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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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ANALISA RESPON GETARAN TERHADAP PEMODELAN MISALIGNMENT SHAFT PROPELLER KAPAL WHITE PRODUCT TANKER Bagas Haris Firmansyah; Adi Wirawan Husodo; Abdul Gafur
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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Penelitian ini mengkaji respon getaran torsional sistem transmisi dari kapal white product tanker.Tugas akhir ini akan dijadikan acuan atau pedoman kepada galangan untuk mengetahui getaran akibat dari efekmisalignment. Pemodelan menggunakan standar 2 derajat kebebasan yang digambarkan dengan 2 persamaandifferensial. Terdapat 2 pusat massa yang berada di stern tube dan propeller. Tugas akhir ini akan dilakukanproses pemodelan getaran poros propeller akibat misalignment menggunakan software MATLAB 2013a. Variasimisalignment yang digunakan untuk proses pemodelan getaran sebesar 0,025 mm, 0,05 mm, 0,075mm, dan 0,1mm. Variasi tersebut merujuk pada standard maksimum mislaignment yang dikeluarkan oleh class untukmengetahui respon getaran, frekuensi natural, dan resonansi dari setiap variasi misalignment. Hasil daripemodelan menunjukan nilai dari respon getaran pada saat kondisi centre sebesar ?1 range amplitudo -1,4107997x10-7rad/s sampai dengan 1,5086487x10-7 rad/s dan ?2 range amplitudo -9,477330x10-7 rad/s sampaidengan 8,8626428x10-6 dengan periode 0,05 sec dan waktu 1800 sec. Pada ukuran misalignment 0,1 mm dengannilai respon getaran ?1 min -1,41079x10-7 rad/s maksimum 1,50873x10-7rad/s dan ?2 range amplitudo -9,4772x10-7 rad/s sampai dengan 8,86278x10-7 rad/s. dengan periode 0,05 sec dan waktu 1800 sec. Respongetaran yang terjadi pada varias misalignment masih diijinkan standard ISO Severity 10618-3 dan class ABS.Semakin besar ukuran dari misalignment akan menyebabkan semakin besarnya getaran yang terjadi.
ANALISA UNJUK KERJA TWO STROKE MARINE DIESEL ENGINE BERBAHAN BAKAR CAMPURAN MINYAK SOLAR DAN BIODIESEL MINYAK KELAPA PADA BEBAN SIMULATOR FULL LOAD M Haris Sochibul Kirom; Muhammad Shah; Edi Haryono
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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As the era develops, the need for petroleum is getting bigger as a fuel so thatinnovation is needed to create renewable energy that can be continuously renewed and utilized,one of which is by creating biodiesel. Biodiesel is a fuel produced from animal fats and vegetableoils through a transesterification process. One of the crops that has the potential to becomebiodiesel is coconut, because Indonesia has the largest coconut plantation in the world. Inaddition, coconut oil also has a very high ester content when compared to other vegetable oils.This study aims to analyze the performance of marine diesel engines under full load conditionsusing mixed fuels, namely diesel and coconut oil biodiesel for power, torque, and gsfc. In thisstudy, the most optimal variation of the fuel mixture on the performance of marine dieselengines. From the test results, it can be concluded that the mixture of coconut oil biodiesel withdiesel fuel increases the power produced with a torque of 239.6343 Nm. The use of the fuelmixture increases the performance of the diesel engine so that the power and torque produced ishigher than using Pertamina Dex alone. From the results of research, the B30 fuel has the highestpower and torque and the B30 fuel also has the lowest gsfc value.
Analisa Terhadap Stabilitas dan Olah Gerak pada Kapal Ferry Ro-Ro Akibat Penambahan Panjang Yanuar Eka Erida; Raden Dimas Endro Witjonarko; 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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In this study the authors will analyze the stability and also analyze the sea condition index of the shipafter undergoing modification in addition of length. The analysis continued on checking the stability conditions ofthe ship after undergoing modification of the addition of length by simulating the model and loading on theMaxsurf software, a simulation of loading given when conditions ship departure and arrival and also examine thecondition of the waters in which the ship can sail safely according to seakeeping criteria based on Nordforsk 1987rule. The ship after modification in all loading conditions meets the stability criteria IMO intact stability and hasbetter stability performance than the ship before modification.The ship after modification is not suitable to be onthe Lombok Strait shipping route in full load state because in the calculation the ship has a deck wetnessprobability that exceeds 5% according to Nordfordsk 1987 regulations.
KAJIAN NUMERIK PENGARUH VARIASI SUDUT STAGGER DAN DIAMETER SILINDER SIRKULAR DI SISI ADVANCING BLADE TERHADAP KINERJA TURBIN AIR SAVONIUS BERSUDU KOMBINASI MYRING N=1 DAN N=2 Firdaus Styo Fathoni; Priyo Agus Setiawan; Daisy Dwijati K.R.A
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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Indonesia has a great potential to use water currents as an energy source that can be convertedinto electricity. Savonius water turbines can be used as its solution to make it. Its performance can be improvedby modifying its combined blades with myring n=1 and n=2 and also by adding a circular cylinder on it. TheComputational Fluid Dynamics (CFD) method with Ansys 17.2-Fluent and Tecplot software are chosen and usedfor its flow characteristics study produced by the turbine. Gambit software is also used to create geometry anddomain models. The boundary condition of the model include the inlet as the input properties area with an initialvelocity of 0.22 m/s as analysis limitation of control surface on the test model. The modification include the useof combined blade with myring n=1 and n=2. One circular cylinder is added in front of the advancing blade sothat the flow velocity will be higher and its efficiency can be increased. Circular cylindrical diameters are variousi.e. ds/D=0.2; 0.3 and 0.4 with 0?, 30? and 60? stagger elevation angles. The results obtained from this researchare the values of torque coefficient (Cm), power coefficient (Cp), pressure distribution and fluid flowcharacteristics. Turbine performance has the highest increase (35.86%) on ds/D =0.4 with 60? stagger elevationangle variation. The greatest decrease (30.11%) occured on ds/D=0.4 0? stagger elevation angle variation withoutusing circular cylinder.
RANCANG BANGUN SISTEM OTOMATISASI PADA CUSTOM ICE CRYSTAL MACHINE Mokhamad Rizki Febriansyah; Muh Anis Mustaghfirin; Aminatus Sa’diyah
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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Ice crystal is a daily needs for consumables, so that it needs an inovation that serves as asupport to sover the needs of ice crystal. For the performance of tools needed automation made tofacilitate the performance of this ice crystal machine, with the main drive of the DC motor made forthe ups and downs of the plate as a mold for this ice crystal, then in the automation writer usesArduino as a micro-controller that will capture the DS18B20 sensor. with a DS18B20 sensor that cancapture sensors below -55 ? so that when the ice crystal is frozen the sensor will read and move theDC stepper motor that makes the automatic plate down and the ice crystal attached to the evaporatorwill be released with a reverse process on the system. Ice crystal will fall automatically and prepare atray as a base to hold the ice.
Kajian Ekperimen Pengaruh Pemasangan Silinder Sirkular Bervariasi Diameter dengan Posisi X/D = 0.5 dan Y/D = 0.7 pada Sisi Advancing Blade Terhadap Performa Turbin Air Savonius Difa Falahudin; Priyo Agus Setiawan; Arie Indartono
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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Savonius water turbine has the opportunity to be developed. An innovation is needed toimprove the performance of savonius water turbines. An experimental study on the effect of installing acircular cylinder with varying diameters on the advancing blade side of the savonius water turbineperformance needs to be carried out. The experiment used savonius water turbine myring n = 1 andmyring n = 2 with a diameter and rotor height of 40 cm each. Circular cylinder diameter variations usedare ds/D=0.2, ds/D=0.3, and ds/D=0.4. Circular cylinder is positioned at a distance of X/D=0.5 andY/D=0.7. The result is the coefficient of torque (Ct) and the coefficient of power (Cp). In addition, thediameter of the circular cylinder that is capable of producing the best performance of Savonius waterturbines will be obtained. The results of the experiment indicate that the installation of a circular cylinderon the advancing blade can improve the performance of savonius water turbines. Variation in circularcylinder diameter ds/D=0.4 results the highest Ct and Cp values in the savonius water turbine myringn=1 and myring n=2. Myring n=1 turbine experiment shows the value of Ct obtained is 0.34 at the tipspeed ratio (TSR) of 0.73, while in myring n=2 turbine, the value of Ct obtained is 0.34 at TSR 0.49.Myring n=1 turbine experiment shows a Cp value of 0.25 at TSR 0.73 (showing an increase of 66.67%),whereas in myring n=2 turbine, the Cp value obtained is 0.16 at TSR 0.49 (showing an increase of21.43%).
Rancang Bangun Mesin Ekstrusi Plastik Khusus Bahan Styrofoam Bagus Putera Beni Abdullah; Muhammad Shah; Nopem Ariwiyono
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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Styrofoam banyak digunakan dalam kehidupan sehari-hari antara lain digunakan untuk dekorasi, maket bangunandan wadah penyajian bagi hidangan produk siap saji. Namun, pemanfaatan styrofoam yang luas menjadipermasalahan bagi lingkungan berupa pencemaran. Styrofoam yang dimanfaatkan dalam kegiatan pengemasan,alat rumah tangga, mainan, dan bahan pelengkap menyebabkan menumpuknya sisa hasil pemakaian berupalimbah. Limbah styrofoam sulit terurai dan sering kali menggunung di sungai. Bahkan limbah styrofoammenghasilkan 57 zat berbahaya ke udara. Pengolahan styrofoam yang menggunakan metode sabuk pemanasmemiliki hasil keluaran yang belum sempurna. Hal ini dikarenakan suhu pemanasan yang dicapai oleh sabukpemanas tidak sesuai dengan yang diharapkan, juga karena kurangnya gaya penekanan didalam tabung pemanassehingga hanya beberapa bagian yang mencair. Namun, dengan metode ekstrusi ini, panas yang dihasilkan tidakmeradiasi keluar. Dalam penelitian tugas akhir ini telah dirancang dan dibuat mesin pengolahan limbah plastikstyrofoam berupa mesin exstruder dengan ukuran diameter dalam pada barrel 200 mm dan diameter screw 120mm. Dengan pemanas Electrik heater dengan jenis Band heater 7500 watt sedangkan transmisi extruder 1:5dengan motot listrik yang memiliki daya 25 hp pada 1450 rpm.
ANALISA PERENCANAAN KONSTRUKSI STRUT PROPELLER DENGAN PROFIL NACA Riska Amaliyah; Raden Dimas Endro Witjonarko; Nurvita Arumsari
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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important constructions is the construction of propeller strut. The propeller strut is a support consistingof an arm and a bearing that is attached between the propeller shaft and the hull on the stern of the ship. In thisstudy, a modification was made to the propeller strut construction with the cross-sectional shape of the terrain insuch a way that it gave the shape of the cross-sectional profile of the National Advisory Committee of Aeronautics(NACA) and formed a solid cylinder. This alternative strut design is modeled and simulated using the CFD tool inthe ANSYS CFX software so that the average velocity, streamline flow, and pressure on the strut are known. Andexpressions with optimization with the particle swarm optimization method. The results of this study found that theNACA profile 16-021 is the best and efficient profile among 2 other profiles.
PENGARUH EVAPORATOR PADA EXHAUST SEPEDA MOTOR KARBURATOR TERHADAP SI ENGINE BAHAN BAKAR DUAL FUEL BENSIN-UAP BIOETANOL Fahril Muhamad; George Endri Kusuma; Mohamad Hakam
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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Penambahan bahan bakar berbasis nabati khususnya bioetanol dari penelitian sebelumnya memberikanefek proses pembakaran makin sempurna, sehingga mesin akan menjadi lebih bersih dan emisi gas buang menurunmenjadi ramah lingkungan. Penggunaan bioetanol yang mempunyai oktan tinggi dapat menjadikan akselerasi mesinlebih ringan dan cepat. Dilakukan eksperimen menguapkan bioetanol dengan mendesain evaporator pada exhaustsepeda motor Supra X 125 cc karburator tahun 2008 untuk menciptakan alternatif bahan bakar terbarukan denganmemanfaatkan energi panas dari exhaust (regenerasi energi). Dilakukan dynotest performa SI Engine sebelummodifikasi dan sesudah modifikasi dengan variasi bukaan katup uap bioetanol 30°, 60°, 90°(fully open throttle)dengan variasi RPM yang dinaikkan dengan interval 1000 dimulai dari RPM 5000 hingga RPM 9000. Pengujian SIEngine dengan evaporator pada exhaust sepeda motor dual fuel bensin-uap dapat diterapkan dan layak jalan untukdioperasikan. Hasil eksperimen menggunakan evaporator ini diambil data optimum pada variasi bioetanol bukaankatup 60°, dengan peningkatan daya dan torsi sebesar 9 HP menjadi 9,4 HP, untuk torsi dari 7,98 Nm menjadi 8,3Nm pada RPM 8000. Angka efisiensi termal kendaraan mengalami penurunan sebesar 25,6%, dari 90,3% menjadi65,3% . Untuk data emisi gas buang mengalami penurunan CO sebesar 10%, HC dengan nilai 51%, kemudianmengalami peningkatan CO2sebesar 46,3%
Analisis Kekuatan Struktur Pondasi Mesin Induk di Bangunan Baru Kapal Tanker 6500 LTDW dengan Menggunakan Software Ansy Wido Juni Wijanarko; 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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The strength construction to know the reaction that received in the construction to keep froma load, this aims to determine the safety and security of a construction. This research willfind equivalent stress value from a main engine foundation because loading from mainengine weight and main engine operation to customized with Class standard and to findsafety factor value. The load modelling will use Ansys Workbench 17.2, the method will useto analisys is a Finite Element metode to find stress value. This method will be used whendoing meshing in the Ansys Software. Meshing used size meshing 700 mm and fine for typemesh. The result have got the maximum stress value occurs at main engine Trial Conditionswith power at 100% got 237,8 MPa. Of All conditions analysis that have done have safetyfactor exceed than 1, maximum safety factor got 1,144 when main engine trial condition, sothis constructions confirmed safety construction. Then, maximum equivalent stress notpermitted exceed 264,37 MPa because it regulated from Class. Critical Area will receive inthe frame number 22.

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