Transcript WiND - University at Buffalo

Wind Power on Campus
Overview
• Started Fall of 2007 with Impact on Society
Groups
• Testing and comparing:
– “Wind Funneling”
– Roof top conditions
– Commercial turbines
The Process
• Identify variables (P = 0.5 x ρ x Cp x A x V3)
– Dependant on cubed wind speed!
– Cp = Coefficient of performance
• (Betz limit is theoretical max)
• Identify Resources
– WNY Wind map
– Go get the data for the specific locations
Two Groups
Turbine Design
Data Collection
Results: Design
Sample Data
Some times you get:
Good
Not so good…
Analysis: Data
100
Velocities in range
90
Percentage in range
80
70
60
50
40
30
20
10
0
<5
< 10
< 15
< 20 < 25
< 30
< 35
< 40 < 45
< 50
< 55
< 60
< 65 < 70
Velocity (range km/h)
< 75
< 80
< 85
< 90 < 95 < 100
Analysis: Data
100
% range
90
80
percentage of readings
70
60
50
40
30
20
10
0
0
<5
< 10 < 15 < 20 < 25 < 30 < 35 < 40 < 45 < 50 < 55 < 60 < 65 < 70 < 75 < 80 < 85 < 90 < 95 < 100
wind speeds km/h
Results of Analysis
Clemens
60%
Persentage of time
50%
Hochstatter
0 -5m/s
3.5 - 5 m/s
22%
60%
40%
5-7 m/s
12%
7-9 m/s 9-12 m/s >12 m/s
4%
1%
2%
30%
Hochstatter
20%
70%
10%
0%
0 -3.5m/s 3.5 - 5 m/s
5-7 m/s
7-9 m/s
9-12 m/s
>12 m/s
Range of Velocity [m/s]
Clemens
0 -3.5m/s
16%
3.5 - 5 m/s
55%
5-7 m/s
12%
7-9 m/s 9-12 m/s >12 m/s
8%
7%
2%
Clemens
Percentage og time
60%
50%
40%
30%
20%
10%
0%
0 -5m/s 3.5 - 5 m/s 5-7 m/s
7-9 m/s
Range of Velocity [m/s]
9-12 m/s
>12 m/s
Where can you find data and
more information
• Email [email protected]
• www.wings.buffalo.edu/~dsnitzer/wind