A throttling process is a thermodynamic process, in which the enthalpy of the gas or medium remains constant (h = const). In fact, the throttling process is one of isenthalpic processes. ... On the other the throttling process cannot be isentropic, it is a fundamentally irreversible process.

Why throttling is an isenthalpic process?

In the throttling process the down stream pressure is always less than the upstream pressure . Therefore, whenever a real gas is subjected to throttling, the temperature of the gas decreases if the initial state lies in the region to the left of the isenthalpic curve.

Why throttling is an irreversible process?

Before that let's discuss the throttling process uses and its real life examples. Throttling process is a thermodynamic process which is used to reduce or decrease the pressure of a fluid. In this process a liquid having high pressure is converted into low pressure fluid. ... So the process can't be reversible.