EETS INC

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Combined Cycle

The term “combined cycle” describes a process where a gas turbine generator produces electricity, and the waste heat is then utilized to generate steam (and additional electricity) through a steam turbine. This method is highly efficient for large industrial plants, particularly in the food industry. Incorporating the steam cycle into the gas turbine cycle increases the electricity generated from a specific amount of natural gas. As a result, this leads to greater fuel efficiency and fewer emissions per unit of electricity generated than would be produced by the gas turbine alone.

SPOTLIGHT

Combined Cycle Projects

Sacramento, California

Proctor & Gamble

Proctor & Gamble and the Sacramento CoGeneration Authority enhanced the capacity of three combustion turbines and one steam turbine at the P&G facility in Sacramento. Combustion turbine #1, along with the steam turbine, formed a combined cycle unit. Before the upgrade, this system generated 164MW of
electricity for the grid and provided process steam for the manufacturing facility. The existing facility included two 42.5MW gas-fired combustion turbines, two heat recovery steam generators, and a 35MW steam turbine generator across two combined cycle systems. Additionally, there was a natural gas-fired 45MW combustion turbine simple cycle peaker unit. The threefold upgrade aimed to increase output by 22MW, enhance thermal efficiency, and reduce pollutant emissions from the combustion turbines. EETS engineers were tasked with reviewing all electrical facilities, the upgraded turbines, and related generator step-up transformers to ensure all equipment ratings were sufficient for the increased output. Their detailed analysis encompassed generator step-up transformer loading and all aspects of the steam turbine upgrades, including the generator, switchgear, bus duct, voltage variation, temperature, and loss of life calculations.
Proctor & Gamble and the Sacramento CoGeneration Authority enhanced the capacity of three combustion turbines and one steam turbine at the P&G facility in Sacramento. Combustion turbine #1, along with the steam turbine, formed a combined cycle unit. Before the upgrade, this system generated 164MW of electricity for the grid and provided process steam for the manufacturing facility. The existing facility included two 42.5MW gas-fired combustion turbines, two heat recovery steam generators, and a 35MW steam turbine generator across two combined cycle systems. Additionally, there was a natural gas-fired 45MW combustion turbine simple cycle peaker unit. The threefold upgrade aimed to increase output by 22MW, enhance thermal efficiency, and reduce pollutant emissions from the combustion turbines. EETS engineers were tasked with reviewing all electrical facilities, the upgraded turbines, and related generator step-up transformers to ensure all equipment ratings were sufficient for the increased output. Their detailed analysis encompassed generator step-up transformer loading and all aspects of the steam turbine upgrades, including the generator, switchgear, bus duct, voltage variation, temperature, and loss of life calculations.

Sacramento, California

Campbell Soup

The Sacramento Municipal Utility District (SMUD) and Campbell Soup contracted EETS for the electrical infrastructure work on this co-generation project. The facility, designed to replace large boilers, employs Siemens gas turbines to generate 146MW of electricity. Furthermore, steam produced using recycled water from the soup plant is utilized in the soup processing operations.

Generation Projects