application 5

The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the engine compressor without any work or heat interactions. Calculate the velocity at the exit of a diffuser when air at 100 kPa and 30°C enters it with a velocity of 350 m/s and the exit state is 200 kPa and 90°C [Ans. 40.7 m/s].

Two hundred kg/min of steam enters a steam turbine at 350ºC and 100 bar through a 8.5-cm diameter line and exits at 75ºC and 6.5 bar through a 4.5-cm line. The exiting stream may be vapor, liquid, or "wet steam", a mist composed of saturated water vapor and entrained liquid droplets.How much power is transferred from the turbine to the steam? The answer is signed (i.e. can be positive or negative).Neglect ΔEp but not ΔEk.

Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s and leaves at 375°C and 400 kPa while losing heat at a rate of 26.5 kW. For an inlet area of 800 cm2, determine the velocity and the volume flow rate of the steam at the nozzle exit. Use steam tables.   At the left side of the lines, 800 kilo Pascal, 400 degree Centigrade, 10 meters per second are shown. At the right side of the lines, 400 kilo Pascal, 375 degree Centigrade are shown.   The velocity of the steam at the nozzle exit is  m/s.   The volume flow rate of the steam at the nozzle exit is  m3/s.

Helium steadily enters a pipe with a mass flow rate of 8 kg/s at 427°C and 100 kPa and leaves the pipe at 27°C. The pressure during the process is constant at 100 kPa. (a) Determine the heat transfer for the process, in kW. (b) Determine the volume flow rate of the helium at the pipe exit, in m3 /s.

solle не An adiabatic air compressor compresses 15 L/s of air at 1 bar and 30 °C to 8 bar and 350 °C. A heat loss of 10 KJ/Kg is estimated through the wall of the compressor. Determine the work required by the compressor in kJ/kg and the power required to drive the air compressor in kW.

Argon (100 kPa and 10 deg C) enters a compressor with a mass flowrate of 0.19 kg/s. It exits at 600 kPa and 130 deg C. The compressor has a specific heat loss of 16 kJ/kg. What is the power (kW) required for the compressor? Report your answer to 2 decimal places.

Consider an air conditioning system which requires periodic air renewal. Therefore, fresh air must be introduced by mixing outside air (state 1) and return air from the conditioned room (state 2). The figure shows the principle of operation and data on the air quantities and the evaporator outlet (state 4). Determine the capacity (Q) of the evaporator coil in kJ/kg of dry air.

Steam expands in a turbine steadily at a mass flowrate of m˙ = 42 Mg/h, entering at 8 MPa, 500°C and 81 m/s, and leaving at 40 kPa, 79% quality and 53 m/s. If the power generated by the turbine is 7.9 MW and the surrounding has a constant temperature of 22 °C A)Determine the change rate in the kinetic energy (in kW) of the system B)Determine the turbine inlet area (in cm2). C)Determine the magnitude of the heat loss rate (in MW) to the surroundings. D)Determine the rate of entropy generation, S˙gen

Subcooled water at 5°C is pressurised to 350 kPa with no increase in temperature, and then passed through a heat exchanger where it is heated until it reaches saturated liquid-vapour state at a quality of 0.63. If the water absorbs 499 kW of heat from the heat exchanger to reach this state, calculate how many kilogrammes of water flow through the pipe in an hour. Give your answer to one decimal place. Please provide correct solution Don't copypaste in chegg

1. Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 300°C and 200 kPa while losing heat at a rate of 25 kW. For an inlet area of 800 cm?, determine the velocity and the volume flow rate of the steam at the nozzle exit. Determine the following: a. Velocity at the exit (m/s) b. Volume flow rate (m³/s) From steam table: h,=3267.7 kJ/kg h,=3072.1 kJ/kg 400°C 300°C 800 kPa Steam v,=0.39429 m /kg 200 kPa v,=1.3163 m /kg 10 m/s