Cooling system design

One-dimensional system simulation tools are used for designing cooling systems. The cooling system is represented as a network using numerous parts, such as pipes, manifolds, junctions, pumps and heat sources. System simulation tools of this kind thereby allow specific conclusions to be drawn about the system behavior. Here, the route can be taken into consideration by mapping the standardized or customized driving cycles, taking the respective ambient conditions into account. 

 

At FKFS / IVK, a special simulation package has been developed, the TheFaMoS (Thermisches Fahrzeugmodell Stuttgart, or the Stuttgart thermal vehicle model), which has an integrated engine model. Thanks to TheFaMoS, conclusions can be drawn about the performance of the cooling system independent of the vehicle measurements, even in early phases of development, and this can be optimized with respect to various aspects, such as the warm-up behavior.

Illustration of a thermal management system as a network in the Flowmaster® system simulation tool
Illustration of a thermal management system as a network in the Flowmaster® system simulation tool

Accompanying measurements are carried out at FKFS in the institute‘s own thermal wind tunnel. Individual parts and entire systems can be examined and optimized there, both at constant operating points as well as in driving cycles. The measurement techniques employed include temperature, pressure and volumetric flow measurements of all operating media.

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