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In a Rankine cycle the steam enters at 200 bar and 400°C to the turbine, condenser pressure is 10 kPa. Power output of cycle is 100 MW. Cooling water is used to cool the steam in condenser.When pump work is not neglected and cooling water enters at 30° C and leaves at 50°C. The mass flow rate of cooling water required is _____kg/s. Data : at 200 bar, 400°C h=3400kJ/kg,s=3.35kJ/kgKat 10 kPahf=191.83kJ/kg,hg=2584.8kJ/kgsδ=8.1511kJ/kgK,sfg=7.5018kf/kgK,vf=0.001m/kgSpecific heat capacity for cooling water =4.18 kJ/kgk 1588.27 |
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Answer» In a Rankine cycle the steam enters at 200 bar and 400°C to the turbine, condenser pressure is 10 kPa. Power output of cycle is 100 MW. Cooling water is used to cool the steam in condenser.When pump work is not neglected and cooling water enters at 30° C and leaves at 50°C. The mass flow rate of cooling water required is _____kg/s. Data : at 200 bar, 400°C h=3400kJ/kg,s=3.35kJ/kgK at 10 kPa hf=191.83kJ/kg,hg=2584.8kJ/kg sδ=8.1511kJ/kgK,sfg=7.5018kf/kgK,vf=0.001m/kg Specific heat capacity for cooling water =4.18 kJ/kgk
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