Magnetic Water Treatment Research Papers:
7. Effect of magnetic technology in scale (7.1 - 7.39).
● 7.10. Title of Research:
Influence of a modulated electromagnetic field
on fouling in a double-pipe heat exchanger
- ÊÃËíÑ ãÌÇá ßåÑæãÛäÇØíÓí ãÚÏá Úáì ÇáÞÇÐæÑÇÊ Ýí ãÈÇÏá ÍÑÇÑí ãÒÏæÌ ÇáÃäÈæÈ.
● Researchers:
Abdullah Shahryari
and Mahmood Pakshir
Department
of Materials Science
and Engineering,
Shiraz University,
Shiraz, Iran.
● Publisher: Journal of materials
processing technology,
203 (2008) 389–395.
-
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2021 æÍÇÕáÉ Úáì:
CiteScore Tracker in 2020 year = 8.9
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Ýì ãæÞÚ Web of Science ãäÐ ÚÇã 1990 ÍÊì ÇáÃä
æåì ÍÇÕáÉ Úáì:
Impact Factor
in 2020 Year
= 4.669
● Research Link: https://www.sciencedirect.com/
science/
article/
pii/
S0924013607009727
● Abstract:
In this study,
the effect of a modulated electromagnetic field (MEF)
on fouling in a double-pipe heat exchanger (DPHE)
has been investigated.
A double-loop-configuration consisting
of cooling and heating water cycles was used
for the experiments.
The quality of heat transfer
in the DPHE was studied via
in situ monitoring of the fouling resistance.
Moreover,
the influence of cooling water linear velocity,
on the MEF treatment efficiency has also been investigated.
In this regard,
the water flow velocities of 0.5,
0.8 and 1.3ms−1 were selected.
Results show
that the application of the MEF on the cooling water
flowing at 0.5 ms−1 velocity,
decreased
the fouling resistance
in the heat exchanger
by 76.3% compared to the blank (untreated) test.
However,
increasing the water velocity resulted in
a decrease in the MEF efficiency,
where 64.3% and 57.8% drop in fouling resistance of the DPHE was
recorded
for 0.8 and 1.3 ms−1 water velocities,
respectively.
On the other hand,
the water ionic calcium
(Ca+2)
measurements showed
a significant decrease in the cooling water
calcium as a result of the MEF treatment.
Finally,
the MEF design parameters along with the responsible mechanism for the observed results
have been discussed.
● ãáÎÕ ÇáÈÍË:
- Ýí åÐå ÇáÏÑÇÓÉ ¡
Êã ÇáÊÍÞíÞ Ýí ÊÃËíÑ ÇáãÌÇá ÇáßåÑæãÛäÇØíÓí ÇáãÚÏá
O(MEF) Úáì ÇáÞÇÐæÑÇÊ Ýí ãÈÇÏá ÍÑÇÑí ãÒÏæÌ ÇáÃäÈæÈì
(DPHE) .. Êã ÇÓÊÎÏÇã Êßæíä ÇáÍáÞÉ ÇáãÒÏæÌÉ Çáãßæä ãä ÏæÑÇÊ
ãíÇå ÇáÊÈÑíÏ æÇáÊÓÎíä ááÊÌÇÑÈ.
ÊãÊ ÏÑÇÓÉ ÌæÏÉ äÞá ÇáÍÑÇÑÉ
Ýí
DPHE ãä ÎáÇá ÇáãÑÇÞÈÉ Ýí ÇáãæÞÚ áãÞÇæãÉ ÇáÞÇÐæÑÇÊ.
- ÚáÇæÉ Úáì Ðáß ¡
Êã ÃíÖðÇ ÇáÊÍÞÞ ãä ÊÃËíÑ
ÇáÓÑÚÉ ÇáÎØíÉ áãÇÁ ÇáÊÈÑíÏ
Úáì ßÝÇÁÉ ãÚÇáÌÉ
MEF.
- Ýí åÐÇ ÇáÕÏÏ ¡
Êã ÇÎÊíÇÑ ÓÑÚÇÊ ÊÏÝÞ ÇáãíÇå
0.5 æ 0.8 æ 1.3
ãááí ËÇäíÉ
-1.
-
ÃÙåÑÊ ÇáäÊÇÆÌ Ãä ÊØÈíÞ
MEF Úáì ãíÇå ÇáÊÈÑíÏ
ÇáãÊÏÝÞÉ ÈÓÑÚÉ 0.5 ãááí ËÇäíÉ -1 ¡
Þáá ãä ãÞÇæãÉ ÇáÞÇÐæÑÇÊ
KÝí ÇáãÈÇÏá ÇáÍÑÇÑí ÈäÓÈÉ 76.3٪
ãÞÇÑäÉ ÈÇÎÊÈÇÑ ÇáÝÑÇÛ
(ÛíÑ ÇáãÚÇáÌ).
- æãÚ Ðáß ¡
ÃÏÊ ÒíÇÏÉ ÓÑÚÉ ÇáãÇÁ
Åáì ÇäÎÝÇÖ Ýí ßÝÇÁÉ
MEF
¡ ÍíË Êã ÊÓÌíá ÇäÎÝÇÖ
ÈäÓÈÉ 64.3٪ æ 57.8٪ Ýí ãÞÇæãÉ
ÇáÞÇÐæÑÇÊ áÜ
DPHE
ÚäÏ 0.8 æ 1.3 ãááí/ ËÇäíÉ ÓÑÚÇÊ ãÇÁ ¡
Úáì ÇáÊæÇáí.
- ãä äÇÍíÉ ÃÎÑì ¡
ÃÙåÑÊ ÞíÇÓÇÊ ÇáßÇáÓíæã ÇáÃíæäí ÇáãÇÆí (Ca+2) ÇäÎÝÇÖðÇ ßÈíÑðÇ Ýí ÇáßÇáÓíæã Ýí ãÇÁ ÇáÊÈÑíÏ äÊíÌÉ ãÚÇáÌÉ
MEF
. ÃÎíÑðÇ ¡
ÊãÊ ãäÇÞÔÉ
ãÚáãÇÊ ÊÕãíã MEF ÌäÈðÇ Åáì ÌäÈ ãÚ ÇáÂáíÉ ÇáãÓÄæáÉ Úä ÇáäÊÇÆÌ ÇáãáÇÍÙÉ.
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