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All Journal Jurnal Teknik ITS International Journal of Marine Engineering Innovation and Research
Irfan Syarif Arief
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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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Design and Simulation of Axial Turbine for Ocean Thermal Energy Conversion (OTEC) Irfan Syarif Arief; Toni Bambang Musriyadi; Desta Rifky Aldara
International Journal of Marine Engineering Innovation and Research Vol 3, No 1 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.957 KB) | DOI: 10.12962/j25481479.v3i1.4076

Abstract

Decreasing in fossil energy reserves about 3% every year and has not been matched by the discovery of new energy reserves. Therefore, it is necessary to increase the use of renewable Energy to meet energy needs. Renewable energy is energy derived from sustainable natural processes. Indonesia located in the tropical area, it has a lot of potential ocean energy. OTEC (Ocean Thermal Energy Conversion) is one of many renewable energy sources from the ocean. OTEC or Ocean Thermal Energy Conversion is one of the latest technologies that used the temperature difference between deep and shallow seawater. OTEC system generally used ammonia (NH3) as working fluid. Ammonia is used because it has a relatively low boiling point compared to water. OTEC system consists of evaporators, turbines, generators, condensers, and pumps. In this research, the authors focused on the design of lab-scale OTEC turbines. 2 stage turbine will be varied the tilt which is 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 degree. The computational fluid dynamics (CFD) method is used in this research to simulate the OTEC Turbine. Based on the simulation results, the highest efficiency and net power is a 2 stage 40 degree turbine with 57.45% of efficiency and 287.25 kW of generated power
Damage Analysis of Elbow Fitting at Condenser Air Conditioning Cooling System Hari Prastowo; Irfan Syarif Arief; Hamzah Fansyuri
International Journal of Marine Engineering Innovation and Research Vol 1, No 4 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (959.536 KB) | DOI: 10.12962/j25481479.v1i4.2698

Abstract

Elbow fittings is one type of fitting on the piping installation that serves to change the flow direction. With the sudden flow of changes, it will affect the physical condition of the elbow. The flow changes in the elbow will result in changes of  flow velocity that affect wall of elbow, the condition will cause erosion corrosion phenomenon.  Erosion corrotion is a type of corrosion that uses a mechanical process through the relative movement of the flow and metal. Corrosion erosion can also be caused by impingment corrotion or very rapid flow movement. This study aims to determine the cause of damage elbow by using a CFD simulation and troubleshooting by adding a Vortex Generator or a installed disturber system in the pipeline installation and simulating it again. From the results of research conducted that elbow damage caused by high flow velocity that concerns the outer elbow. The addition of Vortex Generator is proven to be used to reduce excessive flow velocity on erosion-corroded parts. According to the results of the investigation the placement of the most efficient vortex generator if placed at a distance of 0.1 R from elbow inlet.
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