Question:-
Consider the following statements:
The efficiency of the vapour power Rankin cycle can increased by
1. Increasing the temperature of the working fluid at which heat is added
2. Increasing the pressure of the working fluid at which heat is added
3. Decreasing the temperature of the working fluid at which heat is rejected
Which of these statements is/are correct ?
Option (A)
2 and 3
Option (B)
1 alone
Option(C)
1 and 2
Option(D)
1 ,2 and 3
Correct Option:
(D)
Question Solution:
hcarnot = 1 – (T2/T1)
Where T2 is the temperature of the rejection and T1 is the temperature of heat added Efficiency increases when T2 decreases and T1 increases
An increases in the pressure of working fluid increases the mean temperature of heat addition and hence increases the cycle efficiency
question-answer-faq-6108