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A Rankine power cycle with reheat uses water as the working fluid. The inlet conditions of...
A Rankine power cycle with reheat uses water as the working
fluid. The inlet conditions of the
first stage turbine are 14MPa and 600oC. All the turbines are known
to have isentropic
efficiency of 85%, however the pump is assumed as an isentropic
pump. If the maximum
temperature is kept at 600oC and the condenser pressure is 6 kPa,
by constructing a suitable
plot, show that having more than 2 reheat stages is not practical.
(Hint: Take at least three
reheat pressures between 2 to 12 MPa)
Note: You may construct the plot on Microsoft Excel or manually on
a graph paper. However,
all the calculations involved must be performed manually, in
details and must be shown clearly.
Solutions
Amanda K answered 1 year agoRelated Solutions
An ideal Rankine Cycle with reheat uses water as the working fluid with a flow rate...
An ideal Rankine Cycle with reheat uses water as the working
fluid with a flow rate of 0.15 kg/s.
At the inlet of the turbine (state 1) the water is a superheated
vapor at 475ºC and 11 MPa.
The pressure at the exit of the first stage of the turbine is 0.9
MPa.
The reheat temperature (state 3) is
also 475ºC.
The condenser pressure is 8 kPa, and the water exits as a saturated
liquid
Find: (a) The heat addition to...
An ideal Rankine Cycle with reheat uses water as the working fluid with a flow rate...
An ideal Rankine Cycle with reheat uses water as the working
fluid with a flow rate of 0.15 kg/s.
At the inlet of the turbine (state 1) the water is a superheated
vapor at 475ºC and 11 MPa.
The pressure at the exit of the first stage of the turbine is 0.9
MPa.
The reheat temperature (state 3) is
also 475ºC.
The condenser pressure is 8 kPa, and the water exits as a saturated
liquid
Find: (a) The heat addition to...
Problem 2. Problem 1. An ideal Rankine Cycle with reheat uses water as the working fluid...
Problem 2.
Problem 1.
An ideal Rankine Cycle with reheat uses water as the working
fluid with a flow rate of 0.15 kg/s.
At the inlet of the turbine (state 1) the water is a superheated
vapor at 475ºC and 11 MPa.
The pressure at the exit of the first stage of the turbine is 0.9
MPa.
The reheat temperature (state 3) is
also 475ºC.
The condenser pressure is 8 kPa, and the water exits as a saturated
liquid
Find: (a)...
A reheat Rankine cycle operates with water as the working fluid. Steam enters the first turbine...
A reheat Rankine cycle operates with water as the working fluid.
Steam enters the first turbine at 8 MPa and 450◦C and exits at 0.8
MPa. It is then reheated at 400◦C before entering the second
turbine, where it exits at 10 kPa. If the amount of work into the
pump is 8.04 kJ/kg and the net work per cycle produced is 1410.5
kJ/kg, determine the thermal efficiency. Assume no pressure losses
in the condenser or the boiler.
Consider a simple ideal Rankine cycle which uses water as the working fluid. The net power...
Consider a simple ideal Rankine cycle which uses water as the
working fluid. The net power of power plant is 220-MW. At the
turbine inlet, steam is at 9 MPa and 560°C. The condenser pressure
is 20 kPa. Determine the following values.
The temperature at the pump inlet.
°CThe specific enthalpy at the pump inlet.
kJ/kgThe specific volume at the pump inlet.
m3/kgThe pump work.
kJ/kgThe temperature at pump exit.
°CThe specific entropy at turbine inlet.
kJ/kg·KThe quality of steam...
Steam is the working fluid in an ideal Rankine cycle with superheat and reheat. Steam enters...
Steam is the working fluid in an ideal Rankine cycle with
superheat and reheat. Steam
enters the high-pressure turbine at 8.0MPa, 480̊C, and expands to
0.6MPa. It is then reheatedto 450̊C before entering the
low-pressure turbine where it expands to the condenser pressure of
10kPa. The net power output is 110MW.
A closed feedwater heater (CFWH) which uses steam extracted fromthe
low-pressure turbine at 0.5MP. The extracted steam leaves the CFWH
as a saturated liquid and is then pumped up...
A Rankine cycle uses water as its working fluid. The mass flow rate of water through...
A Rankine cycle uses water as its working fluid. The mass flow
rate of water through the cycle is 150 kg/s. Superheated vapour
exits the boiler at 8 MPa and 560 °C. The condenser pressure is 8
kPa. The water at the pump inlet is 35 °C. The isentropic
efficiency of the pump is 75% and the isentropic efficiency of the
turbine is 91%. The turbine and pump can be treated as adiabatic.
The pressure drops of the working fluid...
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....
3.A simple Rankine cycle uses water as the working fluid. The boiler operates at 6000 kPa...
3.A simple Rankine cycle uses water as the working fluid. The
boiler operates at 6000 kPa and the condenser at 50 kPa. At the
entrance to the turbine, the temperature is 450°C. The isentropic
efficiency of the turbine is 90 percent, pressure and 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 (a) the rate at which heat is added in the...
Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at...
Water is the working fluid in an ideal Rankine cycle. Saturated
vapor enters the turbine at 16 MPa, and the condenser pressure is 8
kPa. The mass flow rate of steam entering the turbine is 50
kg/s.
Determine:
(a) the net power developed, in kW.
(b) the rate of heat transfer to the steam passing through the
boiler, in kW.
(c) the percent thermal efficiency.
(d) the mass flow rate of condenser cooling water, in kg/s, if the
cooling water...
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