HEAT EXCHANGE SURFACE Russian patent published in 1996 - IPC

FIELD: heat engineering; radiators of automobiles, thermoelectric coolers and other heat exchangers. SUBSTANCE: heat exchanger surface has tube with flat opposite walls, tube space being divided by partitions into separate channels; tube is provided with outer cooling ribs in form of parallel rows of lobes whose plane is arranged at angle to tube wall. Lobes of at least two adjacent rows are inclined to opposite sides. Each lobe is symmetrical, with central axis passing through middle of base and top of lobe being arranged at angle to base. Central axes of lobes in adjacent rows are inclined in opposite sides relative to plane square to tube wall. EFFECT: enlarged operating capabilities. 2 dwg