INCREASING HEAT TRANSFER EFFICIENCY OF HEAT EXCHANGING APPARATUS TUBES

An experimental rig made of silicate and brass tubes of a "double-pipe heat exchanger" type has been developed
to study the corrosion process and scale formation. Experimental studies have shown that the rates of corrosion
of silicate coatings of heat exchange tubes increase linearly with an increase in the speed of seawater move-
ment. It has been established that the rates of corrosion of silicate coatings of heat exchange tubes do not exceed
0.020 g / (m ² ·day). During long-term tests of silicate coatings of tubes, on the surfaces of the latter insignificant
scale deposits are formed, the thickness of which is within 0.14–0.23 mm, while on the metal surfaces of the tubes
a strong layer of scale and corrosion products with a thickness of 1.24–1.98 mm is formed. The conducted studies
have shown that in silicate coatings of heat exchange tubes the increase in the heat transfer coefficient is approxi-
mately 12–25%, depending on the operating conditions and the technological mode of the apparatus

Author:  N. Yu. Ibragimov, É. N. Ibragimli
Keywords:  heat exchange tubes, elevation of the efficiency, silicate coatings, corrosion rate, scale deposits, coating thickness, heat transfer coefficient, process mode, operating conditions of the apparatus
Page:  1354