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Superconducting heat transfer medium based on solar vacuum heat collecting tube and preparation method of medium

A vacuum heat collection tube and superconducting heat transfer technology, which is applied in the field of superconducting heat transfer medium and preparation based on solar vacuum heat collection tubes, can solve the problems of low heat transfer efficiency, low service life, poor pressure resistance, etc., and achieve thermal conductivity Good, stable heat transfer rate, and reduced temperature difference

Inactive Publication Date: 2020-01-17
LONGGUANGTIANXU SOLAR ENERGY ZHUCHENG
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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 provide a superconducting heat transfer medium and Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Take 80kg of pure water, 1.4kg of potassium dichromate, 0.2kg of beryllium oxide, 0.9kg of strontium hydride titanate, 1kg of aluminum hydride powder, 0.6kg of boron oxide, and 0.1kg of sodium peroxide. The heat transfer medium of the present invention is prepared according to the above preparation method, and loaded into a solar vacuum heat collection tube, and the volume of the heat transfer medium filled accounts for 1.5% of the inner cavity of the vacuum heat collection tube. After being exposed to the sun for 6 hours on a sunny day in summer, the test thermal conductivity is 98.2%, and the thermal conductivity is 11000W / cm 2 , heat conduction speed 410mm / s.

Embodiment 2

[0021] Embodiment 2: Take 100kg of pure water, 1.2kg of potassium dichromate, 0.6kg of beryllium oxide, 0.5kg of strontium hydride titanate, 3kg of aluminum hydride powder, 0.2kg of boron oxide, and 0.3kg of sodium peroxide. The heat transfer medium of the present invention is prepared according to the above preparation method, and loaded into a solar vacuum heat collection tube, and the volume of the heat transfer medium filled accounts for 2% of the inner cavity of the vacuum heat collection tube. After being exposed to the sun for 6 hours on a sunny day in summer, the test thermal conductivity is 99.3%, and the thermal conductivity is 10500W / cm 2 , heat conduction speed 415mm / s.

Embodiment 3

[0022] Embodiment three: get 85kg pure water, 0.9kg potassium dichromate, 0.7kg beryllium oxide, 0.4kg strontium hydride titanate, 4kg aluminum hydride powder, 0.4kg boron oxide, 0.6kg sodium peroxide. The heat transfer medium of the present invention is prepared according to the above preparation method, and loaded into a solar vacuum heat collection tube, and the volume of the heat transfer medium filled accounts for 3% of the inner cavity of the vacuum heat collection tube. After being exposed to the sun for 6 hours on a sunny day in summer, the test thermal conductivity is 98.9%, and the thermal conductivity is 10300W / cm 2 , heat conduction speed 410mm / s.

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Abstract

The invention discloses a superconducting heat transfer medium based on a solar vacuum heat collecting tube and a preparation method of the medium, and belongs to the technical field of solar heat transfer media. The heat transfer medium is prepared from purified water, potassium dichromate, beryllium oxide, hydrogenated strontium titanate, hydrogenated aluminum powder, boron oxide and sodium peroxide. After testing, the medium has the advantages of high heat transfer efficiency, high pressure resistance, and long service life.

Description

technical field [0001] The invention relates to a superconducting heat transfer medium, in particular to a superconducting heat transfer medium for vacuum heat collecting tubes based on solar energy and a preparation method thereof. Background technique [0002] Solar energy refers to the radiant energy of sunlight. Solar energy is a renewable energy source. In a broad sense, solar energy is the source of many energy sources on the earth, such as wind energy, biomass energy, tidal energy, and potential energy of water. The basic methods of solar energy utilization can be divided into four categories: light-heat utilization, light-electricity use, light-chemical use, and light-biological use. Among the four types of solar energy utilization methods, the light-to-heat conversion technology is the most mature, the products are the most, and the cost is relatively low. For example, solar vacuum tube water heater is currently the light-to-heat conversion device with the widest a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/10F24S80/20
CPCC09K5/10F24S80/20Y02E10/40
Inventor 邢作新钱启伟
Owner LONGGUANGTIANXU SOLAR ENERGY ZHUCHENG
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