Power Plant

please answer Exercise Number 2

Exercises: 1) A Steam is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 8.0 MPa and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 100 MW. Determine for the cycle (a) the thermal efficiency, (b) the back work ratio, (c) the mass flow rate of the steam, (d) the rate of heat addition in the boiler, in MW. (e) the rate of heat rejection in the condensing steam, in MW, (f) the mass flow rate of the condenser cooling water, if cooling water enters the condenser at 15C and exits at 35C. 2) Reconsider the vapor power cycle of Exercise 1 but include in the analysis that the turbine and the pump each have an isentropic efficiency of 85%. Determine for the modified cycle (a) the thermal efficiency, (b) the mass flow rate of steam, for a net power output of 100 MW, (c) the rate of heat addition in the boiler, in MW. (d) the rate of heat rejection in the condensing steam, in MW (e) the mass flow rate of the condenser cooling water, if cooling water enters the condenser at 15C and exits as 35C. Discuss the effects of irreversibilities on the vapor cycle within the turbine and pump. 9