Thermal Science 2011 Volume 15, Issue 3, Pages: 643-648
https://doi.org/10.2298/TSCI100827025S
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Effect of variable frequency electromagnetic field on deposit formation in installations with geothermal water in Sijarinjska spa (Serbia)
Stojiljković Dragan T. (Faculty of Technology, Leskovac)
Mitić Nebojša Č. (Faculty of Technology, Leskovac)
Šmelcerović Andrija (Department of Pharmacy, Faculty of Medicine, Nis)
Kaličanin Biljana (Department of Pharmacy, Faculty of Medicine, Nis)
Tasić-Kostov Marija (Department of Pharmacy, Faculty of Medicine, Nis)
Đurović-Petrović Maja (Ministry of Science and Technological Development, Belgrade)
In this paper we have examined the effect of variable frequency
electromagnetic field generated with a homemade device on deposit formation
in installations with geothermal water from Sijarinjska Spa. The frequency
alteration of the electromagnetic field in time was made by means of the
sinusoidal and saw-tooth function. In laboratory conditions, with the flow of
geothermal water at 0.015 l/s and temperature of 60 °C for 6 hours through a
zig-zag glass pipe, a multiple decrease of total deposit has been achieved.
By applying the saw-tooth and sinusoidal function, the decrease in contents
of calcium and deposit has been achieved by 8 and 6 times, respectively. A
device was also used on geothermal water installation in Sijarinjska Spa
(Serbia), with the water flow through a 1'' diameter non-magnetic prochrome
pipe at 0.15 l/s and temperature of 75 °C in a ten-day period. A significant
decrease in total deposit and calcium in the deposit has also been achieved.
Keywords: geothermal water, effect of electromagnetic field, deposit formation in installations