Air Conditioning Library

The Modelica Air Conditioning Library is used  to design, analyze and optimize automotive air conditioning systems during early design stages.

It comes with both ready-to-use refrigeration cycle templates and a wide range of components to create non-standard configurations.

Predefined steady-state experiments and an interface to Microsoft Excel enable users to conduct experiments to calibrate and validate design options and component settings.  A dynamic system model provides the means for investigating charge optimization and control design.

The library can be used as an integrated part of energy management design for both conventional and hybrid vehicles by combining with libraries for electric power, batteries and powertrain. Liquid cooling models comprising heat exchangers and other coolant equipment are available as a free add-on.


  • A single model handles both transient and steady-state simulations, saving time and resources
  • Flexibility via easy-to-use templates that can be adapted for custom needs
  • Access to source code that enables users to adapt state-of-the art A/C models to their specific needs
  • Provides a wide range of refrigerants for accurate simulations and experimentation
  • Based on the Modelica open standards, the library enables model re-use and easy integration with other libraries.

Diagram of a heat pump model. The library contains detailed and flexible components and is compatible with many refrigerants.

Air conditioning system design

The Air Conditioning Library is a proven tool for air conditioning system design and virtual prototyping in the automotive and aerospace industries. The components are rapidly assembled and substituted to build and test novel systems. Control strategies can subsequently be developed either in Modelica or using your preferred tool.

System and component evaluation

A calibrated model build with the Air Conditioning Library offers new opportunities for system and component evaluation. Virtual experiments enhance system understanding and provide insight in phenomena and component interactions that can be difficult to access on a test rig.

Cabin cool-down simulation

The models in Air Conditioning are designed for dynamic simulation. They enable users to study transient behavior of air conditioning systems in the event of a quick cool-down of a passenger cabin.





Webinar (2013)

  1. Batteh, J., Gohl, J., Chandrasekar, S., Integrated Vehicle Thermal Management in Modelica, Proceedings of the 10th International Modelica Conference, March 10-12, 2014, Lund, Sweden, pp. 409-418, 2014.
  2. Shojaei, S., Robinson, S. et al., Modelling the Electric Air Conditioning System in a Commercially Available Vehicle for Energy Management Optimisation, SAE Paper 2015-01-0331.

  3. Li, P., et al., Modelica-based dynamic modeling of a chilled-water cooling coil, HVAC&R Research 16.1, pp. 35-58, 2010.

  4. Wang, Z., et al., Integrated thermal management simulation: evaluating the effect of underhood recirculation flows on AC-system performance, Proceedings of the 7th Modelica Conference, September 20-22, Como, Italy, 2009.

  5. Karim, S. and Tummescheit H., Controller Development for an Automotive AC-system using R744 as Refrigerant, Proceedings of the 6th International Modelica Conference, March 3-4, Bielefeld, Germany, pp. 477-485, 2008.

  6. Peuker, S. and Hrnjak P. S., Experimental and Modeling Investigation of Two Evaporator Automotive Air Conditioning Systems, Air Conditioning and Refrigeration Center, College of Engineering, University of Illinois at Urbana-Champaign, 2006.

  7. Tummescheit, H., et al., Air Conditioning–a Modelica library for dynamic simulation of AC systems, Proceedings of the 4th International Modelica Conference, March 7-8, Hamburg, Germany, pp.185-192, 2005.

  8. Limperich, D., et al., System simulation of automotive refrigeration cyclesProceedings of the 4th International Modelica Conference, March 7-8, Hamburg, Germany, pp.193-199, 2005.

Air Conditioning Library is a product of Modelon and is distributed by Modelon and partners worldwide.

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Product Sheet 

Release Information

The flexibility and openness of the model libraries in Dymola were a significant factor for choosing Dymola.

German automotive OEM (Audi, BMW, Daimler, Volkswagen) , about using Dymola & Air Conditioning Library