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Q4. A regenerative steam power cycle operates between pressures of 50 bar and 0.08 bar. The maximum temperature is 450°C. The optimum mass of steam is bled for feed heating at a pressure of 5 bar. A direct mixing feed heater is used.

(a) Sketch the T-s diagram for the cycle.

(b) Determine for the cycle EACH of the following:

(i) the specific work output (taking account of feed pump work);

(ii) the thermal efficiency.

Note: Expansion in the turbine and compression in the feed pumps are isentropic.