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The applicant, CENCO Electric Company (CENCO), proposes to construct a simple-cycle peaking electric generation facility consisting of one FT8 Pratt & Whitney Twin Pac, with two gas turbine engines and one nominal 50-megawatt (MW) generator. The Project, CEC Power, will be located in the City of Santa Fe Springs, Los Angeles County.


CENCO Electric Company
J. Nelson Happy, CEO
12345 Lakeland Road
P.O. Box 2108
Santa Fe Springs, CA 90670
(562) 944-6111 - Phone
(562) 903-8911 - Fax


The Project is a nominally rated 50-megawatt power plant that will utilize two natural gas-fired combustion turbine generators equipped with state-of-the-art air pollution control features. It is in response to the California initiative to bring additional power resources on-line by summer 2001.

pecifically, the Project will utilize a Pratt & Whitney FT8 Twin Pac aircraft derivative combustion turbine-generators (CTG), which have been installed in hundreds of facilities throughout the world. The Twin Pac consists of three primary units: the two gas turbine units, the single generator unit, and the single electric/control units (Figure 2). The two opposed gas turbines are directly connected to a single double-ended electric generator. The Twin Pac offers flexibility in operation, providing the ability to operate one gas turbine while the other is shut down. This results in near full-load efficiency even at half-load power. The turbine/generator and electrical control units will be housed in all-weather steel enclosures equipped with fire protection equipment and insulation for noise control.

The facility will initially be configured in simple-cycle mode so that generated energy can be dispatched quickly to meet energy demand, and will be monitored on a 24-hour basis to respond quickly to any operational issues. Given the current energy crisis, the plant is likely to run virtually continuously during the summer, and less frequently in winter. Hours of operation are expected to decrease as larger, regional plants are constructed in the coming years.

The Project will be located on CENCO Refining Company property in the City of Santa Fe Springs, within 100 feet of an existing Southern California Edison substation. The Project is consistent with the heavy industry and manufacturing activities in the area.

CENCO is currently in discussions with the California Department of Water Resources (DWR) to purchase dispatchable peaking power from this plant under a 7-year agreement. The DWR and the state of California consider it essential that additional generation resources be brought online to alleviate the state‰s predicted power shortfall. The power purchase agreement between CENCO and DWR for the power from the Project is expected to be finalized in July 2001. The agreement is anticipated to have provisions that will be assigned to the California Power Authority later this year.

Southern California Gas Company will supply the facility with pipeline quality low-sulfur natural gas that meets California Public Utilities Commission (CPUC) standards, thereby minimizing sulfur dioxide (SO2) and particulate matter (PM10) emissions. In addition, the Project will incorporate existing liquid fuel storage facilities at the site that will allow power generation during periods of natural gas curtailment.

The facility will utilize Best Available Control Technology (BACT) based on consideration of the most stringent federal, state and local requirements for simple cycle gas turbines. To reduce nitrogen oxide (NOx) emissions from the Project, a water injection system will initially be used, with selective catalytic reduction (SCR) technology installed within one year of initial operation. Demineralized water will be injected into the combustion turbines to help reduce NOx to under 25 ppm. This is a simple and proven method to reduce NOx emissions.

The SCR will ultimately be installed in the turbine exhaust. This system is considered to be best available control technology (BACT) for NOx, capable of reducing NOx emissions to 5 ppm. The system works by injecting ammonia vapor (NH3) into the flue gases, which then pass through a catalyst material. The resulting chemical reaction reduces oxides of nitrogen to harmless nitrogen and water.

An oxidation-reduction catalyst will ultimately be installed to reduce CO levels to 6 ppm and volatile organic compounds (VOC) to approximately 1 ppm. An emissions monitoring system will be provided to continuously confirm that the facility‰s emissions are within limits.

Aqueous ammonia will be delivered to the site via a tanker truck, the operation of which is regulated by the Department of Transportation. The ammonia will be stored onsite in an aboveground tank that will be housed inside secondary containment. The containment will be designed to retain a minimum of 110 percent of the storage tank volume. In addition, polypropylene balls will be used in the secondary containment area to reduce the exposed spill surface area and minimize associated vapors. An ammonia flow control system will be used to regulate the use of ammonia. Vaporization skids will be used to heat the ammonia and inject it into the SCR system.

In addition to the containment measures listed above, a secondary containment system (deck and curbs) will be provided for each combustion turbine, generator, transformer and other related equipment to hold any accidental releases. The secondary containment areas will hold a minimum of 110 percent of the oil capacity of the equipment.

Power generated from the Project will interconnect with Southern California Edison‰s 66 kV transmission line located immediately adjacent to the Project, on CENCO property. The existing Edison substation that currently supplies the refinery will be utilized for the power interconnection.

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