(Forall (?Self ?Time)
(<=> (Active ?Time Heat-Exchanger ?Self)
(And (Heat-Exchanger ?Self)
(Active ?Time Thermal-Component ?Self))))
(=> (Heat-Exchanger ?Self)
(And (Quantity.Dimension (Area ?Self) Area-Dimension)
(Quantity.Dimension (Overall-Heat-Transfer-Coefficient ?Self)
Dimensionless)
(Quantity.Dimension (Heat-Transfer-Rate ?Self)
Power-Dimension)
(Quantity.Dimension (Max-Pressure ?Self) Pressure-Dimension)
(Quantity.Dimension (Max-Temperature ?Self)
Temperature-Dimension)
(Quantity.Dimension (Max-Heat-Rate ?Self) Power-Dimension)
(Quantity.Dimension (Ideal-Heat-Rate ?Self) Power-Dimension)))