WIND ENERGY Renewable Energy and the Environment © 2009 by Taylor & Francis Group, LLC WIND ENERGY Renewable Energy and the Environment VaughnVaughn NelsonNelson CRC Press Taylor Si Francis Group BocaBoca RatonRaton LondonLondon NewNewYor Yorkk CRCCRC PressPress isis an an imprintimprint ofof thethe TaylorTaylor && FrancisFrancis Group,Group, anan informa informa businessbusiness © 2009 by Taylor & Francis Group, LLC CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2009 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Printed in the United States of America on acid-free paper 10 9 8 7 6 5 4 3 2 1 International Standard Book Number-13: 978-1-4200-7568-7 (Hardcover) This book contains information obtained from authentic and highly regarded sources. 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TJ820.N44 2009 621.31’2136--dc22 2009000877 Visit the Taylor & Francis Web site at http://www.taylorandfrancis.com and the CRC Press Web site at http://www.crcpress.com © 2009 by Taylor & Francis Group, LLC Contents Series Preface .................................................................................................................................xi The Series Editor .......................................................................................................................... xv Preface..........................................................................................................................................xvii The Author....................................................................................................................................xix Chapter 1 Introduction......................................................................................................................................1 1.1 History.................................................................................................................................1 1.1.1 Dutch Windmill.....................................................................................................1 1.1.2 Farm Windmill ......................................................................................................2 1.1.3 Wind Chargers.......................................................................................................4 1.1.4 Generation of Electricity for Utilities ...................................................................5 1.2 Wind Farms .......................................................................................................................10 1.3 Small Systems ...................................................................................................................11 Links............................................................................................................................................11 References...................................................................................................................................11 Chapter 2 Energy ............................................................................................................................................. 13 2.1 Philosophy.........................................................................................................................13 2.1.1 Advantages/Disadvantages of Renewable Energy ..............................................13 2.1.2 Economics...........................................................................................................13 2.2 Definition of Energy and Power........................................................................................14 2.3 Fundamentals Concerning Energy ....................................................................................15 2.4 Energy Dilemma in Light of the Laws of Thermodynamics.............................................16 2.4.1 Conservation........................................................................................................16 2.4.2 Efficiency ............................................................................................................16 2.5 Exponential Growth ..........................................................................................................18 2.6 Use of Fossil Fuels............................................................................................................21 2.6.1 Oil and Natural Gas.............................................................................................21 2.6.2 Coal .....................................................................................................................23 2.7 Nuclear ..............................................................................................................................24 2.8 Mathematics of Exponential Growth ................................................................................25 2.8.1 Doubling Time ....................................................................................................25 2.8.2 Resource Consumption .......................................................................................25 2.9 Lifetime of a Finite Resource............................................................................................26 2.10 Summary ...........................................................................................................................27 Links............................................................................................................................................28 References...................................................................................................................................28 General ........................................................................................................................................29 Questions/Activities ....................................................................................................................29 v © 2009 by Taylor & Francis Group, LLC vi Contents Order of Magnitude Estimates ....................................................................................................30 Problems......................................................................................................................................30 Chapter 3 Wind Characteristics..................................................................................................................... 33 3.1 Global Circulation.............................................................................................................33 3.2 Extractable Limits of Wind Power....................................................................................33 3.3 Power in the Wind.............................................................................................................35 3.4 Wind Shear........................................................................................................................37 3.5 Wind Direction..................................................................................................................41 3.6 Wind Power Potential........................................................................................................41 3.7 Turbulence.........................................................................................................................43 3.8 Wind Speed Histograms....................................................................................................44 3.9 Duration Curve..................................................................................................................45