Question
In: Physics
A steam turbine operates adiabatically with a steam rate of 25 kg/s. Due to frication and...
A steam turbine operates adiabatically with a steam rate of 25 kg/s. Due to frication and mechanical reason, the turbine operates irreversibly. The steam at inlet of the turbine is at 1300 kPa and 400 oC and discharges at 40 kPa and 100 oC.
(1) What is the power output of the turbine?
(2) Calculate the efficiency of the turbine (adiabatically irreversible) in comparison with a turbine that operate reversibly and adiabatically from the same initial conditions (1300 kPa and 400 oC) to the same final pressure of 40 kPa.
Please check the thermodynamic properties from the saturated and superheated steam table (30 points)
Solutions
genius_generous answered 2 years agoRelated Solutions
1. A steam turbine operates adiabatically with a steam rate of 25 kg/s. The steam is...
1. A steam turbine operates adiabatically with a steam rate of
25 kg/s. The steam is supplied at 300 kPA and 400 oC and
discharged at 40 kPA and 100 oC. Use steam tables to
solve this problem.
a. Determine the power output of the turbine.
b. Determine the power output of turbine for reversible
process.
A steam turbine operates adiabatically at a power level of 3500 kW. Steam enters the turbine...
A steam turbine operates adiabatically at a power level of 3500
kW. Steam enters the turbine at 2400 kPa and 500oC and
exhausts from the turbine at 20 kPa as saturated vapor. What is the
flow rate of steam run through the turbine, and what is the turbine
efficiency? Draw the process on the P-H diagram.
A heavily insulated steam turbine operates steadily and is supplied with 1 kg/s steam at 2MPa,...
A heavily insulated steam turbine operates steadily and is
supplied with 1 kg/s steam at 2MPa, 400 deg C. If the outlet
temperature is 100 deg C and the turbine has an output of 1000 kW
determine the quality of the outlet steam, the rate of entropy
generation and the isentropic efficiency of the turbine. (Changes
in kinetic and potential energy are negligible).
A heavily insulated steam turbine operates steadily and is supplied with 1 kg/s steam at 2MPa,...
A heavily insulated steam turbine operates steadily and is
supplied with 1 kg/s steam at 2MPa, 400 deg C. If the outlet
temperature is 100 deg C and the turbine has an output of 1000 kW
determine the quality of the outlet steam, the rate of entropy
generation and the isentropic efficiency of the turbine. (Changes
in kinetic and potential energy are negligible).
Steam enters a turbine at a rate of 550 kg/hr. The steam enters the turbine at...
Steam enters a turbine at a rate of 550 kg/hr. The steam enters
the turbine at 28 atm and 350°C at a linear velocity of 55 m/s. The
steam leaves the turbine at a point 3.5 m below the turbine inlet
at atmospheric pressure and a velocity of 355 m/s. The turbine
delivers shaft work at a rate of 50 kW, and the heat loss from the
turbine is estimated to be 2250 kcal/hr.
What is the temperature of the...
A mass flow rate of 2 kg/s of steam is expanded in an adiabatic turbine with...
A mass flow rate of 2 kg/s of steam is expanded in an adiabatic
turbine with an isentropic efficiency of 0.92. The steam enters at
3 MPa and 400 C and leaves at 30 kPa. Determine how much power the
turbine is producing. Express your result in kW.
(Sol: 1649 kW)
An adiabatic steam turbine receives 50 kg/s of superheated steam at 5 MPa and 500oC. Steam...
An adiabatic steam turbine receives 50 kg/s of superheated steam
at 5 MPa and 500oC. Steam exits the turbine with a pressure of 100
kPa. Determine the minimum exit quality and the maximum power
output of the turbine in kW.
A steam turbine receives 8 kg/s of steam at 9 MPa, 650 C and 60 m/s...
A steam turbine receives 8 kg/s of steam at 9 MPa, 650 C and 60
m/s (pressure, temperature and velocity). It discharges
liquid-vapor mixture with a quality of 0.94 at a pressure of 325
kPa and a velocity of 15 m/s. In addition, there is heat transfer
from the turbine to the surroundings for 560 kW. Find the power
produced by the turbine and express it in kW
A steam turbine receives superheated steam at 18.0 kg/s, 500.°C, and 3.00 MPa and exhausts it...
A steam turbine receives superheated steam at 18.0
kg/s, 500.°C, and 3.00 MPa and exhausts it to 10 kPa with a quality
of 96%. If the turbine is assumed to be internally reversible,
determine the rate of heat loss from the turbine surface if the
power output is 20.MW The surface temperature of the turbine is
uniform at 350.°C, and the local environment (ground state) is
taken to be saturated liquid water at T0 = 20.0°C. Neglect all flow
stream...
Saturated vapor steam enters a well-insulated turbine at 300oC. The mass flow rate is 1.00 kg/s...
Saturated vapor steam enters a well-insulated turbine at
300oC. The mass flow rate is 1.00 kg/s and the exit
pressure is 50 kPa. Determine the final state of the steam if the
turbine power output is 400 kW.
a). What is the amount of heat transfer in or out the turbine
?
b). Explain or show your calculation for your answer in a).
c). What is the substance that you use to look for pure
substance properties ?
d)....
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