METHOD FOR PERFORMING HEAT EXCHANGE AND HEAT EXCHANGER FOR REALISATION THEREOF Russian patent published in 2009 - IPC F28D7/06 

FIELD: heating systems.

SUBSTANCE: method for performing heat exchange involves consequent cooling of the first fluid medium by indirect heat exchange with the second fluid medium, in which there are the following stages: - introduction of the first fluid medium subsequently at least into two bundles of concentrical U-shaped tubes comprising at least the first heating zone and the second heating zone correspondingly, - introduction of the second fluid medium to the side of casing of U-shaped tube bundles; at that, each heating zone is partially separated from the other one by means of a wall, the first heating zone is a colder zone and the second heating zone is a hotter heating zone, tube bundle of the first heating zone which is colder is made from low-alloyed steel, and tube bundle of the second heating zone which is hotter is made from thermal resistant and corrosion resistant alloy; - drain of the second fluid medium which is cooled and the first fluid medium which is heated. Invention also refers to heat exchanger intended for implementing the above described method.

EFFECT: improving heat exchange characteristics owing to improved resistance to metal dusting and to corrosion damage.

2 cl, 3 dwg