Streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger

A corrugated fin and streamlined technology, applied in the field of round tube fin heat exchanger fins, can solve the problems of poor flow linearity and large flow local resistance

Active Publication Date: 2014-10-22
LANZHOU JIAOTONG UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The circular tube-fin heat exchanger currently uses louver type, slotted type, vortex generator type and other enhanced heat transfer fins, and the flow flow in the channel of the...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger
  • Streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] see figure 1 -2. The present invention includes the circular tube hole 2 on the fin 1 , the ring boss 3 , the stamped streamlined convex corrugation 4 , the concave corrugation 5 and the corrugated shape 6 . The round pipe holes 2 can be arranged in a fork row or in a straight row. The height of the annular boss 3 is equal to the pitch of the fins, which plays the role of positioning the fins. The top of the ring boss 3 is slightly turned outwards with a flanging 7, which is convenient for the fins to pass through the tube and the fins to be positioned. The streamlined convex corrugations 4 (solid lines) and concave corrugations 5 (dotted lines) are alternately distributed between the corrugated region boundaries 8 according to the flow function value of the corrugated region boundaries 8, and are distributed symmetrically about the longitudinal and transverse centerlines of the holes 2 respectively. Both the streamlined convex corrugations 4 and the concave corrugati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Disclosed is a streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger. According to needs of surfaces of extending fins and fluid flow guiding, streamline convex waves 4 and streamline concave waves 5 with integral cross sections in sine/cosine shapes are formed through extrusion on the fins from an air flow inlet to an outlet. Connection lines of the same wave troughs and wave crests are all streamlines. The streamlines are streamlines which enable backflow at tube ends to be avoided in a direction from the tube axis to central cross section in a side channel of a tube fin heat exchanger plate fin corresponding to the fins 1. The streamline convex waves 4 and the streamline concave waves 5 vary according to a needed waveform 16 along longitudinal wave amplitudes, and the wave amplitudes vary in a mode of a needed waveform 17 enveloping wave troughs and crests. The streamline arc-shaped wavy fin can effectively improve streamline of liquid flow, and reduces flow resistance; the convex/concave waves on the surface of the fin increase surface areas of the fin, therefore, the flow resistance is reduced and heat exchange capability of the fin is improved.

Description

technical field [0001] The invention relates to fins of a circular tube-tube-fin heat exchanger, in particular to a streamlined variable-amplitude arc-shaped corrugated fin of a circular tube-tube-fin heat exchanger. Background technique [0002] Round tube, tube and fin heat exchangers are widely used in chemical industry, air conditioning, refrigeration and other industries. During use, generally liquid working medium flows inside the tube, and gas flows outside the tube. The thermal resistance of the gas side accounts for 70%-90% of the total thermal resistance of this type of heat exchanger, which is the main thermal resistance of the heat transfer link. Reducing the thermal resistance of the air side is very important to improve the overall heat transfer performance of the heat exchanger of. In order to further improve the heat transfer performance of the tube-fin heat exchanger, increasing the turbulence of the fluid is an effective measure to improve the heat transf...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F28F1/10
Inventor 苏梅王良璧刘松王良成宋克伟张昆胡万玲张强林志敏郭鹏常立民王天鹏周文和王烨张永恒王小见武祥
Owner LANZHOU JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap