Twisted tooth finned tube and finned tube heat exchange tube bundle

A technology of twisted finned tubes and finned tubes, which is applied in the field of finned tubes, can solve the problems of weak disturbance effect, poor heat transfer capacity enhancement effect of fin surface, and limited heat transfer enhancement effect of serrated spiral finned tubes, etc. Achieve the effect of increasing the finning ratio and reducing the difficulty of manufacturing

Inactive Publication Date: 2014-12-31
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly due to the fact that the sawtooth has a weak disturbance to the airflow outside the substrate tube, so the enhancement effect on the heat transfer capacity of th...

Method used

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  • Twisted tooth finned tube and finned tube heat exchange tube bundle
  • Twisted tooth finned tube and finned tube heat exchange tube bundle
  • Twisted tooth finned tube and finned tube heat exchange tube bundle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] figure 1 It is a schematic structural view of the heat exchange tube bundle of finned tubes in Embodiment 1 of the present invention.

[0051] Such as figure 1 As shown, the finned tube heat exchange tube bundle 100 arranged in a staggered arrangement has three twisted finned tubes 200 arranged in two rows.

[0052] figure 2 It is a structural schematic diagram of the twisted-tooth finned tube in Embodiment 1 of the present invention.

[0053] Such as figure 2 As shown, the twisted finned tube 200 includes: a base tube part 1 and a finned part 2 .

[0054] The base pipe part 1 is in the shape of a circular pipe, and is filled with a flowing heat-exchange working medium. The fin portion 2 surrounds the outer wall of the base pipe portion 1 .

[0055] According to different applications, the diameter range of the base pipe part 1 can be between 10 mm and 1000 mm, and the radial length range of the fin part 2 can be between 5 mm and 200 mm. In order to obtain a lar...

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PUM

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Abstract

The invention discloses a twisted tooth finned tube and a finned tube heat exchange tube bundle. The twisted tooth finned tube provided by the invention comprises a base tube part and a fin part, wherein the fin part comprises a substrate which is fixedly arranged on the outer wall along a preset path and is continuously formed, a plurality of twisted teeth which are connected to the substrate and outwards extend along the radial direction of a base tube, and a plurality of opening slots which are formed between every two adjacent twisted teeth along the direction of the preset path; the bottom ends of the twisted teeth are integrally connected with the substrate; the top ends of the twisted teeth are twisted by certain angles relative to the bottom ends of the twisted teeth. With the structure of the fin part, the finning ratio of the finned tube is greatly increased, and the manufacturing difficulty of the finned tube is reduced; moreover, the top ends of the twisted teeth are twisted by certain angles relative to the bottom ends of the twisted teeth, so that the disturbance and heat exchange of fins to air flow outside the tube are greatly enhanced; therefore the twisted tooth finned tube is excellent in enhanced heat exchange performance.

Description

technical field [0001] The invention relates to a finned tube, in particular to a twisted toothed finned tube and a finned tube heat exchange tube bundle. Background technique [0002] Annular finned tubes made of round tubes with additional annular fins are widely used in engineering heat exchange devices. Common annular finned tubes include spiral finned tubes and sleeved finned tubes. The spiral finned tube is formed by spirally winding strip-shaped metal fins on the surface of the base tube, and the sleeved finned tube is formed by unconnected annular fins arranged at a certain distance along the tube axis and connected with the base tube. Spiral finned tubes and sleeved finned tubes are easy to manufacture and have relatively large fins, which can significantly reduce the heat transfer resistance of the airflow side outside the tubes, so they are widely used in various airflow heat exchange devices. According to the basic principle of finned tube enhanced heat transfer...

Claims

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Application Information

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IPC IPC(8): F28F1/36
Inventor 马有福
Owner UNIV OF SHANGHAI FOR SCI & TECH
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