Question

With increase in pressure ratio in Brayton cycle the net work output

• A. increases
• B. decreases
• C. initially increases reaches to a maximum and then decreases
• D. initially decreases and then increases

Hint:

The net work output of a Brayton cycle is maximized at a specific pressure ratio beyond which the work output starts decreasing

Answer 1

The Correct Option is C

In a Brayton cycle with increasing pressure ratio the efficiency increases up to a point but eventually decreases after reaching an optimum pressure ratio due to the increasing compression work required Thus the work output initially increases and then decreases after a maximum value