Modellierung thermodynamischer Phänomene
mittels Bondgraphen
Abstract
Bond graphs have become important tools for modeling in electrical and mechanical
engineering. Some authors explored their use in thermodynamics modeling, yet
these researchers predominantly used pseudo bond graphs rather than true bond
graphs and limited their work to restricted application areas only. In contrast,
this thesis presents a full conceptual approach for the modeling of thermodynamic
systems. No quasi-stationary or steady-state assumptions were used to keep the
results of this research effort as general as possible and to pave the way for
true dynamic modeling of thermodynamic phenomena away from flow equilibrium.
Following a short introduction to bond graph modeling, a general approach to a
mathematical description of convective phenomena is presented, which is then
further generalized to multi-phase and multi-element systems. The model of a
pressure cooker illustrates the presented methodology. The thermodynamic
modeling of simple chemical reactions is then discussed as a further
generalization of the modeling techniques developed in this thesis. A possible
way of implementating the models in Dymola is attached as Appendix A.
Although this thesis is written in German, parts of it were published in English
in conference proceedings. These publications are attached as Appendix B.
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Deutsche Zusammenfassung
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Last modified: September 24, 2009 -- © François Cellier