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For a given value of compression ratio, efficiency of Otto cycle
- a)decreases with increase in compression ratio
- b)increases with increase in compression ratio
- c)is not affected
- d)none of the above
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
For a given value of compression ratio, efficiency of Otto cyclea)decr...
Air standard efficiency of Otto cycle
Hence thermal efficiency or air standard efficiency of Otto cycle is proportional to the compression ratio.
Most Upvoted Answer
For a given value of compression ratio, efficiency of Otto cyclea)decr...
Explanation:
The efficiency of an Otto cycle is given by the equation:
η = 1 - (1/r)^(γ-1)
where r is the compression ratio and γ is the ratio of specific heats.
Effect of compression ratio on efficiency:
- As compression ratio increases, the amount of heat added during the combustion process remains constant.
- However, the amount of heat rejected during the exhaust process decreases.
- This leads to an increase in the net work done during the cycle, which in turn increases the efficiency.
- Thus, efficiency of Otto cycle increases with increase in compression ratio.
Therefore, the correct answer is option 'B'.
The efficiency of an Otto cycle is given by the equation:
η = 1 - (1/r)^(γ-1)
where r is the compression ratio and γ is the ratio of specific heats.
Effect of compression ratio on efficiency:
- As compression ratio increases, the amount of heat added during the combustion process remains constant.
- However, the amount of heat rejected during the exhaust process decreases.
- This leads to an increase in the net work done during the cycle, which in turn increases the efficiency.
- Thus, efficiency of Otto cycle increases with increase in compression ratio.
Therefore, the correct answer is option 'B'.
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For a given value of compression ratio, efficiency of Otto cyclea)decreases with increase in compression ratiob)increases with increase in compression ratioc)is not affectedd)none of the aboveCorrect answer is option 'B'. Can you explain this answer?
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