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Q1. In a regenerative steam power plant, the steam enters the turbine at a pressure of 50 bar and a temperature of 400°C, and leaves at a pressure of 0.08 bar with a dryness fraction of 0.9. Dry saturated steam is bled from the turbine at a pressure of 2 bar, and supplied to a direct mixing feed heater. The feed water leaves the heater at the saturation temperature of the bled steam. The mass of bled steam is 14.7% of the boiler supply.

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

(b) Determine EACH of the following:

(i) The isentropic efficiency of the turbine

(ii) The enthalpy of the condensate leaving the condenser

(iii) The thermal efficiency of the cycle.

Note: Work input to feed pumps may be disregarded.