Open source library for building and district energy and control systems

Modelica system model

Partial view of an implementation of a variable air volume flow system.


Modelica Buildings Library training at the American Modelica Conference
Modelica Buildings library 7.0.0 released
Modelica Buildings library 6.0.0 released

The Modelica Buildings library is a free open-source library with dynamic simulation models for building and district energy and control systems. The library contains models for

  • HVAC systems,
  • controls,
  • heat transfer among rooms and the outside,
  • multizone airflow, including natural ventilation and contaminant transport,
  • single-zone computational fluid dynamics coupled to heat transfer and HVAC systems,
  • data-driven load prediction for demand response applications, and
  • electrical DC and AC systems with two- or three-phases that can be balanced and unbalanced.

The primary use of the library is for flexible and fast modeling to accelerate innovation leading to cost-effective very low energy systems for new and existing buildings. The library is particularly suited for

  • rapid prototyping of new building and district energy systems,
  • design and analysis of non-conventional energy and control systems,
  • analysis of the operation of existing building systems,
  • development, specification, verification and deployment of building controls within a model-based design process, and
  • reuse of models during operation for functional testing, for verification of control sequences, for energy-minimizing controls, fault detection and diagnostics.

Projects that use this library include:

All development is open-source and we welcome contributions.

The models are available under the following open-source license.