POWER PLANT OPTIMIZATION
1 Test Results
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efficient, increase its generation capability,
and to increase its operational flexibility.
There is technology capable of adding
up to 10-20 percent more power to the
grid by injecting high pressure and temperature dry air into the combustion turbine (CT) compressor discharge. The result is virtually instantaneous production
of the fast response power needs of the
modern grid while at the same time increasing unit efficiency and therefore
lower cost of service to the ratepayers.
The technology is configured with a
multi-stage intercooled centrifugal com-
pressor driven by a very efficient turbo-
charged natural gas- or diesel-fired internal
combustion engine that compresses air to
the appropriate psi for the specific CT ap-
plication. The system can be integrated to
any new or existing combustion turbine.
The air then enters a recuperator that recov-
ers heat from the engine exhaust in order
to heat the clean, dry compressed air to
about the appropriate temperature before
entering the CT compressor discharge sec-
tion. The added air then flows into the
combustor where fuel is added and addi-
tional power is produced in the turbine
section of the CT.
For a combined cycle plant, the additional mass flow entering the heat recovery
steam generator increases steam production
and therefore additional power is also produced in the steam turbine. The net result
is an increase in power generation and because the engine-compressor is more efficient than the CT the net combined cycle
heat rate is also improved.
The CT has unused power generation
capability when ambient temperatures
or elevations rise and is capable of producing more power but is unable to at
elevated temperatures or when installed
at elevated sites.
The CT compresses air at constant volume so when ambient temperatures rise,
less air is compressed and therefore the CT
produces less power. The CT power output
is proportional to air mass flow through the
CT. Turbophase is designed to produce a
constant incremental mass flow of air so
This Turbophase system consists of four main components,
from back to front: turbocharged natural gas-fired reciprocating
engine, gearbox, and multi-stage centrifugal compressor. A single air pipe is run from the outlet of the compressor to the CT.
Multiple modules may also interconnected in parallel to provide
additional CT power production. Photo courtesy: Powerphase