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Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases.
Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'A'. Can you explain this answer?
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Assertion (A): The thermal efficiency of Brayton cycle with regenerati...
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Assertion (A): The thermal efficiency of Brayton cycle with regenerati...
Assertion: The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases.
Reason: As the compression ratio of compressor increases, the range of temperature in the regenerator decreases and the amount of heat recovered reduces.
Explanation:
The Brayton cycle is a thermodynamic cycle that describes the operation of a gas turbine engine. It consists of four processes: compression, combustion, expansion, and exhaust. The cycle is often used in power generation and aviation applications.
Brayton Cycle:
1. Compression: In this process, the working fluid (usually air) is compressed by the compressor to increase its pressure and temperature.
2. Combustion: The compressed air is mixed with fuel and combusted in the combustion chamber. This increases the temperature and pressure of the working fluid.
3. Expansion: The high-pressure and high-temperature working fluid expands through the turbine, producing mechanical work.
4. Exhaust: The expanded working fluid is then exhausted from the turbine, and some of the energy is recovered through a heat exchanger called a regenerator.
Thermal Efficiency:
The thermal efficiency of a Brayton cycle is defined as the ratio of the net work output to the heat input. It is a measure of how efficiently the cycle converts heat energy into useful work.
Effect of Compression Ratio on Thermal Efficiency:
The compression ratio is defined as the ratio of the maximum pressure to the minimum pressure during the cycle. Increasing the compression ratio increases the temperature and pressure of the working fluid after compression. This increases the net work output of the cycle.
However, as the compression ratio increases, the temperature difference across the regenerator decreases. The regenerator is a heat exchanger that recovers heat from the exhaust gases and transfers it to the compressed air before combustion. The reduced temperature range in the regenerator leads to a decrease in the amount of heat recovered.
Conclusion:
Therefore, it can be concluded that the assertion is true. The thermal efficiency of a Brayton cycle with regeneration decreases as the compression ratio increases because the reduced temperature range in the regenerator results in a decrease in the amount of heat recovered.
Reason: As the compression ratio of compressor increases, the range of temperature in the regenerator decreases and the amount of heat recovered reduces.
Explanation:
The Brayton cycle is a thermodynamic cycle that describes the operation of a gas turbine engine. It consists of four processes: compression, combustion, expansion, and exhaust. The cycle is often used in power generation and aviation applications.
Brayton Cycle:
1. Compression: In this process, the working fluid (usually air) is compressed by the compressor to increase its pressure and temperature.
2. Combustion: The compressed air is mixed with fuel and combusted in the combustion chamber. This increases the temperature and pressure of the working fluid.
3. Expansion: The high-pressure and high-temperature working fluid expands through the turbine, producing mechanical work.
4. Exhaust: The expanded working fluid is then exhausted from the turbine, and some of the energy is recovered through a heat exchanger called a regenerator.
Thermal Efficiency:
The thermal efficiency of a Brayton cycle is defined as the ratio of the net work output to the heat input. It is a measure of how efficiently the cycle converts heat energy into useful work.
Effect of Compression Ratio on Thermal Efficiency:
The compression ratio is defined as the ratio of the maximum pressure to the minimum pressure during the cycle. Increasing the compression ratio increases the temperature and pressure of the working fluid after compression. This increases the net work output of the cycle.
However, as the compression ratio increases, the temperature difference across the regenerator decreases. The regenerator is a heat exchanger that recovers heat from the exhaust gases and transfers it to the compressed air before combustion. The reduced temperature range in the regenerator leads to a decrease in the amount of heat recovered.
Conclusion:
Therefore, it can be concluded that the assertion is true. The thermal efficiency of a Brayton cycle with regeneration decreases as the compression ratio increases because the reduced temperature range in the regenerator results in a decrease in the amount of heat recovered.
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Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. Can you explain this answer?
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Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. 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 Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. 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 Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. Can you explain this answer?.
Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. 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 Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. 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 Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. Can you explain this answer?.
Solutions for Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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ample number of questions to practice Assertion (A): The thermal efficiency of Brayton cycle with regeneration decreases as the compressor ratio increases. Reason (R): As the compression ratio of compressor increases, the range oftemperature in the regenerator decreases and the amount of heat recovered reduces.a) Both A and R are individually true and R is the correct explanation of Ab) Both A and R are individually true but R is not the correct explanation of Ac) A is true but R is falsed) A is false but R is true Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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