Aldara, Desta Rifky (2018) Design and Simulation of Axial Turbine for Ocean Thermal Energy Conversion (OTEC). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Indonesia menghadapi penurunan cadangan energi fosil sekitar 3% setiap
tahun (Dewan Energi Nasional, 2015), dan belum diimbangi dengan penemuan
cadangan energi baru. Oleh karena itu, perlu untuk meningkatkan penggunaan
Energi terbarukan untuk memenuhi kebutuhan energi. Energi terbarukan
adalah energi yang berasal dari proses alam berkelanjutan. Indonesia terletak
di daerah tropis, memiliki banyak potensi energi laut. OTEC (Ocean Thermal
Energy Conversion) adalah salah satu dari banyak sumber energi terbarukan
dari lautan. OTEC atau Ocean Thermal Energy Conversion adalah salah satu
teknologi terbaru yang menggunakan perbedaan suhu antara air laut dalam dan
dangkal. Sistem OTEC umumnya menggunakan amonia (NH3) sebagai fluida
kerja. Amonia digunakan karena memiliki titik didih yang relatif rendah
dibandingkan dengan air. Sistem OTEC terdiri dari evaporator, turbin,
generator, kondensor, dan pompa. Dalam penelitian ini, penulis memfokuskan
pada desain turbin OTEC skala laboratorium. 13 model turbin dirancang dan
dibandingkan untuk mendapatkan efisiensi dan daya bersih tertinggi. Metode
CFD digunakan dalam desain dan simulasi. Berdasarkan hasil simulasi,
perhitungan dilakukan untuk mengetahui debit air laut hangat dan dingin, daya
pompa, dan daya bersih sistem OTEC. Efisiensi tertinggi dan daya bersih
adalah turbin 3 stage 40 derajat dengan 350,91 kW daya yang dihasilkan, dan
efisiensi 65,02%. Terendah adalah turbin satu tahap dengan daya nett 30,87
kW, dan efisiensi 45,85%.
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Indonesia faces a 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.
Keywords— Indonesia, ocean, renewable energy, turbine, ocean thermal, OTEC, CFD
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSSP 621.43 Ald d-1 3100018077997 |
| Uncontrolled Keywords: | marine, renewable energy, turbine, ocean thermal, OTEC, CFD |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ266 Turbines. Turbomachines (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1073 Ocean thermal energy conversion |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Desta Rifky Aldara |
| Date Deposited: | 14 Oct 2020 02:11 |
| Last Modified: | 14 Oct 2020 02:11 |
| URI: | http://repository.its.ac.id/id/eprint/55499 |
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