Heat Exchanger Library

The Modelica Heat Exchanger Library is used for heat-exchanger design and analysis. Key features involve the capabilities to achieve optimal positioning of heat-exchangers in respect to each other and to perform stacking analysis.

The library contains heat exchanger models supporting several flat-tube and louvered fin designs. Users can simulate inhomogeneous airflow, temperature distribution and heat-exchanger stacking along the airflow path.


  • Geometry-based heat exchanger models enable simulations at the systems level early in the design process, saving time and money
  • Pre-defined friction and heat-transfer models allow users to optimize louvered fin designs
  • Captures effects of in-homogeneously distributed inlet airflow for greater simulation accuracy
  • Can be coupled to CFD-derived boundary conditions on the air side, bridging the gap between CFD and system simulations
  • Enables modeling of heat exchanger stacks with different heat-exchanger geometries, sizes and positioning
  • Includes native interfaces to Air Conditioning Library, Vapor Cycle Library and Liquid Cooling Library for complete thermal management design.

Diagram of two stacked heat exchangers with partial overlap and an obstacle, which for instance can be used to study the air intake of cars or trucks.

Heat exchanger stacks

Heat exchanger stacks are a key coupling point between fluid circuits. The Heat Exchanger Library provides detailed, geometry-based models that can be stacked using a stream-tube approach for the airflow.  This preserves non-uniform conditions for each heat exchanger in the stack.

Heat exchanger models in the library accept both uniform and non-uniform airflow inputs. This formulation is efficient enough to support drive-cycle work for a reasonable number of stream tubes.

Check out the technical paper Integrated Vehicle Thermal Management in Modelica, where results from heat exchanger stack simulations support cooling pack concept assessment.

Streamtube approach and sample stack from the Heat Exchanger Library

Heat exchanger dimensioning and design

The Heat Exchanger Library, including a wide variety of heat exchanger models, is our reference tool for heat exchangers design. Testbenches are readily available, reducing both modelling time and simulation setup time.

Active grill shutters

The Heat Exchanger Library is the right tool for the development of control strategies for active grill shutters.

Heat exchangers are often the physical boundary between a fluid circuit and the ambient air. This implies that their performance affects the underlying system efficiency but also has consequences on the air side. This trade-off is most apparent in the automotive industry where a reduced air intake, by closing grill shutters, reduces the vehicle’s drag coefficient. The Heat Exchanger Library permits the study of this interaction, since the heat exchangers can be coupled to CFD results on one side and a system model on the other. 

Intercooler design

Intercoolers are a key element to improve the volumetric efficiency of combustion engines. The Heat Exchanger Library contains a wide set of application-specific models, which can be easily parameterized to represent your air-to liquid intercoolers or charge air coolers. 

The Heat Exchanger Library is used in all applications that require detailed heat exchanger models. 

  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.

Heat Exchanger Library is a product of Modelon and is distributed by Modelon and partners worldwide.

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