HEAT EXCHANGER Russian patent published in 2006 - IPC F28D7/00 

FIELD: heat exchange apparatus.

SUBSTANCE: heat exchanger comprises bank of pipes of the oval cross-section which are secured in the pipe desks and mounted inside the casing. The greater axis of the oval is mounted at an angle 3-5 degrees to the direction of the flow in the interpipe space. The pipes are inclined to the direction of the flow at the same angle or at the alternating angles. The oval cross-section of the pipe is shaped without acute corners and can be made in particular of an ellipse. The thickness of the pipes is constant or variable. For the pipe of elliptic cross-section, the thickness of the pipe wall has a minium along the small axis of the ellipse and has a maximum along the large axis of the ellipse.

EFFECT: enhanced efficiency.

7 cl, 5 dwg