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Fluoroplastic heat exchange structure

A technology of heat exchange structure and fluoroplastics, which is applied in the direction of tubular objects, household appliances, and other household appliances, and can solve the problem that the high thermal conductivity of carbon fiber and the convective heat transfer capacity of carbon fiber do not match the axial thermal conductivity, which is not sufficient. and other problems, to achieve high axial strength and modulus, improve mechanical properties, and good flexibility

Active Publication Date: 2018-11-20
山东志新万成能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the directional arrangement of carbon fibers is only a necessary condition for enhanced heat transfer, but not a sufficient condition
If the carbon fiber / plastic composite heat exchange material is used for the partition heat exchange of fluid, the convective heat transfer capacity on both sides of the heat exchange wall will not match the axial heat conduction capacity of carbon fiber, and the advantages of high thermal conductivity of carbon fiber cannot be brought into play.

Method used

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  • Fluoroplastic heat exchange structure

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Effect test

preparation example Construction

[0040] A fluoroplastic heat exchange structure, and a preparation method thereof, comprising the steps of:

[0041] 1) First, select the commercially available high thermal conductivity carbon fiber tow as the raw material, and the tow is a continuous filament. The thermal conductivity λ and the diameter of the carbon fiber monofilament are measured through experiments. d , tow diameter D value;

[0042] 2) According to the application needs and considering the risk of seal leakage, comprehensively determine the design thickness of the fluoroplastic heat exchange structure matrix t ;

[0043] 3) Carbon fiber distribution density r (percentage), according to substrate thickness t Determined according to the following relationship: r ≥6000× t / λ×100%, and 10%≥ r ≥1%;

[0044] 4) Upper ciliated rib length l hot , according to the substrate thickness t , carbon fiber axial thermal conductivity λ, carbon fiber monofilament diameter d and the convective heat transfer co...

Embodiment 1

[0057] Embodiment 1: choose the Thornel K1100 high thermal conductivity carbon fiber tow of U.S. Amoco Company as raw material, its axial thermal conductivity is 950 W / (m * K), monofilament diameter 6.9 micron, tow diameter 0.56 millimeter; Vinyl fluoride is used as the matrix material, and its design thickness is 0.5 mm; after calculation and judgment, the distribution density of high thermal conductivity carbon fiber tow should be 1%, that is, 4 bundles of carbon fiber tow are evenly distributed on each square centimeter.

[0058] The upper surface of the heat exchange structure is a high-temperature fluid channel, and water is selected as the high-temperature fluid at a temperature of 45 degrees Celsius; under the design condition, the surface convective heat transfer coefficient between the high-temperature fluid and the carbon fiber tow is 2000 W / (m×K), according to According to the calculation of the matching relationship, the length of the upper ciliated rib should be gr...

Embodiment 2

[0071] Embodiment 2: choose the Torayca M40J high thermal conductivity carbon fiber tow of Toray Corporation of Japan as raw material, its axial thermal conductivity is 67 W / (m * K), 7.0 micron of monofilament diameter, 0.88 millimeter of tow diameter; Tetrafluoroethylene is the matrix material, and its design thickness is 0.5 mm; after calculation and judgment, the distribution density of high thermal conductivity carbon fiber tow should be 4.5%, that is, 7.5 bundles of carbon fiber tow are evenly distributed on each square centimeter area.

[0072] The upper surface of the heat exchange structure is a high-temperature fluid channel, and water is selected as the high-temperature fluid at a temperature of 45 degrees Celsius; under the design condition, the surface convective heat transfer coefficient between the high-temperature fluid and the carbon fiber tow is 2000 W / (m×K), according to According to the calculation of the matching relationship, the length of the upper ciliate...

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Abstract

A fluoroplastic heat exchange structure is characterized by comprising a fluoroplastic substrate and high-thermal-conductivity carbon fiber bundles, wherein the plurality of high-thermal-conductivity carbon fiber bundles vertically pass through the upper and lower surfaces of the fluoroplastic substrate and comprise upper and lower cilium ribs extending from the upper and lower surfaces of the fluoroplastic substrate, respectively; and comprising an insertion part inserted in the fluoroplastic substrate. Gaps between carbon fiber bundles located in the insertion part and single carbon fibers in each bundle are tightly filled with fluoroplastics.

Description

technical field [0001] The invention relates to a fluoroplastic heat exchange structure, in particular to a fluoroplastic heat exchange structure which utilizes high thermal conductivity carbon fiber to enhance heat exchange, and belongs to the technical field of enhanced heat exchange. Background technique [0002] Fluoroplastic is not a good heat exchange material, but because of its corrosion resistance and aging resistance, it is often used to make heat exchangers in some special applications. Fluoroplastic heat exchangers have been widely used in flue gas waste heat recovery, seawater desalination, chemical industry, pickling, electroplating, medicine, anodic oxidation and other fields. The thermal conductivity of fluoroplastics is very low, 2 to 4 orders of magnitude worse than that of metals, so the total heat transfer coefficient is only 1 / 5 to 1 / 3 of that of ordinary shell-and-tube heat exchangers. [0003] The thermal conductivity of carbon fiber (CF) is very high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/00B29C67/04B29K27/18B29L23/00B29L31/00
CPCB29C67/04B29C69/001B29K2027/18B29L2023/00B29L2031/18
Inventor 刘志刚梁世强许敏张承武
Owner 山东志新万成能源科技有限公司
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