Question
In: Mechanical Engineering
A steam power plant operates with a boiler that is heated from a heat source at...
A steam power plant operates with a boiler that is heated from a heat source at 457 °C and produces 450 ton/hr. of steam. The steam leaves the boiler at 425 °C and 4 MPa. The steam reaches a turbine at 375 °C and 3 MPa and leaves it at 50 kPa with 4% liquid water. This mixture is flown into a condenser that rejects the heat into a river at 17 °C. Water leaves the condenser at 50 kPa and 50 °C and pumped by a pump operating at 10 kJ/kg. The water leaves the pump at 4 MPa.
1. Draw the complete cycle with all numeric values of the problem depicted on the drawing. [10 points]
2. Calculate the Carnot efficiency of the cycle. [10 points]
3. Calculate the specific heat loss (kJ/kg) in the pipeline between the boiler and the turbine. Define input/output. [10 points]
4. Calculate the turbine work in MW. Define input/output. [10 points]
5. Calculate the specific heat transfer (kJ/kg) in the condenser. Define input/output. [10 points]
6. Determine the specific heat transfer (kJ/kg) in the boiler. Define input/output. [10 points]
7. Determine thermal efficiency of the cycle. [10 points]
8. Determine the isentropic efficiency of the turbine. [10 points]
9. Calculate the specific entropy (kJ/kg-K) of the cycle and explain whether this is a feasible process. [10 points]
10. Calculate the total specific entropy change (kJ/kg-K) of the system and explain whether this is a feasible process. [10 points]
Solutions
samet mamat answered 1 year agoRelated Solutions
A steam power plant with boiler use coal fuel with net heat 4000 kcal/kg and boiler...
A steam power plant with boiler use coal fuel with net heat 4000
kcal/kg and boiler efficiency 90%. If steam utrbine from the power
plsnt generate power output 100 MW, at condition vapor enter at 10
MPa, 520oC and condensate to saturated liquid at 0.08
bar. If the isentropic efficiency turbine and pump is 90%, then
a) Calculate coal required (ton/hour)
b) Calculate netto efficiency of the power plant
c) Calculate Net Plant Heat Rate (kCal/kWh)
A steam power plant receives heat from a furnace at a rate of 280 GJ/h. Heat...
A steam power plant receives heat from a furnace at a
rate of 280 GJ/h. Heat losses to
the surrounding air from the steam as it passes through the pipes
and other components
are estimated to be about 8 GJ/h. If the waste heat is transferred
to the cooling water at a rate
of 145 GJ/h, determine (a) net power output and (b) the thermal
efficiency of this
power plant
At a steam power plant, steam engines work in pairs, the heat output of the first...
At a steam power plant, steam engines work in pairs, the heat
output of the first one being the approximate heat input of the
second. The operating temperatures of the first are 770 ∘C and 460
∘C, and of the second 435 ∘C and 280 ∘C.
A) If the heat of combustion of coal is 2.8×107J/kg, at what
rate must coal be burned if the plant is to put out 860 MW of
power? Assume the efficiency of the engines...
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 boiler of a thermoelectric power plant produces 1540.8 m3/h of saturated steam at 900 kPa
A boiler of a thermoelectric power plant produces 1540.8 m3/h of saturated steam at 900 kPa. Determine the mass flow rate of steam produced (kg/s).
Steam leaves the boiler of a 100 MW Rankine cycle power plant at 400°C and 3.5MPa....
Steam leaves the boiler of a 100 MW Rankine cycle power plant at
400°C and 3.5MPa. The Turbine has an isentropic efficiency of 85%
and exhausts at 15 kPa. In the condenser, the water is subcooled to
38°C by lake water at 13°C. The pump isentropic efficiency is 75%
Draw and label the T-s diagram (4 points) for this cycle and
determine: 1. The cycle’s thermal efficiency (7 points) 2. The mass
flow rate of the steam in the boiler...
Steam leaves the boiler of a 100 MW Rankine cycle power plant at 400°C and 3.5MPa....
Steam leaves the boiler of a 100 MW Rankine cycle power plant at
400°C and 3.5MPa. The Turbine has an isentropic efficiency of 85%
and exhausts at 15 kPa. In the condenser, the water is subcooled to
38°C by lake water at 13°C. The pump isentropic efficiency is
75%.
1. Draw and label the T-s diagram for this cycle
2. Determine the cycle’s thermal efficiency
3. Determine the mass flow rate of the steam in the boiler
(kg/h)
4. Determine...
In a nuclear power plant, heat from radioactive decay boils water and produces steam. If 250...
In a nuclear power plant, heat from radioactive decay boils
water and produces steam. If 250 Liters/min of water are turned to
steam, and the efficiency of this system is 0 .5575% then
determine:
a)How many Joules/minute can be produced by this generator? The
latent heat of vaporization of water is 2,230 J/g.
b) if the energy content of the enhanced Uranium fuel used in
the reactor is 500,000 MJ/kg (really!), how much Uranium PER YEAR
is “used” to boil...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- An organization faces several internal and external risks in economic decision, such as high competition, failure...
- You have an Hfr strain of E. coli that contains wild-type genes for maltose catabolism and...
- Go on a company's website (who produces a good) and find their sustainability and or/community section....
- Integrated Waveguide Technologies (IWT) is a 6-year-old company founded by Hunt Jackson and David Smithfield to...
- The Sunbelt Corporation has $44 million of bonds outstanding that were issued at a coupon rate...
- in java Write an interface for a CD player. It should have the standard operations (i.e....
- A 2.9 kg block with a speed of 3.6 m/s collides with a 5.8 kg block...
ADVERTISEMENT