paraffin wax deposition and fouling

and time, fouling factors are usually published independently
surfaces.
rrocess variables such as velocity, temperature, concentration
Though being recognised that fouling depends on the various
1.4 Auproach of Thesis
as crud” deposits, for example.
(6) Biological fouling where some form of life grows on transfer
:urtner paraf:n wax aeosition and fouling.
tne recent wor carried ou at Brmzngnam Lr.lverslty to stucy
:uctuatec. ac.u; an n:tal vajue. The present tness cescrices
asyartotic au’roacn anc. tne neat transzer resistance unexpec;em_y
not show the expected time dependence. There was no apparent
The model system studied, paraffin wax in kerosene, however, did
fouling at different flowrates, concentrations and temperatures.
heat exchangers was concerned with the time characteristics of
The early work(1) at Birmingham University into fouling of
performances.
for predicting economic cleaning cycles and transient thermal
with time. This time deendence makes fouling studies imrortant
fouling resistances of most exchangers increase asymptotically
between, for examle, the amount deposited and velocity, the
Tnile many types of fouling show different relationships
material balance
and are usually based on a general deposition and removal
are almost as numerous as the fouling situations studied(1 9)
constructing, largely empirical, fouling models. These models
concerned with isolating the effects of different variables and
of these variables. Research into fouling has therefore been
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