GATE Mechanical Engineering (ME) 2014 Shift 1 Solved Paper

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Question : 59 of 65
 
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An ideal reheat Rankine cycle operates between the pressure limits of 10 kPa and 8 MPa, with reheat being done at 4 MPa. The temperature of steam at the inlets of both turbines is 500°C and the enthalpy of steam is 3185 kJ/kg at the exit of the high-pressure turbine and 2247 kJ/kg at the exit of low-pressure turbine. The enthalpy of water at the exit from the pump is 191 kJ/kg. Use the following table for relevant data.
Superheated steam
temperature(°C)
Pressure
(MPa)
v
(m​3 /kg)
h
(kJ/kg)
s
(kJ/kg.K)
500
4
0.08644
3446
7.0922
500
8
0.04177
3399
6.7266
Disregarding the pump work, the cycle efficiency (in percentage) is _______
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