Question 13Gas Turbine - 1st Asst/Chief

70% to pass

In a regenerative or recuperative gas turbine cycle configuration, the heat of the turbine exhaust gas is used to do what?

AHeat the LP compressor discharge air before entering the HP compressor inlet.
BHeat the intake air to the compressor.
CHeat the combustor discharge gas before entering the turbine.
DHeat the compressor discharge air before it enters the combustor.
AI Explanation

The correct answer is D) Heat the compressor discharge air before it enters the combustor. In a regenerative or recuperative gas turbine cycle, the hot exhaust gas from the turbine is used to preheat the compressed air before it enters the combustor. This preheating of the compressor discharge air improves the overall efficiency of the gas turbine cycle by reducing the amount of fuel required to heat the air to the desired combustor inlet temperature. The other options are incorrect because: A) the LP compressor discharge air is not heated, B) the intake air to the compressor is not heated, and C) the combustor discharge gas is not heated before entering the turbine in a regenerative/recuperative cycle.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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