Encina Power Plant Fuel Use

Tom W. Andrews 

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:

Shaheerah Kelly 03/12/2010 04:25 PM

Cc: "Tom W. Andrews"

Ms. Kelly:

In response to the recent request by the EPA, the enclosed graph along with the corresponding data

summary tables show the fuel use for the Encina Power Plant Units 1‐5 during the period from 1997 to

2008.   Since Encina Units 4&5 are more efficient than Encina Units 1‐3, these units are dispatched

sooner, and more often, than Units 1‐3.  But if Units 4&5 are already running, then Units 1‐3 are brought

on line as well to meet peak demand.  The data shows that total Encina Power Plant generation drops as

new generation is brought on line in the San Diego area, but the operation of the Encina Power Plant

quickly recovers as demand for electricity in the San Diego area continues to grow.  So far, there has

been enough new generation coming on line in the San Diego area such that Encina Units 4&5 have been

able to handle most of the growth over the past few years (i.e., 2006 to 2008).  This has resulted in the

lower operation of Encina Units 1‐3 during this same period.  However, as discussed in our March 1,

2010 letter to the EPA,  this situation can’t go on forever, and we expect an increase in the future

operation of Encina Units 1‐3 due to the increase in electrical consumption in the San Diego area and the

increasing challenges in siting new generating resources, or transmission lines, to support this region.  

Consequently, we continue to believe that the period from 2002 to 2006 is the most representative for

calculating the actual emissions for Encina Units 1‐3.  Please let us know if you have any questions or

need any additional information.
Fuel Used for the Encina Power Plant Units 1‐5

1997 1 1998 2 1999 3 2000 4 2001 5 2002 6 2003 6 2004 6 2005 6 2006 6 2007 7 2008 7

Unit 1 1,323.4 1,632.2 622.7 2,784.9 3,712.2 1,640.0 1,275.9 1,734.3 1,661.7 551.8 685.0 89.0

Unit 2 1,306.5 1,890.0 1,492.3 2,941.6 3,941.9 2,060.8 1,673.0 2,510.7 1,823.7 1,070.4 520.0 450.0Unit 3 2,392.9 3,307.8 2,870.2 4,848.3 5,023.5 2,145.8 2,393.4 3,805.0 2,107.8 1,319.2 879.0 742.0

Unit 4 8,622.6 12,480.0 11,621.7 12,484.1 16,295.8 9,500.0 9,919.0 13,593.0 9,145.0 5,895.0 2,604.0 3,599.0

Unit 5 12,177.5 12,218.0 15,151.4 12,569.0 12,972.5 10,893.0 11,452.0 12,711.0 6,398.0 6,295.0 3,989.0 7,215.0Total 25,823.0 31,528.0 31,758.4 35,627.9 41,945.9 26,239.6 26,713.4 34,354.0 21,136.2 15,131.4 8,677.0 12,095.0Note:1. 1997 Emission Inventory Report for Encina Plant, prepared by San Diego Air Pollution Control District, 4/1/1999.

2. 1998 Emission Inventory Report for Encina Plant, prepared by San Diego Air Pollution Control District.

3. 1999 Emission Inventory Report for Encina Plant, prepared by San Diego Air Pollution Control District, 8/4/2000.

4. 2000 Emission Inventory Report for Encina Plant, prepared by San Diego Air Pollution Control District, 2/13/2002.

5. 2001 Revised Emission Inventory Report for Encina Plant, prepared by San Diego Air Pollution Control District, 4/22/2004.

6. For Units 1, 2, 3: Fuel used based on actual emission calculations in the SDAPCD's Final Determination of Compliance, Carlsbad Energy Center Project, Applications Number 985745, 985747, and 98

For Units 4 and 5: Fuel use based on the Data Response to the Center for Biological Diversity regarding the CECP, (Response to Data Requests A1 through G1), TABLE DRE3‐1, p. 10, Jan 2009.

7. Based on the Data Response to the Center for Biological Diversity regarding the CECP, (Response to Data Requests A1 through G1), TABLE DRC3‐1, p. 8, Jan 2009.

Natural Gas (mmscf/year)
Fuel Use Summary Encina Power Plant

0

5,000

10,000

15,000

20,000

25,000

30,000

0

10,000

20,000

30,000

40,000

50,000

60,000

1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

Electricity Consumption (GWh)

Natural Gas (mmscf/year)

Year

Unit 1

Unit 2

Unit 3

Unit 4

Unit 5

Electricity Consumption (GWh)

Projects Online

WildflowerPower Plant

Escondido Power Plant

BorderPower Plant

PalomarPower Plant
Annual Electricity Consumption in San Diego County (1997 ‐ 2008) 1

1997 1998 1999 2000 2001 2002 2003 2004 2005 

Total Electricity Consumption (GWh) 2 17,082.0 17,630.0 18,312.0 19,294.3 17,826.1 18,270.0 18,976.5 19,921.2 19,930.3 20

Notes:1. SDG&E data obtained from California Energy Demand 2010‐2020 Adopted Forecast, Commission Report, Chapter 4, Dec 2009, CEC‐200‐2009‐012‐C

Full Report URL: http://www.energy.ca.gov/2009publications/CEC‐200‐2009‐012/CEC‐200‐2009‐012‐CMF.PDF

2. California Energy Demand 2010‐2020 Adopted Forecast, Commission Report, Chapter 4, p. 145, Dec 2009, CEC‐200‐2009‐012‐CMF

Form 1.1 ‐ SDG&E Planning Area California Energy Demand 2010‐2020 Staff Revised Forecast Electricity Consumption by Sector (GWh)