Finned tube for evaporation and condensation
AssigneeWieland-Werke AG
InventorsJianying Cao, Zhong Luo, Jian Wu, Yalin Qiu
Life of this patent
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Abstract
A finned tube includes channels defined between adjacent fins on the tube body outer surface. Wings extend from side walls of the adjacent fins between the fin top and the fin base such that the wings form a barrier which splits the channel into an upper channel and a lower channel. A plurality of holes penetrate the barrier where the wings meet, so liquids and gases can pass into and out of the enclosed area defined by the lower channel. The wings can include alternating upper wings and lower wings, and there can be depressions formed in the fin top.
Claims15
A finned tube comprising:
- a tube body having an outer surface;
- at least one helical fin extending from the tube body outer surface, wherein the fin is monolithic with the tube body and the fin includes a fin top, a fin base, and a fin side wall, and wherein a channel is defined between two adjacent fin sections of the at least one helical fin;
- and
- a plurality of wings having a wing upper surface, the wings extending from the fin side wall between the fin top and the fin base, wherein the wings further comprise a plurality of alternating upper wings and lower wings, wherein the upper wing upper surface is further from the tube body outer surface than the lower wing upper surface and wherein the upper wings and the lower wings form a barrier which divides the channel into an upper channel and a lower channel,
- wherein the upper channel is provided above both of the upper wings and the lower wings and the lower channel is provided below both of the upper wings and the lower wings.
A method of producing a finned tube comprising:
- (a) providing a tube having an outer surface;
- (b) forming at least one helical fin in the tube outer surface, wherein the fin includes a fin side wall, a fin top and a fin base, and wherein a channel is defined between two adjacent fin sections of the at least one helical fin;
- (c) creating a plurality of alternating upper and lower wings in the fin side wall between the fin top and the fin base, wherein the wings have an upper surface, wherein the upper wing upper surface is further from the tube body outer surface than the lower wing upper surface, and wherein the upper wings and the lower wings form a barrier which divides the channel into an upper channel and a lower channel,
- wherein the upper channel is provided above both of the upper wings and the lower wings and the lower channel is provided below both of the upper wings and the lower wings.
Dependencies are inferred from the claim text.