Questions regarding isentropic expansion and isenthalpic expansion
Thread Content
In actual production processes, it’s difficult to determine when an expansion should be considered isentropic or isenthalpic. I would like to ask fellow engineers: for example, in a steam ejector, as the power steam passes through the nozzle and its velocity increases, does this constitute an isentropic expansion or an isenthalpic expansion of the steam? With the same steam injector, if it is equipped with a jacket and high-pressure steam from the jacket leaks into the injector, then what type of expansion does this jacket steam undergo?
Does steam do work on the outside? The more work it does, the closer it is to isentropic behavior; conversely, adiabatic expansion with no work done at all is isenthalpic.
Entropy can be regarded as a function of disorder, and an ideal gas can be regarded as a function of temperature, by this standard.
Regarding the examples given in my question, what kind of expansion should they be considered as respectively?