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Greener Energy: The Case for Wind Power at SJU and CSB
Appendices and Charts
Appendix A
Table 1
Classes of Wind Power Densitya
|
Wind Class |
10m (33 ft) Height |
50m (164 ft) Height | ||
|
Power*(W/m2) |
Speed (mph) |
Power*(W/m2) |
Speed (mph) | |
|
1 |
0-100 |
0-9.8 |
0-200 |
0-12.5 |
|
2 |
100-150 |
9.8-11.5 |
200-300 |
12.5-14.3 |
|
3 |
150-200 |
11.5-12.5 |
300-400 |
14.3-15.7 |
|
4 |
200-250 |
12.5-13.4 |
400-500 |
15.7-16.8 |
|
5 |
250-300 |
13.4-14.3 |
500-600 |
16.8-17.9 |
|
6 |
300-400 |
14.3-15.7 |
600-800 |
17.9-19.7 |
|
7 |
>400 |
>15.7 |
>800 |
>19.7 |
a Source: UCS study, p.13.
* Wind power density is expressed in watts per square meter (W/m2) of swept rotor area, or area perpendicular to wind flow
Appendix B
Table 2
Average Wind Speed at SJU and CSB by Montha
|
Month b |
SJU-A |
SJU-B |
SJU-C |
CSB (mph) d |
|
November, 1995 |
N.A. |
N.A. |
N.A. |
12.9 |
|
December, 1995 |
N.A. |
N.A. |
N.A. |
12.1 |
|
January, 1996 |
N.A. |
N.A. |
N.A. |
12.7 |
|
February, 1996 |
10.1 |
11.5 |
12.7 |
14.7 |
|
March, 1996 |
11.0 |
12.2 |
12.8 |
14.3 |
|
April, 1996 |
10.3 |
11.7 |
13.2 |
13.2 |
|
May, 1996 |
9.8 |
11.2 |
12.7 |
13.0 |
|
June, 1996 |
8.7 |
10.3 |
12.3 |
11.0 |
|
July, 1996 |
8.8 |
10.4 |
12.1 |
11.4 |
|
August, 1996 |
8.6 |
10.2 |
11.6 |
11.2 |
|
September, 1996 |
8.7 |
10.3 |
11.5 |
11.3 |
|
October, 1996 |
12.2 |
12.5 |
N.A. |
16.5 |
|
November, 1996 |
N.A. |
N.A. |
N.A. |
11.5 |
|
December, 1996 |
9.3 |
10.0 |
N.A. |
11.7 |
|
January, 1997 |
N.A. |
N.A. |
N.A. |
14.1 |
|
Averages to Date |
9.75 |
11.03 |
12.36 |
12.77 |
a These data were obtained from the wind speed time series data.
b Some months do not contain complete data for that month.
c Anemometers A, B, and C are at three different test sites at SJU and are at a height of 82, 120, and 140 feet, respectively.
d The anemometer at CSB is at a height of 160 feet.
Chart 1
Average Monthly Wind Speed at SJU for 3 Sites
Chart 2
Average Monthly Wind Speed at CSB for 1 Site
Appendix C
Table 3
Monthly Demand and Associated Cost for Energy at SJUa
|
Month |
KWH Produced |
KWH Purchased |
Total Energy Costb |
|
July 1995 |
289,807 |
726,400 |
$55,319 |
|
August 1995 |
290,343 |
752,000 |
$55,665 |
|
September 1995 |
269,087 |
875,200 |
$63,602 |
|
October 1995 |
313,830 |
891,200 |
$67,757 |
|
November 1995 |
292,492 |
900,800 |
$73,252 |
|
December 1995 |
293,907 |
1,030,400 |
$91,258 |
|
January 1996 |
376,891 |
824,000 |
$82,884 |
|
February 1996 |
327,679 |
772,800 |
$103,106 |
|
March 1996 |
336,731 |
766,400 |
$70,334 |
|
April 1996 |
260,625 |
919,002 |
$52,683 |
|
May 1996 |
321,507 |
888,792 |
$98,314 |
|
June 1996 |
348,203 |
1,526,318 |
$68,514 |
a These numbers were obtained from Daniel Weber, Chief Engineer of SJU's Power House.
b Total energy cost includes purchased electricity, natural gas, coal, wood, and #6 fuel oil. Total energy cost excludes the cost of producing energy in house at SJU.
Chart 3
Monthly Demand for Energy at SJU
Appendix D
Table 4
Monthly Demand and Associated Cost for Energy at CSBa
|
Month |
KWH |
electricity cost |
Total Energy Costb |
|
July 1995 |
697,600 |
$33,724 |
$35,569 |
|
August 1995 |
804,800 |
$38,013 |
$39,772 |
|
September 1995 |
848,000 |
$41,969 |
$46,491 |
|
October 1995 |
779,200 |
$33,217 |
$48,737 |
|
November 1995 |
836,800 |
$33,606 |
$61,759 |
|
December 1995 |
992,421 |
$37,751 |
$65,914 |
|
January 1996 |
803,200 |
$32,591 |
$51,020 |
|
February 1996 |
827,200 |
$32,373 |
$53,801 |
|
March 1996 |
826,800 |
$32,829 |
$54,704 |
|
April 1996 |
904,819 |
$35,917 |
$59,717 |
|
May 1996 |
844,460 |
$35,205 |
$45,453 |
|
June 1996 |
655,779 |
$34,022 |
$35,927 |
a These numbers were obtained from Merlyn Jerzak, Director of the Physical Plant at CSB.
b Total energy cost includes electricity consumption plus gas consumption. Number six oil consumption is omitted from the total energy cost numbers.
Chart 4
Monthly Demand for Energy at CSB
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