Question

Reheating in Brayton cycle:

• A. Decreases work output
• B. Reduces temperature
• C. Increases work output
• D. Reduces efficiency

Hint:

Reheating is commonly used in steam power cycles to improve work output by raising the temperature of the working fluid after partial expansion. This increases the efficiency of the cycle.

Answer 1

The Correct Option is C

In the Brayton cycle, reheating is employed to increase the temperature of the working fluid after it has expanded, which enhances the work output. This process helps to reduce the moisture content in the steam and increases the efficiency of the cycle. Reheating does not reduce the temperature or decrease work output. It is mainly used to boost the cycle's performance.
- Decreases work output is incorrect because reheating actually increases work output by increasing the energy available for expansion.
- Reduces temperature is incorrect because reheating raises the temperature of the working fluid.
- Reduces efficiency is incorrect because reheating improves the cycle's efficiency by reducing moisture in the exhaust.
Therefore, the correct answer is (3), Increases work output.