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On March 30, 2017, LBNL released version 4.0.0 of Modelica Buildings Library including new models for district energy systems and fast house models. SBS Lab researchers Yangyang Fu and Wei Tian contributed to this new version.

This version contains the following major additions:

• Buildings.Experimental.DistrictHeatingCooling with models for district heating and cooling with bi-directional flow in the distribution pipes.
• Buildings.Fluid.FMI.Adaptors and Buildings.Fluid.FMI.ExportContainers, which allow export of HVAC systems and of thermal zones as Functional Mockup Units.
• Buildings.Fluid.HeatExchangers.ActiveBeams, with active beams for cooling and heating.
• Buildings.Fluid.HeatExchangers.DXCoils.WaterCooled, with water-cooled direct expansion cooling coils.
• Buildings.ThermalZones.ReducedOrder, with reduced order models of thermal zones based on VDI 6007 that are suitable for district energy simulation.
• The models Buildings.HeatTransfer.Conduction.SingleLayer, Buildings.HeatTransfer.Conduction.MultiLayer, and Buildings.HeatTransfer.Windows.Window have been refactored to add the option to place a state at the surface of a construction. This leads in many examples that use the room model to a 20% to 40% faster simulation.
• The models Buildings.Fluid.HeatPumps.ReciprocatingWaterToWater and Buildings.Fluid.HeatPumps.ScrollWaterToWater have been added.

This release also improves various existing models. For a detailed list of changes, see http://simulationresearch.lbl.gov/modelica/releases/v4.0.0/help/Buildings_UsersGuide_ReleaseNotes.html#Buildings.UsersGuide.ReleaseNotes.Version_4_0_0.

For more information and download, visit http://simulationresearch.lbl.gov/modelica/.