[Bldg-sim] Modelica Buildings Library versions 8.0.0 with built-in EnergyPlus coupling, and version 7.0.1 have been released

Michael Wetter mwetter at lbl.gov
Wed Jun 9 06:49:39 PDT 2021

LBNL released the Modelica Buildings Library versions 8.0.0 and 7.0.1.

*Version 8.0.0*

Version 8.0.0  is a major release that contains the first version of the
Spawn of EnergyPlus coupling that has been developed by LBNL and NREL in
collaboration with Modelon and Objexx Engineering.

The following major changes have been done in Version 8.0.0

   - The package Buildings.ThermalZones.EnergyPlus
   the first version of the Spawn of EnergyPlus coupling that is being
   developed at lbl-srg.github.io/soep. The Spawn coupling allows to model
   HVAC and controls in Modelica, and graphically connect to EnergyPlus models
   for thermal zones, schedules EMS actuators and output variables. This
   allows for example to model HVAC systems, HVAC controls and controls for
   active facade systems in Modelica, and use the EnergyPlus envelope model to
   simulate heat transfer through the building envelope, including the heat
   and light transmission through the windows for the current control signal
   of the active shade.
   - The  package Buildings.Experimental.DHC
    contains models for district heating and cooling systems that are being
   developed for the URBANopt District Energy System software.
   - The new media Buildings.Media.Antifreeze.PropyleneGlycolWater
   modeling of propylene-glycol water mixtures.
   - A new cooling coil model
   been added. This model is applicable for fully-dry, partially-wet, and
   fully-wet regimes. In contrast to
   to Buildings.Fluid.HeatExchangers.WetCoilDiscretized
   this model uses the epsilon-NTU relationship rather than a spatial
   discretization of the coil. This leads to fewer state variables and
   generally to a faster simulation.
   - New simplified door models for bi-directional air exchange between
   thermal zones are implemented in Buildings.Airflow.Multizone
   - Various other models have been improved or added, in particular for
   modeling of control sequences using the Control Description Language that
   has been developed in the OpenBuildingControl project at obc.lbl.gov

For a detailed list of changes in version 8.0.0, see the 8.0.0 release

*Version 7.0.1*

Version 7.0.1 is a bug fix release that is compatible with 7.0.0.

The following changes have been done:

   - Corrected memory violation on Windows for weather data file with long
   header lines.
   - Corrected various misplaced, or missing, declarations of the "each"
   - Corrected access to protected classes.
   - Reformulated replaceable class to avoid access of components that are
   not in the constraining type.
   - Added missing parameter declarations for records.

For a detailed list of changes in version 7.0.1, see the 7.0.1 release

Both versions have been tested with Dymola 2021 and 2022, JModelica
(revision 14023), and OPTIMICA (revision OCT-stable-r12473_JM-r14295).

For download, go to simulationresearch.lbl.gov/modelica
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