the system consisting of a boiler, an associated control-volume, and a ?? process.
the boiler
the control volume associated with the boiler in the boiler-system
the heat transfer process in the boiler
the water flowing through the boiler
(Forall (?Self ?Time)
(<=> (Active ?Time Boiler-System ?Self)
(And (Boiler-System ?Self)
(Active ?Time System-Model ?Self))))
(=> (Boiler-System ?Self)
(And (Cv-Component (Blr-Cv ?Self) (Blr ?Self))
(Component-Cv (Blr ?Self) (Blr-Cv ?Self))
(Process-Cv (Htfr-Prcs ?Self) (Blr-Cv ?Self))
(Substance-In (Blr-Cv ?Self) (Water-In-Blr ?Self))
(Substance-In (Inlet-Stream (Blr-Cv ?Self))
(Water-In-Blr ?Self))
(Substance-In (Outlet-Stream (Blr-Cv ?Self))
(Water-In-Blr ?Self))))