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A thermal power plant operates on a regenerative cycle with a single open feedwater heater, as shown in the figure. For the state points shown, the specific enthalpies are: h1 = 2800 kJ/kg and h2 = 200 kJ/kg. The bleed to the feedwater heater is 20% of the boiler steam generation rate. The specific enthalpy at state 3 is
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- 720 kJ/kg
- 2280 kJ/kg
- 1500 kJ/kg
- 3000 kJ/kg
Correct Option: A
h3 = 0.2h1 + h2 × 0.8
= 560 + 160 = 720 kJ/kg
