Multidirectional 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, strengthening heat transfer, and being easy to manufacture and process.

Active Publication Date: 2013-06-26
NANJING UNIV OF TECH
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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 tu

Method used

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  • Multidirectional corrugated inner finned tube
  • Multidirectional corrugated inner finned tube
  • Multidirectional corrugated inner finned tube

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0054] Example 1.

[0055] Such as figure 1 with Figure 4 As shown, the present invention includes an outer tube 1. A plurality of multi-directional corrugated inner fins 3 are evenly distributed on the inner circumferential surface of the outer tube 1. The multi-directional corrugated inner fin 3 includes a root 4, two straight walls 5 and two Bending 6, there are multi-directional corrugations 7 distributed on the two straight walls 5, which are consistent with the pattern of the multi-directional corrugations 7 on the straight wall. The bending 6 is brazed to the inner surface of the outer tube 1, and the straight wall 5 is along the outer tube. 1 extends radially, and the outer tube 1 and the multi-directional corrugated inner fin 3 form a plurality of parallel circulation channels.

Example Embodiment

[0056] Example 2.

[0057] Such as figure 2 , image 3 with Figure 4 As shown, as an improvement of the present invention, the multi-directional corrugated inner fin 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 axis 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. The core tube 2 and a plurality of multi-directional corrugated inner fins 3 divide the outer tube 1 into several independent parallel flow channels. The core tube 2 serves as a support body and becomes a component of the entire multi-directional corrugated inner fin tube, which plays a role in enhancing the structural strength of the multi-directional corrugated inner fin 3, increasing the effective heat transfer area and diversion.

[0058] Such as Figure 4 , Figure 5 with Image 6 As shown, the multi-direc...

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Abstract

The invention provides a multidirectional corrugated inner finned tube which comprises an outer tube, a plurality of multidirectional corrugated inner fins are uniformly distributed on the inner circumferential face of the outer tube. Each multidirectional corrugated inner fin comprises a root, two straight walls and two bends. Multidirectional corrugated patterns are distributed on the two straight walls, and lines of the multidirectional corrugated patterns on the same straight wall are consistent in tendency. The bends and the inner surface of the outer tube are in a brazing manner. The straight walls extend radially along the outer tube. The outer tube and the multidirectional corrugated inner fins form a plurality of parallel circulating channels. The multidirectional corrugated inner finned tube provided by the invention has various structural patterns and is easy to form and process. Compared with an optical tube, the effective heat transfer area is remarkably increased, so that the flow medium flow pattern in the tube is forcibly guided. The secondary flow is enhanced, the transverse turbulent flow is aggravated, the turbulivity is increased and the boundary layer of a flow medium is strongly interfered, so that the purpose of efficiently enhancing the heat transfer is realized. Meanwhile, the vertical flowing resistance in the tube can be controlled. Compared with the common finned tube, the resistance is remarkably reduced with the same thermal 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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IPC IPC(8): F28F1/42
Inventor 凌祥柳林
Owner NANJING UNIV OF TECH
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