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Mechanical Engineering - Thermodynamics - Discussion

Discussion Forum : Thermodynamics - Section 4 (Q.No. 37)
Thermodynamics
37.
The efficiency of Otto cycle depends upon the specific heats of the working substance.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
17 comments Page 1 of 2.
Joy said:   6 years ago
The efficiency of Otto cycle depends only on compression ratio.

Because the derivation is carried out by taking an assumption that specific heats (Cp and Cv) are constant.

Hence, the answer should be B.
(3)
Biswajit said:   5 years ago
For different diatomic molecules, specific heat may vary but gamma remains constant. Which means they have same efficiency even if their specific heats are different.
Manu said:   8 years ago
Actually specific heats depends on gamma and R. Gamma depends on molecular structure. R depends on molecular weight. So answer B can be correct.
Aman said:   5 years ago
As For otto cycle, Air is taken as standard fuel, so gamma becomes constant. That is why efficiency depends on compression ratio only.
(1)
Anki said:   6 years ago
Gamma is Cp/Cv.

It Means the ratio of specific heat at constant pressure to specific heat at constant volume.
Ronak said:   1 decade ago
Efficiency is depends upon gema which obtained by Cp/Cv so basically it depends upon specific heats or not?
Karan said:   9 years ago
Efficiency of otto cycle depends upon compression ratio and specific heat of the material.
N K Dhuva said:   7 years ago
As per the formula of efficiency for the Otto cycle answer should be A "yes".
Sandip said:   5 years ago
@Aman.

Thanks for such a type of explanation and clearing our doubt.
Kakar said:   8 years ago
The efficiency of Otto cycle depends upon the compression ratio.
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