TY - JOUR
TI - Effect of variable frequency electromagnetic field on deposit formation in installations with geothermal water in Sijarinjska spa (Serbia)
AU - Stojiljković Dragan T
AU - Mitić Nebojša Č
AU - Šmelcerović Andrija
AU - Kaličanin Biljana
AU - Tasić-Kostov Marija
AU - Đurović-Petrović Maja
JN - Thermal Science
PY - 2011
VL - 15
IS - 3
SP - 643
EP - 648
PT - Article
AB - 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.