February 13, 2023
1. Principle of T-shaped finned tube:
T-shaped finned tube is a kind of high efficient heat exchange tube, which is formed by rolling the plain tube. The structure of T-shaped finned tube is characterized by forming a series of spiral annular T-shaped tunnels on the outer surface of the tube. When the medium outside the tube is heated, a series of bubble nuclei are formed in the tunnel. As the tunnel cavity is heated around, the bubble nucleus expands rapidly and fills the inner cavity. Continuous heating increases the pressure inside the bubble rapidly, prompting the bubble to eject rapidly from the slit on the tube surface. When bubbles are ejected, they have a large scouring force site and generate a certain local negative pressure, which makes the surrounding liquid with lower temperature flow into the T-shaped tunnel and form continuous boiling. In unit time, the heat taken away by unit surface area r} is much greater than that of bare tube, so this tube type has a higher boiling heat transfer capacity.
2. Specification of T-shaped finned tube:
16 FINS / INCH FIN PITCH M = 1.59mm
| Plain section | Finned section | |||||||||||
| Code No. |
External Ø |
Int. | Wallthickn. |
Root dia. Ø |
Ext. Ø |
Wall-thickn. | Ext. surface |
Radio outs. to ins. |
Weight | |||
| Inch | d1 | d2 | S1 | Int. d3 | Ext. d4 | d5 | BWG | S2 | Aa | Aa/Ai | G Cu | |
| mm | mm | mm | mm | mm | mm | mm | m²/m | ca. kg/m | ||||
|
16.1/2.19 16.1/2.18 |
1/2" | 12,70 |
9,80 9,40 |
1,45 1,65 |
7,50 7,00 |
9,50 | 12,50 |
19 18 |
1,00 1,25 |
0,08 |
3,6 3,8 |
0,38 0,43 |
|
16.5/8.17 16.5/8.16 |
5/8" | 15,90 |
11,90 11,60 |
2,00 2,15 |
9,70 9,40 |
12,70 | 15,70 |
17 16 |
1,50 1,65 |
0,11 |
3,6 3,7 |
0,65 0,69 |
|
16.3/4.17 16.3/4.16 16.3/4.14 |
3/4" | 19,00 |
15,00 14,70 14,00 |
2,00 2,15 2,50 |
12,80 12,50 11,60 |
15,80 | 18,80 |
17 16 14 |
1,50 1,65 2,10 |
0,13 |
3,3 3,4 3,6 |
0,83 0,88 1,03 |
|
16.7/8.17 16.7/8.16 16.7/8.14 |
7/8" | 22,20 |
18,20 17,90 17,20 |
2,00 2,15 2,50 |
16,00 15,70 14,80 |
19,00 | 22,00 |
17 16 14 |
1,50 1,65 2,10 |
0,16 |
3,1 3,2 3,3 |
1,00 1,06 1,25 |
|
16.1.17 16.1.16 16.1.14 |
1" | 25,40 |
21,40 21,10 20,40 |
2,00 2,15 2,50 |
19,20 18,90 18,00 |
22,20 | 25,20 |
17 16 14 |
1,50 1,65 2,10 |
0,18 |
3,0 3,1 3,2 |
1,18 1,25 1,49 |
3. Applicable scope of T-shaped finned tube:
As long as the shell side medium is clean, free of solid particles and gums, T-shaped finned tubes can be used as heat exchange elements to form T-shaped finned tube high efficiency heat exchanger to improve the boiling heat transfer effect at the shell side. T-shaped finned tube is applicable to the working conditions of shell side boiling heat transfer in petrochemical, energy and other industrial fields. It is not applicable to the medium with solid dust and easy coking in the shell.
