Analisis Pengaruh Parameter Geometrik Terhadap Performa Pelamis Wave Energy Converter untuk Kondisi Gelombang Indonesia

Prasukma, Andri Eko (2026) Analisis Pengaruh Parameter Geometrik Terhadap Performa Pelamis Wave Energy Converter untuk Kondisi Gelombang Indonesia. Masters thesis, Institut Teknologi Sepuluh November.

Text 6007231034-Master_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (2MB) | Request a copy

Abstract

Penelitian ini menganalisis pengaruh parameter geometrik Pelamis Wave Energy Converter (WEC)—panjang segmen, diameter body, massa struktur, dan draft—terhadap performa konversi energi untuk kondisi gelombang Indonesia. Energi gelombang laut di Indonesia diperkirakan memiliki potensi sekitar 63 GW namun belum dimanfaatkan, sehingga optimasi desain WEC menjadi relevan untuk mendukung transisi energi rendah karbon. Pemodelan dilakukan pada Pelamis satu segmen menggunakan simulasi numerik berbasis MATLAB yang mencakup gelombang laut, dinamika body, sistem hidrolik Power Take-Off (PTO), dan generator listrik. Simulasi parametrik mencakup 600 kombinasi desain dengan variasi panjang 15–55 m, diameter 2,5–4,5 m, draft ratio 0,3–0,7, dan massa struktur 24–287 ton pada gelombang reguler, untuk memperoleh daya rata-rata, efisiensi konversi energi, dan capture width ratio (CWR) serta menentukan konfigurasi geometrik optimal. Konfigurasi optimum (L = 15 m, D = 4,5 m, DR = 0,3, mb = 24 ton) kemudian dievaluasi menggunakan data gelombang bulanan perairan selatan Pulau Enggano guna mengestimasi produksi energi tahunan pada kondisi laut aktual. Hasil menunjukkan bahwa parameter geometrik berpengaruh signifikan terhadap respons dinamis dan performa konversi Pelamis, dengan efisiensi total berkisar 0,94%–28,08%. Segmen pendek memberikan efisiensi lebih tinggi dibanding segmen panjang, diameter yang lebih besar meningkatkan efisiensi sekitar 20–30%, dan draft ratio rendah memberikan efisiensi sekitar 29% lebih tinggi dibanding draft ratio tinggi. Pada lokasi Enggano, konfigurasi optimal menghasilkan sekitar 126 MWh/tahun per segmen dengan efisiensi konversi rata-rata 25–28%, ekuivalen dengan kebutuhan listrik kurang lebih 35 rumah tangga dan menunjukkan distribusi energi musiman yang relatif stabil sepanjang tahun. Penelitian ini menyediakan basis desain awal parameter geometrik Pelamis WEC yang sesuai dengan karakteristik gelombang Indonesia serta metodologi simulasi terintegrasi yang menghubungkan optimasi geometri dengan evaluasi performa lokasi-spesifik, yang dapat dijadikan acuan teknis bagi perancangan pilot project dan kajian tekno-ekonomi lanjutan.
=======================================================================================================================================
This study analyzes the influence of geometric parameters of the Pelamis Wave Energy Converter (WEC)—segment length, body diameter, structural mass, and draft—on energy conversion performance under Indonesian wave conditions. Ocean wave energy in Indonesia is estimated to have a potential of about 63 GW but remains unutilized, making WEC design optimization relevant to support a low-carbon energy transition. The model is developed for a single-segment Pelamis using MATLAB-based numerical simulations that integrate the ocean wave, body dynamics, hydraulic Power Take-Off (PTO), and electric generator subsystems. A parametric simulation is conducted for 600 design combinations with variations in length (15–55 m), diameter (2.5–4.5 m), draft ratio (0.4–0.7), and structural mass (24–287 tons) under regular wave conditions to obtain average power, energy conversion efficiency, and capture width ratio (CWR), and to identify the optimal geometric configuration. The optimal configuration (L = 15 m, D = 4.5 m, DR = 0.3, mb = 24 tons) is then evaluated using monthly wave data from the southern waters of Enggano Island to estimate annual energy production under actual sea conditions. The results show that geometric parameters significantly affect the dynamic response and conversion performance of the Pelamis, with overall efficiency ranging from 0.94% to 28.08%. Shorter segments provide higher efficiency than longer segments, larger diameters increase efficiency by about 20–30%, and lower draft ratios yield around 29% higher efficiency than higher draft ratios. At the Enggano site, the optimal configuration produces approximately 126 MWh/year per segment with an average conversion efficiency of 25–27%, equivalent to the electricity demand of about 35 households, and exhibits a seasonally stable energy output profile throughout the year. This study provides an initial design basis for the geometric parameters of the Pelamis WEC adapted to Indonesian wave characteristics and an integrated simulation methodology linking geometric optimization with site-specific performance evaluation, which can serve as a technical reference for pilot project design and further techno-economic assessments

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Pelamis, energi gelombang laut, parameter geometrik, simulasi MATLAB, efisiensi konversi energi
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC147 Ocean wave power. T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Andri Eko Prasukma
Date Deposited:	25 Feb 2026 05:27
Last Modified:	25 Feb 2026 05:27
URI:	http://repository.its.ac.id/id/eprint/132598

Actions (login required)

View Item