Experimental Heat Transfer of Drag Reducing Polymer Solutions in Enhanced Surface Heat Exchangers

A set of previous termexperimentalnext term tests on the effect of polymeric additives in water are presented from the point of view of friction losses and previous termheatnext termprevious termtransfernext term performance variations, in single-passage countercurrent straight-pipe previous termheatnext termprevious termexchangersnext term. The tests were performed on smooth, finned, and grooved pipes of different diameters and show that the use of previous termpolymersnext term in augmented previous termsurfacenext termprevious termheatnext termprevious termexchangersnext term is generally not advisable. However, they also confirm that thermal bus systems as a whole can take advantage of previous termdragnext term-previous termreducingnext termprevious termpolymernext termprevious termsolutionsnext term, provided that accurate trade-off analyses are performed to get the best compromise between pressure losses and global previous termheatnext termprevious termtransfernext term performance of the thermal loop.