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Dr. Imad Mahawili
Technology Advancement
in
Small Wind Power
Dr. Imad Mahawili Chief Technical Officer
WindTronics, LLC
Dr. Imad Mahawili
Germany, April 2005
Dr. Imad Mahawili
Germany, April 2005
Dr. Imad Mahawili
US Wind Map and Classes
Dr. Imad Mahawili
-2
0
2
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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
Typical Wind Farm Wind Chart W
ind
Sp
eed
(m
ph
)
Time
Dr. Imad Mahawili
0
2
4
6
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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
Dr. Imad Mahawili
The Future of Wind Technology
Traditional Wind Turbines WindTronics Wind Turbine
Dr. Imad Mahawili
The Future of Wind Technology: No Gears
Dr. Imad Mahawili
The Future of Wind Technology: Blade Tip Power System
Dr. Imad Mahawili
Dr. Imad Mahawili
Dr. Imad Mahawili
WindTronics WT6500 Power Curve
0
150
300
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750
900
1,050
1,200
1,350
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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
Dr. Imad Mahawili
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
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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
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
0
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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
Turbine Power Curve Comparisons
Dr. Imad Mahawili
IEC 61400 Tower Installation
Dr. Imad Mahawili
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
Dr. Imad Mahawili
N
Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
Class 4: 12.5 mph
P=140%
Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
Class 4: 12.5 mph
P=68%
Site Assessment
Computational Fluid Dynamics Modeling
Dr. Imad Mahawili
Birds Resting on the WindTronics
Turbine!
Dr. Imad Mahawili
Dr. Imad Mahawili
Dr. Imad Mahawili
Dr. Imad Mahawili
Dr. Imad Mahawili
Dr. Imad Mahawili
Dr. Imad Mahawili
Dr. Imad Mahawili
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