An axisymmetric cross-finned heat exchange tube

An axisymmetric, heat exchange tube technology, applied in the field of heat exchange tubes, can solve the problems of inability to maximize the cross-section temperature field, difficult to ensure good contact of the outer tube, poor contact of the outer sleeve, etc. Field and cross-section temperature field uniform effect

Active Publication Date: 2016-08-17
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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  • An axisymmetric cross-finned heat exchange tube
  • An axisymmetric cross-finned heat exchange tube
  • An axisymmetric cross-finned heat exchange tube

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Embodiment Construction

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

[0034] Such as Figure 1a , Figure 1b , Figure 1c , Figure 1d , Figure 1e and figure 2 As shown, the present invention is an axisymmetric cross-finned heat exchange tube, which includes a plurality of unit tubes 1 arranged at intervals and a rotating unit tube 2, the rotating unit tube 2 is rotated by the unit tube 1 at a preset angle made. The unit tube 1 is integrally connected with the side wall of the unit tube 1 along the axial direction, and there are multiple pairs of fins 3 facing up and down and wide fins 4 penetrating the cross section of the heat exchange tube. 1, the plurality of 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, and between the tops of each pair of fin plates 3 The distance is the preset distance L3, the design of fin 3 and wide fin ...

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Abstract

An axisymmetric cross-finned enhanced heat exchange tube, including a plurality of unit tubes arranged at intervals and rotating unit tubes, the rotating unit tubes are formed by rotating the unit tubes at a preset angle, and the unit tubes are rotated along the axis There are many pairs of upper and lower opposite fins and wide fins penetrating the cross-section of the heat exchange tube integrally connected with the side wall of the unit tube, the wide fins are located on the left and right sides of the unit tube, and the plurality of pairs The fins are located between the wide fins on the left and right sides, and each pair of up and down relative fins is axisymmetric, and the distance between the tops of each pair of fin plates is a preset distance L3; the wide fins and the fins ( Extending in the axial direction but not completely penetrating, so that there is a smooth segment L1 and an inner fin segment L2 with a preset length in the unit tube and the rotating unit tube; the heat exchange tube of the present invention can not only increase the condensation temperature for occasions with condensation phase heat transfer The wall surface for heat exchange, and greatly reduces the thickness of the non-condensable gas boundary layer, increasing the condensation heat transfer coefficient.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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