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Dr. Imad Mahawili
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Technology Advancement
in
Small Wind Power
Dr. Imad Mahawili Chief Technical Officer
WindTronics, LLC
Dr. Imad Mahawili
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Germany, April 2005
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Germany, April 2005
Dr. Imad Mahawili
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US Wind Map and Classes
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-2
0
2
4
6
8
10
12
14
0 10 20 30 40 50 60
Perc
en
t o
f T
ime (
%)
WInd Speed (MPH)
Percent of Time at Wind Speed
Class 4:
Rayleigh Distribution of 12.2 MPH (5.8 m/s)
Annual Average at a Height of 33 ft (10m)
Class 6:
Rayleigh Distribution of 14.9 MPH (6.7 m/s)
Annual Average at a Height of 33 ft (10m)
Dr. Imad Mahawili
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Typical Wind Farm Wind Chart W
ind
Sp
eed
(m
ph
)
Time
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0
2
4
6
8
10
12
14
0 60 120 180 240 300 360 420 480 540 600 660 720 780 840 900 960 1020 1080 1140 1200
Time (s)
Win
d S
pee
d (
mp
h)
Typical Wind Speed Chart
Dr. Imad Mahawili
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Dr. Imad Mahawili
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The Future of Wind Technology
Traditional Wind Turbines WindTronics Wind Turbine
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The Future of Wind Technology: No Gears
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The Future of Wind Technology: Blade Tip Power System
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Dr. Imad Mahawili
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Dr. Imad Mahawili
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WindTronics WT6500 Power Curve
0
150
300
450
600
750
900
1,050
1,200
1,350
1,500
1,650
1,800
1,950
2,100
2,250
2,400
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Po
wer
(W)
Wind Speed (mph)
Cut Off
Wind Speed
Cut in
Wind Speed
Plate Power
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Turbine Power vs. Wind Speed
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
0
200
400
600
800
1,000
1,200
1,400
0 5,000 10,000 15,000 20,000 25,000
Power (W) Wind Speed
Pow
er (
W)
Win
d Sp
eed
(mp
h)
Time (s)
Dr. Imad Mahawili
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0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
0
200
400
600
800
1,000
1,200
1,400
0 50 100 150 200 250 300
Power (W) Wind Speed
Pow
er (
W)
Win
d Sp
eed
(mp
h)
Time (s)
Turbine Power vs. Wind Speed
Dr. Imad Mahawili
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Turbine Power Curve Comparisons
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IEC 61400 Tower Installation
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IEC 61400 Data Summary Wind Speed Turbine
Period Min Max Average Max Power Ave. Power Total Energy
Date (hr) (mph) (mph) (mph) (W) (W) (kWh)
12/6/11 24 10 51 28 1,481 343 8
IEC 61400 One Day Result
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N
Site Assessment
Computational Fluid Dynamics Modeling
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Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
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Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
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Class 4: 12.5 mph
P=140%
Site Assessment
Computational Fluid Dynamics Modeling
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Class 4: 12.5 mph
P=68%
Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
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Birds Resting on the WindTronics
Turbine!
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Dr. Imad Mahawili
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Dr. Imad Mahawili
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Dr. Imad Mahawili
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Dr. Imad Mahawili
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Dr. Imad Mahawili
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Dr. Imad Mahawili
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Dr. Imad Mahawili