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Solar Selective Absorption Coatings

Sandia National Laboratories

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Publications:

PDF Document PublicationMarket Sheet (982 KB)


Technology Marketing SummarySandia has developed a new class of solar selective absorber coatings that significantly improve the thermal conversion efficiency of solar units by reducing radiative energy losses from the absorbing elements.  Solar absorption coatings applied to components haave considerable utility in the design of solar thermal flatplan collectors and of solar concentrators.DescriptionUnlike other coatings that tend to be mechanically fragile which leads to degradation, the coating developed by Sandia is economical, energy efficient, and has limited environmental impact compared to competing processes.  These coatings comprise a structured metallic overlayer that has a sub-micron structured designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. Benefits
  • Process is more economical than existing methods
  • Has limited environmental impact compared to current processes
  • More energy efficient
  • Protected from mechanical, thermal, and environmental degradation
  • Coatings are designed to efficiently absorb solar radiation while retaining low thermal emissivity
Applications and Industries
  • Solar Thermal Power Plant
  • Energy Storage
  • Photovoltaics
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 6,783,653
Patent
6,783,653
Solar selective absorption coatings
A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.
Sandia National Laboratories 08/31/2004
Issued
Patent 6,632,542
Patent
6,632,542
Solar selective absorption coatings
A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.
Sandia National Laboratories 10/14/2003
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
US Patent # 6,632,542/ SD# 5828 and US Patent # 6,783,653/ SD# 5828.1Prototype - Sandia estimates this technology's TRL at level 4. Key elements of the technology have been demonstrated in a laboratory environment. Available - Various license and partnering options are available. Please contact the Intellectual Property department to discuss. 08/08/201103/12/2013

Contact SNL About This Technology

To: Technology Inquiries<ip@sandia.gov>