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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science
Dhimas Widhi Handani
Department Of Marine Engineering, Faculty Of Marine Technology, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS Sukolilo, Surabaya 60111, Indonesia
Computer Science & IT Earth & Planetary Sciences

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Performance and Noise Prediction of Marine Propeller Using Numerical Simulation Agung Purwana; I Made Ariana; Dhimas Widhi Handani; Wisnu Wardhana
IPTEK Journal of Proceedings Series No 1 (2018): 3rd International Seminar on Science and Technology (ISST) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (680.538 KB) | DOI: 10.12962/j23546026.y2018i1.3501

Abstract

One of the phenomenon appears on operation of marine propeller is noise. It could reduce performance of the propeller. In this study, numerical simulation is used to predict hydrodynamic performance and noise around non cavitation propellers. The formulation of RANS (Reynold Averaged Naiver Stokes) with turbulence model k-ω SST (Shear Stress Transport) and FWH (Ffowcs Williams–Hawkings formulation) is applied on the simulation. The noise is expressed in time-domain acoustic analogy as well as finite volume, and it is predicted at different receiver positions. The performance of propeller is predicted by MRF technique (Multiple Reference Frame). The 3D model of B-series propeller with diameter of D = 250 mm, blade number Z = 4, pitch diameter ratio P/D = 1, and area ratio Ae/Ao = 0.55 is simulated on various advance coefficients (J). Propeller rotation is simulated in range of 7.5 rps - 29rps and Re = 6.95x104– 3.36x106
Kajian Pengelolaan Boil Off Gas (BOG) dan Pemilihan Mesin Penggerak untuk Kapal LNG Carrier Dhimas Widhi Handani; I Made Ariana; I Putu Shindu A; Ayudhia Pangestu Gusti
IPTEK Journal of Proceedings Series No 2 (2018): The 2nd Conference on Innovation and Industrial Applications (CINIA 2016)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (936.614 KB) | DOI: 10.12962/j23546026.y2018i1.3354

Abstract

Dalam pengoperasian kapal LNG, Boil off gas (BOG) yang dihasilkan dapat ditreatment untuk dirubah kembali menjadi LNG atau dapat dimanfaatkan untuk keperluan bahan bakar pada sistem penggerak utama. Penanganan BOG menjadi sangat penting dikarenakan dapat meningkatkan efisiensi operasional kapal, namun sebaliknya dapat menimbulkan kerugian secara ekonomi jika tidak dilakukan dengan tepat. Paper ini mengkaji penggunaan BOG yang dihasilkan oleh kapal LNG sebagai bahan bakar pada berbagai operasional mode (Full speed, Economical speed, NBO speed, Pilotage, Drifting, Anchorage). Mesin utama kapal yang digunakan pada kajian ini adalah dual fuel diesel engine (DFDE). Tujuan dilakukannya kajian ini untuk mendapatkan operasi kapal yang optimum saat proses penguapan Natural Boiled Off Gas (NBO) serta membandingkan tiga jenis dual fuel engine pada pengoperasian kapal LNG, yaitu DFDE, ME-GI engine dan X-DF engine. Metode yang digunakan pada kajian ini adalah perhitungan daya mesin kapal, perhitungan propeler, engine propeller matching, dan perhitungan konsumsi bahan bakar. Dari hasil kajian didapatkan bahwa kapal LNG yang saat ini dioperasikan mengkonsumsi bahan bakar lebih banyak dari pada operasi idealnya. Sedangkan dari perbandingan mesin dual fuel, ME-GI memperlihatkan konsumsi bahan bakar yang lebih efisien
Subsea Gas Pipeline Risk Assessment During Hot Tapping Installation Ketut Buda Artana; I Made Ariana; A.A.B. Dinariyana; Dhimas Widhi Handani; Emmy Pratiwi
IPTEK The Journal for Technology and Science Vol 27, No 2 (2016)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (562.512 KB) | DOI: 10.12962/j20882033.v27i2.1294

Abstract

This paper examines the risk to subsea gas pipeline during hot-tapping installation process. Hot tapping is one method to connect new pipeline to existing pipeline while they remain in service. In this study it is considered that hot tapping is installed using crane barge. To assure the crane barge in steady position, the crane barge is moored by means of mooring chain at several locations. These mooring activities and hot tapping installation possess potential risk to existing subsea facilities. Hence, in general there are two objectives in this study such as: determining the safe distance between mooring chain for and the existing facilities, and performing risk level due to external load that may occurs during installation. The risk level is determined by analyzing frequency and its consequence then will be mapped into risk matrix according to DNV-RP-F107. From mooring distance analysis, the result can be used as a reference for positioning the mooring point of crane barge. Based on the result of risk assessment to facilities, risks due to external load such as dropped anchor, dragged anchor, ship sinking and dropped object are in the as low as reasonably practicable (ALARP) region which mean, in the practical life risks are acceptable as long as the frequency is maintained in the lowest rank. 
Prioritization of Research Vessel Lubricating Oil System Equipment for Maintenance Purpose Using Failure Mode Effect and Criticality Analysis (FMECA) Method. Study Case: RV. Baruna Jaya Tris Handoyo; Dhimas Widhi Handani; Agus Sudaryanto; Dimas Fajar Prasetyo
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 20, No 2 (2023): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v20i2.52700

Abstract

Alongside the program, which requires research vessel operation, RV Baruna Jaya is needed to fill that requirement fully. RV Baruna Jaya reported many failures during the previous mission. Some failures need emergency maintenance. One of them is the problem with the lubricating oil system. The lubrication system of an engine supplies of lubricating oil to the various moving parts of the engine. Its main function is to form an oil film between moving parts, which reduces friction and wear. The lubricating oil is also used as a cleaner and, in some engines, as a coolant. During the survey Ina-TEWS in 2021, RV Baruna Jaya was ordered due high temperature of The Lubricating Oil System. The temperature exceeded the normal value, and due to safety considerations, the ME needed to be shut down. Because of this problem, the survey carried out by RV Baruna Jaya was delayed. So, it is important to maintain a lubricating oil system. In this analysis, to maintain the function and performance of the lubricating oil system, the FMECA is carried out. By prioritizing the lubricating oil system equipment using FMEA and Criticality Analysis, 6 pieces of equipment with 24 failure modes should be maintained. These equipment are lubricating oil cooler, lubricating oil pump, engine service oil tank, engine reserve oil tank, Engine lubricating oil standby pump, and lubricating oil transfer pump. The maintenance task is proposed to minimize the occurrence of failure mode, which could possibly happen in the equipment.
Co-Authors A.A.B. Dinariyana Agung Purwana Agus Sudaryanto Ayudhia Pangestu Gusti Dimas Fajar Prasetyo I Made Ariana I Made Ariana I Putu Shindu A Ketut Buda Artana Pratiwi, Emmy Tris Handoyo Wisnu Wardhana