Question
In: Mechanical Engineering
Water vapor enters a subsonic diffuser at 0.5 bar, 175 °C, and 200 m/s. The diffuser...
Water vapor enters a subsonic diffuser at 0.5 bar,
175 °C, and 200 m/s. The diffuser inlet is 100 cm2. During passage
through the diffuser, the fluid velocity is reduced to 50 m/s,
pressure increases to 1.0 bar and heat transfer to the surroundings
is
0.5 kg/kJ. Determine
a) the final temperature,
b) the mass flow rate [kg/s] and
c) the outlet area [cm2]
Solutions
samet mamat answered 2 years agoRelated Solutions
Water vapor goes into a diffuser at steady state, with inlet conditions of 800 kPa, 200°C...
Water vapor goes into a diffuser at steady state, with inlet
conditions of 800 kPa, 200°C and velocity of 400 m/s. Superheated
steam leaves the outlet at 2 MPa and velocity of
2
100 m/s. The inlet area of the diffuser is 14 cm . The system loses
heat at the rate of 25 kJ/s
to the surroundings. Neglect changes in potential energy between
the inlet and outlet.
What is the mass flow rate of the water vapor, in kg/s?...
Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric...
Water vapor at 5 bar, 320°C enters a turbine operating at steady
state with a volumetric flow rate of 3 m3/s and expands
adiabatically to an exit state of 1 bar, 160°C. Kinetic and
potential energy effects are negligible.
Determine for the turbine:
(a) the power developed, in kW.
(b) the rate of entropy production, in kW/K.
(c) the percent isentropic turbine efficiency.
Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric...
Water vapor at 5 bar, 320°C enters a turbine operating at steady
state with a volumetric flow rate of 3 m3/s and expands
adiabatically to an exit state of 1 bar, 200°C. Kinetic and
potential energy effects are negligible. Determine for the turbine:
(a) the power developed, in kW. (b) the rate of entropy production,
in kW/K. (c) the percent isentropic turbine efficiency.
Water vapor enters a turbine operating at steady state at 480°C, 90 bar, with a velocity...
Water vapor enters a turbine operating at steady state at 480°C,
90 bar, with a velocity of 247 m/s, and expands adiabatically to
the exit, where it is saturated vapor at 12 bar, with a velocity of
113 m/s. The exit diameter is 0.22 m. Determine the power developed
by the turbine, in kW.
A current of 5.20 kg / s of water vapor at 40.0 bar and 320 °...
A current of 5.20 kg / s of water vapor at 40.0 bar and 320 ° C
is passed to an adiabatic turbine. The outlet pressure is 20.0 bar.
The isentropic efficiency of the turbine is 97.4%. What is the
work, in kW?
(Uses 3 significant figures)
Air as an ideal gas enters a diffuser operating at steady state at 5 bar, 340...
Air as an ideal gas enters a diffuser operating at steady state
at 5 bar, 340 K with a velocity of 512 m/s. The exit velocity is
110 m/s.
For adiabatic operation with no internal irreversibilities,
determine the exit temperature, in K, and the exit pressure, in
bar:
(a) for k = 1.4.
(b) using data from Table A-22.
Refrigerant 134a enters a well-insulated nozzle at 14 bar, 60°C, with a velocity of 37 m/s...
Refrigerant 134a enters a well-insulated nozzle at 14 bar, 60°C,
with a
velocity of 37 m/s and exits at 1.2 bar with a velocity of 460 m/s.
For steady-state
operation, and neglecting potential energy effects, determine the
exit
temperature, in °C.
4. 4MPa, 350°C of water vapor enters the insulating turbines, and is discharged into 50kPa of...
4. 4MPa, 350°C of water vapor enters the insulating turbines,
and is discharged into 50kPa of saturated vapor after expansion.
Ignore kinetic energy and position energy.
1) Draw a schematic diagram and a T-s diagram of the turbine.
2) Obtain turbine efficiency.
3) Obtain entropy change from turbine.
Pressurized water (pin= 10 bar, Tin= 110°C) enters the bottom of an L= 10-m-long vertical tube...
Pressurized water (pin= 10 bar, Tin= 110°C) enters the bottom of
an L= 10-m-long vertical tube of diameter D= 88 mm at a mass flow
rate of m˙= 1 kg/s. The tube is located inside a combustion
chamber, resulting in heat transfer to the tube. Superheated steam
exits the top of the tube at Pout= 7 bar, Tout= 600°C. Determine
the change in the rate at which the following quantities enter and
exit the tube: (1) the combined thermal and...
Saturated water vapor has a flow rate of 1.5 kg/s and a pressure of 0.51 bar....
Saturated water vapor has a flow rate of 1.5 kg/s and a pressure
of 0.51 bar. The vapor is to be completely condensed to saturated
liquid in the shell of a shell-and-tube heat
exchanger. In this case, the water vapor enters and the water exits
at the same temperature, which represents a case with infinitely
high m_dot * Cp for this condensing steam application. On the tube
side, city water is used as the cold fluid. The city water enters...
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