Recent Projects

Significant recent alternative & renewable energy assignments include the following:

Wind Farm Grid Interconnection
Sargent & Lundy performed engineering for the interconnection of the Horizon Wind Energy Twin Groves Wind Farm to the Commonwealth Edison transmission network. Our engineering and design included the 34.5/345 kV substation at the termination of the wind generator collection system, 16 miles of 345-kV transmission line, a 345 kV substation, a 3-breaker ring bus adjacent to the existing transmission line, and coordinating the interface of the protection and control systems. The project was constructed in two phases, each generating 200 MW of power. Phase II was completed at the end of 2007. The facility includes 267 wind turbine generators, with a rated capacity of 1.5-1.65 megawatts each. Project Profile: Twin Groves Wind Farm Interconnection
Wind Turbine Foundation Assessments
We performed several recent independent assessments of wind turbine foundations on several projects for a wide range of wind turbine manufacturers. The scope included independent 3rd party foundation analysis and design, including evaluation of the dynamic rotational stiffness relative to wind turbine manufacturer requirements, and an overall evaluation of foundation designs and construction plans.
Assessment of Renewable Alternatives
For a regional utility, we performed a technology survey and analysis investigation of commercially available renewable energy technologies including wind power, biomass thermal, geothermal, solar thermal, and solar photovoltaic technologies.
Global Solar Technologies Assessment
Working for the U.S. Department of Energy (DOE/EERE) and in close collaboration with the National Research Council, we performed a comprehensive review and update of the global development of solar power technologies. The resulting report is widely referenced in the industry and is available from the National Renewable Energy Laboratory's Web site.
Hydroelectric Development, Design, and Commissioning
Our hydroelectric generation assignments in the past decade have included every aspect of development, financing, siting, design, construction, commissioning, operation, and asset transfer for owners, lenders, and developers.
Integrated Solar /Combined-Cycle Plant Feasibility
Working for the World Bank, we assessed the feasibility of an integrated solar combined cycle plant (ISCC). Our scope included technical and contractual reviews, as well as a review of the integration between the solar and combined cycle islands.
Landfill Gas Evaluation
We have provided evaluations of alternate uses of landfill gas, such as for power generation or conversion to pipeline gas.
Landfill Gas Facilities Detailed Design
For a utility client, we developed the detailed design and arrangement of balance-of-plant (ex-gas turbine) for a series of landfill gas facilities, including landfill gas (LFG) piping, conditioning and compression, and all services and structures. The power block for these projects consists of a single 5-MW solar gas turbine designed specifically for LFG applications.
Repowering for Burning Multiple Refuse Fuel Burning
Sargent & Lundy provided the engineering and design to support repowering of older three units for alternative fuel firing. The existing steam turbines remain intact, while the existing steam generators were retired, replaced with a single circulating fluidized steam generator capable of burning coal refuse, petroleum coke, wood refuse, and tire-derived fuel.
Site and Technology Screening for Firing Waste Wood & Coal
For a utility client, we conducted a siting and technology screening study for the use of wood waste. The screening study evaluated the best locations on the transmission system and identified the generation technology and capacity options to be used as the basis for the site evaluations and in developing the conceptual designs and cost estimates. Options centered on steam generating units capable of burning a mix of wood waste and Powder River Basin coal.