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Foreword to the Second English Edition

rst edition of this book. In this

period, the utilisation of wind turbines has undergone an upsurge which one could only

dream of then but was never predicted. It is not only the number of electricity-generating

wind turbines which are in existence now but also the advance of them into new

ﬁ

ve years have passed since I began work on the

ﬁ

elds of

-shore installation, which bears witness to this development. Starting

out from a wide variety of ideas and di

ﬀ

erent concepts, the technology of wind turbines

has now become focussed on a few practicable solutions. This standardisation process has

provided the foundation for being able to produce turbines e

ﬀ

ciently and in large numbers

and has made it possible to build up an industry which has created a considerable number

of new jobs orientated towards the future.

However, due to their very success, the utilisation of wind turbines is now encountering

problems in some areas and the con

ict in aims which exists between global protection of

the environment and opposition by conservationalists arising from the increase in numbers

of installed wind turbines can no longer be denied.Against this background, careful project

planning and

ﬂ

nding new regions for installing wind turbines is of the utmost importance

for any further development. In this second English edition of my book, which is based

on the third edition in German, I have attempted to take account of this development or

rather to keep up with it.

These general remarks about the present state of wind energy utilisation apart, I will

refrain from commenting further on the energy and environmental crises. However, I do

feel that some helpful hints on what this book is about will not be misplaced.

The title wind turbine refers to industrially developed and manufactured machines for

generating electrical power. Those looking for a do-it-yourself manual for putting together

a windwheel, as interesting a hobby as this may be, will, therefore, be disappointed. Instead,

this book is intended to give a general overview of modern wind turbine technology and

to provide a means of orientation in the associated technical and economic

ﬁ

elds and its

contents and form of representation are structured with this objective in mind.Apart from

the initial chapters, which deal with the history and physical and technical principles of

wind turbines, all subsequent chapters have been extensively revised and in some cases con-

siderably extended. An important new chapter has been added which deals with o

ﬁ

-shore

wind energy utilisation. Overall, however, the basic structure of the original book has been

retained in its successful earlier format.

I have tried to analyse and to describe the problems involved and their technical so-

lutions phenomenologically and to avoid mathematical equations as much as possible.

ﬀ

Twe n t y -

application, such as o

VI F

oreword to the

econd

nglish

dition

rst steps to the mathemat-

ical treatment of the problems described. Those who are responsible for decisions about

investments or steer the technical and scienti

ﬁ

c work do not commonly sit at the computer

themselves. However, they must have a clear picture of the state of the art, what technical

options are available and what lessons are to be learnt.

A book of this scope which touches on a variety of special disciplines cannot be written

without assistance. I must, therefore, thank the many people who have helped me along the

way and without whose contributions the book could not have been completed. Primarily,

I am very much obliged to my former colleagues at M.A.N. and, above all, to my friend

and colleague of many years, Gerald Huß, who supported me very much in the

ﬁ

rst phase

Finally, I also wish to thank all those who have assisted me in my work on these recent

editions. In particular, I am indebted to Horst von Renouard in London who translated this

second edition and who has also contributed to the clarity of the text and its presentation

with numerous suggestions. This also applies to Dr. Hilmar Schlegel who was responsible

for the typesetting and composition of the

1980

nal book. As before, Tanja Rüth again edited

the diagrams for this present edition, and Petra Schemmerer andMartin Loderer supported

me in many ways in writing the text and selecting the photos.

Last, but not least, I owe thanks to my publishers Springer Verlag for publishing this

voluminous book in its second edition.

ﬁ

Munich, April

2005

Erich Hau

Equations have been included only where a presentation of fundamental principles was

deemed to serve a better understanding but for those interested, I have indicated relevant

literature at the end of each chapter, which would provide the

of the work, as early as

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