Question
In: Mechanical Engineering
A 400-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency...
A 400-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 33 percent. (i) Sketch an appropriate illustration for this heat engine clearly showing the heat source and sink. (ii) Determine the rate of heat transfer to the river water. (iii) Will the actual heat transfer rate be higher or lower than this value? Why?
Solutions
samet mamat answered 1 year agoRelated Solutions
6. A 600-MW steam power plant, which is cooled by a nearby river, has a thermal...
6.
A 600-MW steam power plant, which is cooled by a nearby river, has
a thermal efficiency of 35 percent. Determine the rate of heat
transfer to the river water.
a.) What is the thermal efficiency of a steam power plant operating on the Rankine cycle...
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.
A 1000 MW power plant of 35% thermal efficiency is proposed. The plant burns 3% sulphur...
A 1000 MW power plant of 35% thermal efficiency is proposed. The
plant burns 3% sulphur coal with a heating value of 6000 Kcal/kg
and emits 64000 m3/min of flue gas. What is the concentration of
SO2 in the flue gas in ppm? Assume that the density of SO2 is 1920
g/m3.
The following data collected from a steam turbine of 25 MW capacity thermal power plant: Assume...
The following data collected from a steam turbine of 25 MW
capacity thermal power plant:
Assume R for air as 287 kJ/kg C
Steam condensed = 40000 kh/hr
Temperaure of steam in condenser =40 degree
Dryness of steam enetring condenser = 0.85
Air leakage in the condenser = 140 kg/hr
Temperature of codenser =35 degree
Temperature at the suction of air pump = 32 degree
Borometer reading = 76 cm of Hg
Maximum rise in cooling water temperature =12 degree...
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...
Consider a coal-fired steam power plant that produces 175 MW of electric power. The power plant...
Consider a coal-fired steam power plant that produces 175 MW of
electric power. The power plant
operates on a simple ideal Rankine cycle with turbine inlet
conditions of
7 MPa and 550°C and a condenser pressure of 15 kPa. The coal has
a
heating value (energy released when the fuel is burned) of 29,300
kJ/kg.
Assuming that 75% of this energy is transferred to the steam in the
boiler
and that the pump has an efficiency of 80% and the...
The net power of a combined gas-steam power plant is 450 MW. The pressure ratio of...
The net power of a combined gas-steam power plant is 450 MW. The
pressure ratio of the gas turbine cycle is 14, the air enters the
compressor at a temperature of 300 K and the turbine at a
temperature of 1400 K. Combustion end gases coming out of the gas
turbine produce steam at a waste heat boiler at 8 MPa pressure and
400 degrees Celsius temperature and exit the boiler at 460 K
temperature. The steam cycle has an...
Design a steam power cycle that can achieve a cycle thermal efficiency of at least 40%...
Design a steam power cycle that can achieve a cycle thermal
efficiency of at least 40% under the conditions that all turbines
have isentropic efficiencies of 80% and all pumps have isentropic
efficiencies of 65%. Prepare an engineering report describing your
design. Your design report must include, but is not limited to, the
following:
1. Discussion of various cycles attempted to meet the goal as
well as the positive and negative aspects of your design.
2. System figures and T-s...
A nuclear power plant operates at 40.0% efficiency with a continuous production of 1202 MW of...
A nuclear power plant operates at 40.0% efficiency with a
continuous production of 1202 MW of usable power in 1.00 year and
consumes 1.23×106 g of uranium-235 in this time period. What is the
energy in joules released by the fission of a single uranium-235
atom?
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