Environmental Engineering Reference
In-Depth Information
July 2, 2008
65,624
SO
2
(Pounds)
NO
x
(Pounds)
CO
2
(Tons)
38,110
410
10,821
6,349
-730
-1,386
Stable day emissions, 3 am to 7 am
Actual emissions, 3 am to 7 am
Actual emissions 24 hour period
-245
-392
Source: BENTEK Energy, CEMS
FIGURE 2.11
Incremental emissions resulting from cycling of Cherokee plant on July 2, 2008.
72,658
27%
1,297
2%
70,141
23%
SO
2
(Pounds)
NO
x
(Pounds)
CO
2
(Tons)
FIGURE 2.12
Incremental emissions impacts of coal plant cycling on all PSCO plants on July 2, 2008.
The same analysis was used to estimate the emissions implications of the
July 2 event for all the coal-fired plants in PSCO's resource base. The results
are summarized in Figure 2.12. Using the 24-hour event definition (Method
C) across the system, the July 2 wind event caused 70,141 pounds of SO
2
(23%
of the total PSCO coal emissions), 72,658 pounds of NO
X
(27%), and 1,297
more tons of CO
2
(2%) to be emitted than if the event had not caused the
plants to be cycled.
