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- LFC Power Systems Greenleaf No. 2 Cogeneration Plant
MTSI was retained by LFC Power Systems of Portland, Oregon, to act as Architect-Engineer for a 49.5 MW steam injected cogeneration plant to be built adjacent to the Sunsweet Growers plant at Yuba City, California. MTSI selected a General Electric LM5000 STIG gas turbine cycle as affording the means to accept the process steam load swings of the thermal host. Up to 135,000 pph of heat recovery boiler produced steam can be injected into the gas turbine, providing a large boost in electrical power output over the non-injected performance.
The heat recovery boiler was designed with the capability to supply the maximum expected growth in process steam demand at Sunsweet, up to 120,000 pph including up to 13,000 pph of 150 psi/sat steam to a two stage absorption chiller installed to reduce combustion intake air temperature by as much as 60°F. The absorption chilled water intake air cooler was selected to allow the plant to meet its peak net electrical output of 49.5 MW at ambient air temperatures of up to 115°F at the site, independent of wet bulb temperature limits.
The plant includes a custom designed intake air system with pulse clean filters and the chilled water cooling system with a T2 sensing loop controller to hold constant intake air temperature as selected at the control panel. This custom designed low inlet pressure drop air filter system is expected to save substantial annual plant fuel costs.
MTSI's scope of effort included the process, mechanical and electrical design of the power plant and the specification and selection of all components and systems. Initial firing of this plant occurred one year from the start of the project design effort.