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Intensified heat exchange tube with intersectional zoomed sections of circle-ellipse

An elliptical cross-section, elliptical tube technology, applied in heat exchange equipment, tubular elements, lighting and heating equipment, etc., can solve the problems of troublesome design and manufacture of heat exchangers, poor pressure resistance of elliptical tubes, small flow resistance, etc. Heat transfer enhancement performance, wide application range, small flow resistance effect

Inactive Publication Date: 2005-02-23
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patented technology still has obvious deficiencies, mainly: 1. The flow resistance can be smaller; 2. The pressure resistance of the elliptical tube is poor, which limits its application under high pressure; When manufacturing heat exchangers, the design and manufacture of baffles or baffle rods in the heat exchanger is somewhat troublesome due to the direction of the elliptical tube section.

Method used

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  • Intensified heat exchange tube with intersectional zoomed sections of circle-ellipse
  • Intensified heat exchange tube with intersectional zoomed sections of circle-ellipse
  • Intensified heat exchange tube with intersectional zoomed sections of circle-ellipse

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Embodiment Construction

[0012] The specific structure of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0013] figure 1 It is a structural schematic diagram of a circle-ellipse section cross-scaling enhanced heat exchange tube provided by the present invention. The enhanced heat exchange tube is composed of several circular tube sections 1, elliptical tube sections 2, circular-elliptical transition sections 3 and inlet circular tube sections 4 at both ends. The length Lc of the circular pipe section is determined according to the requirements of pressure resistance, flow resistance, and installation of baffles or baffle rods. Generally, Lc / d=0.5~10, where d is the inner diameter of the circular pipe. The lengths of each circular pipe section can be equal or unequal. The length Lo of the round tube section at both ends can be 2 to 4 times the thickness of the tube sheet, depending on the needs of its assembly with the tube sheet, and take the...

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Abstract

Round-ellipse section cross convergent-divergent uprated heat exchange tube is composed of several round, and round-ellipse change over sections, the said round and ellipase sections are arrayed in sequence periodically, the ellipse long shafts of adjacent ellipse sections form 1.5-90 deg. angle. Advantages: small flow resistance, velocity field and temperature gradient have better cooperation level, so as to have better heat conduction uprated performance and more convenient for processing baffle boards and rods. This invention can be used either in single phase fluide heat conduction or in flow boiling, flow cooling phase conversion intensifications.

Description

Technical field: [0001] The invention relates to an enhanced heat transfer element, in particular to a circle-ellipse section cross-scaling enhanced heat exchange tube, which belongs to the technical field of heat transfer enhancement and heat exchangers. Background technique: [0002] Heat transfer enhancement technology has been widely used in engineering because of its ability to increase heat transfer rate and save energy. It can generally be divided into active reinforcement and passive reinforcement techniques. The former refers to the heat transfer enhancement technology that requires energy input from the outside, such as electric field enhancement, magnetic field enhancement, vibration enhancement technology, etc.; the latter refers to the heat transfer enhancement technology that does not require external energy, so it is easier to be used in engineering. Passive reinforcement techniques typically include extended surfaces (fins), in-tube inserts, swirl (turbulenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F1/00
CPCF28F1/006
Inventor 过增元孟继安胡桅林李志信
Owner TSINGHUA UNIV
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