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Q4. In a regenerative cycle, steam enters the turbine at a pressure and temperature of 40 bar and 350℃ respectively.

The steam expands isentropically to a dry saturated state, at which point some is bled off to a direct contact feed heater.

The remainder of the steam expands isentropically to the condenser pressure of 0.05 bar.

The feed water leaves the condenser with 6.2 K of subcooling and leaves the feed heater at the saturation temperature of the bled steam.

Feed pump work can be ignored.

(a) Sketch the cycle on a Temperature-specific entropy diagram. (2)

(b) Calculate EACH of the following:

(i) the mass flow rate of bled steam; (4)

(ii) the thermal efficiency of the cycle; (8)

(iii) the specific steam consumption. (2)