AN OVERVIEW OF HVACSIM , A DYNAMIC BUILDING/HVAC/CONTOOL SYSTEMS SIMULATION PROGRAM

摘要

In an effort to understand the dynamic interactions between a building shell, an HVAC system, and building controls, a non-proprietary building system simulation program called HVACSIM+ which stands for HVAC SIMulation PLUS other systems, has been developed at the National Bureau of Standards (NBS). HVACSIM+ consists of a main simulation program, a library of HVAC system component models, a building shell model, and an interactive front end program. The main simulation program employs a hierachical, modular approach and advanced equation solving techniques to perform dynamic simulations of building/HVAC/ control systems. In the building shell model, a fixed time step, selected by the user, is employed, while a variable time step approach is used in the HVAC and control systems portion of a simulation. This paper presents the overall architecture of HVACSIM the main simulation program, numerical methods used, HVAC component models, the building shell model, and the results of a sample simulation.