A Rankine cycle is executed with steam expanding initially from 20 MPaa and 100 deg SH. Condensation occurs at 399.967 millibars vac. All expansion and compression efficiencies are 90 %. Sketch the equipment layout and the TS diagram.
A Rankine cycle is executed with steam expanding initially from 20 MPaa and 100 deg SH. Condensation occurs at 399.967 millibars vac. All expansion and compression efficiencies are 90 %. Sketch the equipment layout and the TS diagram.
Answer the following for (m = 10 + (SN/5) ) kg/sec of steam circulated and fill up the blanks in the items below:
1. TS diagram with the cycle showing correct location of points with respect to saturation dome line with ne and nc = 90%.
2. Actual heat rate in KJ/KW-hr Answer: _______________________
3. Heat rejected at the condenser in KW (Ideal) Answer: _____________________
4. Ideal Rankine engine efficiency % Answer: _______________________
5. Ideal Rankine cycle efficiency % Answer: _______________________
6. Actual Rankine cycle efficiency using pump and turbine work % Answer: _______________ 7. Actual Rankine cycle efficiency using Qa and Qr values % Answer: _______________
8. If the generator efficiency = 95%, brake engine efficiency = 90% what is the combined work in KW? Answer: ____________________
9. If Cp water = 4.187 KJ/kg-K; cooling water enters the condenser at 12 deg C and leaves at 21 deg C, find amount of cooling water needed by the condenser in kg/sec. (IDEAL) Answer: _______________
10. Torque at the dynamometer in Mega Joules if the engine is running at 900 rpm. Answer:______________________
NOTE: SN = 18
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