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Porous anodic aluminum oxide cooling material, preparation method and application thereof to solar panel cooling

A technology of porous anode and aluminum oxide, which is applied in anodic oxidation, circuit, electrolytic coating, etc., can solve the problems of power generation efficiency decline, solar panel power generation power decline, and array service life reduction, so as to improve efficiency, reduce temperature, and improve The effect of impedance matching

Inactive Publication Date: 2020-05-05
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]Photovoltaic technology is one of the most important measures to solve energy and environmental problems at present, but solar power generation has the problems of high cost and low conversion efficiency
The operating temperature of crystalline silicon solar cells with the largest market share increases by 1°C, and its relative power generation efficiency decreases by about 0.45%, and the aging speed of the array will double for every increase of 10°C
Due to the change of the external environment temperature and the heat generated by the panel during the working process, the temperature of the panel increases, generally reaching 50°C-55°C or higher, resulting in a decrease in the power generation of the solar panel and a decrease in the service life of the array.

Method used

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  • Porous anodic aluminum oxide cooling material, preparation method and application thereof to solar panel cooling

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Embodiment 1

[0026] A porous anodized aluminum oxide cooling material A, the preparation method of which is: using the principle of electrochemical oxidation to use pure aluminum as an anode, and a graphite carbon rod as a cathode, and place it in a container containing 5 wt% oxalic acid as an electrolyte, and the two electrodes Apply a constant voltage of 30V to the end, and use a magnetic stirrer to continuously stir the electrolyte at a speed of about 1000r / min. The entire device is placed in a low temperature environment of 1°C. After reaction 2, the sample is taken out, and the electrolyte is mixed with 3wt% chromium trioxide and 5vol% phosphoric acid The mixed solution removes the oxide film on the surface of the sample; the sample with the oxide film removed is subjected to the second reaction under the above conditions, and the reaction time is 15h. With the continuous oxidation of pure aluminum in the electrolyte and the continuous dissolution of the oxide film, the pure aluminum M...

Embodiment 2

[0029] A kind of porous anodic aluminum oxide cooling material B, its preparation method is: utilize electrochemical oxidation principle to use pure aluminum as anode, graphite carbon rod as cathode, be placed in the container that fills the phosphoric acid that concentration is 10wt% as electrolyte, electrode Apply a constant voltage of 60V at both ends, and use a magnetic stirrer to continuously stir the electrolyte at a speed of about 1000r / min. The entire device is placed in a low temperature environment of 3°C, and the sample is taken out after 4 hours of reaction. Using 3wt% chromium trioxide and 5vol% The mixed solution of phosphoric acid removes the oxide film on the surface of the sample; the sample with the oxide film removed undergoes a second reaction under the above conditions, and the reaction time is 20h. With the continuous oxidation of pure aluminum in the electrolyte and the continuous dissolution of the oxide film, the Micropores with different pore sizes are...

Embodiment 3

[0032] A kind of porous anodized aluminum oxide cooling material C, its preparation method is: utilize electrochemical oxidation principle to use pure aluminum as anode, graphite carbon rod as cathode, be placed in the container that fills the selenic acid that concentration is 20wt% as electrolyte, Apply a periodic current of 150-200mA to both ends of the electrode, and use a magnetic stirrer to continuously stir the electrolyte at a speed of about 1000r / min. Mixed solution with 5vol% phosphoric acid to remove the oxide film on the surface of the sample; the sample with the oxide film removed is subjected to the second reaction under the above conditions, and the reaction time is 25h. With the continuous oxidation of pure aluminum in the electrolyte and the continuous dissolution of the oxide film , form micropores with different pore sizes on the surface of pure aluminum. After the reaction, use a mixed solution of 5vol% hydrochloric acid and 1M copper chloride to remove unre...

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Abstract

The invention discloses a porous anodic aluminum oxide cooling material, a preparation method and application thereof to solar panel cooling. The porous anodic aluminum oxide cooling material can achieve effects of selective penetration and passive cooling to achieve purposes of improving the power generation efficiency and delaying the array aging speed, and provides a passive cooling method to asolar crystal silicon panel.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a porous anodized aluminum oxide cooling material, a preparation method and an application thereof. Background technique [0002] Photovoltaic technology is one of the most important measures to solve energy and environmental problems at present, but solar power generation has the problems of high cost and low conversion efficiency. For every 1°C increase in the operating temperature of crystalline silicon solar cells, the largest market share, the relative power generation efficiency drops by about 0.45%, and every 10°C increase, the aging rate of the array will double. Due to the change of the external environment temperature and the heat generated by the panel during the working process, the temperature of the panel increases, generally reaching 50°C-55°C or higher, resulting in a decrease in the power generation of the solar panel and a decrease in th...

Claims

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Application Information

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IPC IPC(8): C25D11/08C25D11/10C25D11/12C25D11/24H01L31/048H01L31/052H01L31/054
CPCC25D11/08C25D11/10C25D11/12C25D11/24H01L31/0481H01L31/052H01L31/0547Y02E10/52
Inventor 焦时飞周志华刘俊伟张德宝张卓奋
Owner TIANJIN UNIV
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