Reheat factor definition in multi-stage turbines Select the correct definition of the reheat factor (RHF) in terms of heat drops. Choose the correct option.

ConceptReheat factor (RHF) accounts for the fact that in multi-stage turbines with reheating/expansion, the sum of actual stage heat drops is slightly greater than the overall isentropic heat drop between inlet and exhaust conditions.

DefinitionRHF = (Cumulative (actual or isentropic stage) heat drop) / (Overall isentropic heat drop)

ImplicationRHF is typically slightly above 1 for practical turbines.

Final AnswerRatio of cumulative heat drop to the isentropic heat drop