Chapter 8, Problem 8.29CU

(b) Consider a steam power plant operating on an ideal Rankine cycle. This steam power cycle can achieve a cycle thermal efficiency of at least 25 percent. i) Decide about the systems' components, working temperature and pressure of this power plant. ii) Illustrate system schematic and T-s diagrams with completely labelled on the systems' components, working temperature and pressure. iii) Evaluate the compatibility between proposed parameters and thermal efficiency of the plant.

Submit correct and complete solutions. give propriate Explanation. Provide step-by-step detailed explanations.

a.Draw a schematic diagram with labels of states of a substance; b.For uniformity purposes, assign STATE 1 at the inlet of a high-pressure turbine. The states must be arranged in a chronological order; c.Plot each cycle in a t-s diagram with the states consistent to the states assignment in the schematic diagram; d.Show a detailed solution.       Consider a regenerative vapor power cycle with a single open feedwater heater. Steam enters the first turbine stage at 12MPa, 500 0C, and expands to 0.3MPa where some steam is extracted and fed to the feedwater heater. The remainder expands through the second-stage turbine and exits at the condenser pressure of 0.01 MPa. Saturated liquid at 0.3 MPa leaves the open feedwater heater. If the net power output of the cycle is 100 MW,and the turbine stages and pumps are isentropic, determine (a) the thermal efficiency, and(b) the mass flow rate of steam entering the first turbine, in kg/h.