Power Systems
The equation of area control error(ACE) is

 ACE = ΔPtie + b.Δf
 ACE = ΔPtie - 1/b.Δf
 ACE = ΔPtie - b.Δf
 ACE = ΔPtie +1/ b.Δf

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Power Systems
In Rankine cycle, the work output from a turbine is given by

  change in internal energy between inlet and outlet.
  change of enthalpy between inlet and outlet.
  change in temperature between inlet and outlet.
  change of entropy between inlet and outlet.

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