Question
In: Mechanical Engineering
A steam thermoelectric plant operates a Rankine cycle with overheating. Water enters the pump as saturated...
A steam thermoelectric plant operates a Rankine cycle with overheating. Water enters the pump as saturated liquid , 7.7 kg/s. The efficiency of the pump is 0.9 The water enters the high pression turbine at 12 500 kPa and 550°C, after that steam overheats at a constant pressure of 2000 kPa until 450°C before it expands on the low pressure turbine. The efficiency of both turbines is 0.85. The vapor quality when it enters to the condenser is 0.95 Determine the thermal efficiency of the cycle.
Solutions
samet mamat answered 2 years agoRelated Solutions
A steam thermoelectric plant operates a Rankine cycle with overheating. Water enters the pump as saturated...
A steam thermoelectric plant operates a Rankine cycle with
overheating. Water enters the pump as saturated liquid , 7.7 kg/s.
The efficiency of the pump is 0.9 The water enters the high
pression turbine at 12 500 kPa and 550°C, after that steam
overheats at a constant pressure of 2000 kPa until 450°C before it
expands on the low pressure turbine. The efficiency of both
turbines is 0.85. The vapor quality when it enters to the condenser
is 0.95 Determine...
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
temperature of 85 C, which is the isentrophic efficiency of the
turbine?
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...
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 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
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.
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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