In an ideal brayton cycle, operating with air, the maximum and minimum cycle temperature are 298 k and 850 k respectively. for an optimum pressure ratio corresponding to maximum work output, the thermal efficiency (%) of cycle is, a) 41 b) 65 c) 51 d) 47

a)The efficiency =40.78 % or nearly 41%.

Explanation:

Given that

maximum temperature = 850 K

minimum temperature = 298 K

We know that condition for optimum pressure for maximum work out put is given as

So

We also know that efficiency of Brayton cycle given

So now by putting the values

So the efficiency =40.78 % or nearly 41%.

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