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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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Desain LNG Storage Tank dan Sistim Refrigerasinya untuk Mobil Berbahan Bakar Gas Rudianto Rudianto; Anis Mustaghfirin Muh.; Mahardhika Pekik
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.813

Abstract

LNG or liquified natural gas is gas that used as fuel in industrial sector. LNG gas has critical point -1180C. But when it’s used on cramped vehicle, it’s needed special cryogenic tank to keep LNG temperature. Therefore,it needs to be designed LNG storage tank in gas- fuelled car with PV elite software. Previous research has already been conducted on the LNG- fuelled truck. This study purpose to created a tank design support equipment and cascade refrigeration system with LMTD method. This tank was made to save and survive the existance of LNG fuel. The design calculation result of refrigeration system has obtained 4 stage cascade system.Refrigerant used is 134a, Ethane, methane, and Ethylane. Cooling load is very small 28,77 Watts, so can be used small compressor 1/10 PK.The heat exchanger design are obtained at stage bottom-up use ¼ in copper pipe wuth a leght 8,5 cm, 8,51 cm, 11,53 cm, and 18,58 cm. And capillary pipe design is obtained frome bottom-up stage with diameter 0, 26 in, 0,31 in, 0,33 in, 0,31 in, and 0,59 in with lenght 3,8 m, 1,2 m, 1,4 m, 1,9 m, and 4,6 m.
ANALISA TEGANGAN CHAIN LINE SINGLE POINT MOORING TYPE CATENARY ANCHOR LEG MOORING PADA AFRAMAX TANKER Nurhuda Yusuf; Wirawan Husodo Adi; Sumardiono Sumardiono
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.814

Abstract

One of the constraints that occur in the mooring system of SPM is the breaking of chain line caused by its inability to accept work load.In this problem, it is necessary to analize the tension line of SPM catenary anchor leg mooring (CALM) type on aframax tanker. The purpose of this research is to know the movement response of structure and the maximum tension chain line. The largest response amplitude operator (RAO) obtained when SPM moored on Aframax Tanker in the conditions of translational movement heave by 0.986 (m/m) on heading of 0° and 135 º. The largest response of the structure obtained when SPM moored on Aframax Tanker in the conditions of translational movement heave by 17.44 m²/(rad/s) on heading of 180 º. The greatest tension chain line is 2424873 N with the results of chain line tension still meets the safety factor in accordance with the standard API RP 2SK 2nd edition. The analysis results of chain line power structure is 155.42 MPa, if the dimension of chain line is reduced by 0,2 mm/year in a space of 13 year time then the stress obtained is 169,67 Mpa, and with estimation of 30 year time the value of stress obtained is 238,82 Mpa.
KAJIAN NUMERIK BACK FLOW CAMPURAN BATUBARA–AIR PERPIPAAN BA-300 PADA PYRITES HOPPER SYSTEM DI PLTU UNIT 8 PT. POMI PAITON Khairuddin Khairuddin; Priyonggo SL Projek; Moballa Burniadi
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.815

Abstract

Pulverizer is one of the most important equipment in PLITU PAITON Unit 8, the pulverizer has supporting equipment, one of which is the pyrites hopper system. The functions pyrites hopper is to accommodate coal reject from pulverizer which will be directed towards SSCC using a jet pump. The occurrence of backflow causes damage to the pulverizer on the floor plate. Thermal stress occurs because the backflow of the BA-300 piping flow that enters the pulverizer floor plate temperature drops. This research discusses the backflow causes that occur in the BA-300 pipeline and alternative solutions. This research phase starts from the identification of backflow problems, data collection and literature study regarding backflow on the swing check valve, as well as CFD (Comptational Fluid Dynamics), modeling of existing BA-300 piping system, search and evaluation of alternative solutions. From the simulation results, the coal particles are sandwiched between the disc and casing check valve because the coal particles settle at the bottom of the check valve, which is caused by the amount of flow rate of coal 2.6 kg / s. Of the 6 variations made, the reduction in flow rate with the amount of 1.7 kg / s was not found again pinched coal even though there was still a bit of coal sequestration.Keyword : Backflow, CFD, Swing check valve model.
Pengaruh Penambahan Blade pada Intake Valve untuk Optimasi Swirl pada Diesel dengan Simulasi CFD Luqman Arif Nurudin; Sudiyono Sudiyono; Agus Setiawan Priyo
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.817

Abstract

Because of the importance of limiting exhaust emissions in the future and looking for moreenvironmentally friendly fuels, the design of combustion engine is continuously improve the combustion processwhich aims to reduce fuel consumption and engine exhaust emissions. Swirl is a turbulent air flow patternduring the suction process which affects the process of mixing and combustion process. This research usesComputional Fluid Dynamic method. There are 9 models of variations in this study, by adding a blade to theintake valve head with a slope angle of 90°, 60°, 30° and the number of blade 2, 3, 4 with a configuration of180°, 120°,90°. The variation of model is used to examine changes in fluid characteristics (velocity,temperature, and pressure) flowing through the variation model and the effect of changes in the swirl ratiovalue on each intake valve model that affects the combustion process. From the results of the study, the modelof the addition of the blade obtained includes models 90M2, 90M3, 90M4, 60M2, 60M3, 60M4, 30M2, 30M3and 30M4. The decrease in velocity was found in the 30M4 model which has 10.668 m/s, 6.723 m/s, and 5.91m/s. The air temperature in the largest increase on 30M4 model, was 300.004 K, 300.055 K, and 300.053 K.The highest air pressure increase was on the 30M4 model which was 99,100 Pa, 99,138 Pa, and 99,144 Pa.The lowest swirl ratio decrease is found on the 60M4 model, which is 0.1 and the highest swirl ratio is obtainedfrom the variation model which is 0.29 which is found in the 90M3 and 30M4 models.
Analisa Kerusakan Bantalan SKF 6305 Pada Carrier Idler Di PT.SEMEN INDONESIA (PERSERO) Doni Fauzi Muhamad; So’im Subagio; Sudiyono Sudiyono
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.818

Abstract

Conveyor belt at PT. SEMEN INDONESIA is a coal transporter from ship to land. On the conveyorsection there is a slacker that functions as a belt buffer. In idling, some can work to support the idler shaft so that theidler shaft can rotate without excessive pressure. The pads on the idler often fail, especially bearing on the bottom ofthe chute transfer. Besides that, coal transportation factor is also one of the factors causing the failure of bearings.Coal transported by belt conveyors at PT. SEMENT INDONESIA there are two types of bituminous and anthracitecoal. Types of bearing damage that occur in PT. SEMENT INDONESIA is crack, pear skin, discoloratioan, wear,smearing, and corrosion. From the data and calculation results obtained, it is necessary to periodically check thatthe treatment can be carried out properly so that the equipment has a long service life. To find out the causes of whyit can happen, more research is carried out on bearings to get accurate data about the failures that occur on thebearing.
Analisa Kebijakan Penjadwalan Perawatan pada Main Engine MV. Tanto Bersinar dengan Menggunakan Metode Reliability Centered Maintenance Dories Putra Pradana; Muhammad Shah; 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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Abstract

Mesin utama memiliki peranan penting dalam menunjang kegiatan berlayar karena jika mengalami kegagalan maka kapal tidak bisa berjalan dan menimbulkan kerugian ekonomi. Saat ini PT. Tanto Intim Line melakukan perawatan di semua kapalnya berdasarkan corrective maintenance. Metode tersebut dinilai masih belum efektif untuk menangani kegagalan yang terjadi, karena sedikitnya sumber daya manusia yang tersedia sehingga belum teratasi dengan baik. Dengan demikian, diperlukan maintenance task yang tepat, sehingga perusahaan dapat memprediksi kerusakan yang terjadi dan menyediakan suku cadang baru sebelum kerusakan terjadi. Metode perawatan yang sesuai dalam menentukan apa yang harus dilakukan adalah dengan menggunakan RCM (Reliability Centered Maintenance), dengan metode ini dapat diketahui jenis perawatan dan interval perawatan yang sesuai untuk setiap komponen yang mengalami kegagalan. Berdasarkan analisa didapatkan frekuensi kegagalan pada komponen injector sebesar 6 kali/tahun, komponen piston dengan frekuensi kegagalan 4 kali/tahun. Dengan didapatkannya hasil frekuensi kerusakan maka dapat ditentukan strategi perawatan pencegahan (preventive maintenance) untuk komponen yang memiliki tingkat resiko paling tinggi dan menengah sehingga mempengaruhi biaya, produksi, dan kesehatan serta keselamatan kerja adalah piston, injector, cylinder head, cylinder liner, governor, fuel injection pump dan perawatan saat terjadi kerusakan (corrective maintenance) untuk komponen yang memiliki tingkat resiko paling rendah adalah connecting rod & crosshead, thrust bearing, crankshaft.
Analisa Pengaruh Sudut Stagger Di Depan Advancing Blade Terhadap Performa Turbin Air Savonius Myring Blade n=1 & n=2 Alfin Ardianto; Priyo Agus Setiawan; 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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Abstract

Savonius water turbines can work at low fluid flow rates and have high torque, but have disadvantageswhich is the lowest Cp value compared to other turbine types. Efficiency can be improved by changing the shapeof the Savonius Turbine blade using the myring equation and adding an obstacle. The experimental method in thisstudy combines two blades resulting from variations of the value (n) in the myring equation n = 1 and n = 2, withmyring n = 1 placed on the concave side and n = 2 on the convex side. To improve performance, a 12 cm diametercircular cylinder is placed in front of the advancing blade with varying stagger angles. The test model has a heightof 0.40 m and a diameter of 0.40 m which will be tested in a flowing tank with a width of 1 m and height of 1 m.Experiments were carried out at a current speed of 0.2 m / s by measuring the turbine rotation and load to producea torque coefficient and a power coefficient. The experimental results show that the placement of the circularcylinder with ds / D = 0.3, S / D = 0.75, and ? = 60º obtained the highest performance with an angular velocityof 0.5160 rad / s, Coefficient of torque (Ct) of 0.2936 and Coefficient of power (Cp) of 0.1515. With a percentageincrease compared to myring n = 1 and n = 2 without an obstacle of 10.27%, this proves that the addition of acircular cylinder can improve the performance of Savonius water turbines.
KAJIAN EKSPERIMEN PENGARUH PEMASANGAN SILINDER SIRKULAR DENGAN DIAMETER SILINDER 16 CM DAN JARAK 20 CM PADA SISI ADVANCING BLADE TURBIN AIR SAVONIUS Deni Purnanto; Subagio Soim; Priyo Agus Setiawan
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

Savonius turbine for the first time was founded by Sigurd Johannes Savonius in 1922. This turbine hasvertical axis and half-round shaped on each side of blades and like an “S”. This turbine aslo called as drag turbinebecause it need drag force on its blades to whirling the turbine. Many research were done to increasing theperfomance of this turbine and one of them was using deflector plate in front of the turbine. On this experiment,the method is using distance and diameter of circular cylinder variations. The turbine for this experiment usingmyring equation with n=1 for the blades shape. Dimension of the turbine is 400 mm in height and 400 mm indiameter. The diameter of circular cylinder (ds) is 16 cm and the distance (A) is 20 cm used in this experiment.The result obtained in this experiment showing that the highest value of Ct is 0,3038 at TSR 0,633 with increasedpercentage is 7,955%. The highest Cp value is 0,1924 at TSR 0,633 with increased percentage is 20,828%.
ANALISA PEMASANGAN SISTEM PENGGERAK PADA KAPAL CRANE BARGE DENGAN PROPULSI ELEKTRIK Farrel Chandra Mukti; Eko Julianto; 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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Abstract

A Crane barge ship is a ship designed specifically to have a crane on deck. The function of thisship is to unload coal/bulk cargo at the mid-sea, which is to go the middle of the sea this sip must be towedby Tugboat. This research will discuss the analysis of the propulsion system using electric propulsion withazimuth thruster propeller. In this study the calculation is the resistance of the ship, power requirement bythe ship, selecting of a propeller, electrical system. The calculation resistance of the ship using maxsurfresistance software, before simulation the model 3D of ship design in maxsurf modeler. Then if theresistance value is determined can be used to calculate the power of electric motor requirement as theprimer mover of the ship. Then the result of these calculations can be selected as the propeller. Based onthe calculation result, the value of the ship resistance is 1555,95 kW when the ship used 4 azimuth thruster,so the resistance value is 388,987 kN. The power of the electricity needs to supply power to motor electricas the primer mover is 4632 kW. The Selection of propeller used is a product from thrustmaster which hasa thrust is 529 kN with a diameter propeller is 2.99 meters.
PERENCANAAN PERAWATAN IMPELLER DAN SHAFT FRESH WATER PUMP DENGAN METODE PREDICTIVE MAINTENANCE Ahmad Muzzammil; Nurvita Arumsari; Benedicta Dian Alfanda
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

A maritime transportation based company used corrective maintenance on these two component,impeller and shaft of fresh water pump inside their ship’s water cooling system. While using correctivemaintenance, these two components are getting maintained when its already in worse condition and made thesystem down. Therefore, a reliability analysis is performed using predictive method to predict when will these twocomponent would break down and then scheduled to fix based on MTTF value of component. Then, the systemwould run without getting disrupted because of the unit’s downtime.

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