A well-insulated turbine operating at steady state develops 29.7 MW of power for a steam flowrate of 45 kg/s. The steam enters at 25 bar with a velocity of 48 m/s and exits as a saturated vapor at 0.06 kPa with a velocity of 139 m/s. Neglecting potential energy effects, determine the inlet enthalpy in kJ/kg to the tenths place.

Carbon dioxide gas is compressed at steady state from a pressure of 20 Ibf/in? and a temperature of 32°F to a pressure of 50 Ibf/in? and a temperature of 120°F. The gas enters the compressor with a velocity of 30 ft/s and exits with a velocity of 80 ft/s. The mass flow rate is 2500 Ib/hr. The magnitude of the heat transfer rate from the compressor to its surroundings is 5% of the compressor power input. Use the ideal gas model with cp = 0.21 Btu/lb.°R and neglect potential energy effects. Determine the flow area at the inlet, in ft2, and the power required by the compressor to work, in horsepower.

A steam turbine operates with an inlet condition of 30 bar, 400 °C, 160 m/s and an outlet state of a saturated vapour at 0.7 bar with a velocity of 100 m/s. The mass flow rate is 1200 kg/min and the power output is 10800 kW. Present the process on the T-v diagram. Determine the magnitude and direction of the heat-transfer rate in kJ/min if the potential energy change in negligible.

Refrigerant 134a enters an insulated diffuser as a saturated vapor at 120°F with a velocity of 1400 ft/s. The inlet area is 1.4 in?. At the exit, the pressure is 400 Ibf/in2 and the velocity is negligible. The diffuser operates at steady state and potential energy effects can be neglected. Determine the mass flow rate, in Ib/s, and the exit temperature, in °F.

Refrigerant 134a enters an insulated diffuser as a saturated vapor at 60°F with a velocity of 1200 ft/s. The inlet area is 1.4 in?. At the exit, the pressure is 400 lby/in? and the velocity is negligible. The diffuser operates at steady state and potential energy effects can be neglected. Determine the mass flow rate, in Ib/s, and the exit temperature, in °F. Step 1 Determine the mass flow rate, in Ib/s. i Ib/s.

50 kg/min of air enters the control volume in a steady flow system at 2 bar and 100ºC and at an elevation of 100 m above the datum. The same mass leaves the control volume at 150 m elevation with a pressure of 10 bar and temperature of 300ºC. The entrance velocity is 2400 m/min and the exit velocity is 1200 m/min. During the process 50000 kJ/hr of heat is transferred to the control volume and the rise in enthalpy is 8 kJ/kg. Calculate the power developed.

Steam at 50 bar and 600°C enters an adiabatic turbine and leaves as saturated vapor at 1.5 bar. The elevation of the entrance is 3 m above the exit. The velocities at the entrance and exit are 3 m/s and 0.3 m/s, respectively. a. What is the specific power produced in the turbine? Answer: 972.96 kJ/kg b. How much do potential and kinetic energies contribute to this power? Answers: Kinetic Energy Contribution = 4.6 x 104% Potential Energy Contribution = 2.98 x 105%

Refrigerant 22 flows through a horizontal tube having an inside diameter of 4 cm. Therefrigerant flows at steady state and at the entrance to the tube it has with a quality of 0.3,temperature of 28°C, and velocity of 8 m/s. The refrigerant exits the tube as a saturatedliquid at 14 bar.Question:Determine:(a) the mass flow rate of the refrigerant, in kg/s.(b) the velocity of the refrigerant at the exit, in m/s.(c) the rate of heat transfer, in kW, and its associated direction with respect to therefrigerant

100% 1. Steam enters an insulated turbine at a pressure of 1 MPa and temperature 200°C, and exits at 40°C with a quality of 83%. Determine: a. Power developed (kl/kg) b. Specific entropy change (kJ/kg K)

Nitrogen, modeled as an ideal gas, flows at a rate of 3 kg/s through a well-insulated horizontal nozzle operating at steady state. The nitrogen enters the nozzle with a velocity of 20 m/s at 400 K, 400 kPa and exits the nozzle at 100 kPa.To achieve an exit velocity of 500 m/s, determine:(a) the exit temperature, in K.(b) the exit area, in m2.