Nexterra's system provided heat and power to the
University of South Carolina in Columbia, South Carolina.
Renewable Heat and Power at USC
In 2007, Nexterra provided a gasification system for a cogeneration plant at USC. Nexterra's system passed its performance warranty tests, and at peak capacity the plant generated 60,000 lbs/hr of steam used to heat the campus, as well as 1.38 MW of electricity. Unfortunately some of the plant equipment which was provided by vendors other than Nexterra experienced repeated failures. As a result of these failures, the plant operated infrequently between 2007 and 2010. The future of the plant is currently under review by USC and Johnson Controls.
JCI / USC Gasification System
Johnson Controls Inc. for University
of South Carolina
Columbia, South Carolina
Cogeneration Plant to provide heat
and power for the university
Nexterra Scope of Work:
Supply of gasification system only
Energy produced from renewable sources
Significant greenhouse gas reduction
Ultra low air emissions
Start-up: Q4 2007
Capacity: 60,000 lbs/hr high pressure steam for district heating and 1.38 MW of electricity
Fuel: Locally sourced waste wood
Fuel moisture content:
25% to 55%
3 gasifiers convert woody biomass to combustible syngas.
Clean syngas is burned in the oxidizer.
The hot flue gas is directed through heat recovery steam generator to produce steam.
The steam is then distributed to an extraction/condensing steam turbine.
Steam sent to a back pressure turbine to produce electricity.
Turbine exhaust steam is distributed to campus heating system.