Question
In: Mechanical Engineering
8. In a Rankine cycle steam enters the turbine at 900 psia and 1000oF and exhausts...
8. In a Rankine cycle steam enters the turbine at 900 psia and
1000oF and exhausts at 1 psia. What is the thermal
efficiency? Neglect pump work.
State your answer as a percent to one decimal place. Example:
25.2
9. Steam is expanded to 12% moisture at 1 psia in a Rankine
cycle. If the initial pressure is 400 psia, what is the efficiency?
Neglect pump work.
Express your answer as a percent to one decimal place. Example:
32.5
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Solutions
Expert Solution
for finding the enthalpy from moiller diagram i m first convert pressure into bar bcoz i have moiller diagaram in si units so to take reading from moiller diagram i am first take itersection point of given pressure and temp. in qsn 8 and in qsn 9 i take intersection point of quality of steam and pressure .. at intersection point digaram shows me enthalpy and entropy in Y and X axis ..
similarly to take value of point 3 i have given formula in the solution .. hope you know how to take reading from moiller diagram ..
samet mamat answered 2 years agoRelated Solutions
An ideal Rankine cycle operates with a turbine inlet pressure of 900 psia and a turbine...
An ideal Rankine cycle operates with a turbine inlet pressure of
900 psia and a turbine inlet temperature of 572 oF. The steam is
isentropically expanded through the turbine to 5 psia as
illustrated on the T-s diagram shown below. Using the Mollier
diagram, determine the percent moisture at the turbine outlet under
these operating conditions. State your answer in whole numbers.
A steam power plant operates on a practical Rankine Cycle. The steam enters the turbine at...
A steam power plant operates on a practical Rankine Cycle. The
steam enters the turbine at 3 MPa and “648” K and is condensed in
the condenser at a pressure of 46 kPa. You are assigned on a
project to improve the thermal efficiency of this plant. a) Draw
the schematic of the plant and determine the thermal efficiency of
the practical cycle assuming that the efficiencies of pump and
turbine are 0.75 and 0.7, respectively. ( b) Draw a...
A steam power plant operates on the simple ideal rankine cycle. the steam enters the turbine...
A
steam power plant operates on the simple ideal rankine cycle. the
steam enters the turbine at 4 MPa and 500 C and leaves it at 50 kPa
and 150 C. the water leaves the condenser as a saturated liquid and
is subsequently displaced to the boiler by means of a pump at a
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A steam power plant operates on a regenerative Rankine cycle. Steam enters the turbine at 6...
A steam power plant operates on a regenerative Rankine cycle.
Steam enters the turbine at 6 MPa at 700 ºC and the condenser at 10
kPa. Turbine has isentropic efficiency of 85% and pumps have
isentropic efficiency of 90%. Steam is extracted from the turbine
at 0.6 MPa to heat the feedwater in an open feedwater heater. Water
leaves the open feedwater heater as saturated liquid.
a) Draw the system with labels and show the ideal and the
non-ideal cycle...
Consider a steam power plant operating on the simple ideal Rankine cycle. Steam enters the turbine...
Consider a steam power plant operating on the simple ideal
Rankine cycle. Steam enters the turbine at 15 MPa and 600°C. The
steam condenses in the condenser at 10 kPa. Use the EES software to
study the effects of the following cases on the cycle performance
and to sketch the T-s diagram for each case:
Plot the variation of the cycle thermal efficiency with the
turbine isentropic efficiency. Take the isentropic efficiency of
the turbine in the range 70% to...
Consider a steam power plant operating on the simple ideal Rankine cycle. Steam enters the turbine...
Consider a steam power plant operating on the simple ideal
Rankine cycle. Steam enters the turbine at 15 MPa and 600°C. The
steam condenses in the condenser at 10 kPa. Use the EES software to
study the effects of the following cases on the cycle performance
and to sketch the T-s diagram for each case:
#Plot the variation of the cycle thermal efficiency with the
turbine isentropic efficiency. Take the isentropic efficiency of
the turbine in the range 70% to...
In a power plant based on a simple Rankine cycle, steam enters the turbine at 15...
In a power plant based on a simple Rankine cycle, steam
enters the turbine at 15 MPa and 900°C. The condenser pressure is 5
kPa. The turbine operates adiabatically and has an isentropic
efficiency of 85%, and the pump also operates adiabatically and has
an isentropic efficiency of 80%. Determine
the work required to pump the water to the boiler in
kJ/kg of water flowing, and
the enthalpy of the water leaving the pump.
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...
Consider steam in an ideal Rankine cycle. The saturated vapor enters the turbine at 8.0 MPa.
Consider steam in an ideal Rankine cycle. The saturated vapor enters the turbine at 8.0 MPa. Saturated liquid exits the condenser at P = 0.008 MPa. The net power output of the cycle is 100 MW.
determine the thermal efficiency of the cycle
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...
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