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Design
Criteria for Gas Turbine Exhaust Expansion Joint
Satisfactory
life in both utility & non-utility generating service
i.e.
Peaking Duty @ 1460 starts/year, 32 years economic life,
47,000 + Cycles
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Support
Frame life not less than 32 years with minimum maintenance
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Fabric
Component repair/replacement not less than major inspection
interval (combustion/8000 hrs, hot gas path/24000 hrs,
major/48000 hrs or 6 years)
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High
Reliability - no forced outages
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Minimum
force or moment on gas turbine
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Convenient
installation to minimize time & handling required
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Convenient
interface with gas turbine
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Convenient
interface with silencer, damper, HRSG or OTSG, duct, stack
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Ability
to drain liquid fuel from ignition failure
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Ability
to drain water & water detergent from off-line compressor
wash
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Can
be Retrofit to existing field units
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Economic
cost based on the above
32 years Economic
cost based on:
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Provide
objective thermal stress & fatigue analysis of application
life expectancy prior to construction
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Steel
support frame design to survive a minimum of 47,000 thermal
cycles
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Fabric
flexible component life extends in relation to its lowest
possible surface temperature i.e. < 450 ºF / 250 ºC
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Reduce
incidences of repair or replacement of flexible fabric
components to suit scheduled inspection intervals to minimize
cost
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