Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines - Discussion

Discussion Forum : Compressors, Gas Dynamics and Gas Turbines - Section 2 (Q.No. 3)
3.
In a single stage, single acting reciprocating air compressor, without clearance, the workdone on the air during isentropic compression is __________ the heat required to raise the temperature of air from T1 to T2 at a constant pressure.
equal to
less than
greater than
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

Ameen said:   5 years ago
The energy stored in gas to raise the temperature when the heat is called internal energy, right?

In the isentropic process, change in heat dQ will be zero.

So, according to the first law of thermodynamics, work done will be equal to the change in internal energy. (dQ=dU+dW).

Arun said:   6 years ago
Please explain in detail.

Ankit said:   6 years ago
It means work given by system = given heat.

It will violate the second law of thermodynamics.

Ramachandra h c said:   7 years ago
Because of the compressing of air makes changes the Condition compressed air in terms of temperature V decrease to increases of T.

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