Which one of the following statements is correct?
Option (A)
Reheat factor is zero if efficiency of the turbine is close to unity
Option (B)
Lower the efficiency, higher will be the reheat factor
Reheat factor is independent of steam conditions at turbine inlet
Availability of reheat is higher at lower pressure end
Correct Option:
Question Solution:
For multistage steam turbine:
Reheat factor = (Commulative enthalpy drop / isentropic enthalpy drop)
It depends on:
(i) Stage efficiency
(ii) Initial pressure and condition of steam
(iii) Final pressure
It increases with the increases in number of stages. The value of reheat factor varies from 1.02 to 1.06.