HEAT EXCHANGE TUBE Russian patent published in 2015 - IPC F28F1/42 

FIELD: heating.

SUBSTANCE: heat exchange tube in which the grooves with the depth of 0.3H to 0.5H, where H is the wall thickness of the tube, applied with the pitch on the outer surface of the tube and the protrusions corresponding to them on the inner surface of the tube are made along the helical line with the pitch which is ranging from D to 8D, where D is the outer diameter of the tube. In the helical grooves the finning is located, made of wire with the introduction into the internal space of the tube with a pitch from 2D to 16D at right angle to the tube axis.

EFFECT: increase in heat exchange.

1 dwg