paraffin wax deposition and fouling
paraffin wax deposition and fouling
paraffin wax deposition and fouling
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— 29 —<br />
-.. I 5JDY OP OUhl::c BY hOLUTIONd OF PAPLFFIN WAX IN<br />
EEBO<br />
F1<br />
Introduction<br />
The e;ooerimeutai results obtained by<br />
1;iaer<br />
1)<br />
raised the<br />
following main cuestions:<br />
Uas the exoected asymototic heat<br />
trnsfer<br />
resistance reached in a few minutes, not detectable by the arparatuc,<br />
or would<br />
it<br />
be reached<br />
if<br />
experimental times were extencied<br />
Also,<br />
were the measured fluctuations in the heat transfer resistance real,<br />
or caused by some external factors, rossibly the mechanical desin of<br />
the anoaratus?<br />
Section 4 deals with exoerimental work carried out in an<br />
endeavour to clarify some of the above questions.<br />
.2<br />
Dodificatioss of Inoaratus<br />
All the exeerinenta<br />
work on <strong>fouling</strong> by solutions of<br />
rarafin<br />
<strong>wax</strong> in kerosene<br />
1<br />
was carried out in the same aroaratus as used by<br />
Walker<br />
,<br />
with three moazficatons.<br />
u<br />
tnermometers were put in uan walea roccets, to :orevent<br />
accidents<br />
if<br />
one of the mercury in glass thermometers broke.<br />
The inside <strong>and</strong> outside (the building) steam tracings were<br />
connected such as to allow seoarate arrlication.<br />
:<br />
this way,<br />
the outside steam tracings could ‘cc<br />
kert on during experiments,<br />
thus creating a thermal barrier <strong>and</strong> minimizing the effect of ambient<br />
temuerature fuctuations on the solution bulk teaterature.<br />
This<br />
was acne Decause an examana;aon o: tue exoeramenta<br />
resu_ts<br />
ootaanea cy<br />
;auer<br />
insacatea some reatioasuar cetween tue amient<br />
temperature sac. tue<br />
souion<br />
oul ter.nDera;ure.<br />
tuis :ere true,<br />
tue :uctuataons an tue<br />
eat<br />
trans:er resastance comuc. Ce rea:-zo:ceo<br />
by ambient teuterature fluctuations.<br />
lAo<br />
final modification c:as to move tue ;ueruastcr, coutuc__ang<br />
the solution bul: tearerature, from the discharge .siae of tue<br />
centrifugal<br />
ru.o<br />
mac riace at near tue stem:.: oca_ an tac s.orage<br />
tear. unto mus acme cecauce usun__y, cetter ocr.crc_ :au_ cc
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