Question
In: Mechanical Engineering
actual rankine engine turbo generator receives steam at a pressure of 10 MPa and entropy at...
actual rankine engine turbo generator receives steam at a pressure
of 10 MPa and entropy at 6.9310 kj/kg*k the steam then expands to
500 Kpa with a temperature of 250 C and leaves the following
condenser at saturated liquid at 150 C
find the following:
a. find the engine thermal efficiency of the engine
b. actual steam rate for the engine
c. if mechanical efficiency is 80% and the generator
efficiency is 90%. what is the combined work in kw if mass steam
flow rate is 5000 kg/hr?
Solutions
samet mamat answered 4 months agoRelated Solutions
An actual Rankine Engine turbo-generator receives steam at a pressure of 10MPa and etropy of 6.931...
An actual Rankine Engine turbo-generator receives steam at a
pressure of 10MPa and etropy of 6.931 j/kgK, the steam then expands
to 500kPa with a temperature of 250°C and leaves the condenser as a
saturated liquid at 150°C.
a. find the engine thermal efficiency of the actual engine
b. The actual steam rate for the engine
c. if the mechanical efficiency is 80% and the generator
efficiency is 90%. What is the combined work in kW if mass steam
flow...
Steam at 32 MPa, 520◦C leaves the steam generator of an ideal Rankine cycle modified to...
Steam at 32 MPa, 520◦C leaves the steam generator of an ideal
Rankine cycle modified to include three turbine
stages with reheat between the stages. The reheat pressures are
4 and 0.5 MPa, respectively, and steam enters the second-
stage turbine at 440◦C and the third-stage turbine at 360◦C. The
condenser pressure is 0.08 bar. Determine for the cycle
a) The net work per unit mass of steam flowing, in kJ/kg.
b) The thermal efficiency.
The inlet pressure of a steam generator is to be held constant at 5.00 MPa. During...
The inlet pressure of a steam generator is to be held constant
at 5.00 MPa. During the test, the inlet pressure
was measured 120 times. The resolution of the
digital pressure gauge used was 0.001 MPa. The number of results,
m, is the number of readings falling in an interval of ±0.04 MPa
centered about the listed pressure.
Pressure, p, in MPa
Number of Results, m
4.960
4
4.970
6
4.980
6
4.990
35
5.000
45
5.010
14
5.020
5...
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...
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
Another type of external combustion steam engine in the Rankine cycle engine. You are told a...
Another type of external combustion steam engine in the Rankine
cycle engine. You are told a Rankine engine will be operated in the
following manner. The engine will use 0.46 kilomoles of water
vapor. The water vapor is initially at 1.5 atm in a 10
m3 vessel. The water vapor is compressed isobarically to
1/10th of its original volume. The water vapor is then
isochorically pressurized to 5 atm. The water is then isobarically
expanded to a volume of 4.23...
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....
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