a) A steam turbine operating at a steady state has water entering at 3 MPa, 500 °C, and a velocity of 10 m/s.
The water exits at 800 kPa, 250 °C, and 100 m/s. 

Find the (a) specific work (kJ/kg) and the (b) required mass flow rate of steam (kg/s) if the turbine produces 5 MW of power and heat loss is 10 kJ/kg of mass passing through the system. (b) Draw a T-v diagram and show this process.

 b) Air expands steadily through an adiabatic turbine with a mass flow rate of 1.1 kg/s 10 atm, 1400 K to 1 atm, 500 K. Calculate the power (kW) developed by the turbine. (b) Draw a P-v diagram and show this process.

 c) A boiler is designed to convert water at 1 MPa, 50 oC to a superheated vapor at 1 MPa, 500 oC. 

(a) Determine the amount of heat transferred to the water if the mass flow rate of water is 2 kg/s. 

(b) Draw a T-v diagram and show this process.

 d) shown in the figure on the right, R134a enters a compressor as a saturated vapor at 100 kPa and exits at 0.9 MPa and 60 oC. If the compressor requires 5 kW of power to operate and heat is lost at a rate of 0.5 kW, determine the mass flow rate through the compressor.

 

Compressor