THERMAL SCIENCE

International Scientific Journal

Dragan T. Stojiljković

,

Nebojša Č Mitić

,

Andrija Šmelcerović

,

Biljana Kaličanin

,

Marija Tasić-Kostov

,

Maja Đurović-Petrović

EFFECT OF VARIABLE FREQUENCY ELECTROMAGNETIC FIELD ON DEPOSIT FORMATION IN INSTALLATIONS WITH GEOTHERMAL WATER IN SIJARINJSKA SPA (SERBIA)

ABSTRACT
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
PAPER SUBMITTED: 2010-08-27
PAPER REVISED: 2010-09-18
PAPER ACCEPTED: 1970-01-01
DOI REFERENCE: https://doi.org/10.2298/TSCI100827025S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2011, VOLUME 15, ISSUE Issue 3, PAGES [643 - 648]
REFERENCES
  1. Herzog, R. E., Shi, Q., Patil, J. N., Katz, J. L., Magnetic water treatment: The effect of iron on calcium carbonate nucleation and growth, Langmuir, 5 (1989), 3, pp. 861-867
  2. Kozic, V., Lipus, L. C., Magnetic water treatment for a less tenacious scale, Journal of Chemical Information and Computer Sciences, 43 (2003), 6, pp. 1815-1819
  3. Kozic, V., Lipus, L. C., Krope, J., SEM Examination of the influence of a magnetic water-treatment device on the scale precipitation in an industrial machine for bottle cleaning, Journal of Mechanical Engineering, 50 (2004), 11, pp. 554-562
  4. Lipus, L. C., Dobersek, D., Influence of magnetic field on the aragonite precipitation, Chemical Engineering Science, 62 (2007), 7, pp. 2089-2095
  5. Lipus, L. C., Krope, J., Crepinsek, L., Dispersion destabilization in magnetic water treatment, Journal of Colloid and Interface Science, 236 (2001), 1, pp. 60-66
  6. Gabrielli, C., Jaouhari, R., Maurin, G., Keddam, M., Magnetic water treatment for scale prevention, Water Research, 35 (2001), 13, pp. 3249-3259
  7. Barrett, R. A., Parsons, S. A., The influence of magnetic fields on calcium carbonate precipitation, Water Research, 32 (1998), 3, pp. 609-612
  8. Fathi, A., Mohamed, T., Claude, G., Maurin, G., Mohamed, B. A., Effect of a magnetic water treatment on homogeneous and heterogeneous precipitation of calcium carbonate, Water Research, 40 (2006), 10, pp. 1941-1950
  9. Alimi, F., Tlili, M., Amor, M. B., Gabrielli, C., Maurin, G., Influence of magnetic field on calcium carbonate precipitation, Desalination, 206 (2007), 1-3, pp.163-168
  10. Cho, Y. I., Fan, C., Choi, B.-G., Theory of electronic anti-fouling technology to control precipitation fouling in heat exchanges, International Communications in Heat and Mass Transfer, 24 (1997), 6, pp. 757-770
  11. Stojiljković, D. T., Stojijković, S. T., Mitić, N. C., Pejić, D. M., Djurović-Petrović, M., Pilot plant for exploitation of geothermal waters, Thermal Science, 10 (2006), 4, pp. 195-203.
PDF VERSION [DOWNLOAD]
Effect of variable frequency electromagnetic field on deposit formation in installations with geothermal water in Sijarinjska spa (Serbia)

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence