Article | REF: BE9518 V1

Heat exchangers - Heat transfer enhancement

Authors: Philippe BANDELIER, Nadia CANEY, Zoé MINVIELLE

Publication date: July 10, 2014, Review date: April 26, 2021

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2. Intensification of single-phase forced convection exchanges (liquid or gas)

Numerous intensification techniques can be applied to flows consisting of a single liquid or gas phase. This section describes the main techniques and the associated exchange and friction loss laws. We also explain the conditions under which these laws are valid, which are generally expressed in terms of dimensionless numbers characteristic of operating or geometric parameters.

Several intensification mechanisms are implemented with improved tube, plate or fin geometries (table 1 ):

  • In laminar flow, it is advantageous to encourage material transfer from the exchange wall to the core of the flow and vice versa. This obviously improves heat transfer. This can be achieved by using channels with changes in direction (corrugated fins, corrugated plates) or suitable...

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Intensification of single-phase forced convection exchanges (liquid or gas)