Condition to improve efficiency of Rankine cycle with reheat - Thermodynamics

Q.  Considering the below T-s diagram of the Rankine cycle with reheat, which condition can improve the efficiency of the cycle slightly?

- Published on 20 Aug 15
T-s-Diagram-of-Rankine-Cycle-with-Reheat-to-improve-efficiency.png


a. the mean temperature of heat addition in process (1 – 2) should be higher than the mean temperature of heat addition in process (2 ′ – 2 ″)
b. the mean temperature of heat addition in process (2 ′ – 2 ″) should be higher than the mean temperature of heat addition in process (1 – 2)
c. the mean temperature of heat addition in process (2 ′ – 2 ″) should be equal to the mean temperature of heat addition in process (1 – 2)
d. none of the above

ANSWER: the mean temperature of heat addition in process (2 ′ – 2 ″) should be higher than the mean temperature of heat addition in process (1 – 2)

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