Is the Twisted Tape used in air coolers reliable?
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By using the spin knob straps, the heat exchange efficiency can be **improved. In the previous design with two 9×3 ordinary tubes, the margin was negative; with the spin knob straps, a 2×6×3 design now has sufficient margin. The concern is that after making this choice, the actual performance on site might not meet the expectations calculated earlier, which would be really problematic. I’m wondering if anyone with experience in such designs could offer some guidance. Thank you very much O(∩_∩)O
I’m also researching this. In HTRI, this Twisted Tape consists of circular tubes that have been twisted into a spiral shape, with a circular cross-section. I’ve seen that few domestic heat pipe suppliers produce this type; the only ones available are spiral tubes with an elliptical cross-section. Piping and Twisted Tape are different. I wonder how this senior has resolved it now. I tried using Twisted Tape, and the resistance was much higher. I’ll give it another try by increasing the flow rate inside the tube; the effect might be similar to that of Twisted Tape. It’s rarely used in domestic applications. I was thinking that by simply increasing the flow rate, the resistance will rise; and under the same conditions as Twisted Tape, the heat exchange efficiency in the same space will remain the same
The spiral strip doesn’t require heat exchange tubes to be manufactured by manufacturers; we make them ourselves – it’s just a matter of inserting them into the tube. As for the impact of tube shape and flow rate on heat exchange, this has always been a focus of research in heat exchangers. Each has its own way of use, and it cannot be generalized