paraffin wax deposition and fouling

— —
.LnL:
fact that the fluctuations are not conatant, but coeend
on the concentration, flowrate rind temperature of ue paraffin
fa kerosene soluticn. sroniy suggests a real e:erirenta1
ffuct
n all tac c):Deriaental results the oror in solution oulk
teaucracure aiong a test nectzon are very small.
Ine avergae
tenjerature dror in runs 1 to 21 was, for exarnole, i.5i-C_ The
accuracy of the mercury in glass thermometers used in this work
was about which is 75 rer cent of 1.5400. The maximum
li:ey error is uner:ore acout 15 per cent.
The ogarct::mzc meai: temuerature cn.iference ifl crc experi—
- - - -. _o
menta_ wor rangen !rom acout 2p to p5 0. -n error o: J. C
therefore not affect the temperature driving force to any great
extent -
The recorcun ou:Dut iron the pressure transducer pro cacuy
cannot be read with a greater accuracy than 0.25 ffV :n run 15
where the Reynolds number is about 6000 the measured transducer
output was accut p mV.
The uotenta measurement error s taere:ore
about 20 ocr cent
Potential errors that can affect the heat transfer resistance
are therefore present and should be considered in relation to the
arrarent fluctuating nature of the heat transfer resistance -
Ire vanue of tac neat transfer resistance cn ran 0;— .5
cs
ao:er uran woao oe ex’ectea a; Reynclns nameer 3T 2. .rc
tjon of the resaTh showed the inlet solution tenreratare tD
cc
hicer then :n other runs in Grour C.
:ercar’ column in the tnermome;er was
t was aiscoverec.. tan;
cro:en arcicatanc ccc ac—a
termoerarures tans gavang a
a-org neat trars:er reses:arce
rIot of the everall hect transfer resistance versus EeyaoThs
runs 5 cc 13 in Groar k wos consr-ncccn. Se
—.7.2.’. e a c-’ log—_c. -:, s