Taurus Group 60 - Manual (Page 12)

Turbomachinery Package Specification Taurus 60 Compressor Set and Mechanical Drive
3.1.1 Principles of Operation
During the typical combustion process (Figure 4), air is drawn into the gas turbine air inlet
and is compressed by the multi-stage, axial-flow engine compressor. The compressed air
is directed into the annular combustion chamber at a steady flow. Fuel is injected and
mixed with the compressed air and ignited during the start cycle. Continuous combustion
will be maintained as long as there is an adequate flow of pressurized air and fuel. Hot-
pressurized gas from the combustor expands through and drives the turbine, dropping in
pressure and temperature as it exits the turbine. This combustion cycle converts the
energy in the fuel into kinetic rotating power at the turbine output shaft.
For combustion, the gas turbine requires approximately one-fourth of the total air it
compresses. The excess air is mixed with the combustion products to reduce the gas
temperature at the turbine first stage-inlet. The cooling air also keeps metal temperatures
in the combustor and turbine assembly relatively low to ensure a long service life.
Figure 4. Typical Combustion Process
3.1.2 SoLoNOx Combustion System (Optional)
In addition to the conventional combustion system, Solar’s proprietary SoLoNOx dry
emissions system reduces pollution by limiting the formation of nitrous oxides (NOx),
carbon monoxide (CO), and unburned hydrocarbons (UHC). This system uses lean
premix combustion to lower the maximum flame temperature and reduce pollution
formation. Solar’s engineering staff works with customer’s to meet local permitting
emission requirements.
Table 2. Taurus 60 CSMD Gas Turbine Specifications
Compressor
Type Axial Flow
Number of Stages 12
12.2:1 (Compressor Set)
Compression Ratio
11.5:1 (Mechanical Drive)
21.3 kg/sec (47.0 lb/sec) (Compressor Set)
Flow (Nominal)
21.1 kg/sec (46.5 lb/sec) (Mechanical Drive)
Combustion Chamber
Type Annular
Ignition Torch
Number of Fuel Injectors
12
Gas Producer Turbine
Type Reaction
Number of Stages
2
Maximum Speed 15,000 rpm
© 2009 Solar Turbines Incorporated. All rights reserved. TPS60CSMD/309
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