Intensified heat exchange tube provided with spiral grooved tube with spiral fin inserted inside

A technology of spiral finned tubes and spiral fins, which is applied in the field of enhanced heat transfer and heat transfer tubes, can solve problems such as flow resistance limits, and achieve the effects of small flow resistance, enhanced turbulence, and improved heat transfer coefficient

Inactive Publication Date: 2015-11-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially the spiral groove tube has been widely used in engineering, but with the development of the industry and the proposal of energy saving and emission reduction, the heat transfer performance of the spiral groove tube needs to be further improved, and its flow resistance is the limit value for further development the bottleneck

Method used

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  • Intensified heat exchange tube provided with spiral grooved tube with spiral fin inserted inside
  • Intensified heat exchange tube provided with spiral grooved tube with spiral fin inserted inside
  • Intensified heat exchange tube provided with spiral grooved tube with spiral fin inserted inside

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Embodiment Construction

[0015] Such as figure 1 As shown, the enhanced heat exchange tube of the present invention with inserted spiral-finned and spiral-grooved tubes includes reserved smooth tubes 4, spiral-finned tubes 8 and spiral-grooved tubes 7 connected in sequence, and the joints are sealed. The reserved light pipe 4 is used to install the enhanced heat exchange tube on cooling equipment such as EGR cooler, and communicates with the inlet 3 of the cooled medium of the cooling equipment; both the spiral finned tube 8 and the spiral grooved tube 7 are used to enhance the turbulence , enhanced heat exchange; the present invention introduces the spiral finned tube 8 on the basis of the spiral grooved tube 7, reduces the flow resistance, and enhances the turbulence effect.

[0016] As a common technical means in this field, the inner wall surface of the spiral grooved pipe 7 is composed of one or more combinations of smooth surface, spiral groove surface and rib wall surface. The outer wall surfa...

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Abstract

The invention discloses an intensified heat exchange tube provided with a spiral grooved tube with a spiral fin inserted inside. The intensified heat exchange tube comprises a reserved unthreaded tube, a spiral finned tube and the spiral grooved tube which are connected sequentially. The spiral finned tube is composed of the unthreaded tube and the spiral fin welded into the unthreaded tube, the width of the fin is 0.3-0.4 times the inner diameter of the unthreaded tube, and the total length of the fin is equal to the screw pitch length of 1-2 fin spiral lines. The spiral fin enables turbulent flow of the spiral groove tube section to be greatly enhanced, and reduces flowing resistance. When the spiral fin is matched with the spiral grooved tube, the heat exchange coefficient is higher than that of the spiral grooved tube by 3% to 10%, and the flowing resistance is reduced by 16% to 30%. The tube section with the fin inserted inside of the heat exchange tube with the spiral fin inserted inside is independently machined, small in length, convenient to wash and small in material consumption, saves space, can be matched with various tube sections of different types and has quite important engineering application value to further development of the intensified heat exchange tube.

Description

technical field [0001] The invention relates to the field of enhanced heat exchange and heat exchange tubes, in particular to an enhanced heat exchange tube with inserted spiral fins and spiral grooved tubes. Background technique [0002] Shell and tube heat exchanger is a kind of heat exchanger, which is widely used in petroleum, chemical industry, textile, metallurgy, electronics, telecommunications and other industrial sectors. The water cooler involved in the present invention belongs to the shell-and-tube heat exchanger, and the side flow rate of the miniature finger tube is less than 20kg / min. It is suitable for heat exchangers in exhaust gas recirculation systems and turbocharging systems in the automotive field, such as EGR coolers, intercooler etc. The circular cross-section light tube is the heat exchange tube commonly used in shell and tube heat exchangers, but the light tube has the disadvantages of large volume, many consumables, and difficulty in meeting the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/40
Inventor 袁博郝志勇
Owner ZHEJIANG UNIV
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