System  Concept  Technology 
Studies  Development  Readiness Testing 
(Phase I)  (Phase II)  (Phase III) 

Turbine Full-Scale Testing/

Deploy
Manufacturers Performance Validation

Technology Base Research
Universities – Industry – National Labs

Utility-Scale ATS Benefits

The ATS Program is meeting established objectives, laying a foundation for future advances, and providing a timely response to the burgeoning demand for clean, efficient, and affordable power both here and abroad. ATS technology represents a major cost and performance enhancement over existing natural gas combined-cycle, which is considered today’s least-cost, environmentally superior electric power generation option. Moreover, ATS is intended to evolve to full fuel flexibility, allowing use of gas derived from coal, petroleum coke, biomass, and wastes. This compatibility improves the performance of advanced solid fuel technologies such as integrated gasification combined-cycle (IGCC) and second generation pressurized fluidized-bed. In summary, the ATS Program does the following:
.
 Provides a timely, environmentally sound, and
affordable response to the nation’s energy
needs, which is requisite to sustaining economic
growth and maintaining competitiveness in the
world market

.
 Enhances the nation’s energy security by using
natural gas resources in a highly efficient
manner

.
 Firmly establishes the United States as the world
leader in gas turbine technology; provides the
underlying science to maintain that leadership;
and positions the United States to capture a large
portion of a burgeoning world energy market,
worth billions of dollars in sales and hundreds
of thousands of jobs

.
 Provides a cost-effective means to address both
national and global environmental concerns by
reducing carbon dioxide emissions 50 percent
relative to existing power plants, and providing
nearly pollution-free performance

.
 Allows significant capacity additions at existing
power plant sites by virtue of its highly compact
configuration, which precludes the need for
additional plant siting and transmission line
installations

.
 Enhances the cost and performance of advanced
solid fuel-based technologies such as integrated
gasification combined-cycle and pressurized
fluidized-bed combustion for markets lacking
gas reserves

Gas Turbine Systems

A gas turbine is a heat engine that uses a high-temperature, high-pressure gas as the working fluid. Combustion of a fuel in air is usu-ally used to produce the needed tem-peratures and pressures in the turbine, which is why gas turbines are often referred to as “combus-tion” turbines. To capture the en-ergy, the working fluid is directed tangentially by vanes at the base of combustor nozzles to impinge upon specially designed airfoils (turbine blades).  The turbine blades, through their curved shapes, redirect the gas stream, which absorbs the tan-gential momentum of the gas and produces the power.  A series of tur-bine blade rows, or stages, are at-tached to a rotor/shaft assembly. The shaft rotation drives an electric generator and a compressor for the air used in the gas turbine combus-tor. Many turbines also use a heat exchanger called a recouperator to impart turbine exhaust heat into the combustor’s air/fuel mixture.
　
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