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Intensified heat transfer pipe

A heat transfer tube and tube body technology, applied in the field of strengthening heat transfer tubes, can solve problems that have not yet been seen, and achieve the effects of improving the heat transfer coefficient, increasing the number, and improving the distribution of the thickness of the liquid film.

Active Publication Date: 2009-10-28
JIANGSU CUILONG PRECISION COPPER TUBE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there has not been seen in the published literature that the structure of the outer fins outside the heat exchange tubes of the evaporator and condenser can reflect the technical inspiration of significantly improving the heat coefficient of phase transformation

Method used

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  • Intensified heat transfer pipe
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  • Intensified heat transfer pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] please see figure 1 , on the outer wall of the tube body 1 with inner fins 17, the outer fins 2 are formed and rolled at one time, and a kind of enhanced heat transfer tube is produced. The outer fins 2 are made of the material on the tube body 1 along the radial direction of the tube body 1. It is formed by extending outward and is an integral structure with the tube body 1. There is a contact thermal resistance between them. The outer fins 2 extend spirally around the tube body 1 on the outer surface of the tube body 1; the rolled outer fins 2 At the same time, dense micro-scale grooves 3 are processed by the cutter on the side surface of the outer fin 2, and these micro-scale grooves 3 are micro-scale groove grooves 9 ( image 3 , Figure 4 Shown) a cluster of dense curves drawn when relative to the outer fin 2 is rotated. On both sides of the outer fin 2, this cluster of curves forms a grid-like structure. The micro-scale channels of the grid-like structure 3 The ...

Embodiment 2

[0032] please see image 3 and Figure 6 , equipped with an outer fin slotting knife 7, an outer fin forming knife 8 and a micro-scale slot slotting knife 9, and this group of knives is installed on the tool holder 16 (also called a knife shaft), wherein the micro-scale slot The edge of the slotting knife 9 is evenly provided with a plurality of knife edges 10 ( Figure 6 Shown), the outer fins 2 are processed and formed on the tube body 1 by an extrusion method, and the typical size is that the diameter of the tube body 1 at the root of the outer fins 2 is 20 mm. During the relative rotation between the tube body 1 and the above-mentioned cutter, the outer fin 2 with a height of 2mm is formed by the outer fin slotting knife 7 and the outer fin forming knife 8, and at the same time, the micro-scale channel slotting knife 9 The knife edge 10 ( Figure 6 (shown) on the side of the outer fin 2, regular micro-scale grooves 3 with a groove width of 0.08mm, a groove depth of 0.05...

Embodiment 3

[0046] please see Figure 4 and Figure 5 and combine figure 2 , to be made as a condenser tube and consist of figure 2 The schematic enhanced heat transfer tube of the present invention is taken as an example.

[0047] The specific structure includes a tube body 1, an outer fin 2 formed on the outer wall of the tube body 1, a groove 4 is cut out on the outer fin 2, a tooth platform 5 is formed between two adjacent grooves 4, and the groove 4 The depth of the outer fin 2 is less than the height of the outer fin 2. The groove 4 and the tooth platform 5 form the outer fin 2 in a zigzag shape. There are 1 to 2 lines on the surface of the tooth platform 5 opposite to the groove 4 from the root of the tooth platform 5 to the top. Extended curved micro-scale channel 6 ( Figure 5 (shown) and on the side surfaces of both sides of the outer fin 2 there are micro-scale grooves 3, the height of the outer fin 2 is 1.2 mm, the height of the gear table 5 is 0.8 mm, the micro-scale gr...

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Abstract

An enhanced heat transfer tube belongs to the technical field of heat exchange components. It includes a tube body and an outer fin integrally formed with the tube body formed by extending the material on the tube body along the radial direction of the tube body and spirally extending around the tube body on the outer surface of the tube body. Micro-scale grooves are formed on at least one side surface of the outer fin. Advantages: Since micro-scale channels are formed on at least one side surface of the outer fin, it helps to increase the heat exchange area on the surface of the outer fin and improve the disturbance of the fluid, and strengthen the forced convection outside the tube Heat exchange, so that the heat transfer coefficient is significantly improved; when the enhanced heat transfer tube of the present invention is used in the evaporator, the micro-scale channel can greatly increase the number of vaporization cores, so that the boiling heat transfer can be enhanced under the condition of low heat flux; When the enhanced heat transfer tube of the present invention is used in a condenser, the micro-scale channels can improve the distribution of the thickness of the liquid film on the surface of the outer fins, so that the condensation heat exchange can be enhanced.

Description

technical field [0001] The invention relates to an enhanced heat transfer tube, which is used as a heat exchange component of an evaporator and a condenser in a refrigeration and air-conditioning system, and belongs to the technical field of heat exchange components. Background technique [0002] In the fields of refrigeration, air conditioning, process engineering, petrochemical industry, and energy and power engineering, etc., the boiling or condensation of liquid on the outer surface of the tube bundle is involved. Especially for evaporators and condensers used in refrigeration and air-conditioning systems, the thermal resistance of phase change when the refrigerant boils or condenses outside the tube is equivalent to or even greater than the thermal resistance of forced convection heat transfer inside the tube. Therefore, strengthening the phase change heat outside the tube can play a significant role in improving the heat transfer performance of the evaporator and conde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F1/42
Inventor 陆明华张春明罗行周浩平
Owner JIANGSU CUILONG PRECISION COPPER TUBE CORP
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