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Multi-layer anodic aluminum oxide selective reflection material, preparation method and application of multi-layer anodic aluminum oxide selective reflection material in cooling of disc type solar cell

An anodized aluminum, solar panel technology, applied in photovoltaic power generation, electrical components, photovoltaic modules, etc., can solve the problems of reduced service life, low conversion efficiency, decline, etc., to achieve the effect of improving efficiency and reducing temperature

Active Publication Date: 2020-04-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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
For poly-photovoltaic cells, the temperature can exceed 100°C under high light intensity conditions for a long time, and the service life will be reduced or even invalidated due to the aging of the system due to the operation at high temperature
In addition, the performance of poly-photovoltaic cells will decrease with the increase of battery temperature. Studies have shown that for every 1°C decrease in battery temperature, the output power can increase by 0.2%-0.5%, and the current poly-photovoltaic cooling system is complex, so there is an urgent need Research on cost-effective cooling methods for poly-photovoltaic panels to improve their power generation efficiency and delay aging

Method used

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  • Multi-layer anodic aluminum oxide selective reflection material, preparation method and application of multi-layer anodic aluminum oxide selective reflection material in cooling of disc type solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A multi-layer anodic aluminum oxide selective reflection material. The selective reflection light-gathering layer reflects the sunlight of 0.3-1.1 microns and transmits the sunlight of 1.1-2.5 microns. The manufacturing method of the selective reflection light-concentrating layer:

[0037] Using the principle of electrochemical oxidation, pure aluminum is used as anode, graphite carbon rod is used as cathode, placed in a container containing oxalic acid (or phosphoric acid, selenic acid, sulfuric acid) as electrolyte, and 30-50V constant voltage or current density is applied to both ends of the electrode. 0-10mA / cm 2 Constant current, and use a magnetic stirrer to continuously stir the electrolyte. The entire device is placed in a low temperature environment of 0-5°C. After reacting for 1-3 hours, pure aluminum is taken out as a sample. A mixture of chromium trioxide and phosphoric acid is used to remove the surface of the sample. Oxide film; samples with oxide film remove...

Embodiment 2

[0039] Such as figure 1 As shown, the dish-type solar panel includes a supporting tower 5-1, a reflecting frame 5-2, a battery support 6, a solar cell 2, a radiation cooling layer 1, and a combined material layer;

[0040] The reflection frame is arranged on the support tower, and the solar cell is installed on the reflection frame through a battery bracket, so that the solar cell is located at the reflection focus of the reflection frame;

[0041] The radiation cooling layer is placed on the back plate of the solar cell, the combined material layer is placed on the reflection frame 5-2 of the dish-type solar cell panel, and the combined material layer includes a selective reflection light-concentrating layer 4 and a protective layer 3 The selective reflective light-concentrating layer 4 is arranged between the two protective layers 3, and the protective layer 3 is made of PMMA plate to prevent the selective reflective light-concentrating layer 4 from being exposed to the environme...

Embodiment 3

[0045] The passive cooling method of the dish-type solar cell based on selective reflection of the present invention includes the following steps:

[0046] The first step: using electrochemical principles to use pure aluminum as the anode, graphite carbon rod as the cathode, placed in a container containing oxalic acid (or phosphoric acid, selenic acid, sulfuric acid) as the electrolyte, and apply constant voltage or constant current to both ends of the electrode , And use a magnetic stirrer to continuously stir the electrolyte, place the whole device in a low temperature environment, take out the sample after a period of reaction, and use a mixture of chromium trioxide and phosphoric acid to remove the oxide film on the sample surface;

[0047] Step 2: The sample with the oxide film removed undergoes a second reaction under periodic voltage or periodic current. As the pure aluminum is continuously oxidized in the electrolyte and the oxide film is continuously dissolved, a multilaye...

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Abstract

The invention discloses a multi-layer anodic aluminum oxide selective reflection material, a preparation method and application of the multi-layer anodic aluminum oxide selective reflection material in cooling of a disc type solar cell. The multi-layer anodic aluminum oxide selective reflection material can play a role in selectively reflecting sunlight so as to achieve the purpose of reducing useless heat absorbed by the solar cell, so that the power generation efficiency is improved, the aging speed of the cell is reduced, and a passive cooling method is provided for the disc type solar cell.

Description

Technical field [0001] The invention belongs to the technical field of new energy materials, and specifically relates to a multilayer anodic aluminum oxide selective reflective material, a preparation method and an application thereof. Background technique [0002] Photovoltaic technology is currently one of the most important measures to solve energy and environmental problems, but solar power generation has the problems of high cost and low conversion efficiency. For poly-photovoltaic cells, the temperature can exceed 100°C under conditions of high light intensity for a long time, and operation at high temperatures will cause the system to age and reduce its service life or even fail. In addition, the performance of PV cells will decrease with the increase of battery temperature. Studies have shown that for every 1°C decrease in battery temperature, the output power can increase by 0.2% -0.5%, and the current PV cooling system is complicated, so there is an urgent need Researc...

Claims

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Application Information

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IPC IPC(8): H02S40/22H02S40/42G02B1/00G02B5/08
CPCH02S40/22H02S40/42G02B5/0808G02B1/00Y02E10/52
Inventor 焦时飞周志华刘俊伟张德宝张卓奋
Owner TIANJIN UNIV
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