Designing offshore wave energy converter (WEC) devices requires a thorough understanding of many aspects of science and engineering, namely, wave hydrodynamics, wave-WEC interactions, mechanical design, analysis tools, and conducting experiments. This book provides the tools for understanding these complex systems and addresses the basic concepts of WECs through detailed analysis and design. A few devices developed and experimentally investigated are discussed in detail, some of which are considered highly novel and still in the preliminary stages of study in the existing literature.
FEATURES
Offers numerous detailed design methods and practical model studies
Presents analysis of the dynamic response behavior of WECs based on experimental studies on scale models
Covers the most recent and novel innovations in the field
Includes a discussion of offshore wind farms as a green energy alternative and examines their conceptual development and design
This book serves as a useful guide for both academicians and professionals in naval architecture and offshore engineering as well as in civil and structural engineering. In addition, it helps in the understanding of structural behavior in terms of risk criteria, efficiency, service life, and reliability. Readers will gain a comprehensive knowledge of the design and development of offshore wave energy devices and the preliminary design of offshore wind turbines, which are currently largely absent in the scientific literature.
Author(s): Srinivasan Chandrasekaran, Faisal Khan, Rouzbeh Abbassi
Publisher: CRC Press
Year: 2022
Language: English
Pages: 272
City: Boca Raton
Cover
Half Title
Title Page
Copyright Page
Table of Contents
Preface
Authors
1 Ocean Waves and Wind Forces: Basics
1.1 Ocean Environment
1.2 Wave Theories
1.3 Stoke’s Fifth-Order Theory
1.4 Wave Spectra
1.4.1 PM Spectrum for Wave Loads
1.4.2 Modified PM Spectrum (Two Parameters, Hs, ω0)
1.4.3 International Ship Structures Congress (ISSC) Spectrum (Two Parameters, Hs, ω)
1.4.4 Joint North Sea Wave Project (JONSWAP) Spectrum (Five Parameters, Hs, ω0o, γ, τa, τ).
1.5 Wind and Current
1.5.1 Wind Spectra
1.5.2 Current
Exercises
2 Perforated Cylinders and Applications
2.1 Introduction
2.2 Force Reduction in the Inner Cylinder
2.3 Effect of Annular Spacing and Perforation Ratio On Force Reduction
2.4 Effect of Perforation Parameters On Force Reduction
2.5 Twin Perforated Cylinders
Exercises
3 Floating Wave Energy Converter
3.1 Introduction
3.2 Wave-To-Wire Transfer
3.3 Numerical Modeling
3.4 Frequency-Domain Modeling
3.5 Time-Domain Modeling
3.5.1 Linear Time-Domain Model (LTD)
3.6 Computational Tools
3.7 Multibody Floating Wave Energy Converter
3.8 Hydrodynamic Coefficients of Floating Wave Energy Converters
3.9 Wave Power
3.9.1 Regular Waves
3.9.2 Irregular Waves
3.10 Performance Curves With Virtual Power Take-Off System
3.11 Analysis With Hydraulic Power Take-Off System
3.11.1 Governing Parameters
3.12 Practical Guide to Design of Hydraulic Power Take-Off System
3.13 Numerical Studies On Hydraulic Power Take-Off Systems
3.14 Floating Wave Energy Converter Response Without Power Take-Off System
3.15 Floating Wave Energy Converter With a Novel Hydraulic Power Take-Off System
3.16 Failure Assessment of Floating Wave Energy Converter
Exercises
4 Double-Rack Mechanical Wave Energy Converter
4.1 Introduction
4.2 Mechanical Wave Energy Converter
4.2.1 Equation of Motion
4.2.2 Power Take-Off System Design
4.2.3 Experimental Studies
4.3 Double Rack Mechanical Wave Energy Converter
4.3.1 Experimental Studies On Double Rack Mechanical Wave-Energy Converters
4.4 Failure Assessment
4.4.1 Conducting Design Failure Mode and Effect Analysis
4.5 Failure Mode and Effect Analysis of Mechanical Wave-Energy Converter
4.6 Deep-Ocean Wave Energy Converter: Conceptual Design
4.6.1 Geometric Design of the Device
4.7 Working Principle of Deep Ocean Wave Energy Converters
4.8 Experimental Investigations On Deep Ocean Wave Energy Converters
4.8.1 Cylindrical Float
4.8.2 Cylindrical Float Integrated With Fin
4.9 Multi-Utility Development Devices
4.9.1 Applications of TSUSUCA-DOLPHIN
4.9.2 Workable Alternatives
4.9.3 Cost Benefits
Non-patent Citations
Summary
Exercises
5 Offshore Wind Turbines
5.1 Introduction
5.1.1 Support Systems for Wind Turbines
5.2 Wind Power
5.3 Numerical Tools
5.4 Offshore Wind Turbine Classifications
5.5 Offshore Floating Wind Turbine: Components
5.6 Offshore Floating Wind Turbines
5.6.1 Single Point Anchor Reservoir Type
5.6.2 Tension-Leg Platform Type
5.6.3 Pontoon (Barge) Type
5.6.4 Semi-Submersible Type
5.6.5 Triceratops
5.6.6 Triceratops-Supported Wind Turbines
5.7 Experimental and Numerical Analyses
5.8 Mathematical Background
5.8.1 Blade Momentum Theory
5.8.2 Blade Element Theory
5.9 Aero-Elastic Model
5.9.1 Kane Method
5.9.2 Wind Load
5.9.3 Wind Shear Effect
5.10 Normal Turbulence Model
5.11 Wind Spectrum
5.12 Numerical Analysis of Triceratops-Supported Wind Turbine
5.13 Responses Under Operable Loads and Parked Conditions
5.14 Dynamic Tension Variation of Tethers
Exercises
References
Index
