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Air-cooled condenser finned tube

A technology of air-cooled condensers and finned tubes, which is applied in the direction of tubular elements, heat exchanger shells, lighting and heating equipment, etc., and can solve the problems of inability to apply slots to enhance heat transfer, high cost of finned tube materials, and problems with finned tubes. Low heat transfer efficiency and other issues, to achieve the effects of stress reduction, cost reduction, and performance improvement

Pending Publication Date: 2020-02-28
江苏双良冷却系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The base tube of the single-row tube has poor rigidity and depends on the fins to bear the pressure, which limits the thickness of the fins. The material cost of the finned tubes is high, and it also restricts the design of the fins. It is impossible to apply slots to enhance heat transfer. And other technical means, the heat transfer efficiency of finned tubes is low

Method used

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  • Air-cooled condenser finned tube
  • Air-cooled condenser finned tube
  • Air-cooled condenser finned tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1~5 A finned tube of an air-cooled condenser is shown, wherein figure 1 It is a cross-sectional view of the finned tube of Embodiment 1, which is a finned tube of an air-cooled condenser, which is composed of a base tube 1 and serpentine fins 2 .

[0034] in figure 2 It is a cross-sectional view of the base pipe 1 in Embodiment 1. The base pipe 1 is a similar flat special-shaped pipe. An inner groove is respectively arranged on the two sides where the long side of the cross-section of the base pipe 1 is located, and the inner groove is parallel to the center of the base pipe 1. Axis and symmetrical to the long axis of the cross section. The inner grooves on both sides are located in the middle of the base pipe 1 (in the height direction). The inner grooves on both sides form a pair and form a narrow gap on the inner wall of the base pipe 1. The size of the gap is It should be no less than 0 mm, but generally no more than 5 mm; each pair of inner groov...

Embodiment 2

[0046] Such as Figure 6 As shown, a finned tube of an air-cooled condenser in Embodiment 2.

[0047] Different from Embodiment 1, in this embodiment, the serpentine fins 2 are disconnected at the inner groove of the base pipe 1. Viewed from the cross section, the fins on the left and right sides of the base pipe are all in the inner groove. It is discontinuous, which is equivalent to cutting the serpentine fin 2 of embodiment 1 at the inner groove and dividing it into two, and two serpentine fins 2 are formed on each side of the base pipe 1; other technical solutions and implementation Example 1 is the same.

[0048] Therefore, compared with Embodiment 1, the serpentine fins 2 in this embodiment are less affected by the deformation of the base pipe 1 .

Embodiment 3

[0050] Such as Figure 7~8 Shown is a finned tube of an air-cooled condenser in Embodiment 3.

[0051] in Figure 7 It is a cross-sectional view of a finned tube of Embodiment 3 of the present invention, a finned tube of an air-cooled condenser, including a base tube 1 and serpentine fins 2, and the serpentine fins 2 are respectively arranged on both sides of the base tube 1; Viewed from the cross-section of the finned tube, the serpentine fins 2 on each side of Embodiment 3 are continuous (not broken at the inner groove).

[0052] in Figure 8 It is a cross-sectional view of the base tube in Example 3 of the present invention. In this embodiment, there are two inner grooves on the left and right sides of the base tube 1, which divide the inner cavity of the base tube 1 into three small cavities.

[0053] In this embodiment, except that the base pipe 1 is different, other structural forms and features are the same as those in Embodiment 1.

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Abstract

The invention relates to an air-cooled condenser finned tube, and belongs to the technical field of air-cooled condensers. The air-cooled condenser finned tube comprises a base tube (1) and snakelikefins (2). The base tube (1) is a special-shaped tube with a flat cross section. The two side faces of the long sides of the cross section of the base tube (1) are each provided with at least one innergroove. The inner grooves are parallel to the central axis of the base tube (1) and symmetrical about the long axis of the cross section. The length of the inner grooves is approximately equal to thelength of the base tube (1). The inner grooves at the corresponding positions of the two side faces form one pair. The inner grooves in each pair form a narrow gap in the inner wall of the base tube(1). The inner grooves in each pair divide an inner cavity of the base tube (1) into two smaller inner cavities communicating with each other through the corresponding narrow gap. The outer portions of the two side faces of the long sides of the cross section of the base tube (1) are each provided with at least one snakelike fin (2). By means of the air-cooled condenser finned tube, the rigidity of the base tube can be increased, material cost is reduced, and the heat exchange effectively can also be improved.

Description

technical field [0001] The invention relates to a finned tube of an air-cooled condenser, belonging to the technical field of air-cooled condensers. Background technique [0002] The function of the air-cooled condenser is to condense the exhaust steam discharged from the steam turbine or turbine into water, so as to send it to the boiler for use to form a cycle. [0003] The heat exchange element used in the air-cooled condenser is a finned tube that enhances heat exchange outside the tube, and the most common one is a single row of tubes. The single-row tube is composed of a base tube and fins welded outside the tube. The base tube is a rectangular flat tube and the fins are serpentine fins. The finned tubes are arranged in a single row in the tube bundle of the air-cooled condenser. The advantage of single-row tubes is that it has good antifreeze performance when used in cold winter areas, avoiding the pressure difference in the tubes caused by the inconsistent heat load...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/30F28F9/18
CPCF28F1/30F28F9/18
Inventor 薛海君
Owner 江苏双良冷却系统有限公司