Title :
Multi-scale dynamics in counter-current heat exchangers
Author :
Jogwar, Sujit S. ; Daoutidis, Prodromos
Author_Institution :
Dept. of Chem. Eng. & Mater. Sci., Univ. of Minnesota, Minneapolis, MN, USA
Abstract :
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.
Keywords :
heat exchangers; hyperbolic equations; partial differential equations; perturbation techniques; counter-current heat exchangers; dynamic equations; energy integrated systems; multiscale dynamics; singular perturbations; stiff first order hyperbolic PDE; Automatic control; Costs; Counting circuits; Equations; Heat engines; Heat recovery; Heat transfer; Steady-state; Temperature control; Virtual colonoscopy;
Conference_Titel :
Control and Automation, 2009. MED '09. 17th Mediterranean Conference on
Conference_Location :
Thessaloniki
Print_ISBN :
978-1-4244-4684-1
Electronic_ISBN :
978-1-4244-4685-8
DOI :
10.1109/MED.2009.5164534
