modelFloor

Information

Model of a floor that consists of five thermal zones.

The five room model is representative of one floor of the new construction medium office building for Chicago, IL, as described in the set of DOE Commercial Building Benchmarks (Deru et al, 2009). There are four perimeter zones and one core zone. The envelope thermal properties meet ASHRAE Standard 90.1-2004. The thermal room model computes transient heat conduction through walls, floors and ceilings and long-wave radiative heat exchange between surfaces. The convective heat transfer coefficient is computed based on the temperature difference between the surface and the room air. There is also a layer-by-layer short-wave radiation, long-wave radiation, convection and conduction heat transfer model for the windows. The model is similar to the Window 5 model and described in TARCOG 2006.

Each thermal zone can have air flow from the HVAC system, through leakages of the building envelope (except for the core zone) and through bi-directional air exchange through open doors that connect adjacent zones. The bi-directional air exchange is modeled based on the differences in static pressure between adjacent rooms at a reference height plus the difference in static pressure across the door height as a function of the difference in air density. Infiltration is a function of the flow imbalance of the HVAC system.

References

Deru M., K. Field, D. Studer, K. Benne, B. Griffith, P. Torcellini, M. Halverson, D. Winiarski, B. Liu, M. Rosenberg, J. Huang, M. Yazdanian, and D. Crawley. DOE commercial building research benchmarks for commercial buildings. Technical report, U.S. Department of Energy, Energy Efficiency and Renewable Energy, Office of Building Technologies, Washington, DC, 2009.

TARCOG 2006: Carli, Inc., TARCOG: Mathematical models for calculation of thermal performance of glazing systems with our without shading devices, Technical Report, Oct. 17, 2006.

Parameters

Connectors

Components

Revisions

• October 4, 2021, by Michael Wetter:
  Refactored Buildings.Examples.VAVReheat and its base classes to separate building from HVAC model.
  This is for issue #2652.
• September 16, 2021, by Michael Wetter:
  Removed parameter lat as this is now obtained from the weather data reader.
  This is for IBPSA, #1477.
• September 3, 2021, by Michael Wetter:
  Updated documentation.
  This is for issue #2600.
• April 30, 2021, by Michael Wetter:
  Reformulated replaceable class and introduced floor areas in base class to avoid access of components that are not in the constraining type.
  This is for issue #2471.
• January 23, 2020, by Milica Grahovac:
  Updated core zone geometry parameters related to room heat and mass balance.
• November 15, 2019, by Milica Grahovac:
  Added extend from a partial floor model.
• May 1, 2013, by Michael Wetter:
  Declared the parameter record to be a parameter, as declaring its elements to be parameters does not imply that the whole record has the variability of a parameter.