What is tube toothing in heat exchange tubes?
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This post was last edited by Jiang Shui Ru Hai Liu on 2022-5-13 at 09:32. It’s a drawing from a design institute showing 3D heat exchange tubes of size 16x2 with internal ridges; I’m not sure what this manufacturing process is – I initially thought it was burrs :lol. I hope those with more experience can help explain it. Advantages and disadvantages, and what makes them different from ordinary heat exchange tubes.
It enhances the heat transfer coefficient of the medium inside the tube, but it is used for gas flow conditions within tubes; the fin ratio of such tubes is relatively low, as there is no full-scale fin effect, and therefore its impact on improving the overall K value is not very significant, especially for gases at low to moderate pressures. The mechanism of enhanced heat transfer is similar to that of the internal finned heat exchange tubes I use (see forum link https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=163192&highlight=%D6%B5%B5%C); it’s just that the structure is different. The most straightforward comparison is that when gas flows inside the tube, the area with the highest linear flow velocity at the center of the heat exchange tube is the hollow part; only the areas in contact with the teeth experience enhanced heat transfer, while the gas with high flow velocity at the center has fewer opportunities to participate in the heat exchange process.
Why is the website link in your post an adult site? ? ? Is it that willful!
It’s an advertisement post on the forum; it’s your computer… or maybe you should watch out for those little website addresses
You order it yourself; thankfully it shuts down quickly, otherwise it would be embarrassing. . . . . . :lol
It’s a website from over a decade ago; it’s no longer maintained due to business mergers within the company. If you find the forum’s introduction interesting, you can get in touch with me
Is this internal tooth pulling a new process or one that has been phased out?
Increase the heat transfer area. But the medium inside the tube must be clean.