HEAT-EXCHANGING DEVICE Russian patent published in 2014 - IPC F28F1/12 F28D7/08 F28D1/47 

FIELD: heating.

SUBSTANCE: in the heat exchanging device the finned heat exchanging tube with the diameter d is made serpentine-shaped with an outer finning diameter D and the thickness of the fins L₁, located at a distance L₂ from each other. The amplitude of the serpentine A on the outer finning diameter is not less than $$A=D\times (2+\frac{1}{\frac{L1+L2}{L1}-1}),$$ the wave period of the serpentine P is not less than $$P=2D\times (1+\frac{1}{\frac{L1+L2}{L1}-1}).$$

EFFECT: intensification of heat exchanging due to turbulence in the flow passing inside the finned serpentine-shaped tubes, and increase in the area of heat exchanging of the device.

23 cl, 8 dwg, 2 tbl