HVACSIM+

Simulation model of a building HVAC (heating, ventilation, and air-conditioning ) system plus HVAC controls, the building shell, the heating/cooling plant, and energy management and control system (EMCS) algorithms. The main program of HVACSIM+ (HVAC SIMulation PLUS other systems employs a hierarchical, modular approach and advanced equation solving techniques to perform dynamic simulations of building/HVAC/control systems. The modular approach is based upon the methodology used in the TRNSYS program.

Keywords

HVAC equipment, systems, controls, EMCS, complex systems

Validation/Testing

N/A

Expertise Required

High level of computer literacy.

Users

More than 100.

Audience

Building technology researchers, graduate schools, consultants.

Input

Building system component model configuration, simulation setup work file, boundary data file, and simulation control data. Weather data and thermal property data of building shell materials are also required, when building shells are included in a simulation.

Output

User-designed reports.

Computer Platform

PC-compatible, with 640 kilobytes of RAM and math coprocessor.

Programming Language

Fortran 95

Strengths

Dynamic response using variable time-steps; flexibility of model setup; interactive simulation model generation; simultaneous non-linear equation solving; stiff ordinary differential equation handling.

Weaknesses

High level of user computer literacy required; long calculation time when solving simultaneous equations.

Contact

Company:

National Institute of Standards and Technology

Address:

Building Environment Division
100 Bureau Drive
Gaithersburg, Maryland 20899-8631
United States

Telephone:

+1 (301) 975-6521

Facsimile:

+1 (301) 990-8973

E-mail:

Michael.Galler@nist.gov

Website:

http://www.nist.gov/el

Availability

Free of charge to non-profit organizations. Software and manual can be obtained from technical contact. Version 20 released in early 2009.