Hugh Piggott - Windpower Workshop ...

Hugh Piggott - Windpower Workshop Building your own Wind Turbine, Dom Ogrod Ekologia, Dom Ekologiczny, ...

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Windpower
Workshop
Hugh Piggott
Foreword by Tim Kirby
British Wind Energy
Association
Windpower Workshop
BUilding Your Own Wind Turbine
Hugh Piggott
ill
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Alternative
Technology
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Publications
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Centre for
The Author
Hugh Piggott runs his own successful windpower business from
his home on the beautiful, appropriately windswept, peninsula of
Scoraig, off the coast of Scotland. There he advises individuals and
companies at home and abroad on small to medium scale
windpower turbines and systems. He has been making windmills
for twenty years from scrap parts and teaching others how to do so,
for example on the Centre for Alternative Technology's twice-
yearly windpower course. His books are amongst the Centre's best
sellers. He has a wife and two children. He has also written
It's A
Breeze! A Guide to Choosing Windpower, Scrapyard Windpower
and
Choosing Windpower
for C.A.T. Publications.
Contents
The author
3
Foreword
6
Chapter One: A Wild Resource
The wind: a wild resource
No free lunch
The environmental cost
How much power can you expect?
Efficiency: where does the energy go?
Design basics
Summary.
8
8
9
10
11
13
16
20
Chapter Two: Safety
Electrical safety
Protection against fire
Protection against shock
Battery hazards
Other responsibilities
21
21
21
23
26
27
Chapter Three: Rotor Design
Betz Revisited
Using lift and drag
Blade design
Upwind, downwind or vertical axis
Conclusion
30
30
33
38
42
47
Chapter Four: Blade Making
A word of warning
Blade weight
Blade materials
How to carve a set of rotor blades
Painting and balancing the blades
48
48
49
49
50
60
Chapter Five: Generators
What to look for
How generators work
Changing the speed of generators
Types of generator
Motors used as generators
Building a permanent magnet alternator from scrap
Design hints
In conclusion
63
63
64
78
79
84
86
92
95
Chapter Six: Mechanical Controls
Facing into the wind
Avoiding overload
Turning away from the wind
Shut down systems
96
97
99
101
105
Chapter Seven: Electrical Controls
Load control: the key to good performance
Heating systems
What batteries like best
109
109
110
115
Chapter Eight: Towers
Types of tower
How strong is strong enough?
Erection
Hands-on tower erection
Guy materials
Anchors
Hints for safe erection of tilt-up towers
So we come to the end
120
120
120
121
123
125
128
134
137
Glossary
139
Windpower Equations
146
Worked Examples
148
Access Details
153
Index
157
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