Axial symmetry type cross inner-fin heat transfer enhanced tube

An axisymmetric heat exchange tube technology, applied in the field of heat exchange tubes, can solve problems such as the inability to maximize the cross-sectional temperature field, difficulty in ensuring good contact of the outer tube, and poor contact of the outer tube, so as to achieve no sealing problem and achieve cross-sectional temperature The effect of field and section temperature field uniformity

Active Publication Date: 2015-04-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. It is impossible to maximize the uniformity of the cross-sectional temperature field
The inner fin structure makes the high-temperature flue gas flow through the entire heat exchange tube only through fixed channels, and the heat exchange between high-temperature flue gas in different channels is less, especially the finless area in the center of the pipe is still a high-temperature air flow area, which cannot Maximize the uniformity of the cross-sectional temperature field
[0008] 2. It is difficult to ensure sealing and good contact with the outer tube
The inner fin tube is made of two half-shells plugged together, it is difficult to ensure the seal, so it must be used with the outer tube, and there is a problem of poor contact with the outer tube, which greatly reduces the heat exchange effect

Method used

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  • Axial symmetry type cross inner-fin heat transfer enhanced tube
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  • Axial symmetry type cross inner-fin heat transfer enhanced tube

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Embodiment Construction

[0033] The present invention will be described in more detail below in conjunction with the drawings.

[0034] Such as Figure 1a , Figure 1b , Figure 1c , Figure 1d , Figure 1e with figure 2 As shown, an axisymmetric cross internal fin reinforced heat exchange tube of the present invention includes a plurality of unit tubes 1 and a rotating unit tube 2 arranged at intervals, and the rotating unit tube 2 is rotated by a predetermined angle by the unit tube 1 Become. The unit tube 1 is integrally connected to the side wall of the unit tube 1 in the axial direction with a plurality of pairs of upper and lower facing fins 3 and wide fins 4 passing through the cross section of the heat exchange tube, and the wide fins 4 are located in the unit tube. On the left and right sides of 1, the multiple pairs of fins 3 are located between the wide fins 4 on the left and right sides, and each pair of fins 3 facing up and down is axisymmetric, between the top ends of each pair of fins 3 ...

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Abstract

An axial symmetry type cross inner-fin heat transfer enhanced tube comprises a plurality of unit tubes and rotating unit tubes. The unit tubes and the rotating unit tubes are spaced. The unit tubes rotate in preset angles to form the rotating unit tubes. A plurality of fin pairs vertically relative and wide fins penetrating the section of the heat transfer tube are axially integrally connected with the inside of each unit tube. The wide fins are arranged on the lefts and the rights of the unit tubes. The fin pairs are arranged between the lateral wide fins and in axial symmetry. The distance of the tops of every fin pair is a preset distance L3. The wide fins and the fins extend axially without thorough penetration, allowing smooth segments L1 and inner fin segments L2 to be preserved with preset lengths in the unit tubes and the rotating unit tubes; the heat transfer tube has the advantages that under condensed phase-change heat transfer condition, condensation heat transferred wall surfaces are added, boundary layer thickness of noncondensing air is greatly slimmed, and condensation heat transfer coefficient is increased.

Description

Technical field [0001] The invention belongs to the technical field of heat exchange tubes, and relates to a heat exchanger unit structure, in particular to an axisymmetric cross internal fin reinforced heat exchange tube. Background technique [0002] Heat exchangers are widely used in various industries in the national economy, and are one of the most common equipment in the energy, petroleum, chemical, metallurgical, power, light industry, food and even aerospace industries. It is not only a widely used equipment to ensure the technological process and conditions, but also an important equipment to develop secondary energy sources and realize heat recovery and save energy consumption. The development and design of advanced enhanced heat exchange tubes and reasonable design, operation and improvement of heat exchange equipment are very important for saving metal, energy, capital and space. [0003] Adding internal fins to the heat exchange tube can not only increase the heat exc...

Claims

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Application Information

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IPC IPC(8): F28F1/40
Inventor 赵钦新杨文君王云刚陈中亚孙一睿潘佩媛
Owner XI AN JIAOTONG UNIV
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