Solar collector and method for producing a light-absorbing surface

Patent metadata

Field	Value
Publication number	US-9599370-B2
Application number	US-201213360865-A
Country	US
Kind code	B2
Filing date	Jan 30, 2012
Priority date	Jul 29, 2009
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A solar collector is provided that has a base material and a nanostructured layer integrated into the base material so as to form a light-absorbing surface. The nanostructured layer has nanoparticles of an inorganic material.

First claim

What is claimed is:

1. A solar collector having a light-absorbing surface comprising:
a base material having a surface; and
a nanostructured layer that is integrated in a total area of the surface of the base material thereby forming the light-absorbing surface,
wherein the nanostructured layer has nanoparticles of an inorganic material, and
wherein the nanostructured layer additionally includes a flux, a binder and a thixotropic agent.

2. The solar collector according to claim 1 , wherein the inorganic material of the nanoparticles has a greater degree of heat absorption than the base material.

3. The solar collector according to claim 1 , wherein inorganic material comprises titanium and/or at least one titanium compound.

4. The solar collector according to claim 1 , wherein the base material comprises aluminum, metal, or glass.

5. A method for producing a light-absorbing surface, the method comprising:
providing a base material having a surface;
coating the surface with a layer of nanoparticles of an inorganic material; and
heating the surface so that the layer of nanoparticles forms a nanostructured layer that is integrated in the surface in order to form the light-absorbing surface,
wherein the layer of nanoparticles additionally includes a flux, a binder, and a thixotropic agent.

6. The method according to claim 5 ; wherein the layer of nanoparticles is sprayed onto the surface.

7. The method according to claim 5 , wherein the heating of the surface is done via a soldering process.

8. The method according to claim 5 , wherein the base material includes aluminum, and the inorganic material comprises titanium and/or at least one titanium compound.

9. The method according to claim 5 , wherein the layer of nanoparticles comprises titanium dioxide nanoparticles.

10. The method according to claim 5 , wherein the layer of nanoparticles comprises a controlled atmosphere brazing flux, a nano titanium dioxide suspension, a polyurethane binder suspension, a polyurethane thickener suspension, and fully deionized water.

11. The method according to claim 10 , wherein the layer of nanoparticles is composed of 25-40% CAB flux, 10-20% nano titanium dioxide suspension, 5-20% polyurethane binder suspension, 1-10% polyurethane thickener suspension, and 30-45% fully deionized water.

12. The solar collector according to claim 1 , wherein the layer of nanoparticles comprises a controlled atmosphere brazing flux, a nano titanium dioxide suspension, a polyurethane binder suspension, a polyurethane thickener suspension, and fully deionized water.

13. The solar collector according to claim 12 , wherein the layer of nanoparticles is composed of 25-40% CAB flux, 10-20% nano titanium dioxide suspension, 5-20% polyurethane binder suspension, 1-10% polyurethane thickener suspension, and 30-45% fully deionized water.

14. The solar collector according to claim 13 , wherein the layer of nanoparticles is composed of 32% CAB flux, 15% nano titanium dioxide suspension, 12% polyurethane binder suspension, 5% polyurethane thickener suspension, and 36% fully deionized water.

15. The method according to claim 11 , wherein the layer of nanoparticles is composed of 32% CAB flux, 15% nano titanium dioxide suspension, 12% polyurethane binder suspension, 5% polyurethane thickener suspension, and 36% fully deionized water.

Assignees

• Englert Peter
• Mahle Int Gmbh

Inventors

• Englert Peter

Classifications

• F24J2/485 Primary

  Mechanical Engineering · mapped topic

• Y02E10/40

  Solar thermal energy, e.g. solar towers · CPC title

• F24S70/225 Primary

  for spectrally selective absorption · CPC title