Offshore Hydrodynamics (LKB 30203) PDF

OFFSHORE HYDRODYNAMICS (LKB 30203)  Design Wave Environment Designing the optimal environment for wave energy conversion is a critical step in harnessing the power of the ocean's waves. This involves carefully studying the local wave climate, seafloor topography, and othe...

OFFSHORE HYDRODYNAMICS (LKB 30203)  Design Wave Environment Designing the optimal environment for wave energy conversion is a critical step in harnessing the power of the ocean's waves. This involves carefully studying the local wave climate, seafloor topography, and other environmental factors to identify the most suitable locations for wave energy converters (WECs). Engineers must consider factors such as wave height, period, directionality, and seasonal variations to ensure their designs can withstand the harsh marine conditions and maximize energy production.  Introduction to Wave Energy 1 Renewable and 2 Environmentally Abundant Friendly Wave energy is a renewable Wave energy conversion energy source that is systems have a relatively low abundant, predictable, and environmental impact, as has a high energy density they operate submerged in compared to other renewable the ocean and do not require sources like solar and wind. fuel or produce emissions. 3 Global Potential The global wave energy potential is estimated to be over 29,500 TWh per year, with significant untapped resources in many coastal regions.  What is a Design Wave Environment? Fostering Creativity A design wave environment is a workspace intentionally designed to inspire creativity, collaboration, and innovation. It encourages out-of-the-box thinking and provides the tools and resources needed to turn ideas into reality. Collaborative Spaces These environments feature open, flexible layouts that facilitate interactive brainstorming, cross-functional teamwork, and the free flow of ideas. Adaptable furniture, whiteboards, and digital collaboration tools enable seamless knowledge sharing. User-Centric Focus At the heart of a design wave environment is a deep understanding of user needs and behaviors. By placing the user experience at the forefront, teams can develop intuitive, human-centered solutions that delight customers.  Wave Energy Conversion Process 1 Wave Interaction The wave energy conversion process begins with the interaction between the waves and the wave energy converter (WEC) device, which captures the kinetic and potential energy of the waves. 2 Prime Mover The captured wave energy is then used to drive a prime mover, such as a hydraulic piston or an oscillating water column, which converts the wave motion into mechanical energy. 3 Electricity Generation The mechanical energy is then used to drive an electrical generator, which converts the mechanical energy into electrical energy that can be fed into the grid.  Wave Energy Converter Technologies Point Absorbers Oscillating Wave Surge Overtopping Devices Converters Point absorbers are floating devices Oscillating wave surge converters are Overtopping devices use a ramp to that oscillate with the wave motion, hinged devices that are positioned capture the wave energy, which then driving a generator to produce perpendicular to the wave direction, and flows into a reservoir and drives a electricity. They are typically small and they convert the surge motion of the turbine to generate electricity. They are can be deployed in arrays. waves into electricity. typically located near the shoreline. Design Considerations for Wave Environment Wave Climate Seafloor Topography The local wave climate, including The seafloor topography and wave height, period, and bathymetry can significantly directionality, is a critical factor in impact the wave energy resource designing wave energy and must be considered when converters that can efficiently selecting suitable locations for capture and convert the available wave energy conversion devices. wave energy. Environmental Conditions Other environmental factors, such as water depth, currents, and seasonal variations, can also affect the performance and survivability of wave energy converters and must be taken into account during the design process.  Computational Fluid Dynamics (CFD) Modeling Wave Modeling CFD modeling can be used to accurately simulate the complex interactions between waves and wave energy converter devices, allowing engineers to optimize their designs. Fluid Dynamics CFD techniques can model the fluid dynamics, including turbulence and vortex shedding, that affect the performance and loading on wave energy converters. Numerical Simulations Numerical simulations using CFD can provide valuable insights into the hydrodynamic performance of wave energy converters, without the need for costly physical prototypes. Physical Modeling and Experimentation Scale Models Physical scale models of wave energy converters are tested in wave tanks and other experimental facilities to validate numerical simulations and optimize device designs. Measurement Techniques Advanced measurement techniques, such as high-speed cameras and pressure sensors, are used to capture detailed data on the performance and loading of wave energy converter models. Iterative Design The insights gained from physical modeling and experimentation are then used to refine the numerical models and further optimize the wave energy converter design.  Challenges and Future Directions in Wave Energy 1 Cost Reduction One of the key challenges in wave energy is reducing the capital and operational costs of wave energy converters to make them economically competitive with other renewable energy sources. 2 Reliability and Survivability Improving the reliability and survivability of wave energy converters in the harsh marine environment is crucial for the long-term viability of the technology. 3 Advanced Designs Researchers are exploring innovative wave energy converter designs, such as floating offshore platforms and hybrid systems, to unlock the full potential of wave energy.  THANK YOU Ts. Dr. Khairul Anuar Mat Saad Senior Lecturer, MET Section, UniKL MIMET [email protected]