Textbook in PDF format

A concise yet technically authoritative overview of modern marine energy devices with the goal of sustainable electricity generation With 165 full–colour illustrations and photographs of devices at an advanced stage, the book provides inspiring case studies of today’s most promising marine energy devices and developments, including full–scale grid–connected prototypes tested in sea conditions. It also covers the European Marine Energy Centre (EMEC) in Orkney, Scotland, where many of the devices are assessed. Topics discussed: global resources – drawing energy from the World’s waves and tides history of wave and tidal stream systems theoretical background to modern developments conversion of marine energy into grid electricity modern wave energy converters and tidal stream energy converters This book is aimed at a wide readership including professionals, policy makers and employees in the energy sector needing an introduction to marine energy. Its descriptive style and technical level will also appeal to students of renewable energy, and the growing number of people who wish to understand how marine devices can contribute to carbon–free electricity generation in the 21 st century. Preface Acknowledgements Introduction Marine energy and Planet Earth Marine resources Waves of the world Tides of the world A piece of history Working with waves Tapping tides Power, energy and performance Into the future References Capturing marine energy Ocean waves Linear waves Random waves Wave spectra Wave modification Wave measurement Wave energy conversion Introductory Types of wave energy converter Principles of wave energy capture Floating devices Tuning and damping When waves meet WECs Tidal streams Hydrodynamics Tidal harmonics Predicting tidal streams Tidal stream energy conversion Introductory Tidal stream turbines Turbine sizes and power ratings Extracting energy: the Betz Limit Lift and drag Rotor speed and power coefficient Turbine siting Research and development Models and test tanks The European Marine Energy Centre (EMEC) Wave and tidal test sites Research activities References Generating electricity Introductory Power take-off AC electricity Generators Introductory Synchronous generators Asynchronous generators Squirrel-cage and wound-rotor induction machines Doubly-fed induction generators Linear motion generators Connecting to the grid Setting the scene Grid strength and fault levels Electrical quality Large-scale renewable energy Introductory Intermittency and variability Capacity credit and backup generation References Case studies: Wave energy converters Introductory Case studies Pelamis Oyster Limpet and Mutriku Wave Dragon PowerBuoy Penguin References Case studies: Tidal stream energy converters Introductory Case studies Andritz Hydro Hammerfest Atlantis Resources Marine Current Turbines OpenHydro Pulse Tidal Scotrenewables Tidal Power Tidal Generation References Index