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The given figure shows an open-cycle gas turbine employing reheating, on T-S plane. Assuming that the specific heats are same for both air and gas, and neglecting the increase in mass flow due to addition of fuel, the efficiency is
  • a)
    33.3%    
  • b)
    64%
  • c)
    72.7%    
  • d)
    84%
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The given figure shows an open-cycle gas turbine employing reheating, ...
WT = Cp(T3 - T4) + Cp(T5 - T6)
= Cp(1000 - 600) + Cp(800 - 570)
= 400Cp + 230Cp = 630Cp
WC = Cp(T2 - T1)
= Cp(450 - 300) = 150Cp kJ/kg
Heat supplied
= Cp(T3 - T2) + Cp(T5 - T4)
= Cp(1000 - 450) + Cp(800 - 600)
= 550Cp + 200Cp = 750Cp kJ/kg
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The given figure shows an open-cycle gas turbine employing reheating, on T-S plane. Assuming that the specific heats are same for both air and gas, and neglecting the increase in mass flow due to addition of fuel, the efficiency isa)33.3% b)64%c)72.7% d)84%Correct answer is option 'B'. Can you explain this answer?
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