In: Mechanical Engineering

3: Consider the Rankine power cycle using vapor and
liquid.

a: Explain what kinds of problems the Carnot Vapor Cycle has.

b: Draw a T-s diagram for the ideal Rankine cycle and label each
process explicitly.

c: There is a method to lower the condenser pressure in order to
improve the efficiency of the ideal Rankine cycle. Explain its
advantages and disadvantages explicitly.

d: Name the gas power cycle which uses the same four processes in
its cycle and draw the T-s diagram and the P-v diagram for the gas
power cycle.

Consider the Rankine power cycle using vapor and liquid.
a: Explain what kinds of problems the Carnot Vapor Cycle
has.
b: Draw a T-s diagram for the ideal Rankine cycle and label each
process explicitly.
c: There is a method to superheat steam to high temperature in
order to improve the efficiency of the ideal Rankine cycle. Explain
its advantages and disadvantages explicitly.
d: Name the gas power cycle which uses the same four processes
in its cycle and draw...

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 Rankine cycle engine. The engine will use 0.46
kilomoles of water vapor (treated as a diatomic
gas) that is initially at 1.5 atm in a 10 m3
vessel. Then, water vapor is compressed isobarically to
1/10th of its original volume. Next, the water vapor is
isochorically pressurized to 5 atm. The water is then isobarically
expanded to a volume of 4.23 m3. Finally, the water
vapor is allowed to adiabatically expand back to its original
pressure and volume....

Consider an ideal Rankine cycle using water with a high-pressure
side of the cycle at a supercritical pressure. Such a
cycle has a potential advantage of minimizing local temperature
differences between the fluids in the steam
generator, such as the instance in which the high-temperature
energy source is the hot exhaust gas from a gas-
turbine engine. Calculate the thermal efficiency of the cycle if
the state entering the turbine is 30 MPa, 550°C, and
the condenser pressure is 5...

Consider a steam power plant that operates on a reheat Rankine
cycle and has a net power output of 80 MW. Steam enters the
high-pressure turbine at 10 MPa and 500°C and the low-pressure
turbine at 1 MPa and 500°C. Steam leaves the condenser as a
saturated liquid at a pressure of 10 kPa. The isentropic efficiency
of the turbine is 78 percent and that of the pump is 95
percent.
a.)Determine the quality (or temperature, if superheated) of the...

Consider a steam power plant that operates on a reheat Rankine
cycle and has a net power output of 80 MW.
Steam enters the high-pressure turbine at 10 MPa and 500°C and the
low-pressure turbine at 1 MPa and 500°C. Steam leaves the condenser
as a saturated liquid at a pressure of 10 kPa. The isentropic
efficiency of the turbine is 80 percent, and that of the pump is 95
percent. Show the cycle on a T-s diagram with respect...

Consider a steam power plant that operates on a reheat Rankine
cycle and has a net power output of 80 MW. Steam enters the
high-pressure turbine at 10 MPa and 500°C and the low-pressure
turbine at 1 MPa and 500°C. Steam leaves the condenser as a
saturated liquid at a pressure of 10 kPa. The isentropic efficiency
of the turbine is 76 percent and that of the pump is 95
percent.
A: Determine the quality (or temperature, if superheated) of...

a.) What is the thermal efficiency of a steam power plant
operating on the Rankine cycle if saturated steam is supplied to
the turbine at 1000 psia, and the condenser is at 1 psia. Use a
turbine efficiency of 95% and a pump efficiency of 85%. Refer to
Chapter 9, Sections 10-11, as necessary.
b.) Determine the thermal efficiency if the steam is superheated to
1000 F, assuming all else equal.

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)

Consider a steam power plant operating on a simple ideal
Rankine cycle and having a net power output of 57 MW. The steam
enters the turbine at 9 MPa and 575 ° C and exits at 150 ° C, then
it is cooled in the condenser to a pressure of 100 kPa by means of
the cooling water from a lake and that circulates through the
condenser tubes to a rate of 1370 kg / s. Consider leaving the pump...

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