Sunnyvale Power Generation Facilities

City of Sunnyvale, 
California

Sunnyvale Power Generation Facilities

Service Type: 
Project Highlights: 
  • Power generation facilities for landfill and digester gas
  • Project phases included a feasibility study, preliminary design, final design, and construction-phase services
  • Design phase included equipment prepurchase evaluations
  • Construction phase included an operations and maintenance (O&M) manual, and conducted a training program for Sunnyvale’s operations and maintenance staff.
Power generation facilities for the City of Sunnyvale
Carollo designed power generation facilities for the City of Sunnyvale which utilize digester gas and landfill gas. These facilities include two 800-kW lean-burn engine generators.

Carollo designed power generation facilities using digester gas and landfill gas (LFG) as fuel for the City of Sunnyvale. The design included two, 800-kW, lean-burn engine generators, gas compressors, heat recovery systems, and a low pressure gas holder. Completed in four phases, the project involved a feasibility study, preliminary design, final design, and construction-phase services. The project began an investigation of existing background data and reports to determine digester and landfill gas production, electrical loads, and energy consumption.

The preliminary design phase involved an evaluation of:

  • The type, number, and size of prime movers.
  • Gas storage and blending.
  • Gas scrubbing and cleanup.
  • The low pressure fuel system.
  • The type, number, and size of gas compressors.

This phase also included a site evaluation and an equipment prepurchase evaluation. Final design involved preparing prepurchase specifications for procurement of engine/generators and preparing plans and specifications for installation of equipment, a building, and other support systems. Carollo also provided construction-phase services, prepared an operations and maintenance (O&M) manual, and conducted a training program for Sunnyvale’s operations and maintenance staff.

As part of a previous project for the City of Sunnyvale, Carollo designed a LFG collection system, a LFG pipeline from the landfill to the wastewater treatment plant, LFG blowers, and a flare system. This project became operational in 1990.