Question
In: Mechanical Engineering
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) The heat addition to the cycle,
(b) the consumption rate of U-235 to
maintain the heat addition if this is a nuclear power plant, and
(c) the consumption rate of natural gas
to maintain the cycle
Problem 2.
Re-do problem 1 using an isentropic efficiency of 80% for both stages of the turbine and the pump
Solutions
samet mamat answered 2 years 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...
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...
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 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...
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....
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...
A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits...
A simple ideal Rankine cycle with water as the working fluid
operates between the pressure limits of 4 MPa in the boiler and 5
kPa in the condenser and a turbine inlet temperature of 700°C. The
boiler is sized to provide a steam flow of 50 kg/s. Determine the
power produced by the turbine and consumed by the pump. Use steam
tables.
Find the values of power produced by the
turbine and consumed by the pump in
kW
Consider an ideal Rankine cycle modified with the addition of a single reheat stage. The working...
Consider an ideal Rankine cycle modified with the addition of a
single reheat stage. The working fluid is H20. The maximum pressure
in the cycle is 10MPa, and the temperature of the steam exiting
both the boiler and the reheater is 550°C. The pressure in the
condenser is 10kPa.
1.Draw the T-s diagram for the following three cases.
a) 4.5MPa (= 0.25Pmax + 2MPA)
b) 2.5MPA (= 0.25Pmax)
c) 0.5MPa (= 0.25Pmax - 2MPA)
2.Calculate the thermal efficiency for the...
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