VORTEX HEAT EXCHANGE ELEMENT Russian patent published in 2011 - IPC F28D7/00 

FIELD: power industry.

SUBSTANCE: vortex heat exchange element includes heat exchange cylindrical tubes and inner tube with cylindrical surfaces, which are coaxially located one in the other; at that, tube of larger diameter is divided into sections; inside each of tubes there installed are at least two swirlers; at that, one swirler is installed at section inlet, and the other one at some distance between them, which is determined by complete attenuation of rotational movement of swirled flow at full heat load; inlet of cold heat carrier to each of tube sections of larger diameter is made in the form of contracting nozzle on inner surface of which there located are curved grooves longitudinally arranged from inlet hole to outlet hole and made in the form of dovetail. At that, near inlet hole of contracting nozzle there is annular groove which is connected both to dirt removal device, and to longitudinally located curved grooves; at that, inlets are made either on one and the same side, or on opposite sides in relation to flow movement, thus providing both counter-flow, and direct-flow movement scheme of heat carriers in element; at that, inner thread with cylindrical surfaces is made from bimetal, and material of its surface on hot heat carrier side has heat conductivity coefficient which is more by 2.0-2.5 times than material of surface on cold heat carrier side.

EFFECT: higher effective use of vortex heat transfer method.

5 dwg