GATE 2020 ME (ME1) – Question 63
An ideal Rankine cycle operates between 30 bar and 0.04 bar. Turbine work output is 903 kJ/kg and pump input is 3 kJ/kg. Find specific steam consumption (kg/kWh), to two decimals.
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Correct answer: 3.98 to 4.02
Explanation
Net work is 903−3=900 kJ/kg. One kWh is 3600 kJ, so steam needed per net kWh is 3600/900=**4.00 kg/kWh**. Use net cycle work rather than turbine work alone.