This article aims to describe a modular system level modeling approach for the thermal behavior of an automotive cabin. The model is parameterized with geometric and physical data. At the end a set of 6 parameters is used to calibrate the model with two measurement data sets: one for a passive heat up and active pull down and one for a cold heat up. The procedure can be used as a recipe for developing own models of the same kind which may be used in integrated thermal management studies.
Boiling in vertical and horizontal pipes is a complex process defining transient and static performance of various technical applications. This work presents an extended heat transfer model which takes the complete boiling process into account. Models from the literature for the different boiling regimes are evaluated with respect to accuracy and suitability for system simulation application. A set of sub-models for each of the existing boiling phenomena is implemented and applied to the global boiling model. Special attention is paid to smooth transition between the sub-models and to numerical efficient solutions with respect to the consideration of the boiling crisis. The simulation results show good accordance with literature data.
This paper describes the content and the use of the new FluidDynamics Library which can be applied to carry out CFD simulations using Modelica as an open modelling language. Typical applications until now have been in automotive, aircraft and buildings development. In this paper a fire dynamics and smoke removal simulation is presented. These simulations are very important in the process of approving a building permission. The Fluid-Dynamics Library helps to identify promising ventilation and control setups and speeds up the simulation process significantly.
The library delivers a broad range of verified and validated correlations describing convective heat transfer and pressure loss of fluids in energy devices. These correlations are numerically optimised to provide efficient and stable transient simulations. The library also provides convective heat transfer models and flow models of most heat transfer and pressure loss correlations using the also free and open source MOD-ELICA_FLUID library [2] as thermo-hydraulic framework for system simulation.Scope, implementation concept, numerical challenges, verification and validation of the FLUIDDIS-SIPATION library will be exemplarily described (e.g. for convective heat transfer and pressure loss of twophase flow).Industrial applications for thermo-hydraulic system simulation (e.g. air distribution circuit for supplemental cooling, aircraft engine fuel feeding system) are presented using FLUIDDISSIPATION correlations implemented within MODELICA_FLUID models. A detailed documentation is available in the library itself.
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