Q4. A regenerative steam plant is shown in Fig Q4.
The steam enters the turbine at a pressure and temperature of 60 bar and 500°C respectively and expands to a pressure of 0. 1 bar and a dryness fraction of 0. 91.
Steam is bled from the turbine at a pressure and temperature of 2 bar and 150°C respectively and supplied to a surface heat exchanger which drains back to the main condenser through a throttle.
The boiler feed water leaves the heater at a temperature of 115. 2°C and leaves the condenser with 5. 5 K subcooling.
The feed pump work cannot be ignored.
(a) Sketch the cycle on a Temperature-specific entropy diagram. (4)
(b) Calculate EACH of the following per kg of steam flow:
(i) the mass flow rate of bled steam; (4)
(ii) the network output; (4)
(iii) the heat removed in the condenser. (4)
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