Question
In: Mechanical Engineering
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.
Solutions
samet mamat answered 2 years agoRelated Solutions
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...
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 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...
Use water as the working fluid ,apply Rankine power cycle with reheat . The first stage...
Use water as the working fluid ,apply Rankine power cycle with
reheat . The first stage turbine inlet conditions are 15MPa and 600
C. All the turbines are known to have isentropic efficiency of 95%,
however the pump is assumed as an isentropic pump. If the maximum
temperature is kept at 500 C and the condenser pressure is 5 kPa,
by constructing a suitable plot, show that having more than 2
reheat stages is not practical. (Hint: Take at least...
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...
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...
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.
Calculate the total heat addition, net work of the cycle, heat
extraction through condenser,
and thermal efficiency of this ideal Rankine cycle with
reheat
An ideal Rankine cycle with reheat uses water as the working fluid. As shown in the...
An ideal Rankine cycle with reheat uses water as the working
fluid. As shown in the figure below, the conditions at the inlet to
the first turbine stage are 1600 lbf/in.2, 1200°F and
the steam is reheated to a temperature of T3 =
800°F between the turbine stages at a pressure of
p3 = p2 = 400
lbf/in.2
For a condenser pressure of p5 =
p4 = 5 lbf/in.2, determine:
(a) the quality of the steam at the second-stage turbine...
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...
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