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Loose fit twisted band ball and tube heat exchanger

A technology of tubular heat exchangers and spherical protrusions, which is applied in the direction of heat exchanger types, heat exchanger shells, indirect heat exchangers, etc., can solve problems such as unsatisfactory heat exchange effects and single enhanced heat exchange means, and achieve Enhanced thermal effect and avoid configuration conflict

Active Publication Date: 2017-02-08
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a loose-fit twisted-band bulb-and-tube heat exchanger, which solves the problem that the existing heat exchanger mostly adopts a single enhanced heat exchange method, and the heat exchange effect is not ideal

Method used

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  • Loose fit twisted band ball and tube heat exchanger
  • Loose fit twisted band ball and tube heat exchanger
  • Loose fit twisted band ball and tube heat exchanger

Examples

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specific Embodiment approach 1

[0027] Specific implementation plan one: (refer to Figure 4 ) What this embodiment describes is the geometric model of the built-in loose-fit twisted-band bulbous tube. The inner diameter D of the tube is 20 mm, and the protrusion distance is 50 mm. The 180° torque y=50mm and the twist width w=18mm of the interpolated twisted ribbon. Compared with the light tube combined with the inserted twisted band, the bulbous tube combined with the inserted twisted band has more spherical protrusions on the wall surface, and the protrusion depth is H=1mm. The clearance ratio between the tube wall and the twisted band in this embodiment is C=0.1.

specific Embodiment approach 2

[0028] Specific implementation plan two: (refer to Figure 5 ) The difference between this embodiment and the first embodiment is that the twist width w=16mm, the clearance ratio C=0.2, and other structures are the same as the first embodiment.

specific Embodiment approach 3

[0029] Specific implementation plan three: (refer to Figure 6) The difference between this embodiment and the first embodiment is that the twist width w=14mm, the clearance ratio C=0.3, and other structures are the same as the first embodiment.

[0030] Advantage of the present invention has:

[0031] (1) The built-in slack fit twist-band bulb-and-tubular heat exchanger of the present invention adopts the composite enhanced heat transfer technology under the synergy of the surface base and the fluid base, combined with the classical enhanced heat transfer theory of thermal boundary layer destruction, making it different from the traditional Compared with the rough surface or internal turbulence alone, it has better heat transfer performance.

[0032] (2) The built-in loose fitting twisted band bulb-and-tube heat exchanger of the present invention can greatly reduce the flow resistance due to the existence of the clearance rate compared with the tightly fitted twisted band, t...

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Abstract

The invention discloses a tubular heat exchanger with twisted strips in relaxation fit with protruding tubes. According to the tubular heat exchanger with the twisted strips in relaxation fit with the protruding tubes, the inner walls of the two ends of a shell are respectively provided with a tube plate, a thermal medium inlet pipe is arranged on the top of one end of the shell, a thermal medium outlet pipe is arranged on the bottom of the other end of the shell, horizontal partition boards are arranged in the shell, a cold medium inlet pipe is arranged on the top of one end of the shell, a cold medium outlet pipe is arranged on the bottom of the end of the shell, multiple baffle plates are arranged inside the shell in the pipe diameter direction and are installed on the inner wall of the shell in a vertically staggered mode, so that a vertically-staggered airflow channel is formed inside the shell from one end to the other end, multiple tube bundles are arranged in the shell in the axial direction, the two ends of each tube bundle are both fixed into tube plate holes in the tube plates, the tube bundles penetrate through the baffle plates and are supported by the baffle plates, and the tube bundles are formed by the protruding tubes in relaxation fit with the twisted strips. The tubular heat exchanger with the twisted strips in relaxation fit with the protruding tubes has the advantages that the heat exchange enhancement method achieved by enhancing surface roughness and the heat exchange enhancement method achieved by adopting far wall-surface flow disturbing elements are combined, and therefore the heat exchange effect is improved.

Description

technical field [0001] The invention belongs to the technical field of thermal equipment, and relates to a loose-fit twisted-band ball-and-tube heat exchanger. Background technique [0002] Enhanced heat transfer technology is widely used in petroleum, chemical industry, electric power, metallurgy, shipbuilding, machinery, heating, food and refrigeration and other fields. Typical application equipment includes heat exchangers, air conditioners, chemical reaction equipment and refrigeration equipment. Passive enhanced heat transfer, as one of the important enhanced heat transfer technologies, can effectively improve the heat transfer efficiency of equipment, reduce equipment size and reduce its cost. The development of high-efficiency heat exchange elements is the core technology of passive heat exchange enhancement. In-depth study of the internal mechanism and law of its flow and heat transfer has important practical significance for the design and optimization of heat excha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D7/16F28F1/42F28F9/24
Inventor 韩怀志孙宝芝宋思明张鹏杨龙滨李彦军张国磊李晓明
Owner HARBIN ENG UNIV
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