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HW_12 - ℃ steam entering at a rate of 15 kg/s Steam is...

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Homework Assignment 12 1. Air is 13 psia and 40 enters an adiabatic diffuser steadily with a velocity of 490 ft/s and leaves with a low velocity at a pressure of 14.5 psia. The exit area of the diffuser is 4 times the inlet area. Determine (a) the exit temperature (b) the exit velocity of the air 2. Argon gas enters an adiabatic turbine steadily at 900 kPa and 527 with a velocity of 100 m/s and leaves at 150 kPa with a velocity of 200 m/s. The inlet area of the turbine is 50 cm 2 . If the power output of the turbine is 250 kW, determine the exit temperature of the argon. 3. A portion of the steam passing through a steam turbine is sometimes removed for the purpose of feedwater heating as shown in following figure. Consider an adiabatic steam turbine with 15 MPa and 500
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Unformatted text preview: ℃ steam entering at a rate of 15 kg/s. Steam is bled from this turbine at 1.2 MPa and 250 ℃ with a mass flow rate of 2 kg/s. The remaining steam leaves the turbine at 400 kPa and 150 ℃ . Determine the power produced by this turbine. 4. Reconsider problem 3 using EES. Investigate how the net power development is affected as the bled mass flow rate is varied from 0 – 15 kg/s in 1 kg/s increments. 5. (a) Will the temperature of air rise as it is compressed by an adiabatic compressor? Why or why not? (b) An ideal gas expands in a throttling valve. Is this process isothermal? Why or why not? Due July 7, 2010 10:00 AM...
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