HEAT EXCHANGER PIPE Russian patent published in 2014 - IPC F28F1/42 F28F13/02 

FIELD: power industry.

SUBSTANCE: in a heat exchanger pipe, smooth pipe sections and ledges form a channel, where ledges feature additional heat exchanger intensifier in the form of discreet slots perpendicular to flow, and the channel matches geometry relations: l₂=(90-100)h; l₁=(90-100)h; l'/l₁=0.05; h/D=0.03, where l₂ is slot length, mm; l₁ is ledge length, mm; l' is length of ledge section between shallow slots, mm; h is ledge height, mm; D is inner diameter of heat exchanger pipe, mm.

EFFECT: enhanced power efficiency due to reduced flow friction.

4 dwg, 1 tbl