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Consider the following statements:
The efficiency of the vapour power Rankine 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 reject
Q. Which of these statements is/are correct?
  • a)
    2 and 3
  • b)
    1 only
  • c)
    1 and 2
  • d)
    1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Consider the following statements:The efficiency of the vapour power R...

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.
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Most Upvoted Answer
Consider the following statements:The efficiency of the vapour power R...
The efficiency of the vapour power Rankine cycle can be increased by:

Increasing the temperature of the working fluid at which heat is added:
- Increasing the temperature of the working fluid at which heat is added will result in a higher thermal efficiency of the Rankine cycle. This is because a higher temperature difference between the heat source and the working fluid leads to a higher thermal efficiency.

Increasing the pressure of the working fluid at which heat is added:
- Increasing the pressure of the working fluid at which heat is added also improves the efficiency of the Rankine cycle. This is because higher pressures result in a higher average temperature during heat addition, leading to increased efficiency.

Decreasing the temperature of the working fluid at which heat is rejected:
- Lowering the temperature of the working fluid at which heat is rejected helps to increase the efficiency of the Rankine cycle. This is because a lower temperature difference between the heat sink and the working fluid results in less wasted heat energy.

Therefore, all three statements are correct in terms of increasing the efficiency of the vapour power Rankine cycle. Increasing the temperature and pressure at which heat is added, along with decreasing the temperature at which heat is rejected, are effective ways to improve the overall efficiency of the cycle.
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Consider the following statements:The efficiency of the vapour power Rankine cycle can increased by1. Increasing the temperature of the working fluid at which heat is added2. Increasing the pressure of the working fluid at which heat is added3. Decreasing the temperature of the working fluid at which heat is rejectQ.Which of these statements is/are correct?a)2 and 3b)1 onlyc)1 and 2d)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?
Question Description
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