.BuildSysPro.IBPSA.Fluid.FMI.Adaptors.ThermalZone

Information

Adaptor that can be used to connect a model of a thermal zone (with acausal ports) to input/output signals, which can be exposed in an FMI interface.

This model has a vector fluPor with dimension nPorts which can be exposed at the FMI interface for the connecting the HVAC system. These connectors contain for each fluid inlet the mass flow rate, the temperature, the water vapor mass fraction per total mass of the air (unless Medium.nXi=0), and the trace substances (unless Medium.nC=0).

The connector ports can be used to connect the model with a thermal zone. The number of connections to ports must be equal to nPorts.

Assumption and limitations

The mass flow rates at ports sum to zero, hence this model conserves mass. If the mass flow rates at fluPor do not sum to zero, then this model stops with an error.

This model does not impose any pressure, other than setting the pressure of all fluid connections to ports to be equal. The reason is that setting a pressure can lead to non-physical system models, for example if a mass flow rate is imposed and the HVAC system is connected to a model that sets a pressure boundary condition such as IBPSA.Fluid.Sources.Outside. Also, setting a pressure would make it impossible to use multiple instances of this model (one for each thermal zone) and build in Modelica an airflow network model with pressure driven mass flow rates.

The model has no pressure drop.

Typical use

See IBPSA.Fluid.FMI.ExportContainers.ThermalZone for a model that uses this model.

Contents

Name	Description
Medium	Medium in the component

Revisions

• January 18, 2019, by Jianjun Hu:
  Limited the media choice to moist air only. See #1050.
• June 29, 2016, by Michael Wetter:
  Revised implementation and documentation.
• April 27, 2016, by Thierry S. Nouidui:
  First implementation.