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For dual combustion cycle for fixed value of heat addition and compression ratio
- a)mep will be greater with increase in rp and decrease in rc
- b)mep will be greater with decrease in rp and decrease in rc
- c)mep remain the same with increase in rp and decrease in rc
- d)none of the above
Correct answer is option 'A'. Can you explain this answer?
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For dual combustion cycle for fixed value of heat addition and compres...
Correct answer is A. mep will be greater with increase in rp and decrease in rc
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Dual Combustion Cycle and MEP
Dual combustion cycle is a type of internal combustion engine cycle where combustion occurs in two stages. It is used in engines to increase thermal efficiency and reduce emissions. In this cycle, there are two heat addition processes, one at a constant volume and the other at a constant pressure. The cycle consists of four processes:
1. Isentropic compression
2. Heat addition at constant volume
3. Heat addition at constant pressure
4. Isentropic expansion
MEP and Compression Ratio
Mean effective pressure (MEP) is the average pressure acting on the piston during the power stroke of an engine cycle. It is an important performance parameter for internal combustion engines. The compression ratio (rc) is defined as the ratio of the cylinder volume at the end of compression to the cylinder volume at the end of the clearance volume.
Effect of rp on MEP
When the heat addition is fixed, the MEP of a dual combustion cycle increases with an increase in the pressure ratio (rp). This is because an increase in rp increases the pressure at the end of the compression stroke, which increases the temperature of the working fluid. This results in a higher thermal efficiency, which in turn increases the MEP.
Effect of rcb on MEP
When the heat addition is fixed, the MEP of a dual combustion cycle decreases with a decrease in the compression ratio (rcb). This is because a decrease in rcb reduces the temperature at the end of the compression stroke, which reduces the thermal efficiency. This results in a lower MEP.
Conclusion
In conclusion, the MEP of a dual combustion cycle is affected by the pressure ratio and compression ratio. An increase in rp leads to an increase in MEP, while a decrease in rcb leads to a decrease in MEP. Therefore, option A is the correct answer.
Dual combustion cycle is a type of internal combustion engine cycle where combustion occurs in two stages. It is used in engines to increase thermal efficiency and reduce emissions. In this cycle, there are two heat addition processes, one at a constant volume and the other at a constant pressure. The cycle consists of four processes:
1. Isentropic compression
2. Heat addition at constant volume
3. Heat addition at constant pressure
4. Isentropic expansion
MEP and Compression Ratio
Mean effective pressure (MEP) is the average pressure acting on the piston during the power stroke of an engine cycle. It is an important performance parameter for internal combustion engines. The compression ratio (rc) is defined as the ratio of the cylinder volume at the end of compression to the cylinder volume at the end of the clearance volume.
Effect of rp on MEP
When the heat addition is fixed, the MEP of a dual combustion cycle increases with an increase in the pressure ratio (rp). This is because an increase in rp increases the pressure at the end of the compression stroke, which increases the temperature of the working fluid. This results in a higher thermal efficiency, which in turn increases the MEP.
Effect of rcb on MEP
When the heat addition is fixed, the MEP of a dual combustion cycle decreases with a decrease in the compression ratio (rcb). This is because a decrease in rcb reduces the temperature at the end of the compression stroke, which reduces the thermal efficiency. This results in a lower MEP.
Conclusion
In conclusion, the MEP of a dual combustion cycle is affected by the pressure ratio and compression ratio. An increase in rp leads to an increase in MEP, while a decrease in rcb leads to a decrease in MEP. Therefore, option A is the correct answer.
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For dual combustion cycle for fixed value of heat addition and compression ratioa)mep will be greater with increase in rp and decrease in rcb)mep will be greater with decrease in rp and decrease in rcc)mep remain the same with increase in rp and decrease in rcd)none of the aboveCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about For dual combustion cycle for fixed value of heat addition and compression ratioa)mep will be greater with increase in rp and decrease in rcb)mep will be greater with decrease in rp and decrease in rcc)mep remain the same with increase in rp and decrease in rcd)none of the aboveCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For dual combustion cycle for fixed value of heat addition and compression ratioa)mep will be greater with increase in rp and decrease in rcb)mep will be greater with decrease in rp and decrease in rcc)mep remain the same with increase in rp and decrease in rcd)none of the aboveCorrect answer is option 'A'. Can you explain this answer?.
For dual combustion cycle for fixed value of heat addition and compression ratioa)mep will be greater with increase in rp and decrease in rcb)mep will be greater with decrease in rp and decrease in rcc)mep remain the same with increase in rp and decrease in rcd)none of the aboveCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about For dual combustion cycle for fixed value of heat addition and compression ratioa)mep will be greater with increase in rp and decrease in rcb)mep will be greater with decrease in rp and decrease in rcc)mep remain the same with increase in rp and decrease in rcd)none of the aboveCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For dual combustion cycle for fixed value of heat addition and compression ratioa)mep will be greater with increase in rp and decrease in rcb)mep will be greater with decrease in rp and decrease in rcc)mep remain the same with increase in rp and decrease in rcd)none of the aboveCorrect answer is option 'A'. Can you explain this answer?.
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