Edy, Raden Arya Maretano (2026) Tinjauan Desain Struktur Pelampung Pada Pembangkit Listrik Tenaga Gelombang Tipe Point Absorber Menggunakan Metode Simulasi Numerik Untuk Studi Kasus Perairan Tambakrejo, Blitar. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Indonesia memiliki potensi energi gelombang laut yang besar, khususnya di pesisir selatan Jawa yang berhadapan langsung dengan Samudra Hindia, salah satunya melalui teknologi Point Absorber Wave Energy Converter (PA-WEC). Penelitian ini menganalisis performa hidrodinamika PLTGL tipe point absorber dengan tiga variasi geometri pelampung, yaitu silinder, setengah bola, dan balok (cuboid), pada kondisi gelombang representatif Perairan Tambakrejo, Blitar. Analisis dilakukan menggunakan metode Computational Fluid Dynamics (CFD) berbasis Smoothed Particle Hydrodynamics (SPH) melalui perangkat lunak DualSPHysics. Model numerik divalidasi terhadap data eksperimen terdahulu dan menunjukkan kesesuaian yang baik dengan nilai Root Mean Square Error (RMSE) sebesar 0,0073 m atau 5,78% untuk respons gerak heave. Simulasi dilakukan dengan variasi periode gelombang 3 s, 3,5 s, dan 4 s, serta variasi kedalaman perairan pasang (0,78 m), MSL (0,695 m), dan surut (0,61 m), dengan sistem Power Take-Off (PTO) direpresentasikan melalui pendekatan redaman ekuivalen. Hasil penelitian menunjukkan bahwa periode gelombang dan kedalaman perairan berpengaruh signifikan terhadap respons daya perangkat, di mana periode 4 s pada kondisi MSL menghasilkan daya sesaat terbesar dengan nilai puncak sekitar 60 W. Ketiga geometri pelampung menghasilkan pola respons yang relatif serupa, dengan setengah bola mencapai puncak daya tertinggi sekitar 65 W, sedangkan balok menunjukkan respons yang lebih konsisten. Berdasarkan perbandingan daya serap rata-rata pada seluruh variasi kondisi simulasi, geometri balok menghasilkan kinerja terbaik dengan daya serap rata-rata tertinggi pada tujuh dari sembilan skenario serta nilai rata-rata keseluruhan sebesar 4,5651 W, lebih tinggi dibandingkan silinder 4,5422 W dan setengah bola 4,4568 W. Temuan ini menunjukkan bahwa geometri balok memiliki potensi terbaik untuk diterapkan sebagai PLTGL tipe point absorber pada kondisi gelombang Perairan Tambakrejo, dan diharapkan dapat menjadi referensi bagi pengembangan teknologi energi gelombang laut yang sesuai dengan karakteristik perairan Indonesia.
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Indonesia has significant ocean wave energy potential, particularly along the southern coast of Java, which is directly exposed to the Indian Ocean, one of which can be harnessed using a Point Absorber Wave Energy Converter (PA-WEC). This study analyzes the hydrodynamic performance of a point absorber-type PLTGL using three buoy geometry variations, namely cylinder, hemisphere, and cuboid, under wave conditions representing the characteristics of Tambakrejo waters, Blitar. The analysis was conducted using a Computational Fluid Dynamics (CFD) approach based on the Smoothed Particle Hydrodynamics (SPH) method implemented in DualSPHysics. The numerical model was validated against experimental data from previous research, showing good agreement with a Root Mean Square Error (RMSE) of 0.0073 m or 5.78% for the heave response. Simulations were performed for wave periods of 3 s, 3.5 s, and 4 s, and water depths representing high tide (0.78 m), MSL (0.695 m), and low tide (0.61 m), with the Power Take-Off (PTO) system represented using an equivalent damping approach. Results show that wave period and water depth significantly affect the device's power response, with a 4 s wave period under MSL conditions producing the highest instantaneous power, reaching approximately 60 W. All three geometries produced relatively similar response patterns, with the hemisphere reaching the highest peak power of about 65 W, while the cuboid showed a more consistent response. Based on average absorbed power across all simulated conditions, the cuboid geometry performed best, yielding the highest average power in seven of nine scenarios and the highest overall mean of 4.5651 W, compared to 4.5422 W for the cylinder and 4.4568 W for the hemisphere. These findings indicate that the cuboid buoy geometry has the greatest potential for a point absorber-type PLTGL in Tambakrejo waters, and are expected to serve as a reference for developing wave energy technologies suited to Indonesian coastal waters.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Pembangkit Listrik Tenaga Gelombang, Point Absorber, Geometri Pelampung, DualSPHysics. Wave Energy Converter, Point Absorber, Buoy Geometry, DualSPHysics. |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC147 Ocean wave power. T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Raden Arya Maretano Edy |
| Date Deposited: | 17 Jul 2026 03:43 |
| Last Modified: | 17 Jul 2026 08:34 |
| URI: | http://repository.its.ac.id/id/eprint/135294 |
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Tinjauan Desain Struktur Pelampung Pada Pembangkit Listrik Tenaga Gelombang Tipe Point Absorber Menggunakan Metode Simulasi Numerik Untuk Studi Kasus Perairan Tambakrejo, Blitar. (deposited 15 Jul 2026 08:24)
- Tinjauan Desain Struktur Pelampung Pada Pembangkit Listrik Tenaga Gelombang Tipe Point Absorber Menggunakan Metode Simulasi Numerik Untuk Studi Kasus Perairan Tambakrejo, Blitar. (deposited 17 Jul 2026 03:43) [Currently Displayed]
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