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Solar heat collecting tube and preparation method and purpose thereof

A technology of solar heat collecting tubes and heat collecting tubes, which is applied in the field of solar light energy and heat utilization, can solve the problems of inconvenient sealing and processing, heat loss of unsafe heat collecting tubes, etc., and achieve excellent corrosion resistance, stable product quality, and good thermal stability Effect

Inactive Publication Date: 2017-08-18
周玉春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, to provide a medium-high temperature solar heat collecting tube and its preparation method and application, to overcome the inconvenient and unsafe sealing process of the solar heat collecting tube in the prior art and the heat loss of the formed heat collecting tube. Defects

Method used

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  • Solar heat collecting tube and preparation method and purpose thereof
  • Solar heat collecting tube and preparation method and purpose thereof
  • Solar heat collecting tube and preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The glass outer tube described in this embodiment contains the following raw material components and parts by weight:

[0052]

[0053] The cullet contains the following raw material components and parts by weight:

[0054]

[0055]

[0056] The metal inner tube is made of stainless steel. The metal inner tube is 304 stainless steel tube.

[0057] The model of the Kovar alloy is that the alloy of the Kovar alloy ring is Fe-Ni-Co hard glass. According to the GB / T4339-2008 standard, the average coefficient of linear expansion of the Kovar alloy at 20-400°C is 4.047×10 -6 / °C.

[0058] Based on the total mass of the Fe-Ni-Co hard glass, the chemical composition of the Fe-Ni-Co hard glass is as follows:

[0059] Ni 31.3~31.8%

[0060] Co 18.1~18.6%

[0061] The balance is iron.

[0062] Based on the total mass of the Fe-Ni-Co hard glass, the content of Al in the Fe-Ni-Co hard glass is not more than 0.10%, the content of Mg is not more than 0.10%, and the con...

Embodiment 2

[0071] The glass outer tube described in this embodiment contains the following raw material components and parts by weight:

[0072]

[0073]

[0074] The cullet contains the following raw material components and parts by weight:

[0075]

[0076] The metal inner tube is made of stainless steel. The metal inner tube is 304 stainless steel tube.

[0077] The model of the Kovar alloy is that the alloy of the Kovar alloy ring is Fe-Ni-Co hard glass. According to the GB / T4339-2008 standard, the average coefficient of linear expansion of the Kovar alloy at 20-400°C is 4.047×10 -6 / °C.

[0078] Based on the total mass of the Fe-Ni-Co hard glass, the chemical composition of the Fe-Ni-Co hard glass is as follows:

[0079] Ni 31.3~31.8%

[0080] Co 18.1~18.6%

[0081] The balance is iron.

[0082] Based on the total mass of the Fe-Ni-Co hard glass, the content of Al in the Fe-Ni-Co hard glass is not more than 0.10%, the content of Mg is not more than 0.10%, and the con...

Embodiment 3

[0091] The glass outer tube described in this embodiment contains the following raw material components and parts by weight:

[0092]

[0093] The cullet contains the following raw material components and parts by weight:

[0094]

[0095]

[0096] The metal inner tube is made of stainless steel. The metal inner tube is 304 stainless steel tube.

[0097] The model of the Kovar alloy is that the alloy of the Kovar alloy ring is Fe-Ni-Co hard glass. According to the GB / T4339-2008 standard, the average coefficient of linear expansion of the Kovar alloy at 20-400°C is 4.047×10 -6 / °C.

[0098] Based on the total mass of the Fe-Ni-Co hard glass, the chemical composition of the Fe-Ni-Co hard glass is as follows:

[0099] Ni 31.3~31.8%

[0100] Co 18.1~18.6%

[0101] The balance is iron.

[0102] Based on the total mass of the Fe-Ni-Co hard glass, the content of Al in the Fe-Ni-Co hard glass is not more than 0.10%, the content of Mg is not more than 0.10%, and the con...

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Abstract

The invention relates to a solar heat collection tube, the heat collection tube includes a glass outer tube, a metal inner tube, a Kovar alloy ring, and a corrugated tube; the metal inner tube is arranged in the glass outer tube and is coaxial with the glass outer tube The two ends of the glass outer tube are sealed with Kovar alloy rings; the bellows are arranged at both ends of the glass outer tube, and are interposed between the metal inner tube and the glass outer tube. Due to the similar thermal expansion coefficients of the glass outer tube and the metal inner tube described in this application, a matching seal can be achieved during high temperature fusion sealing, and the internal stress at the seal is small. After cooling, the glass outer tube and the Kovar alloy No cracking or deformation between the rings. The sealing of metal and glass is realized, and the results of vacuum measurement and thermal shock test show that it has high temperature resistance, high air tightness and high reliability.

Description

technical field [0001] The invention relates to the technical field of solar light energy thermal utilization, and mainly relates to a high-temperature heat collecting tube used in a trough solar thermoelectric system. Background technique [0002] In the technology of solar thermal energy utilization, the heat collecting tube is the core component of the trough solar power station. The typical structure of the vacuum heat collecting tube in the prior art includes a metal inner tube coated with a heat absorbing material layer on the surface and a metal tube installed outside the inner tube. The glass outer tube; the two are fixed and make the interlayer between the glass outer tube and the metal inner tube a vacuum. The vacuum layer can improve the thermal insulation effect of the glass inner tube, so that the solar heat accumulated in the glass inner tube can be transferred to the working material in the tube as much as possible, so as to improve the working efficiency of t...

Claims

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Application Information

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IPC IPC(8): F24J2/46C03C6/06C03C27/02
CPCY02E10/40C03C1/002C03C1/00C03C27/02F24S80/10F24S2080/01
Inventor 周玉春夏刚刚
Owner 周玉春
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