4209 -- Theoretical Basis of Primitive Part Modeling PDF

At the present time, the simulation of buildings and their environmental control systems is enjoying growing acceptance by practitioners worldwide. At the same time, these same programs possess internal structures and modeling approaches that will restrict future extensibility in response to growing user expectations. This situation is particularly problematic in relation to the modeling of HVAC systems, where inflexible component algorithms will restrict applications to standard and conventional system configurations. One reaction to this issue is to move toward a process-oriented representation of the HVAC component models. In this approach, a library of "primitive parts" (PP) is established where each PP describes (mathematically) an elementary heat, mass, or mixed transfer process. HVAC system component models may then be synthesized at simulation time from appropriate PP combinations. This paper explains the PP approach and illustrates its application to practical problems.

Units: SI