The Modelica Buildings Library 10.0.0 and 9.1.1, and BuildingsPy 5.0.0,
were released on September 5, 2023.

The Modelica Buildings Library version 9.1.1 is backward compatible with
9.1.0, while version 10.0.0 contains various new models.
*The following major changes have been done for the Modelica Buildings
Library 10.0.0:*

-

A package with configurable template models for variable air volume flow
systems with control based on ASHRAE Guideline 36 has been added to the
package *Buildings.Templates*

.
-

Reduced order building envelope models based on the ISO 13790:2008
Standard have been added. This allows modeling of building envelope heat
transfer either with a detailed Modelica multizone model (
*Buildings.ThermalZones.Detailed*
),
with EnergyPlus via the Spawn coupling (
*Buildings.ThermalZones.EnergyPlus_9_6_0*
),
or with reduced order models based on ISO 13790 (
*Buildings.ThermalZones.ISO13790*
)
or based on VDI 6007 (*Buildings.ThermalZones.ReducedOrder*

).
-

Various models for district energy systems have been added to the
package *Buildings.Experimental*
.
This package includes models for
-

combined heating and cooling district energy systems that operate
near ambient temperature (sometimes called 5th generation district energy
systems),
-

Energy Transfer Stations (ETS) with all electric plants with heat
recovery chillers,
-

ETS with multiple heat pumps (heat recovery as well as air-source
heat pumps) and storage, i.e., the so-called Time-Independent Energy
Recovery (TIER) plant in (
*Buildings.Experimental.DHC.Plants.Combined.AllElectricCWStorage*

),
-

direct and indirect ETS for heating or for cooling, and
-

district steam systems.
-

A package with all major hydronic configurations that are encountered in
heating and cooling systems has been added in
*Buildings.Fluid.HydronicConfigurations*
.
This package also includes automatic sizing of control valves to obtain
suitable valve authority.
-

The fan and pump models have been revised, and can now be configured to
compute the part load efficiency based on the Euler number.
-

Various new elementary control blocks have been added to the
*Buildings.Controls.OBC.CDL*

package
to provide a reference implementation of the ASHRAE Standard 231P *Control
Description Language* that is currently being developed. See also
*obc.lbl.gov* .

The library has been tested with Dymola 2023x, OpenModelica 1.22.0-dev
(41-g8a5b18f-1), OPTIMICA 1.43.4 and recent versions of Impact.

For a detailed list of changes to Buildings 10.0.0 and 9.1.1, see
*https://simulationresearch.lbl.gov/modelica/releases/v10.0.0/help/Buildings_UsersGuide_ReleaseNotes.html*

.
*The following changes have been done for BuildingsPy 5.0.0:*

-

Added buildingspy.simulate.OpenModelica to support simulation with
OpenModelica, and refactored modules for simulation with Dymola and
Optimica.
-

In buildingspy/simulate/base_simulator.py, updated separator for
MODELICAPATH on Windows.
-

In buildingspy/simulate/base_simulator.py, added support for libraries
with encrypted top-level package.moe file.
-

Corrected bug in buildingspy/development/refactor.py that causes renames
to fail on Windows.
-

Corrected bug in buildingspy/development/regressiontest.py in parsing
.mos scripts with simulateModel command on multiple lines.
-

Added class buildingspy.development.simulationCompare that compares the
simulation performance across tools or git branches.
-

Refactored regression tests for Dymola to allow specifying a time out
for each tests, and set the default time out to 300 seconds.
-

Add option to exclude simulation of models from Dymola CI tests.

For more information and download of the Modelica Buildings Library and of
BuildingsPy, visit *https://simulationresearch.lbl.gov/modelica/*
.