If gas volume remains constant, it can do work?

[Nuke]

Did you really think that, if the initial and final volumes of a system are the same, that is equivalent to a constant volume process in a rigid container?

Chet

The Stirling engine is a rigid container. Geometry (volume) of the container remains constant for the process, initial, during, and final, even though the piston is reciprocating. Gas density is moved from end to end.
Hence, Yes. But not on a closed system.
If gas volume remains constant, it can do work?

 

[Chestermiller]

The Stirling engine is a rigid container. Geometry (volume) of the container remains constant for the process, initial, during, and final, even though the piston is reciprocating. Gas density is moved from end to end.
Hence, Yes. But not on a closed system.
If gas volume remains constant, it can do work?

Nuke,

I think you understood the context of the OP's original question, and that he was referring to a closed system in which the volume of the system remains constant throughout the process. I also think you understand that in a stirling engine, the movement of the piston causes the volume of the closed system and the volume of the gas to change with time over each cycle. So the only thing I can conclude is either that you were trying to mislead and confuse the OP, or you were trying to show everyone how smart you think you are by bringing up this example that does not even match the context of the original question. But, it is not very smart to get into a game of words with a Mentor. I am issuing you some Warning points and am closing this thread to further responses. In the future, please use better judgement.