Isentropic Process
- Isentropic process: entropy is a constant, Ds=0. A reversible, adiabatic process is always isentropic since no entropy generation due to irreversibilities (sgen=0) and no change of entropy due to heat transfer (ds=?Q/T=0).
- The reverse is not always true: An isentropic process is not necessary a reversible, adiabatic process. Why?
- Carnot cycle consists of two isentropic processes: reversible, adiabatic compression and expansion plus two isothermal processes.