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All Journal IJOCE (International Journal of Offshore and Coastal Engineering)
Rahmawati, Shade
Institut Teknologi Sepuluh Nopember
Engineering

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Gorlov Water Turbine Application in Ambon, Kepulauan Maluku; A Hypothetical Project Wardhana, Wisnu; Rahayu, Zahra Aisyiyah; Rahmawati, Shade; Satrio, Dendy
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 6, No 1 (2022)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v6i1.14556

Abstract

As energy demand increases, it must be balanced with sufficient energy sources to support the growth of Indonesia's electrification ratio. No exception with the development of energy demand and supply on Ambon, Maluku Islands. This study uses a Renewable Energy Power Plant, a water turbine that uses ocean currents from the flow path of an artificial canal plan in Ambon, Maluku Islands. The shape of the area is interesting things to make an artificial canal as a flow path for ocean currents from the different height at that location. Due to the height difference cannot be determined with certainty, in this study, the authors vary the height difference between the sea in the east and west, it's 1m to 5m. Current modelling uses a numerical approach using the Surface-Water Modeling System (SMS) 8.1 software simulation. Then the average current velocity in the canal in each height variation obtained. The experimental data from journal references are used in calculating the turbine torque for a full-scale afterwards adjusted to the current speed generated in each variation. The turbine with the greatest torque is selected, owned by the 4-blades Gorlov NACA0012 with 25% efficiency and 9.5m turbine diameter totalling 1 unit
Hydrodynamic Performance Analysis of Vertical Axis Water Turbine (VAWT) Gorlov Type With Hydrofoil Thickness and Inclination Angle Variables using Computational Fluid Dynamics (CFD) Approaches Wardhana, Wisnu; Rahmawati, Shade; Satrio, Dendy; Nurliana, Annisa
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 6, No 2 (2022)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v6i2.14771

Abstract

The issue of renewable and eco-friendly energy has become the focus of research in several countries to encourage eco-friendly alternative energy. One of them is by using turbines to produce electrical energy. Vertical Axis Water Turbine (VAWT) can be an exciting research object because it has various advantages. VAWT has a simpler structure, can move at relatively slow currents and is famous for its tendency to move regardless of the water flowdirections. In this study, the experimental turbine from secondary data numerically simulates using the Computational Fluid Dynamics (CFD) method with the help of ANSYS V18.1 software. The Gorlov turbine model is manufactured in 3 dimensions under steady-state flow conditions. Validation is carried out after obtained numerical results with the mean error rate being less than 10%. The variables in this research are the thickness of hydrofoil using NACA 0010, NACA 0016, NACA 0020, and variations in inclination angle of the blade for 25. After comparing the simulation results in the form of torque values is done, it is shown that the best turbine performance is given by water turbine using NACA 0016 with 60 and 60 of inclination angle.
Micro Wave Energy Farming on Slender Pile Structure Husna, Faliha; Rahmawati, Shade; Armono, Haryo Dwito
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 6, No 2 (2022)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v6i2.14770

Abstract

The development of renewable energy technology has mostly beenfocused on macro-sized farming models. Recent studies have explored the benefits of micro wave energy to support offshore sensor networks. This paper discusses the viability of micro ocean energy farming of wave energy on slender pile structure through piezoelectric converters. Case study was obtained using Tuban environmental data from the year 2004-2009. Significant wave height and period were used to generate wave forces on slender pile and converted to electrical energy using simple piezoelectric converter equations. The resulting wave force on a 0.03m thick piezoelectric plate generates voltage of 0.6 Volt.
Co-Authors Haryo Dwito Armono Husna, Faliha Nurliana, Annisa Rahayu, Zahra Aisyiyah Satrio, Dendy Wardhana, Wisnu