The Buildings library is a free library for modeling building energy and control systems. Many models are based on models from the package Modelica.Fluid and use the same ports to ensure compatibility with the Modelica Standard Library.

The figure below shows a section of the schematic view of the model Buildings.Examples.HydronicHeating. In the lower part of the figure, there is a dynamic model of a boiler, a pump and a stratified energy storage tank. Based on the temperatures of the storage tank, a finite state machine switches the boiler and its pump on and off. The heat distribution is done using a hydronic heating system with a three way valve and a pump with variable revolutions. The upper right hand corner shows a room model that is connected to a radiator whose flow is controlled by a thermostatic valve.


The web page for this library is http://simulationresearch.lbl.gov/modelica, and the development page is https://github.com/lbl-srg/modelica-buildings. Contributions to further advance the library are welcomed. Contributions may not only be in the form of model development, but also through model use, model testing, requirements definition or providing feedback regarding the model applicability to solve specific problems.


Name Description
UsersGuide User's Guide
Air Package with models that are configured to use with air-based HVAC systems
Airflow Package to compute airflow and contaminant transport between rooms
Applications Package with models for different application domains
BoundaryConditions Package with models for boundary conditions
Controls Package with models for controls
Electrical Package with models for electrical systems
Fluid Package with models for fluid flow systems
HeatTransfer Package with heat transfer models
Media Package with medium models
Occupants Package with models to simulate building occupant behaviors
ThermalZones Models for BuildingPhysics
Utilities Package with utility functions such as for I/O
Types Package with type definitions
Examples Collection of models that illustrate model use and test models
Experimental Package with experimental models
BaseClasses Package with base classes for the Buildings library
Obsolete Classes that are obsolete and will be removed in later versions

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