Numerical Simulation Of Fluid Flow In A
Monolithic Exchanger Related To High
Temperature And High Pressure
Operating Conditions
Author(s)
F. Selimovic & B. Sundén
Abstract
The purpose of this work is the enhancement of performance by a new design of
monolithic heat exchangers under steady-state operating conditions. Heat
transfer phenomena and hydrodynamics have been studied and visualized by
computational fluid dynamics (CFD). Further, a simple gas distribution system
has been analyzed in purpose to find the best performance of the exchanger. To
achieve this, 3D simulations of air flow were performed. One of characteristics
of monolithic structures is the low pressure drop and high heat transfer
coefficient. This is because they operate in the laminar flow regime and have
high compactness. However, some experimental studies show that when two
fluids are introduced into monolith channels, the manifolds cause severe pressure
losses. Therefore, in this work, turbulent flow regime at low Reynolds numbers
has been investigated to find the difference and better understanding of these
structures, which are of interest in high temperature applications today. The
simulation shows that the pressure drop of the gas flow distributor is a key
parameter affecting the heat transfer in the exchanger channels.
Keywords: high temperature heat exchangers, gas flow maldistribution,
monolithic heat exchangers, computational fluid dynamics.
1 Introduction
Monolith structures are used in industry today and they are produced by
extrusion techniques. They are uni-body structures composed of interconnected
Keywords
high temperature heat exchangers, gas flow maldistribution,
monolithic heat exchangers, computational fluid dynamics.
Related Book
Other papers in this volume
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