Modify the coal plant Rankine cycle described in §13.3.5 by including a regeneration cycle similar to the one shown in Figure 13.16(b)

A fraction f of the steam is removed from the turbine and returned back to a second pump at a temperature T_r = 130 ^◦C. Compute the fraction f needed to heat the water from the first pump to 130 ^◦C, and compute the increase in efficiency of the resulting cycle above that computed in the text. s₅ = s₃ in Figure 13.16(b).

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800 700 p. 600 500 Tregen 6. 400 1-f 300 т. p- 4 (b) entropy [kJ/kg K] temperature [K] 2.