Assessment of Tidal Current Power Potency in Kelabat Bay, Indonesia

Abstract

Abstract-Indonesian energy production is dominated by non-renewable sources. To promote exploration of more sustainable energy sources, the current study focuses on determination of energy from tidal-current-induced power. The study includes field measurement, numerical modeling using MIKE3 (personal license), tidal model analysis, and power calculation. The field measurements include bathymetric, tidal, and current velocity surveys using an Argonaut-XR type Acoustic Current Doppler Profiler. The narrowest part of the bay is selected as the area of interest. Validation of the water elevation and current numerical model results with field measurements shows good agreement, with average errors of 5.34% for water elevation validation and 8.8% for tidal current validation. The model shows that the eastern part of the area of interest has the highest tidal-current velocity magnitude. The average and peak velocity magnitudes are 0.373 and 1.24 m/s, respectively. A Gorlov helical turbine is selected as the turbine for energy harvesting, because it has suitable height and cut-in-speed characteristics. Although the calculated generated power can only supply half of the average Indonesian consumption per capita, it is hoped that this study will provide an initial step toward sustainable power harvesting in Indonesia.Keyword -Numerical modeling, Ocean renewable energy, Tidal current, Kelabat Bay, Indonesia I. INTRODUCTION Global climate changes have been seen worldwide lately, mainly caused by mass production of nonsustainable energy in most nations including Indonesia. During 2014, the share of non-renewable energy production in Indonesia was six times higher [1] than the share of renewable production. To overcome the negative effects of climate change, the development of infrastructure for harvesting renewable energy is deemed important. The issue is how to harvest the energy as efficiently as possible. Ocean-based renewable energy should receive the foremost attention since it has abundant potential.Previous studies show that tidal current is one of the most reliable forms of potential ocean-based energy sources among ocean thermal and wave energy sources. The technology is more accessible and well-established. Studies of tidal current power extraction have been well-developed in the past few years across the globe, for example in Scotland [2], India [3], Japan [4], Canada [5], and several others [6].The potency of tidal current in Kelabat Bay (Province of Kepulauan Bangka Belitung of Indonesia) will be assessed. The scope of this study covers several areas such as field measurement, numerical modeling, tidal model analysis, turbine selection, and power calculation.II. STUDY LOCATION Kelabat Bay is located at the northern part of Bangka Island, as shown in Fig. 1. Kelabat Bay is located in the range of 565,000-591,000 mE and 9,799,000-9,832,000 mS at region 48 south of UTM coordinate. Kelabat Bay links the districts of Jebus and Kelapa of West Bangka Regency and the districts of Belinyu and Riau Silip of Bangka Regency....

The Effect of Gate Existence at L Islandon The Seabed Profile Due to Reclamation of Jakarta Bay

“…FIELD MEASUREMENT To provide accurate physical conditions at the study location, bathymetric, sea water surface elevation, and tidal current surveys were carried out. These similar surveys were also conducted in several previous studies [16][17][18].…”

“…The validity level  of the model is calculated using Eq. 1, where m  is the value resulted from numerical model, field  is the value obtained from field measurement [16][17][18], and  is the tidal range.…”

Modeling Salinity Propagation in Cikarang Bekasi Laut Channel, Bekasi Regency, West Java Province, Indonesia

“…Delft3D [8], MIKE21 [9], and SMS (Surface-water Modelling Systems) [10] are among the most popular two and three-dimensional modelling tools. The hydrodynamic modules of these tools have been extensively exploited to understand the flow patterns of water bodies [11,12], study flood risk [13], and assess the potential of ocean renewable energy [14,15].…”

Tidal Current Energy Resources Assessment in the Patinti Strait, Indonesia

“…Currently, three straits have been studied extensively for tidal current energy development, namely Lombok, Alas and Larantuka Straits, located in Bali, Nusa Tenggara region (Blunden et al, 2013;Orhan et al, 2015;Firdaus et al, 2019;Firdaus et al, 2020;Orhan & Mayerle, 2020). Besides, researchers have also demonstrated potential in other sites such as Kelabat Bay, Sunda, Boleng, Molo, and Pantar Straits (De Groot, 2012;Sudjono et al, 2014;Novico et al, 2015;Ajiwibowo et al, 2017;Pratama et al, 2020). Furthermore, summaries on multiple tidal current energy sites are provided in several previous studies (Susilohadi et al, 2014;Kementerian ESDM, 2017).…”