THERMAL SCIENCE

International Scientific Journal

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
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 3, PAGES [643 - 648]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, 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