A generating station is to give a power output of 200 MW. The superheat outlet pressure of the boiler is to be 170 bar and the temperature 600°C. After expansion through the 257 first-stage turbine to a pressure of 40 bar, 15% of the steam is extracted for feed heating. The remainder is reheated at 600°C and is then expanded through the second turbine stage to a condenser pressure of 0.035 bar. For preliminary calculations it is assumed that the actual cycle will have an efficiency ratio of 70% and that the generator mechanical and electrical efficiency is 95%. Calculate the maximum continuous rating of the boiler in kilograms per hour.

Oren is hired to design a massive 450 MW power plant for the city of Dubai. Oren decides that the optimal efficiency would be obtained if the pressure of saturdted vapár entering the turbine should be 10 MPa.and the presJure of saturated liquid exiting the condensor to be 0.005 MPa. Dubai is in the United Arab Emirates (UAE), where the water from the Persian Gulf is 4O °C and UAE environmental laws limit the exiting coa ling water to a maximum temperature of 45°C (to prevent damage to local fishing industry). For Oren's power plant, calculate : A.) heat input from the boiler (in MegaWatts) B.) thermal efficiency C.) mass flow rate of caoling water (in k/s)

DESIGN a steam power plant that produces 70 MW of power. The plant should have an open heater and a reheater operating simultaneously utilizing saturated steam from the partial expansion of steam in the turbine. The remaining steam is reheated to the inlet temperature of steam when it enters the turbine. Another open heater is used to bled saturated steam when the steam partially expands in the turbine after reheating, remaining steam is expanded to the exhaust pressure of the turbine. Other pertinent data are as follows: steam turbine: inlet pressure – 6.6 MPa; inlet temperature - 420 C; exhaust pressure – 10 KPa; stages of turbine – all pressure compounded stage; pumps – 90% efficient; shaftings – 75%% efficient; generator – 95% efficient. DRAW a line diagram of the design plant indicating the pressure, temperature and enthalpy at each point and specify the following: a) the mass requirement of the steam plant in kg/hr  b) the masses extracted in kg/hr and c) the plant thermal…