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Tidal current power in Capalulu strait, North Maluku: A feasibility study

1Ocean Engineering Program, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jl. Ganesha No.10, Lb. Siliwangi, Bandung, Jawa Barat 40132, Indonesia

2School of Engineering, The University of Edinburgh, Edinburgh EH9 3JL, United Kingdom

3Mechanical Enginering Program, Sekolah Tinggi Teknologi Angkatan Laut, Jl. Bumi Moro, Morokrembangan, Surabaya, Jawa Timur 60178, Indonesia

Received: 6 Aug 2023; Revised: 16 Feb 2024; Accepted: 12 Mar 2024; Available online: 20 Mar 2024; Published: 1 May 2024.
Editor(s): H Hadiyanto
Open Access Copyright (c) 2024 The Author(s). 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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Abstract

The Indonesian government has set goals for increasing the use of renewable energy in the coming years. Currently, Indonesia relies heavily on non-renewable energy sources, which poses a threat to the environment due to the country's growing energy needs. This study aims to assess the potential for developing a tidal power plant in Capalulu Strait, North Maluku. Using hydrodynamic modelling, the study identified two potential locations at coordinates 1.877°S – 125.328°E (Capa-2) and 1.863°S – 125.323°E (Capa-4) which were selected for having median current speeds exceeding 1.8 m/s and maximum current speeds exceeding 3.5 m/s. The study tested a hypothetical implementation of KHPS Gen5 instrument(s) by Verdant Power, a 5 m diameter turbine with a rated nominal power of 37 kW and a maximum rated power of 56 kW. A power plant layout was designed to be placed at Capa-2 and Capa-4, each location accommodating 45 turbines. The development of this power plant is estimated to produce up to 22 GWh per year. Financial analysis resulted in a LCOE of IDR 5,930/kWh. However, this price is still high compared to the national electricity tariff of IDR 1,027.70/kWh. Variations in the number of turbines also may not result in a lower LCOE than the national tariff. Nevertheless, the estimated cost of generating electricity is still competitive compared to diesel, which is around IDR 5,804/kWh.

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Keywords: Renewable Energy; Tidal Current; Hydrodynamic Modelling; LCOE; Capalulu Strait

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