Effect of variable frequency electromagnetic field on deposit formation in installations with geothermal water in Sijarinjska Spa (Serbia)

• Published in: Thermal science 2011, Vol.15 (3), p.643-648
• Main Authors: Stojiljković, D.T., Faculty of Technology, Leskovac (Serbia), Mitić, N.Č., Faculty of Technology, Leskovac (Serbia), Šmelcerović, A.A., Faculty of Medicine, Niš (Serbia), Kaličanin, B.M., Faculty of Medicine, Niš (Serbia), Tasić-Kostov, M.Ž., Faculty of Medicine, Niš (Serbia), Đurović-Petrović, M.D., European University, Belgrade (Serbia). Faculty for International Engineering
• Format: Article
• Language: English
• Subjects: AGUAS SUBTERRAINEAS; Calcium; CAMPO ELECTROMAGNATICO; CHAMP ALECTROMAGNATIQUE; CORRIENTES SUBTERRAINEAS; COURANT SOUTERRAIN; EAU SOUTERRAINE; ELECTROMAGNETIC FIELD; Electromagnetic fields; Electromagnetism; EQUIPO; GROUNDWATER; GROUNDWATER FLOW; http://www.fao.org/aos/agrovoc#c_25341; http://www.fao.org/aos/agrovoc#c_2631; http://www.fao.org/aos/agrovoc#c_32472; http://www.fao.org/aos/agrovoc#c_3391; http://www.fao.org/aos/agrovoc#c_34267; http://www.fao.org/aos/agrovoc#c_49909; http://www.fao.org/aos/agrovoc#c_5925; http://www.fao.org/aos/agrovoc#c_6926; MATARIEL; PIPES; SADIMENT; SADIMENTATION; SEDIMENT; SEDIMENTACIAN; SEDIMENTATION; SEDIMENTO; SERBIA; SERBIE; TUBERAA; TUYAU; Water flow
• ISSN: 0354-9836; 2334-7163
• DOI: 10.2298/TSCI100827025S

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 deg 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 sup(nd) diameter non-magnetic prochrome pipe at 0.15 l/s and temperature of 75 deg C in a ten-day period. A significant decrease in total deposit and calcium in the deposit has also been achieved.