Unlock instant, AI-driven research and patent intelligence for your innovation.

Back-turning flow plate-fin heat exchanger

A technology of a fin heat exchanger and a return flow plate, applied in the field of plate fin heat exchanger, can solve the problems of large space occupation, short service life, increased production cost, etc., to save space occupation, reduce manufacturing cost and Maintenance cost, efficiency improvement effect

Active Publication Date: 2013-08-21
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with a single plate-fin heat exchanger, the plate-fin heat exchanger group has significant disadvantages in application, such as: low average heat transfer efficiency, significantly increased production cost, large space occupation, complicated and difficult manufacturing process, and Shorter service life and higher failure rate due to more welded joints and connecting pipes

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
  • Back-turning flow plate-fin heat exchanger
  • Back-turning flow plate-fin heat exchanger
  • Back-turning flow plate-fin heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The cross-sectional area of ​​the overall heat exchange core 10 decreases stepwise from the high temperature end A to the low temperature end B:

[0040] In this embodiment, the width of the first horizontal heat exchange section 111 is 100mm, the width of the first vertical heat exchange section 121 is 95mm, the width of the second horizontal heat exchange section 112 is 90mm, and the width of the second vertical heat exchange section 122 has a width of 85mm, the third horizontal heat exchange section 113 has a width of 80mm, the third vertical heat exchange section 123 has a width of 75mm, the fourth horizontal heat exchange section 114 has a width of 70mm, and the fourth vertical heat exchange section 124 has a width of 65 mm, and the fifth horizontal heat exchange section 115 has a width of 60 mm.

Embodiment 2

[0042] The cross-sectional area of ​​the overall heat exchange core decreases gradually from the high temperature end A to the low temperature end B:

[0043] In this embodiment, for the convenience of description, it is defined that the fluid flow is closer to A as the start end, and the fluid flow is closer to B as the end end.

[0044] The width of the starting end of the first horizontal heat exchange section 111 is 100 mm, and the width of the ending end is 95 mm; the width of the starting end of the first vertical heat exchange section 121 is 95 mm, and the width of the ending end is 90 mm; The width of the starting end is 90 mm, and the width of the ending end is 85 mm; the width of the starting end of the second vertical heat exchange section 122 is 85 mm, and the width of the ending end is 80 mm; the width of the starting end of the third horizontal heat exchange section 113 is 80 mm, and the width of the ending end is 75mm; the width of the start end of the third ver...

Embodiment 3

[0046] The cross-sectional area of ​​the horizontal heat exchange section and the vertical heat exchange section of the heat exchange core decreases stepwise from the high temperature end A to the low temperature end B:

[0047] In this embodiment, the width of the first horizontal heat exchange section 111 is 120 mm, the width of the second horizontal heat exchange section 112 is 110 mm, the width of the third horizontal heat exchange section 113 is 100 mm, and the width of the fourth horizontal heat exchange section 114 The width is 90 mm, and the width of the fifth horizontal heat exchange section 115 is 80 mm. The width of the first vertical heat exchange section 121 is 80mm, the width of the second vertical heat exchange section 122 is 70mm, the width of the third vertical heat exchange section 123 is 60mm, and the width of the fourth vertical heat exchange section 124 is 50mm.

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

The invention provides a back-turning flow plate-fin heat exchanger. A heat exchange core body is connected with a high temperature end and a low temperature end. The heat exchange core is composed of a plurality of horizontal heat exchange sections and a plurality of vertical heat exchange sections in a snake-shaped perpendicular series connecting mode. One connecting mode or combination of multiple connecting modes is adopted, so that the combined portions of horizontal heat exchange sections and the vertical heat exchange sections are connected in a butt joint mode through heat transfer fins with the overlapped portions cut, or through discrete type heat transfer fins which are arranged on the corner portions, or through a rectangle formed by triangular heat transfer fins. The width of a channel of each horizontal heat exchange section is gradually reduced from the high temperature end to the low temperature end. The width of a channel of each vertical heat exchange section is gradually reduced from the high temperature end to the low temperature end. The widths of the channels of the heat exchange sections are designed to be different according to change of temperature, flow speed of fluid is adjusted, the efficiency of a heat exchanger is improved, occupied space is saved due to the series connection match mode of the horizontal heat exchange sections and the vertical heat exchange sections, and manufacturing cost and maintaining cost are obviously reduced as well.

Description

technical field [0001] The invention relates to a plate-fin heat exchanger, in particular to a reflux flow plate-fin heat exchanger. Background technique [0002] The plate-fin heat exchanger has the characteristics of compact structure and high heat transfer efficiency. Compared with the traditional shell-and-tube heat exchanger, its heat transfer efficiency is increased by 20-30%, and the cost can be reduced by 50%. It has been widely used in air Separation, petrochemical, aerospace and other fields. [0003] Limited by the characteristics of the plate-fin heat exchanger itself and the current welding process and production level, for a specific heat exchanger, the width of the heat exchange core remains constant, but the average density of the internal fluid is within the range of the heat exchange core. There is often a significant difference between the inlet and the outlet, and the corresponding fluid volume flow. This will cause the flow velocity of the fluid inside...

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
Patent Type & Authority Applications(China)
IPC IPC(8): F28D9/00F25B39/00
Inventor 公茂琼吴剑峰陈高飞
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI