DOUBLE PIPE FOR HEAT EXCHANGE

Abstract: a double pipe for heat exchange in which an inner pipe is inserted into an outer pipe to enable heat exchange among a fluid flowing through an inner flow path in the inner pipe and an outer flow path between the inner pipe and the outer pipe. in a straight pipe portion extending linearly in a pipe lengthwise direction, a pipe wall of the inner pipe has a plurality of convex portions in a circumferential direction so as to form a concave/convex cross-sectional shape, and in the pipe wall of the inner pipe, an inclined pipe wall portion whose convex portion extends spirally in the pipe lengthwise direction and a turbulence-generating pipe wall portion whose convex portion has a lead angle different from that of the inclined pipe wall portion are formed in series in the pipe lengthwise direction.

Inventor(s): Jorge David GOMEZ HERRERA, Hisashi TERAYAMA

CPC Classification: F28D7/10 (HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means ; furnaces ; details of heat-exchange apparatus of general))

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