the system consisting of a turbine, an associated control-volume, and a throttling process.
the expansion process
the turbine
the control volume associated with the extraction turbine in the extraction-turbine-system
(Forall (?Self ?Time) (<=> (Active ?Time Extraction-Turbine-System ?Self) (And (Extraction-Turbine-System ?Self) (Active ?Time System-Model ?Self)))) (=> (Extraction-Turbine-System ?Self) (And (Cv-Component (Xtbn-Cv ?Self) (Xtbn ?Self)) (Component-Cv (Xtbn ?Self) (Xtbn-Cv ?Self)) (Process-Cv (Expsn-Prcs ?Self) (Xtbn-Cv ?Self))))