SIMULATION AND EXPERIMENTATION OF BUOY HEAVING MOVEMENT AS OCEAN WAVE ENERGY CONVERTER
The advancing of technology causes the increasing of energy demand. Fossil fuel is one of energy sources, which until now is the main energy source used by the world. But burning fossil fuel causes a new problem that will be faced by the world which is the forming of combustion compounds that can le...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/35838 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The advancing of technology causes the increasing of energy demand. Fossil fuel is one of energy sources, which until now is the main energy source used by the world. But burning fossil fuel causes a new problem that will be faced by the world which is the forming of combustion compounds that can lead to the climate change and damaging earth’s ozone layer. Renewable energy (RE) source is one of the solutions to overcome those problems that caused by the massively usage of fossil fuel. One example of RE that has the potential to be used in Indonesia is the energy derived from ocean waves since 2/3 of Indonesia's total area is ocean.
This study aims to find the equation of buoy response on ocean wave for both regular and irregular waves. Using engineering equation solver (EES) as a software to simulate for validating the equation on references and experimental results. The result is an equation that has been validated and can be used as an equation to get an important variables in choosing an ideal buoy to be used in WEC with wave characteristics as its input, which are displacement, power and power ration.
Based on simulation results, mass and contact area of buoy with sea water are the important factors for buoy response. For the regular wave, the larger the buoy mass is, the smaller the displacement that it gets. The greater the contact area is, the greater and better power that produced by the buoy. For irregular waves, the graphs of both power and power ratio are experiencing a shift. The biggest power of a 1/4 submerge buoy is in between 5 to 10 seconds of wave period with its largest value is 15 kW at wave period of 7 second, while the 1/2 submerge buoy is from 10 second wave period and after with its largest value is 12.4 kW at wave period of 11 second and a 3/4 submerge buoy will not be the biggest power producer but its maximum power is 6.8 kW at the 14 second wave period. The biggest power ratio of 1/4 submerge buoys is in the wave period of 6 to 11 second with the largest value of 0.92 at wave period 8 second, while the 1/2 submerge buoy in the wave period of 11 to 15 second with the largest value of 0.83 at wave period of 12 period second, and for 3/4 submerge buoys is from 15 second wave period and after with the largest value of 0.79 in the 16 second wave period. |
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