MODELICA - Heat Exchanger Library

Enables the efficient design and dimensioning of radiators and heat exchanger stacks for automotive applications. The library can be used in conjunction with the Liquid Cooling Library to accelerate the complete design of automotive thermal management systems.

Design of Heat Exchangers

The Modelica based Heat Exchanger Library contains flat tube heat exchanger models supporting several flat tube and louvered fin designs. The models take into account the effects of inhomogeneous air flow and temperature distribution with it also being possible to model the effect of heat exchanger stacking along the air flow path. The library is suitable for studying the effects of heat exchanger dimensioning and positioning on the overall performance of the cooling system. Key Features include:

  • Geometry-based heat exchanger models for system simulations
  • Captures effects of inhomogeneously distributed inlet air flow
  • Modeling of heat exchanger stacks with different heat exchanger geometries, sizes and positioning
  • Friction and hear transfer models for louvered fin designs
  • Coupling to Computational fluid dynamics (CFD) data

Automotive Thermal Management Design

The heat exchanger Library has native interfaces to the Air Conditioning, Vapor Cycle and the Liquid Cooling Libraries to accelerate the for the design of complete automotive thermal management systems. The models can also be coupled to CFD-derived boundary conditions on the air side, bridging the gap between CFD and system simulations.

Typical Example

The graphic shows a typical heat exchanger stack that consists of a single layer, horizontal air-coolant heat exchanger, which is partly covered by a double-layered vertical air-coolant heat exchanger with an obstacle in front of them partly covering both heat exchangers.

Integrate Multiple Engineering Disciplines

The Heat Exchanger Library is part of the powerful CATIA Systems Engineering solution. The library can be used with both Dymola and CATIA V6 Dynamic Behavior Modeling, either on its own or with other Modelica Libraries, to model and simulate complex systems that can span multiple engineering disciplines.


  • Significantly reduced costs due to efficient modeling and simulation of radiators and stacks
  • Geometry based heat exchanger models enable rapid system simulations
  • Native interface to the Liquid Cooling Library (LCL) for complete thermal management design
  • Developed in collaboration with customers from multiple industries
  • The dynamic effects of heat exchanger stacking can be accurately modeled and simulated.