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All Journal Jurnal Teknik ITS International Journal of Marine Engineering Innovation and Research

Irfan Syarif Arief

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Author-ID : 433027

Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Analisa Kinerja Bandul Vertikal dengan Model Plat pada PLTGL Honey Rambu Anarki; Irfan Syarif Arief
Jurnal Teknik ITS Vol 4, No 2 (2015)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Sumber energi seperti energi fosil yang semakin menipis. Hal ini mendorong semua pihak untuk dapat menjadi lebih baik hingga ilmu yang terdapat didalam dunia perkapalan dapat melahirkan inovasi terbaru, salah satunya adalah pembangkit listrik tenaga gelombang laut – sistem bandulan. Ponton yang menggunakan sistem bandul adalah salah satu alat yang digunakan untuk mengkonversi dari energy laut menjadi energi listrik. Dalam kajian ini menggunakan kondisi uji onshore tanpa menggunakan ballast dan uji off-shore dengan ballas. Dari kajian ini didapatkan banyaknya putaran yang dapat dihasilkan bandul dengan variasi bentuk sudut juring, tebal plat juring dan sudut kemiringan ponton. Untuk uji on-shore daya terbesar didapatkan pada pengujian dengan menggunakan sudut juring 60 o, tebal 3 mm,sudut kemiringan 60 o daya yang dihasilkan 0.107 watt. Untuk pengujian offshore pada ballas 12 cm, 15 cm,17.5 cm, daya terbesar dihasilkan pada ballas dengan daya 0.124 watt pada juring, tebal, dan sudut kemiringan yang sama dengan pengujian onshore. Jumlah putaran dengan waktu, pada pengujian on-shore yang menghasilkan nilai paling besar pada juring dengan sudut 45 o, tebal 2 mm sudut kemiringan 45 o nilai yang didapatkan 1,176 rad/s. Pada pengjuain off-shore paling besar ada pada ballas 17.5 dengan 1.93 rad/s.

Analisa Gerakan Ponton Model Tripod untuk Energi Gelombang Sistem Bandulan Yasin Besari Mustofa; Irfan Syarif Arief; Amiadji Amiadji
Jurnal Teknik ITS Vol 1, No 1 (2012)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Abstrak—Pembangkit Listrik Tenaga Gelombang Laut – Sistem Bandulan (PLTGL-SB) adalah salah satu pembangkit listrik yang memanfaatkan gelombang laut sebagai sumber energinya. Ponton berfungsi untuk mengangkut bandul yang terhubung dengan dinamo. Setiap gerakan air laut akan menggoyangkan bandul untuk memutar dinamo sehingga menghasilkan energi listrik. Perbedaan model ponton berpengaruh terhadap gerakan yang akan dihasilkan. Penelitian sebelumnya telah dilakukan dan masih dikembangkan pada model ponton segidelapan. Apabila penelitian ini berhasil, maka diperlukan lebih dari satu ponton yang akan dioperasikan. Sehingga diperlukan penelitian lebih lanjut untuk mendapatkan efisiensi dari jumlah pemasangan ponton. Penelitian ini dilakukan pada ponton model tripod, yaitu tiga buah ponton segidelapan yang dihubungkan dengan membentuk pola segitiga sama sisi. Penelitian ini bertujuan untuk mengetahui gerakan terbaik pada ponton model tripod. Pada tinggi gelombang 0.5 – 1.5 meter, gerakan terbaik didapat pada tinggi gelombang 1.5 meter. Pada periode gelombang 4 – 12 detik, gerakan terbaik didapat pada periode gelombang 4 detik. Ponton model tripod sesuai untuk diaplikasikan pada Pembangkit Listrik Tenaga Gelombang Laut – Sistem Bandulan (PLTGL-SB) jika dibandingkan dengan ponton segidelapan.

Perancangan Mooring System Untuk Bangunan Pembangkit Energi Laut Bayu Ekosaputro; Irfan Syarif Arief; Toni Bambang
Jurnal Teknik ITS Vol 3, No 2 (2014)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Mooring system merupakan komponen penting dalam sistem pembangkit energi laut. Mooring system harus dirancang agar mampu menjaga bangunan pembangkit energi laut tidak berpindah posisi. Gaya yang bekerja pada pontoon sangat berpengaruh terhadap mooring system. Sehingga diperlukan perancangan mooring system yang mampu menjaga pontont terhadap gaya-gaya yang ada di lingkungan, dimana bangunan tersebut diletakkan. Terdapat beberapa gaya dari lingkungan yang terjadi pada pontoon, antara lain adalah gaya angin, gaya arus, gaya gelombang dan oblique environment. Berdasarkan data dan perhitungan, nilai gaya gaya angin sebesar 113,913 N, gaya arus dari depan 1,454 N, gaya arus dari samping 36,422 N, gaya arus pada submersible 147,662, gaya gelombang (bow seas) 37373,5 N, gaya gelombang (quartering seas) 26659,6 N, gaya gelombang (beam seas) 25210,3 N dan 58,543 N untuk oblique environment. Perancangan mooring system mengunakan tali sintetis yang setiap ujungnya dipasang socket. Socket akan menghubungkan ponton ke bridle plate. Dari bridle plate, mooring lines terbagi menjadi 3 bagian, dengan konfigurasi mirip dengan tripod. Tegangan yang terjadi pada mooring system berkisar antara 0 – 10,587 N/mm2. Factor of safety yang terburuk terjadi pada komponen yang terhubung langsung dengan bridle plate

Analisa Laju Korosi Pada Pelat Baja Karbon Dengan Variasi Ketebalan Coating Yudha Kurniawan Afandi; Irfan Syarif Arief; Amiadji Amiadji
Jurnal Teknik ITS Vol 4, No 1 (2015)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Baja karbon rendah adalah baja yang paling banyak digunakan sebagai bahan pembuatan kapal. Sebagai moda transportasi yang beroperasi pada lingkungan laut yang korosif, maka diperlukan suatu perlindungan coating agar korosi yang terjadi bisa diperkecil. Pada pengujian ini, coating sengaja divariasikan ketebalannya. Hal ini mengacu pada tidak meratanya proses coating pada pelat lambung kapal, dikarenakan pengerjaan coating dilakukan secara manual dengan area yang dicat cukup luas. Sehingga kemungkinan terlalu tebal ketebalan coating bisa saja terjadi di area tertentu. Sistem coating yang diuji ada dua, yaitu sistem coating dua lapis dengan menggunakan cat Alkyd dan sistem tiga lapis dengan menggunakan cat Epoxy. Pengujian dan perhitungan laju korosinya dengan menggunakan metode elektrokimia. Dari hasil perhitungan dapat disimpulkan bahwa semakin tebal lapisan suatu coating tidak menjamin coating tersebut dapat melindungi dengan sempurna. Semakin tebal suatu coating memiliki resiko kegagalan coating lebih besar seperti, berkurangnya fleksibilitas, terjadinya pengerutan, atau pengeringan yang tidak sempurna.

Design of Flettner Rotor in Container Carrier 4000 DWT with CFD Method Irfan Syarif Arief; Agoes Santoso; Abdullah Azzam
International Journal of Marine Engineering Innovation and Research Vol 2, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Flettner rotor is a technology that utilizes the natural wind to help the oncoming vessel. The working principle of the flettner rotor corresponds to the theory of magnus effect, in which the force arises due to the difference in pressure between the two sides of the flettner rotor. In this research the simulated flettner rotor has a diameter of 3 meters with a height of 18 meters. Simulations were performed 16 times with variations performed on rotation of rotor (0, 100, 300, and 500 rpm) and wind speed (5, 10, 15, and 20 knots). Flettner rotor analysis is done by computational fluid dynamic method. CFD results state that the largest coefficient lift value is on the flettner rotor with rotation 500 rpm with wind speed 20 knots that is equal to 91,13. While in its use of 4000 DWT container vessel, flettner rotor is more work at the speed of vessel 10 knot with rotation speed of flettner rotor 500 rpm and wind speed 5 knot that is equal to 17,438% from force that must be expended to move ship.

Performance Analysis Rim Driven Propeller as a Propulsor using Open Water Test Agoes Santoso; Irfan Syarif Arief; Anggara Tio Kurniawan
International Journal of Marine Engineering Innovation and Research Vol 2, No 1 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

The use of duct in propeller is one of the breakthrough in the development of the propeller. Ducting not only claimed to be increasing efficiency of the propeller, but also capable to protect the propeller from impact therefore propeller lifespan is longer. From that idea then RDP is created. RDP propeller blade are designed to be fix at their housing called Rim, in the other word, the driving force came from it’s rim. On current RDP blade used is non-conventional blade. This thesis will discuss about design analysis of Kaplan Propeller Kaplan Ka-70 that modified on it’s thickness distribution. On this thesis data that is varied is motor load. Simulation using Open Water Test. The result, highest value of KT and KQ occur on 30% motor load and highest efficiency is 18,338% achieved on 260 Rpm.

Analysis Of Stress Distribution Connection System To Knock Down River Ferry Edi Jadmiko; Irfan Syarif Arief; Cahyo Putro Indro Suseno
International Journal of Marine Engineering Innovation and Research Vol 2, No 2 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Musi river is a wide and very long river used by local citizen for the fro. Water transportation remains the choice of local citizen though other infrastructure was built. Hence today, water transportation remains best choice because it has better time compared to landline.. This research aims to get simple solution which is quite good, effective, and quick when needed, then author made Knock Down River Ferry design. Knock Down River Ferry consists of certain size pontoon. Of course this ferry have advantages in moving and assembling. This pontoon can easly assembled in few day and various river width. In this Research there is problem identification and formulation about pontoon joints design of the ferry so force can distributed evenly when receive load.. The analysis process obtained the strength of the lock with the variety conditions of the ships, the largest stress lies on the lock number 10 on the ship moving conditions with a speed of 8 knots for 31.85 MPa with safety factor 8.635 and the lowest on the lock number 1 on the floating condition with stress for 0.91 MPa

The Effect of Span to Chord Ratio PBCF on C4-40 Wageningen Series Propeller with CFD Method Irfan Syarif Arief; Edi Jadmiko; Izzul Fikry
International Journal of Marine Engineering Innovation and Research Vol 4, No 3 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

Propeller boss cap fin is one of the efforts to increase efficiency, especially in the field of ship propulsion. boss cap fins propeller or commonly called PBCF is one of the technologies that replace the boss cap propeller technology that first exists. Increasing efficiency can certainly have an impact on fuel consumption. This study will describe changes in efficiency, thrust, torque and the phenomenon of flow in the propeller after changes in span to chord ratio of fins with a fin form in the form of NACA foil. This research begins with determining the dimensions of the propeller and its model. The next step is to design and draw the boss cap fins propeller by modifying the span to chord ratio of the fins. The final step is analyzing propeller performance with software based on fluid dynamic computation. It is believed that changes in the PBCF span to chord ratio can improve efficiency, thrust, propeller torque, and minimize the hub vortex Simulations are carried out on four variations of the span to chord ratio, namely 0.17, 0.23, 0.29 and 0.34. From this study, it can be concluded that the propeller boss cap fins can increase thrust, torque, and efficiency, but the changes of span to chord ratio PBCF have not much effect on thrust, torque, and propeller efficiency. Increasing the PBCF span to chord ratio can reduce the hub vortex on the propeller.

Analysis Effect of Duct Length– Nozzle Diameter Ratio and Tip Clearance Variation on the Performance of K-Series Propeller Irfan Syarif Arief; Tony Bambang Musriyadi; Ahmad Dwi Arta Je Mafera
International Journal of Marine Engineering Innovation and Research Vol 2, No 1 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

One type of ship propeller is a ducted propeller. Ducted propellers are propellers with sheath or duct that can increase thrust on the propeller and useful for directing the flow of water that will pass through the Propeller. In addition to improving thrust, ducted propellers can also increase torque compared with no duct. The basic theory of momentum for this ducted propeller operation has been used by Horn (1940). In order for the efficiency of the thrust to be of good value, the volume of water passing through the propeller should be as large as possible, with the smallest possible flow velocity. The most important components of ducted propeller are Ld / D and tip clearance. Ld / D is a coefficient comparison between the length of the casing / duct and the diameter of the duct, while the tip clearance is the distance between the tip of the propeller with an inner diameter of the duct. Both components are discussed in this study. The purpose of this research is to know the performance of propeller after given variation on Ld / D and tip clearance. The method used for propeller analysis is Computational Fluid Dynamic (CFD). Based on simulation result, the most optimal propeller performance is ducted propeller with Ld / D = 0.5 and tip clearance 40 mm

Horizontal Pendulum Performance Analysis with Multilevel Model Plate on Ocean Wave Electric Power Plant (PLTGL) Mukhtasor Mukhtasor; Tony Bambang Musriyadi; Irfan Syarif Arief; Ardika Wendy Cahya Saputra
International Journal of Marine Engineering Innovation and Research Vol 1, No 2 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

Abstract - With the times and the industry, the energy sources such as fossil fuels dwindling. It encourages all parties to be more advanced and developed by creating solutions to renewable energy generation with the latest innovations, one of which is the sea wave power plant - pendulum system. Ponton who uses pendulum system is one tool used to convert from ocean wave energy into electrical energy. In this study using the test conditions without using ballast onshore and off-shore testing with the ballasts. Obtained from testing the many rounds that can be generated pendulum pie plate thickness and the angle of the pontoon. To test the largest on-shore power obtained on the test using arc angle 30 °, 3 mm thick, the angle of 60o power produced 0036 watts. For testing offshore in the ballasts 12 cm, 15 cm, 17.5 cm, the largest power generated at 15 cm ballasts with 0041 watts power on pie, thick, and a tilt angle equal to the on-shore testing. Number of rounds with time, the on-shore testing that produces the greatest value in the segment with an angle of 30 °, a thickness of 3 mm the angle of 60o value obtained 0.938 rad / s. In the off-shore pengjuain is greatest in the ballasts 15 with 0847 rad / s.

Co-Authors Abdullah Azzam Agoes Santoso Ahmad Dwi Arta Je Mafera Amiadji Amiadji Anggara Tio Kurniawan Ardika Wendy Cahya Saputra Bayu Ekosaputro Cahyo Putro Indro Suseno Desta Rifky Aldara Edi Jadmiko Edi Jadmiko Hamzah Fansyuri Hari Prastowo Honey Rambu Anarki Izzul Fikry Mukhtasor Mukhtasor Toni Bambang Toni Bambang Musriyadi Tony Bambang Musriyadi Yasin Besari Mustofa Yudha Kurniawan Afandi

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