a) A steam turbine operating at steady state has water entering
at 3 MPa, 500 °C and 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
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.