FIELD: power engineering.
SUBSTANCE: heat exchange pipe, in which a channel is made with protrusions and grooves, besides, the channel is made with geometric ratios: h/D=0.03, l1=(90-100)/h, l2=(90-100)h, where h - protrusion height, mm D - inner diameter of a heat exchange pipe, mm l1 - protrusion length, mm l2 - groove length, mm.
EFFECT: invention makes it possible to increase energy efficiency due to reduction of hydraulic resistance.
4 dwg
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