Variable Structure Modeling for Vehicle Refrigeration Applications

Imke Krüger; Alexandra Mehlhase; Gerhard Schmitz

Title:

Author:

Imke Krüger: Hamburg University of Technology, Department of Technical Thermodynamics, Hamburg, Germany/TU Berlin, Department of Software Engineering and Theoretical Computer Science, Berlin, Germany Alexandra Mehlhase: Hamburg University of Technology, Department of Technical Thermodynamics, Hamburg, Germany/TU Berlin, Department of Software Engineering and Theoretical Computer Science, Berlin, Germany Gerhard Schmitz: Hamburg University of Technology, Department of Technical Thermodynamics, Hamburg, Germany/TU Berlin, Department of Software Engineering and Theoretical Computer Science, Berlin, Germany

DOI:

10.3384/ecp12076927

Download:

Full text (pdf)

Year:

2012

Conference:

Proceedings of the 9th International MODELICA Conference; September 3-5; 2012; Munich; Germany

Issue:

076

Article no.:

096

Pages:

927-934

No. of pages:

Publication type:

Abstract and Fulltext

Published:

2012-11-19

ISBN:

978-91-7519-826-2

Series:

Linköping Electronic Conference Proceedings

ISSN (print):

1650-3686

ISSN (online):

1650-3740

Publisher:

Linköping University Electronic Press; Linköpings universitet

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A variable-structure approach for Modelica models is presented in this paper. Variable structure models enable the user to change the simulation model during runtime. This is not supported by common simulation environments and thus a Matlab script is used to control the run of the simulation. The script switches between the different models and sets the initial values to ensure smooth transients of the variables. The method is applied to a model of a thermal management system for Lithium ion batteries in a hybrid vehicle. In this model some components don not need to be calculated through the complete simulation time and are removed from the model through the variable-structure approach. With this approach the simulation time can be reduces while the simulation accuracy is not affected negatively

Keywords: li-ion batteries; compression cycle; simulation speed; thermal management; variable-structure model

Proceedings of the 9th International MODELICA Conference; September 3-5; 2012; Munich; Germany

Author:

Imke Krüger, Alexandra Mehlhase, Gerhard Schmitz

Title:

Variable Structure Modeling for Vehicle Refrigeration Applications

DOI:

http://dx.doi.org/10.3384/ecp12076927

References:

[1] Krüger;I. Energy Consumption Of Battery Cooling In Hybrid Electric Vehicles. In: Proceedings of 14th International Refrigeration and Air Conditioning Conference; Purdue; USA; 16-19 July 2012 (to be published).

[2] Mehlhase A. Varying the level of detail during simulation. In: Proceedings of ASIM 2011; Symposium Simulationstechnik; Winterthur; Swiss; 7-9 September 2011.

[3] Zimmer D. Equation-Based Modeling of Variable-Structure Systems. Ph.D. thesis; Swiss Federal Institute of Technology; 2010.

[4] Nytsch-Geusen; C.; Ernst; T.; Nordwig; A.; and et al. (2005). Mosilab: Development of a modelica based generic simulation tool supporting model structural dynamics. In: G. Schmitz (ed.); Proceedings of the 4th International Modelica Conference; Hamburg; March 7-8; 2005.

[5] Nilsson; H.; Giorgidze; G. (2010). Exploiting structural dynamism in Functional Hybrid Modelling for simulation of ideal diodes. In: Proceedings of the 7th EUROSIM Congress on Modelling and Simulation. Czech Technical University Publishing House; Prague; Czech Republic; 2010.

[6] Tummescheid; H.; Eborn; J.; Prölß; K.; AirConditioning - a Modelica library for dynamic simulation of AC systems; In: G. Schmitz (ed.); Proceedings of the 4th International Modelica Conference; Hamburg; March 7-8; 2005. vol. 1; p. 185-192.

[7] Pfafferoth; T.; Schmitz; G.; Modeling and transient simulation of CO2-refrigeration systems with Modelica; International Journal of Refrigeration; 2004; Vol. 24; no. 1; p.42-52. doi: 10.1016/S0140-7007(03)00098-7.

Proceedings of the 9th International MODELICA Conference; September 3-5; 2012; Munich; Germany

Author:

Imke Krüger, Alexandra Mehlhase, Gerhard Schmitz

Title:

Variable Structure Modeling for Vehicle Refrigeration Applications

DOI:

https://doi.org10.3384/ecp12076927

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