Question:-
The temperature-entropy diagram for a steam turbine power plant, operating on the Rankine cycle with reheat and regenerative feed heating is shown in the given figure. If m denotes the fraction of steam bled for feed heating, the work developed in the turbine per kg steam entering the turbine at state 5 is

Option (A)
(h5 – h4) + (1 – m) (h3 – h1)
Option (B)
(h5 – h4) + (h3 – h2) + (1 – m) (h2 – h1)
Option(C)
2h5 – h4 – h1 + (1 – m) (h2 – h1)
Option(D)
(h5 – h4) + (1 – m) (h3 – h2)
Correct Option:
(B)
Question Solution:

Work developed in the turbine
= (h5 - h4) + (h3 - h2) + (1-m)(h2 - h1)
question-answer-faq-9593