Give the temperature of the steam at the inlet (T2) and the exit (T3) of the boiler in a steam power plant the rate of heat transfer into the boiler is best estimated byQuestion 2Select one:a.Qin = Cp(T3-T2)b.Qin = Cv(T3-T2)c.Qin = U3-U2d.Qin = H3-H2

A steam turbine operates under steady flow conditions, receiving steamat 1.2MPa and 1880C, and enthalpy 2785kJ/kg, velocity 33.3m/s andelevation 3m. Steam leaves the turbine at 20 kPa, and 2512kJ/kg, velocity100m/s and elevation zero m. Heat is lost to surroundings at the rate of0.29kJ/s. If the rate of steam flow through the turbine is 0.42kg/s, what isthe power output of the turbine?

A steam turbine operating under steady flow, conditions of steam at inletof steam turbine: p=13.8 bar, v=0.143 m3/kg, u=2590 kJ/kg, C= 30m/s. Thestate of the steam at the outlet leaving the turbine: p=0.35bar, v=4.37 m3/kg,u=2360 kJ/kg, C=90m/s. Heat is rejected to surroundings at the rate of 0.25kW and rate of steam flow through turbine is 0.38kg/s. Calculate powerdeveloped by the steam turbine.

For the process in Q2. Determine:a) The heat input into the boiler (in MW).b) The heat out for the condenser (in MW)c) The thermal efficiency of the cycle (in %).

Q2. Consider an ideal Rankine cycle where the boiler operates at 12.5 MPa and thecondenser operates at 40 kPa. The steam is superheated after the boiler to 600 oC. Theturbine produces 100 MW of shaft work. Determine:a) The mass flow rate of water through the turbine (in kg/s).b) The work required for the pump.Q3. For the process in Q2. Determine:a) The heat input into the boiler (in MW).b) The heat out for the condenser (in MW)c) The thermal efficiency of the cycle (in %).

A boiler delivers 5400kg of steam per hour at a pressure of 800kN/m2 and with a drynessfraction of 0.98. The feedwater to the boiler is at a temperature of 42oC. The fuel usedfor the boiler has a calorific value of 31000kJ/kg.(i) Determine the heat energy absorbed by the steam per hour in the boiler