Question
In: Mechanical Engineering
Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa...
Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa of a steam Rankine power cycle. Isentropic efficiencies of the turbine and pump are 84% and 73%, respectively. Determine for the cycle
a. Sketch the cycle of a T-s diagram. Indicate the isobars with their values and the values for temperature and entropy.
b. The heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam flowing.
c. The thermal efficiency.
d. Compute the entropy generated by the turbine per unit of mas of steam flowing.
e. The heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam flowing. [Hint: this refers to the cooling tower]
Solutions
samet mamat answered 1 year agoRelated Solutions
Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa...
Superheated vapor enters the turbine at 10 MPa, 480°C, and the
condenser pressure is 7.5 kPa of a steam Rankine power cycle.
Isentropic efficiencies of the turbine and pump are 84% and 73%,
respectively. Determine for the cycle
a. Sketch the cycle of a T-s diagram. Indicate the isobars with
their values and the values for temperature and entropy.
b. The heat transfer to the working fluid passing through the
steam generator, in kJ per kg of steam flowing.
c....
Superheated steam at 20 MPa, 640°C enters the turbine of a vapor power plant. The pressure...
Superheated steam at 20 MPa, 640°C enters the turbine of a vapor
power plant. The pressure at the exit of the turbine is 0.5 bar,
and liquid leaves the condenser at 0.4 bar at 75°C. The pressure is
increased to 20.1 MPa across the pump. The turbine and pump have
isentropic efficiencies of 81 and 85%, respectively. Cooling water
enters the condenser at 20°C with a mass flow rate of 70.7 kg/s and
exits the condenser at 38°C. For the...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor
enters the turbine at 10 MPa and
480 °C, while the condenser pressure is 6 kPa. Steam expands
through the first-stage turbine to
0.7 MPa and then is reheated to 480 °C
a) Calculate the total heat addition, net work of the cycle, heat
extraction through condenser,
and thermal efficiency of this ideal Rankine cycle with reheat.
[25]
b) Calculate the same quantities assuming that the pump and each
turbine...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor
enters the turbine at 10 MPa and
480 °C, while the condenser pressure is 6 kPa. Steam expands
through the first-stage turbine to
0.7 MPa and then is reheated to 480 °C
a) For a pressure of 7 bar right after the first stage turbine in
the ideal Rankine cycle, create
two plots: thermal efficiency as a function of the reheat
temperature from 200 °C to
500 °C; and the...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor
enters the turbine at 10 MPa and
480 °C, while the condenser pressure is 6 kPa. Steam expands
through the first-stage turbine to
0.7 MPa and then is reheated to 480 °C.
Calculate the total heat addition, net work of the cycle, heat
extraction through condenser,
and thermal efficiency of this ideal Rankine cycle with
reheat
Rankine cycle operates on boiler pressure 15 MPa and condenser pressure of 30 kPa. Superheated steam...
Rankine cycle operates on boiler pressure 15 MPa and condenser
pressure of 30 kPa. Superheated steam enters the high-pressure
turbine at 450°C. The high-pressure turbine expands the steam and
enters the re-heater at 2.5 MPa. The steam is reheated until
temperature reaches 450°C before being expanded in low-pressure
turbine to condenser pressure of 30 kPa. Assume the isentropic
efficiency of the low-pressure and high-pressure turbines are 94%
and 89% respectively, and pump is working isentropically. Neglect
the change in kinetic...
Superheated steam enters a turbine at 3 MPa, 550oC, and exits at 0.01 MPa. a) If...
Superheated steam enters a turbine at 3 MPa, 550oC, and exits at
0.01 MPa.
a) If the process is reversible adiabatic (isentropic), find the
final
temperature (T2s), the final enthalpy (h2s) of the steam, and the
turbine
work (Wt,s).
b) What is Sgen for the above process?
c) If the isentropic efficiency is 90%, find the actual final
temperature (T2a)
and calculate Sgen?
d) Plot process (a) and (c) on a Ts diagram.
Superheated steam at 8 MPa and 480°C leaves the steam generator of a vapor power plant....
Superheated steam at 8 MPa and 480°C leaves the steam generator
of a vapor power plant. Heat transfer and frictional effects in the
line connecting the steam generator and the turbine reduce the
pressure and temperature at the turbine inlet to 7.7 MPa and 440°C,
respectively. The pressure at the exit of the turbine is 10 kPa,
and the turbine operates adiabatically. Liquid leaves the condenser
at 8 kPa, 36°C. The pressure is increased to 8.6 MPa across the
pump....
Superheated steam at 8 MPa and 480°C leaves the steam generator of a vapor power plant....
Superheated steam at 8 MPa and 480°C leaves the steam generator
of a vapor power plant. Heat transfer and frictional effects in the
line connecting the steam generator and the turbine reduce the
pressure and temperature at the turbine inlet to 7.3 MPa and 440°C,
respectively. The pressure at the exit of the turbine is 10 kPa,
and the turbine operates adiabatically. Liquid leaves the condenser
at 8 kPa, 36°C. The pressure is increased to 8.6 MPa across the
pump....
Steam enters a turbine at 10 MPa, 410oC, and 80 m/s, and leaves at 10 kPa,...
Steam enters a turbine at 10 MPa, 410oC, and 80 m/s,
and leaves at 10 kPa, 90 percent quality and 50 m/s. Steam flows
steadily through the turbine at 10 kg/s and the heat loss from the
turbine is 0.5 kW. Neglecting potential energy changes,
determine
The power output of the turbine (kW)
The turbine inlet area (m2)
The turbine outlet area (m2)
The volume flow rate of steam at turbine outlet
(m3/s)
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