CN103994685A

CN103994685A - Novel plate-fin type heat exchanger fin

Info

Publication number: CN103994685A
Application number: CN201410227894.8A
Authority: CN
Inventors: 李晓宁; 舒歌群; 李团兵; 田华; 王轩
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2014-05-27
Filing date: 2014-05-27
Publication date: 2014-08-20

Abstract

The invention discloses a novel plate-fin type heat exchanger fin. The novel plate-fin type heat exchanger fin comprises corrugated fins, wherein the corrugated fins are slotted and are broken at the positions of half unit wavelength. The novel plate-fin type heat exchanger fin has the advantages of having the advantages of both the corrugated fins and slotted fins. Gaps exist, fluid can pass through the gaps in the heat exchange process, and runners are almost in a corrugated type, so that compared with the slotted fins and the corrugated fins separately, the novel plate-fin type heat exchanger fin has the advantages that the flowing mode is more turbulent, the intensity of turbulent flow is increased, a heat exchange boundary layer can be destroyed effectively, the heat exchange performance of a heat exchanger is improved greatly, materials are saved, and weight of the heat exchanger is decreased.

Description

A kind of novel plate-fin heat exchanger fin

Technical field

The present invention relates to the technical field of heat exchanger, be specifically related to a kind of fin structure of heat exchanger.

Background technology

Plate-fin heat exchanger is considered to one of the most rising Novel hot switching equipment because of its compact conformation, the feature that light and handy, heat transfer efficiency is high.Along with the raising of non-ferrous metal and stainless steel preservative treatment technology and soldering processes technology, in the industrial departments such as petrochemical industry, aviation, automobile making, dynamic power machine, air separation plant, profound hypothermia field, be all widely applied in recent years, be especially widely used at construction machinery industry.Although the heat exchange property of plate-fin heat exchanger has obtained people's accreditation, people do not abandon the pursuit of the heat exchanger to better heat exchange property all the time.The efficient fin of development of new is the important process of field of heat exchangers always.Current plate-fin heat exchanger fin structure mainly contains continuous plain fin, corrugated fin, and stagger arrangement saw tooth fin.Wherein the pressure drop of plain fin form is less, but the coefficient of heat transfer is also less; Corrugated fin and the stagger arrangement saw tooth fin coefficient of heat transfer are larger, but pressure drop is larger.

Summary of the invention

The object of the invention is to overcome the shortcoming of prior art, a kind of novel plate-fin heat exchanger fin of one of the heat exchange property that can greatly improve heat exchanger is provided.

In order to achieve the above object, the technical solution used in the present invention is:

The novel plate-fin heat exchanger fin of one of the present invention, it comprises corrugated fin, the disconnection of cracking in the position of half unit wavelength of described corrugated fin.

The invention has the advantages that: the advantage that can simultaneously have corrugated fin and slitted fin concurrently, due to the existence in gap, fluid can pass through between gap in heat transfer process, and adding runner is ripple type haply, so, compare with rippled fin with single slitted fin, can make liquid form more disorderly, increase turbulent intensity, can effectively destroy Heat transfer boundary layer, greatly improve the heat exchange property of heat exchanger, can save again material, alleviate the weight of heat exchanger simultaneously.

Brief description of the drawings

Fig. 1 is the two-dimensional structure schematic diagram of a kind of novel plate-fin heat exchanger fin of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of a kind of novel plate-fin heat exchanger fin of the present invention.

Detailed description of the invention

Describe the present invention below in conjunction with specific embodiment.

The novel plate-fin heat exchanger fin of one of the present invention as shown in drawings, it comprises corrugated fin 1, the disconnection of cracking in the position of half unit wavelength of described corrugated fin.

The wavelength d2 of preferred unit ripple is 8-15mm, and the wave amplitude A of described unit ripple is 1.5-2.0mm, and the pitch s of fin is 4.5-6mm.The thickness d 1 of fin is 0.2-0.5mm; The height h of fin is 6-12mm.Can obtain higher heat transfer coefficient at this scope inner fin, lower pressure drop level.In addition, in fin machining process, change less to traditional processing mold.

Lift a specific embodiment below:

Fin configuration is the corrugated fin cracking, and cracks with every half unit Bo Wei unit, and fluid can flow through in stitching.

The wavelength of each unit ripple is d2=15mm.

The wave amplitude of unit ripple is A=2.0mm.

The pitch s=6mm of fin.

The thickness d 1 of fin is 0.5mm; The height h of fin is 9.5mm.

The present embodiment with fin thickness, highly, unit wavelength, wave amplitude, pitch all identical conventional continuous wave pattern fin compare, in the time reaching same pressure drop level, can make the coefficient of heat transfer improve 10-20%, fin weight saving is more than 5%.

Claims

1. a novel plate-fin heat exchanger fin, it comprises corrugated fin, it is characterized in that: the disconnection of cracking in the position of half unit wavelength of described corrugated fin.

2. novel plate-fin heat exchanger fin according to claim 1, it is characterized in that: the wavelength of unit ripple is 8-15mm, the wave amplitude of unit ripple is 1.5-2.0mm, and the pitch of fin is 4.5-6mm, the thickness of fin is 0.2-0.5mm, and the height of fin is 6-12mm.