a thermodynamic device
the capacity of a thermal component, which is defined differently depending on the type of the component
the attribute indicating that the control volume is connected to an active external heat source
the efficiency of a thermal component, which is defined differently depending on the type of component
(Forall (?Self ?Time) (<=> (Active ?Time Thermal-Component ?Self) (And (Thermal-Component ?Self) (Active ?Time Thermal-System ?Self)))) (=> (Thermal-Component ?Self) (Quantity.Dimension (Efficiency ?Self) Dimensionless))