Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Net work output and work done by turbine
Net work output and heat supplied
Actual heat drop and isentropic heat drop
Net work output and isentropic heat drop

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Compressors, Gas Turbines and Jet Engines
Intercooling in gas turbines

Increases net output but decreases thermal efficiency
Increases net output and thermal efficiency both
Decreases net output and thermal efficiency both
Decreases net output but increases thermal efficiency

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