the system consisting of a condensor, an associated control-volume, and a heat-transfer process.
the heat transfer process in the condensor
the control volume associated with the condensor in the condensor-with-heat-transfer-system
(Forall (?Self ?Time)
(<=> (Active ?Time Condensor-With-Heat-Transfer-System ?Self)
(And (Condensor-With-Heat-Transfer-System ?Self)
(Active ?Time System-With-Condensor ?Self))))