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Groove type solar medium-temperature selective absorption coating

A technology of trough solar energy and absorbing coatings, applied in solar thermal power generation, solar thermal devices, layered products, etc., can solve the problems of thermal efficiency decline, collector heat loss increase, infrared emissivity increase, etc., to achieve enhanced absorption Effect, reduction of work cost, effect of high absorption rate

Inactive Publication Date: 2012-10-10
SUZHOU JIAYAN ENERGY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under medium temperature conditions, because the infrared emissivity increases significantly with the increase of temperature, the heat loss of the collector increases significantly, and the thermal efficiency decreases significantly.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] The trough type solar energy medium temperature absorbing coating of the present invention comprises four layers of film, and from substrate to surface is infrared reflection layer, first absorption layer, second absorption layer and antireflection layer successively, and described infrared reflection layer is made up of Ni film, and thickness is 20-120nm; the first absorption layer is a Ni+NiAl film with a thickness of 50-75nm, and the content of NiAl is 25-35wt%; the second absorption layer is a Ni+NiAl film with a thickness of 75-150nm. Wherein the content of NiAl is 35-50wt%; the antireflection layer is a NiO film with a thickness of 25-50nm. The performance of the solar selective absorbing coating prepared by the invention is as follows: after the coating is annealed in vacuum at 400 DEG C for 1 hour, the absorption rate of the coating is 90%-92%.

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Abstract

The invention relates to a groove type solar medium-temperature selective absorption coating, which sequentially comprises an infrared reflecting layer, a first absorption layer, a second absorption layer and an antireflection layer from the base to the surface. The raw materials of the coating are conventional materials, the groove type solar medium-temperature selective absorption coating is wide in application range, high in molding performance and low in price and can be processed into columnar targets, the target utilization rate is obviously improved, and the operating cost can be reduced further; and moreover, the groove type solar high-temperature selective absorption coating is suitable for solar thermal collector tubes with medium operating temperature.

Description

Technical field [0001] The present invention involves the field of warm power generation in grooved solar energy, and specifically involves a selective absorption coating in a medium -temperature collection heat pipe. Background technique [0002] Solar heat power generation is an important technical approach to large -scale development and use of solar energy. At present, there are tower, slot, and discs. Among them, there are many commercial applications in slot and tower systems.So far, the only mature technology in the world after 20 years of commercial operation is far lower than photovoltaic power generation.The energy storage system of the grooved light heat power generation system can achieve 24 hours of operation. As the scale increases, the cost of power generation is also very competitive.At present, the focus of development is the heating pipe with medium temperature set heat and operating temperature exceeding 400 ° C, which can be used for heat generation.In the med...

Claims

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Application Information

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IPC IPC(8): F24J2/50B32B15/01
CPCY02E10/40
Inventor 葛波
Owner SUZHOU JIAYAN ENERGY EQUIP
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