Optimization of Wave Energy Convertors by Genetic Algorithm

Farshforoush Imani, Amir | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48064 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Abbaspour Tehrani Fard, Majid
  7. Abstract:
  8. Given the great potential of energy resources, the utilization of wave energy for electricity production can make a significant contribution to the renewable energy portfolio of coastal nations. There are, however, many challenges that must be overcome in order for wave energy to be commercially viable. One of the key objectives of the wave energy industry today is to produce commercially viable wave farms by placing multiple wave energy converters (WECs) together in an array. The full problem of calculating the power absorbtion of an array of WECs requires not only the complete knowledge of the hydrodynamics of each individual body, but also the scattering and radiation effects between all bodies in the array. In this thesis, the WEC array problem is investigated by semi-analytical method called Direct Matrix Method (DDM) for approximation of hydrodynamic forces on heaving cylindrical WECs and related absorbed power by power take off system (PTO) that converts the mechanical forces due to the motion of cylinder to the electricity. The interferences between cylinders could be destructive or constructive. The factors that determine the kind of this interferences such as layout of individual WECs and incident wave angle and sea conditions, investigated for different two, three, four and five body arrays in regular and irregular waves.In order to reach to optimal array with maximum constructive interference between them the genetic algorithm (GA) utilized and optimization problem was applied to three, four and five body arrays and results shown by ensuring the convergence condition
  9. Keywords:
  10. Genetic Algorithm ; Wave Energy Converter (WEC) ; Radiation ; Diffraction ; Optimization

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