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Multi-scale dynamics in counter-current heat exchangers

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2 Author(s)
Jogwar, S.S. ; Dept. of Chem. Eng. & Mater. Sci., Univ. of Minnesota, Minneapolis, MN, USA ; Daoutidis, Prodromos

In this paper, a class of high duty counter-current heat exchangers, which are typically used in energy integrated systems, is considered. The governing dynamic equations for such exchangers are stiff first order hyperbolic PDEs, and hence show a potential towards multi-scale dynamics. Using singular perturbations, a reduced non-stiff PDE model is derived, which captures the dynamics in the slow time scale. A simulation case study is considered to illustrate these results.

Published in:

Control and Automation, 2009. MED '09. 17th Mediterranean Conference on

Date of Conference:

24-26 June 2009