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In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known as
- a)Stage efficiency
- b)degree of reaction
- c)Rankine efficiency
- d)relative efficiency
Correct answer is option 'C'. Can you explain this answer?
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In a steam power plant, the ratio of the isentropic heat drop in the p...
Rankine Efficiency in Steam Power Plant
Rankine efficiency is the ratio of the actual work done by the system to the maximum possible work that could be done by the system. In a steam power plant, the Rankine efficiency is given by the ratio of the net work output to the heat input. The Rankine cycle is the basic cycle used in a steam power plant.
The Rankine cycle consists of four processes:
1. The boiler process: Heat is added to the water to convert it into steam at a constant pressure.
2. The turbine process: The steam expands in the turbine, doing work to drive the turbine and generator.
3. The condenser process: The steam is condensed back into water at a constant pressure.
4. The pump process: The water is pumped back to the boiler to start the cycle again.
Rankine Efficiency Formula
The Rankine efficiency is given by the following formula:
Rankine efficiency = (Net work output / Heat input) x 100%
or
Rankine efficiency = [(h1 - h2) / (h1 - h3)] x 100%
where h1 = enthalpy of steam at the inlet to the turbine, h2 = enthalpy of steam at the outlet of the turbine, and h3 = enthalpy of the steam at the inlet to the condenser.
Interpretation of Rankine Efficiency
The Rankine efficiency is a measure of the efficiency of the steam power plant. The higher the Rankine efficiency, the more efficient the power plant is in converting the heat input into useful work output. The Rankine efficiency is affected by several factors, including the steam pressure and temperature, the design of the turbine, and the design of the condenser.
Conclusion
In a steam power plant, the Rankine efficiency is the ratio of the net work output to the heat input. It is a measure of the efficiency of the power plant in converting the heat input into useful work output. The Rankine efficiency is affected by several factors, including the steam pressure and temperature, the design of the turbine, and the design of the condenser.
Rankine efficiency is the ratio of the actual work done by the system to the maximum possible work that could be done by the system. In a steam power plant, the Rankine efficiency is given by the ratio of the net work output to the heat input. The Rankine cycle is the basic cycle used in a steam power plant.
The Rankine cycle consists of four processes:
1. The boiler process: Heat is added to the water to convert it into steam at a constant pressure.
2. The turbine process: The steam expands in the turbine, doing work to drive the turbine and generator.
3. The condenser process: The steam is condensed back into water at a constant pressure.
4. The pump process: The water is pumped back to the boiler to start the cycle again.
Rankine Efficiency Formula
The Rankine efficiency is given by the following formula:
Rankine efficiency = (Net work output / Heat input) x 100%
or
Rankine efficiency = [(h1 - h2) / (h1 - h3)] x 100%
where h1 = enthalpy of steam at the inlet to the turbine, h2 = enthalpy of steam at the outlet of the turbine, and h3 = enthalpy of the steam at the inlet to the condenser.
Interpretation of Rankine Efficiency
The Rankine efficiency is a measure of the efficiency of the steam power plant. The higher the Rankine efficiency, the more efficient the power plant is in converting the heat input into useful work output. The Rankine efficiency is affected by several factors, including the steam pressure and temperature, the design of the turbine, and the design of the condenser.
Conclusion
In a steam power plant, the Rankine efficiency is the ratio of the net work output to the heat input. It is a measure of the efficiency of the power plant in converting the heat input into useful work output. The Rankine efficiency is affected by several factors, including the steam pressure and temperature, the design of the turbine, and the design of the condenser.
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Community Answer
In a steam power plant, the ratio of the isentropic heat drop in the p...
Friend , in steam power plant the isentropic heat rejection takes plAce in turbine so turbine power to the specific heat consumption is i think Rankine efficiency . not sure but think if it is helpful for you
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In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known asa)Stage efficiencyb)degree of reactionc)Rankine efficiencyd)relative efficiencyCorrect answer is option 'C'. Can you explain this answer?
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In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known asa)Stage efficiencyb)degree of reactionc)Rankine efficiencyd)relative efficiencyCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known asa)Stage efficiencyb)degree of reactionc)Rankine efficiencyd)relative efficiencyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known asa)Stage efficiencyb)degree of reactionc)Rankine efficiencyd)relative efficiencyCorrect answer is option 'C'. Can you explain this answer?.
In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known asa)Stage efficiencyb)degree of reactionc)Rankine efficiencyd)relative efficiencyCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known asa)Stage efficiencyb)degree of reactionc)Rankine efficiencyd)relative efficiencyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a steam power plant, the ratio of the isentropic heat drop in the primemover to the amount of heat supplied per unit mass of steam is known asa)Stage efficiencyb)degree of reactionc)Rankine efficiencyd)relative efficiencyCorrect answer is option 'C'. Can you explain this answer?.
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