap Fariz Andika Firmansyah; Priyo Agus Setiawan; Projek Priyonggo Sumangun
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.v6i1.2426

Abstract

The coefficient of power Savonius wind turbine improved in experimental studies that added overlap and variation in the distance of the disruptive cylinder in front of the returning blade. However, further research needs to be done to validate the experimental results. This research is in the form of a numerical study using the 3-dimensional Computational Fluid Dynamics (CFD) method. In this simulation, the solver chosen is pressure based with a transient time mode. In addition, the model used is the k-epsilon realizable model. Simulations were carried out to determine the value of the coefficient of power the turbine. The turbine has the same diameter and height of 0.4 meters with the addition of overlap. The variation in the distance of the disruptive cylinder used is S/d = 1.4; S/d = 1.7; S/d = 2 and S/d = 2.3. The final result shows that the performance of the turbine can reach the highest increase of 3.51% compared with overlapped Savonius wind turbine without cylinder at a distance of S/d = 1.7. The coefficient of power (Cp) value is 0.324 at Tip Speed Ratio 1.
Analisis Pengaruh Kavitasi pada Pompa Sentrifugal Graving Dock Al Farrel Ghazali; 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.v6i1.2428

Abstract

Centrifugal pump at the graving dock experienced cavitation. It caused noise and a damage to its impeller as vapor bubbles appeared around it. This problem caused the centrifugal pump’s power decreased. The research method to solve it is collecting, calculating, and analyzing data. The calculations analyzed are the calculation of velocity, friction factor, head losses, pump head, NPSHA and NPSHR values. If NPSHA value is less than NPSHR, the pump is cavitated and modification to the piping system is needed so that the cavitation problem can be overcomed. The NPSHA calculation result is 4.77 m while the NPSHR is 6 m so that the it can be concluded that the pump experienced cavitation. Based on these calculations, modification of its centrifugal pump piping system is required. The pump which was originally had a suction pipe length of 6 meters was shortened to 5 meters. The pump position was lowered so that the suction pipe could reach the lowest water level at the graving dock. The pipe diameter of 0.3 meters was enlarged to 0.4 meters. After modification, the NPSHA value exceeds the NPSHR by 0.7 meters so that the centrifugal pump will be safe from cavitation.
RANCANG ULANG SISTEM PENDINGIN PADA MESIN FREEZER MULTIFUNGSI Mukhammad Zidan N; George Endri Kusuma; Projek Priyonggo Sumangun L
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.v6i1.2429

Abstract

Previous research was the beginning of the manufacture a multifunctional freezer, a machine that has two functions for cooling and drying and is aimed at preserving fish both dried and cooled. The evaporator on the machine is used for cooling the fish in the refrigerator. The cooling process has a weakness in the cooling system where the temperature in the chamber can’t reach a temperature below 0°C when the load is given above 0,5kg, and its cooling rate is less efficient so that the process of temperature reduction in a chamber given the load variation has a long enough time, so it can be concluded that the performance of the chiller is less optimal. In this final project, a cooling system redesign is carried out on a multifunctional freezer machine, as well as a capillary tube with a diameter of 0,31 inches and a length of 1,5 meters. Test results were obtained with weight variations of 0,5kg, 2kg, and 3kg. Average cooling speed of 0,255 kJ/s, chill room temperature of 2,7°C to -6°C, and the best coefficient of performance are obtained from the test results at a weight of 3kg with a COP value of 6,609 at 30 minutes and 5,133 at a test time of 60 minutes or 1 hour of operation of the multifunction freezer.
Analisis Risk Based Maintenance Sistem Bahan Bakar Main Engine Kapal Kontainer dengan Metode Reliability Centered Maintenance II Berdasarkan Klasifikasi Konsekuensi Standar Norsok Z-008:2017 Rifyan Haydare Zaman; Edi Haryono; Nurvita Arumsari
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.v6i1.2430

Abstract

Sistem bahan bakar kapal merupakan salah satu aset penting yang perlu dilakukan penetapan program pemeliharaan guna menunjang kelayakan kapal dalam beroperasi. Pada penelitian ini dilakukan penetapan program pemeliharaan dengan menggunakan Reliability Centered Maintenance II berdasarkan klasifikasi konsekuensi standar Norsok Z-008:2017. Dengan menggunakan metode klasifikasi konsekuensi berdasarkan standar Norsok Z008:2017, didapatkan hasill bahwasannya terdapat beberapa komponen yang memiliki tingkat menengah dan tinggi, sehingga perlu dilakukan proses lanjutan seperti evaluasi suku cadang maupun penyusunan rekomendasi pemeliharaan dengan bantuan RCM II decision worksheet. RCM II diperlukan untuk menyusun strategi pemeliharaan secara preventive maintenance, diantaranya on condition task untuk komponen seperti fo storage tank, scheduled discard task untuk komponen seperti fo transfer pump, scheduled restoration task untuk komponen fo filter. Selanjutnya dilakukan perhitungan biaya untuk mengetahui berapa biaya perawatan yang dibutuhkan tiap komponennya dan dapat ditarik keputusan akhir terkait jenis perawatan yang sebaiknya digunakan.
EVALUASI PENJADWALAN MAINTENANCE A/E (AUXILIARY ENGINE) TYPE YANMAR 6KHL-STN, MV.MERATUS SABANG DENGAN MENGGUNAKAN METODE RELIABILITY CENTERED MAINTENANCE Zendy Reda Rhomadan; Muhammad Shah; Nurvita Arumsari
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.v6i1.2431

Abstract

Identification of the level of criticality of a component based on the Reliability Centered Maintenance II method obtained components that have a critical level quantitatively owned by components in the F.O fuel system transfer pipe from injector pump to injector with a value of R(t) = 76 if qualitatively assisted with FMEA results the highest is owned by the fuel system component with RPN value = 150. and cost comparison analysis after implementing maintenance using Reliability Centered Maintenance II. Later, it is hoped that the results of this proper maintenance program can be applied to the Auxiliary Engine MV. Meratus Sabang in order to minimize operational costs that will be used in the future.

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