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Performance of TVA's Buffalo Mountain Wind Power Plant

The Bottom Line

December 27, 2003

For data recently released by TVA, through November 30, 2003

Capacity Factor versus Time
The figure above, showing capacity factor versus time, and table below, with some additional data, summarize the plant's historical electricity production, based on the recently released update from TVA.
As always, TVA still refuses to provide timely or detailed information regarding the performance of their wind power plant, even when requested under the Freedom of Information Act.
TVA continues the practice of inconsistent data reporting, having not previously reported results at the end of November. Despite the efforts to obscure the data, simple interpolation between October 2002 and January 2003 yields the following approximate results.

Annual energy production from November 30, 2002 to November 30, 2003 was approximately 3.92 million kilowatt hours, which is slightly higher than the last two reports (approximately 3.66 million kilowatt hours from August 31, 2002 to August 31, 2003, and (3.74 million kilowatt hours, from April 2002 to April 2003). Compare this production with TVA's original announced, annual goal (pre-operations) of 6 million kilowatt hours, and TVA's announced revised annual goal (2002) of 4.6 million kilowatt hours. They need to achieve 27% capacity factor to meet the revised goal.

Over a total of about 37 months of operations, having produced a total of 11.4 million kilowatt hours of energy, the plant has averaged approximately 3.7 million kilowatt hours per year, or about 19% below the revised goal.

The capacity factor for the latest 3 month period was about 25.0%, which is slightly above the long-term, lifetime average capacity factor of about 21.3%.

In other recent TVA "Green" Power news, while TVA's latest newsletter focused on "education" of children about the benefits of "green" power, TVA and Innogy announced the demise of the remaining Regenesys energy storage projects. This comes almost exactly 3 years after "the Regenesys technology won the Most Promising Pre-Commercial Technology Development Award in the Financial Times 2000 Energy Global Awards competition," despite the supposed benefits previously publicized by TVA.


Date
Actual
Total
Production
Million
Kilowatt
hours
Theoretical
Capacity
Million
Kilowatt
hours

Lifetime
Capacity
Factor
%
Capacity
Factor
For
Period
%
Days
Since
Start
November 1, 2000 - "Operational Date"
(Actual Start of Operations - Oct. 12)
0
0
n/a
n/a
0
March 31, 2001
1.2
7.2
16
16
151
June 30, 2001
2.1
11.5
19
22
242
September 30, 2001
2.6
15.9
16
9
334
December 31, 2001
3.9
20.2
19
30
426
February 28, 2002
4.8
23.0
21
33
485
April 30, 2002  
5.8
25.9
22
33
546
July 31, 2002  
6.4
30.3
21
16
638
October 31, 2002  
7.0
34.7
20
13
730
January 31, 2003
8.3
39.1
21
30
822
April 30, 2003
9.5
43.3
22
27
911
August 31, 2003 (PDF)
10.3
49.1
21
14
1034
November 30, 2003
11.4
53.5
21
25
1125

Previous Bottom Line Reports:
October 2003
July 2003
April 2003
December 2002
October 2002
June 2002
April 2002
March 2002
January 2002
November 2001

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