Q: On a T-s diagram, does the actual exit state
On a T-s diagram, does the actual exit state (state 2) of an adiabatic turbine have to be on the right-hand side of the isentropic exit state (state 2s)? Why?
See AnswerQ: A piston–cylinder device contains nitrogen gas. During a reversible
A piston–cylinder device contains nitrogen gas. During a reversible, adiabatic process, the entropy of the nitrogen will (never, sometimes, always) increase.
See AnswerQ: The lower half of a 6-m-high cylindrical container
The lower half of a 6-m-high cylindrical container is filled with water ( Ï = 1000 kg/m3) and the upper half with oil that has a specific gravity of 0.85. Determine the pressure difference...
See AnswerQ: Argon gas enters an adiabatic turbine at 800°C and 1
Argon gas enters an adiabatic turbine at 800°C and 1.5 MPa at a rate of 80 kg/min and exhausts at 200 kPa. If the power output of the turbine is 370 kW, determine the isentropic efficiency of the turb...
See AnswerQ: Steam at 100 psia and 650°F is expanded adiabatically in
Steam at 100 psia and 650°F is expanded adiabatically in a closed system to 10 psia. Determine the work produced, in Btu/lbm, and the final temperature of steam for an isentropic expansion efficiency...
See AnswerQ: Combustion gases enter an adiabatic gas turbine at 1540°F and
Combustion gases enter an adiabatic gas turbine at 1540°F and 120 psia and leave at 60 psia with a low velocity. Treating the combustion gases as air and assuming an isentropic efficiency of 82 percen...
See AnswerQ: Steam at 4 MPa and 350°C is expanded in an
Steam at 4 MPa and 350°C is expanded in an adiabatic turbine to 120 kPa. What is the isentropic efficiency of this turbine if the steam is exhausted as a saturated vapor?
See AnswerQ: Steam at 3 MPa and 400°C is expanded to 30
Steam at 3 MPa and 400°C is expanded to 30 kPa in an adiabatic turbine with an isentropic efficiency of 92 percent. Determine the power produced by this turbine, in kW, when the mass flow rate is 2 kg...
See AnswerQ: Repeat Prob. 8–114 for a turbine efficiency of 85
Repeat Prob. 8–114 for a turbine efficiency of 85 percent. Data from Prob. 8-114: Steam at 3 MPa and 400°C is expanded to 30 kPa in an adiabatic turbine with an isentropic efficiency of 92 percent. D...
See AnswerQ: Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100
Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3/min and exits at 1-MPa pressure. If the isentropic efficiency of the compressor is 87 percent, determi...
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