Question
In: Mechanical Engineering
A steam powerplant operating on an ideal Rankine Cycle is operating at a boiler pressure of...
A steam powerplant operating on an ideal Rankine Cycle is operating at a boiler pressure of 5.75MPa, steam enters the turbine at 500°C and expands to 147kPa. If the powerplant is producing 5MW of energy find the following:
- Enthalpies at each point of the cycle 1,2,3,B (hint: you will have to interpolate horizontally for point 1 and interpolate for the f,g,fg values for point 2)
- Net work in kj/kg
- Mass flow rate of throttle steam used by the powerplant
- Heat added in the boiler
- Heat rejected in the condenser
- Cycle Thermal efficiency
Solutions
Expert Solution
The ideal Rankyne cycle refers to issentropic expansion in turbine and issentropic pump work.
using steam table ,we can calculate enthapy and entropy at each point.
hence we can find all asked values at specified points.
see below complete solution.
samet mamat answered 2 years agoRelated Solutions
1. A steam powerplant operating on an ideal Rankine Cycle is operating at a boiler pressure...
1. A steam powerplant operating on an ideal Rankine Cycle is
operating at a boiler pressure of 5.75 MPa, steam enters the
turbine at 500°C and expands to 147 kPa. If the powerplant is
producing 5MW of energy find the following:
a. Enthalpies at each point of the cycle 1,2,3,B
b. Net work in kj/kg
c. Mass flow rate of throttle steam used by the powerplant
d. heat added in the boiler
e. heat rejected in the condenser
f. cycle...
Consider a steam power plant operating on the ideal reheat Rankine cycle. Steam enters the high-pressure...
Consider a steam power plant operating on the ideal reheat
Rankine cycle. Steam enters the high-pressure turbine at
PH MPa and
TH °C and is condensed in the
condenser at a pressure of PL
kPa. Assume the steam is reheated to the inlet
temperature of the high-pressure turbine, and that pump work is NOT
negligible. If the moisture content of the steam at the exit of the
low-pressure turbine is not to exceed
w% percent, determine:
(a) the pressure at...
A steam Rankine cycle operates between the pressure limits of 1500 psia in the boiler and...
A steam Rankine cycle operates between the pressure limits of
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inlet temperature is 800°F. The turbine isentropic efficiency is 90
percent, the pump losses are negligible, and the cycle is sized to
produce 2500 kW of power. Calculate the mass flow rate through the
boiler, the power produced by the turbine, the rate of heat supply
in the boiler, and the thermal efficiency. Use steam tables
An ideal Rankine cycle operates between the pressure limits of 15 MPa in the boiler and...
An ideal Rankine cycle operates between the pressure limits of
15 MPa in the boiler and 50 kPa in the condenser. The boiler
generates steam at a mass flow rate of 50 kg/s and it enters the
turbine at a temperature of 1100 °C. a) Calculate the net output of
the cycle b) Calculate the thermal efficiency of the cycle.
Ideal Reheat Steam Cycle (10) Consider a steam power plant operating on the ideal reheat Rankine...
Ideal Reheat Steam Cycle (10)
Consider a steam power plant operating on the ideal
reheat Rankine cycle. Steam enters the high-pressure turbine at PH
MPa and TH °C and is condensed in the condenser at a pressure of PL
kPa. Assume the steam is reheated to the inlet temperature of the
high-pressure turbine, and that pump work is NOT negligible. If the
moisture content of the steam at the exit of the low-pressure
turbine is not to exceed w% percent,...
Consider a steam power plant operating on a simple ideal Rankine cycle in which the steam...
Consider a steam power plant operating on a simple ideal Rankine
cycle in which the steam enters the turbine at 3 MPa and 350C and
is condensed in the condenser at 75 kPa. Determine the thermal
efficiency of this cycle and sketch an appropriately labeled T-s
diagram. Also compare this thermal efficiency to that a Carnot heat
engine operating between these same two limits.
The change in enthalpy across the pump = work done by the pump:
h2-h1= v1(P2– P1)
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...
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...
Consider a simple ideal Rankine cycle which uses water as the working fluid. The boiler pressure...
Consider a simple ideal Rankine cycle which uses water as the
working fluid. The boiler pressure is 6100 kPa and the condenser
pressure is 30 kPa. At the turbine inlet, steam is at 480°C. The
isentropic efficiency of the turbine is 92 percent. The pump losses
are negligible and the water leaving the condenser is subcooled by
6.3°C. The boiler is sized for a mass flow rate of 20 kg/s.
Determine the following values.
The temperature at the pump inlet....
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