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GATE 2016 ME (ME1) – Question 29

Thermal Engineering Applications · Power Engineering: vapour and gas power cycles, regeneration and reheat · 1 mark · Multiple choice

The INCORRECT statement about regeneration in vapor power cycle is that

  1. it increases the irreversibility by adding the liquid with higher energy content to the steam generator
  2. heat is exchanged between the expanding fluid in the turbine and the compressed fluid before heat addition
  3. the principle is similar to the principle of Stirling gas cycle
  4. it is practically implemented by providing feed water heaters

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Show answer and explanation

Correct answer: (A) it increases the irreversibility by adding the liquid with higher energy content to the steam generator

Explanation

Regeneration heats compressed feedwater using energy extracted from the expanding steam, raising the mean temperature of external heat addition. It reduces the temperature mismatch associated with adding heat to cold feedwater, rather than inherently increasing that irreversibility as A claims. Thus **A** is incorrect. Feedwater heaters implement the process.