Numerical Study of the Floating Oscillating Surge Wave Energy Converter Using the Boundary Element Method

Taghipour, Haniyeh | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55553 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Raie, Mohammad
  7. Abstract:
  8. Energy production from fossil fuels such as oil and gas is one of the non-renewable energies, which causes many environmental problems such as global warming and environmental pollution. The existence of these problems has led to agreements such as the Glasgow Environmental Agreement, which obligates governments to apply methods to reduce the production of greenhouse gases, which include reducing the consumption of fossil fuels and increasing the use of renewable energy. Sea wave energy is one of the renewable energies that can be used to generate electricity. In the seas of Iran, including the Caspian Sea, Persian Gulf and Oman, there are sources of wave energy that can be used and are available. The offshore part and the deep part of the seas generally have higher wave energy potential than the areas near the coast. Floating oscillating surge wave energy converter is a suitable wave energy converter for offshore marine conditions. This converter has flaps attached to a frame that oscillates due to the incoming wave and converts the wave energy into electricity using the energy converter part. In this research, this converter was numerically modeled using the boundary element method. The boundary element method is a numerical calculation method in which the internal structure of the device is not considered, but the interactions of the boundary and the wave are considered without analyzing the forces inside the structure and by analyzing the interaction of the wave and the structure. In this research, this wave energy converter and its potential to produce electricity in the study area of Chabahar coast were investigated. In the Chabahar coast study area, the hydrodynamic efficiency of the wave energy converter with optimal stiffness and damping coefficients was 35% and its annual energy production was 208 megawatt hours. In this research, by taking into account the different directions of the incident waves and using the wave rose of Chabahar region, the hydrodynamic efficiency reached 10% and the annual energy production reached 59 megawatt hours. The highest value of the hydrodynamic efficiency of the energy converter was also obtained in the wave period of 5 seconds, which corresponds to the highest probability of sea conditions in Chabahar region.
  9. Keywords:
  10. Boundary Element Method ; Langlee Wave Energy Converter ; Sea Wave-Structure Interaction ; Wave Energy Converter (WEC) ; Floating Oscillating Surge Wave Energy Converter ; Renewable Energy Resources ; Energy Production

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