Analysis of actual output from three windfarms using Vestas 600kW turbines.
Windfarm name |
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Chrisianstal, Germany |
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Seaforth Docks, Liverpool |
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Tusllagh, Co Kerry |
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Installed Cap MW |
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9.9 |
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3.6 |
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15.18 |
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Theor. Output MWh |
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86724 |
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31536 |
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132976.8 |
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Year |
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Actual |
Actual % |
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Actual |
Actual % |
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Actual |
Actual % |
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Output |
Theoretical |
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Output |
Theoretical |
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Output |
Theoretical |
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MWh |
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MWh |
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MWh |
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2000 |
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5174 |
16.4066 |
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0 |
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2001 |
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17300 |
19.9483 |
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8290 |
26.2874 |
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30,765 |
23.1356 |
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2002 |
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0 |
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0 |
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Jan |
2400 |
33.20880 |
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Jan |
1058 |
40.25875 |
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Jan |
5812 |
52.44824 |
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Feb |
2700 |
37.35990 |
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Feb |
1447 |
55.06088 |
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Feb |
5759 |
51.96996 |
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March |
1900 |
26.29030 |
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March |
765 |
29.10958 |
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March |
3087 |
27.85749 |
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April |
1218 |
16.85346 |
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April |
617 |
23.47792 |
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April |
3957 |
35.70848 |
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May |
24 |
0.332088 |
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May |
11 |
0.418569 |
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May |
32 |
0.288772 |
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June |
1223 |
16.92265 |
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June |
748 |
28.46270 |
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June |
3623 |
32.69442 |
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6Month Av |
9465 |
21.8278 |
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6 Mth Av |
4646 |
29.4647 |
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July |
1999 |
18.03923 |
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7 mth Av. |
24269 |
31.0259 |
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| Data taken from manufacturer's data sheets on Vestas windturbines, showing the variability in output year on year and month on month |
| The annual figures show a range from 31% to 16.4% in the actual output (Load Factor) as a percentage of the theoretical output.(installed capacity) |
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| The monthly figures show a range of from 55% to 0.3%. |
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| The overall average is 23.9% |
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