In a steam power plant, the value of the reheat factor is of the order of:

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SSC JE EE Previous Paper 11 (Held on: 24 March 2021 Morning)
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  1. 0.5 to 1.0
  2. 1.6 to 2.0
  3. 1.1 to 1.5
  4. 2.1 to 3.0

Answer (Detailed Solution Below)

Option 3 : 1.1 to 1.5
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Explanation:

Reheat factor:

  • It is defined as the ratio of cumulative heat drop to the adiabatic heat drop in all stages of the turbine. 
  • The value of reheat factor depends on the type and efficiency of the turbine. 
  • The value of the reheat factor is of the order of 1.1 to 1.5

Reheat factor (R.F.) = \(\frac{{Cumulative\,\,heat\,\,drop\,\,(isentropic)}}{{Isentropic\,\,heat\,\,drop\,\,(overall)}}\)

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