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Numerical Analysis of Energy Converter for Wave Energy Power Generation-Pendulum System

1Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Jenderal Soedirman, Indonesia

2Research and Development Center of New and Renewable Energy, Universitas Jenderal Soedirman, Jl. dr. Suparno, Karangwangkal Purwokerto-Jawa Tengah 53123,, Indonesia

3Department of Educational Physics, Faculty of Education and Teacher Training, Univ. Islam Negeri Ar-Raniry, Jl. Syekh Abdur Rauf Kopelma Darussalam, Banda Aceh, 23111, Indonesia

4 Department of Physics, Faculty of Science, Institut Teknology Sumatera, Jl. Terusan Ryacudu, Way Hui, Jati Agung-Lampung Selatan, 35365, Indonesia

5 Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Padang, Jl. Prof. Dr. Hamka, Air Tawar Padang, Sumatera Barat, Indonesia

6 Department of Physics, Faculty of Mathematics and Natural Science, Universitas Jenderal Soedirman, Jl. dr. Suparno 61 Karangwangkal Purwokerto-Jawa Tengah 53123, Indonesia

7 Department of Physics, Faculty of Mathematics and Natural Science, Universitas Hasanuddin, Jl. Perintis Kemerdekaan 10, Tamalanrea,Makassar, 90245, Indonesia

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Received: 17 Feb 2020; Revised: 6 Mar 2020; Accepted: 20 Apr 2020; Available online: 10 May 2020; Published: 15 Jul 2020.
Editor(s): H Hadiyanto
Open Access Copyright (c) 2020 The Authors. Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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The wave energy power generation-pendulum system (WEPG-PS) is a four-wheeled instrument designed to convert wave power into electric energy. The first wheel is connected to the pendulum by a double freewheel, the second and third are ordinary wheels, while the fourth is a converter component that is axially connected to the electric generator. This design used the Euler-Lagrange formalism and Runge-Kutta method to examine an ideal dimension and determine the numerical solution of the equation of motion related to the rotation speed of the wheels. The result showed that the WEPG-PS' converter system rotated properly when its mass, length, and moment of inertia are 10 kg, 2.0 m, and 0.25 kgm2, respectively. This is in addition to when the radius of the first, second, third, and fourth wheels are 0.5, 0.4, 0.2, and 0.01 m, with inertia values of 0.005, 0.004, 0.003, and 0.1 kgm2. The converter system has the ability to rotate the fourth wheel, which acts as the handle of an electric generator at an angular frequency of approximately 500 - 600 rad/s. The converter system is optimally rotated when driven by a minimum force of 5 N and maximum friction of 0.05. Therefore, the system is used to generate electricity at an amplitude of 0.3 - 0.61 m, 220 V with 50 Hz. Besides, the lower rotation speed and frequency of the energy converter of the WEPG-PS (300 rad/s) and induction generator (50 Hz) were able to generate electric power of 7.5 kW. 

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Keywords: Wave; Electric; Euler-Lagrange; Runge-Kutta
Funding: the Research and Public Service Institute of Universitas Jenderal Soedirman (LPPM UNSOED)

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