ISRO Mechanical & Aerospace 2017-2 - Question 2

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Topic: Power Plant Engineering

In a gas turbine power plant, reheating of gases between high pressure and low pressure turbine stages will

  • A. Improve turbine output
  • B. Decrease turbine output
  • C. Increase compressor work
  • D. Decrease compressor work

Answer: A. Improve turbine output

Explanation: Following are the effects of reheating in a gas turbine power plant: 1. No change in compressor work. 2. Turbine work output increases. 3. Net work output increases. 4. Both mean temperature of heat addition and heat rejection increases. 5. Both heat supplied and heat rejected increases. 6. Efficiency decreases. 7. Scope of regeneration increases.

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