PIPE IN PIPE TYPE HEAT EXCHANGER Russian patent published in 2016 - IPC F28F13/00 

FIELD: heating.

SUBSTANCE: heat exchanger comprises two coaxial tubes, the inner of which consists of alternating converging and diffusing elements provided in the form of lateral surfaces of truncated cones of different lengths interconnected perimeters of large and small bases of the cone, on the outside of which the annular channel formed by the outer side the cone surface and the inner surface of the outer pipe of the heat exchanger is woven metal mesh made of wires with a diameter of 2 mm, placed at an average distance of 2 mm from the outer frustoconical surface of the inner tube.

EFFECT: achieved technical result consists in increasing the heat transfer due to turbulence of flow in the wall region while reducing the hydraulic resistance to the coolant flow.

5 cl, 2 dwg