عنوان

Design and Simulation of a Self-adjustable Wave Energy Converter

Number

TL52209

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Design and Simulation of a Self-adjustable Wave Energy Converter

General Material Designation

[Thesis]

First Statement of Responsibility

Aderinto, Tunde Olukunmi

Subsequent Statement of Responsibility

Li, Hua

Name of Publisher, Distributor, etc.

Texas A&M University - Kingsville

Date of Publication, Distribution, etc.

2019

Text of Note

198 p.

Dissertation or thesis details and type of degree

Ph.D.

Body granting the degree

Texas A&M University - Kingsville

Text preceding or following the note

2019

Text of Note

Ocean wave energy resource potential is vast, and it can significantly contribute to the global energy needs if efficiently explored. However, the commercial harvesting of wave energy is still in its infancy when compared to wind and solar energy. A wave energy converter needs to be able to optimally harvest wave energy and survive the harsh ocean environment at the same time. Of the different types of available wave energy harvesting methods, one promising concept is the heaving point absorber where the heave motion due to the interaction between ocean wave and absorber's body generates power. To harvest more energy, the heaving point absorber needs to operate at the resonance region during its interaction with the ocean waves to achieve the optimum oscillation, which is the main challenge with this concept due to the irregular frequencies of the real ocean waves. This research designed a self-adjusted wave energy converter based on heaving point absorber concept that is capable of harvesting wave energy optimally at multiple frequencies and is able to survive the ocean environment during its operating and design life at the same time. Theoretical hydrodynamic and diffraction of floating bodies, computational fluid dynamics, and finite element analysis tools as well as relevant design codes of practice were applied to determine the device power capture rate, stability, static, and its fatigue responses using real ocean wave data from the Gulf of Mexico. Three objectives were set and achieved, including 1) To create a conceptual design of a self-adjusted WEC based on heaving point absorber concept through the optimization of its dimensions, 2) To simulate and estimate the energy capture of the self-adjusted WEC through the use of computational fluid dynamics and finite element analysis tools, and 3) To perform a structural reliability analysis of the self-adjusted WEC to ascertain its survivability in the ocean environment. A 10 year wave energy data from a location in the Gulf of Mexico was used to estimate the annual ocean wave energy potential. The data was also used to determine the two most prevalent ocean wave periods which formed the basis of the design and optimization of the dimensions of the wave energy converter. The time resolution of ocean wave data was shown to have considerable effect on the design and power capture of a converter. The results also shown and confirmed that wave energy converters designs are region-specific when we tested the design made for the Gulf of Mexico in another location in Oregon with 40 times wave energy potential but less captured energy. Influence of seasonal changes, diameter etc. on energy capture were also analyzed. The survivability of the ocean wave energy converter for a design life of 30 years which include both static and fatigue analysis was determined

Subject Term

Industrial engineering

Subject Term

Mechanical engineering

Aderinto, Tunde Olukunmi

Li, Hua

Texas A&M University - Kingsville

Electronic name

p

[Thesis]

276903

a

Y