Multi-directional corrugated inner finned tube

A technology of corrugated fins and inner fins is applied in the field of strengthening heat transfer and heat exchange tubes, which can solve the problems of rare ways of strengthening heat transfer, and achieve the effects of inhibiting scaling in the tube, various structural forms, and increasing the heat transfer area.

Active Publication Date: 2016-02-03
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A comprehensive analysis of the existing research on inner finned tubes found that most of the research focuses on how to expand the effective heat transfer area in the tube, while the research on the enhanced heat transfer method by enhancing the secondary flow of the fluid in the tube, lateral turbulence and longitudinal drag reduction but rare

Method used

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  • Multi-directional corrugated inner finned tube
  • Multi-directional corrugated inner finned tube
  • Multi-directional corrugated inner finned tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Such as figure 1 and Figure 4 As shown, the present invention includes an outer tube 1, and a plurality of multidirectional corrugated inner fins 3 are evenly distributed on the inner peripheral surface of the outer tube 1, and the multidirectional corrugated inner fins 3 include a root 4, two straight walls 5 and two Bending 6, multi-directional corrugations 7 are distributed on the two straight walls 5, and the trend of the lines of the multi-directional corrugations 7 on the same straight wall is consistent. The bending 6 is brazed with the inner surface of the outer tube 1, and the straight walls 5 are 1 extends radially, and the outer tube 1 and the multi-directional corrugated inner fins 3 form multiple parallel flow channels.

Embodiment 2

[0057] Such as figure 2 , image 3 and Figure 4 As shown, as an improvement of the present invention, the multi-directional corrugated inner finned tube of the present invention also includes a core tube 2, the core tube 2 is concentrically nested with the outer tube 1, and the tube central axes of the outer tube 1 and the core tube 2 coincide The root 4 of the multi-directional corrugated inner fin 3 is brazed with the outer surface of the core tube 2, and the core tube 2 and multiple multi-directional corrugated inner fins 3 divide the outer tube 1 into several independent parallel flow channels. The core tube 2 serves as a supporting body and becomes a component of the entire multi-directional corrugated inner fin tube, which can enhance the structural strength of the multi-directional corrugated inner fin 3, increase the effective heat transfer area and conduct flow.

[0058] Such as Figure 4 , Figure 5 and Figure 6 As shown, the multi-directional corrugated inne...

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Abstract

The invention provides a multi-directional corrugated inner fin tube, which includes an outer tube, and a plurality of multi-directional corrugated inner fins are evenly distributed on the inner peripheral surface of the outer tube; the multi-directional corrugated inner fins include a root, two A straight wall and two bends, the two straight walls are distributed with multidirectional corrugations, which are consistent with the trend of the multidirectional corrugations on the straight wall; the bends are brazed with the inner surface of the outer tube; The straight wall extends radially along the outer tube; the outer tube and the multi-directional corrugated inner fins form a plurality of parallel flow passages. The multi-directional corrugated inner finned tube provided by the present invention has a variety of structures and is easy to form and process. The flow is intensified, the degree of turbulence is increased, and the boundary layer of the fluid medium is strongly disturbed to achieve the purpose of enhancing heat transfer efficiently. At the same time, the longitudinal flow resistance in the tube is controllable. Compared with ordinary inner finned tubes, the resistance is significantly reduced under the same heat load.

Description

technical field [0001] The invention relates to an enhanced heat transfer heat exchange tube used in heat exchange equipment used in industrial fields such as petroleum, chemical industry, power, nuclear energy, metallurgy, refrigeration, aerospace, environmental protection and energy saving, in particular to a multi-directional corrugated inner fin Tube. Background technique [0002] Energy is related to economic development, national security and social stability, and is an important material basis for human survival and development. With the rapid development of modern industry, the demand for energy is increasing, and the degree of dependence on energy has also increased significantly, and the shortage of energy has become a major bottleneck restricting economic development. At present, all countries in the world are actively looking for new energy sources and developing clean energy sources. It is important to develop new energy sources, but saving energy is a top prio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F1/42
Inventor 凌祥柳林
Owner NANJING TECH UNIV
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