Abstract: A solar thermal absorber element (100) includes a cover glass (110) and a highly selective vacuum coated roll-bond absorber (120) including heat transport tubes (126). The element further including a thermoplastic sealing (130) configured to attach the cover glass and the roll-bond absorber to each other so that there is a distance (h) between the cover glass and the roll-bond absorber, and a sealed space (134), which is formed by the cover glass, the roll-bond absorber, and the thermoplastic sealing and which is filled up with a low thermal conductive gas (136).

Abstract: A method (100) for manufacturing a thermal absorber for a solar thermal collector includes arranging (120) a substrate of the thermal absorber on a vacuum coating line and depositing (160) by way of a physical vapour deposition on the substrate that is arranged on the vacuum coating line layers configured to absorb light.

Abstract: A method for providing a thermal absorber, which can be used in solar thermal collectors. The method includes a step of depositing on a substrate a first layer having a composition that comprises titanium, aluminium, nitrogen, and one of following elements: silicon, yttrium, cerium, and chromium. The method further optionally includes a step of depositing a second layer deposited on the first layer, the second layer having a composition including titanium, aluminium, nitrogen, oxygen and one of the elements of silicon, yttrium, cerium, and chromium, and a step of depositing a third layer having a composition including titanium, aluminium, silicon, nitrogen, and oxygen, the third layer being a top layer of the thermal absorber.

Abstract: A solar thermal collector includes a solar thermal absorber element which includes a cover glass, a direct-flow absorber, a fore thermoplastic sealing for attaching the cover glass and absorber to each other leaving a distance (h1) therebetween, and a fore sealed space, formed by the cover glass, absorber, and fore sealing. The fore space is filled up with a first low thermal conductive gas. The element further includes a back insulation part, a back thermoplastic sealing for attaching the insulation part and the absorber to each other leaving a distance (h2) therebetween, and a back sealed space, formed by the insulation part, absorber, and back sealing. The back space is filled up with a second low thermal conductive gas. The element may include a TPS-direct-flow absorber-glass element, wherein the back glass insulation part is hermetically sealed with the TPS sealing and the back space is filled with the second gas.

Abstract: The application relates to a method (100) for producing a direct flow aluminium absorber of a solar thermal collector, the absorber including an absorber plate having at least one tube for a heat transport fluid, and at least one end tube for a heat transport fluid, the at least one end tube being connected to the absorber plate. The method comprises laser welding (130) the at least one end tube to the absorber plate for producing the complete absorber to be coated by at least one layer configured to absorb light.

Abstract: A solar thermal absorber element (100) includes a cover glass (110) and a highly selective vacuum coated roll-bond absorber (120) including heat transport tubes (126). The element further including a thermoplastic sealing (130) configured to attach the cover glass and the roll-bond absorber to each other so that there is a distance (h) between the cover glass and the roll-bond absorber, and a sealed space (134), which is formed by the cover glass, the roll-bond absorber, and the thermoplastic sealing and which is filled up with a low thermal conductive gas (136).

Abstract: The application relates to a method (100) for producing a direct flow aluminium absorber of a solar thermal collector, the absorber including an absorber plate having at least one tube for a heat transport fluid, and at least one end tube for a heat transport fluid, the at least one end tube being connected to the absorber plate. The method comprises laser welding (130) the at least one end tube to the absorber plate for producing the complete absorber to be coated by at least one layer configured to absorb light.

Abstract: A method (100) for manufacturing a thermal absorber for a solar thermal collector includes arranging (120) a substrate of the thermal absorber on a vacuum coating line and depositing (160) by way of a physical vapour deposition on the substrate that is arranged on the vacuum coating line layers configured to absorb light.

Abstract: A method for providing a thermal absorber, which can be used in solar thermal collectors. The method includes a step of depositing on a substrate a first layer having a composition that comprises titanium, aluminium, nitrogen, and one of following elements: silicon, yttrium, cerium, and chromium. The method further optionally includes a step of depositing a second layer deposited on the first layer, the second layer having a composition including titanium, aluminium, nitrogen, oxygen and one of the elements of silicon, yttrium, cerium, and chromium, and a step of depositing a third layer having a composition including titanium, aluminium, silicon, nitrogen, and oxygen, the third layer being a top layer of the thermal absorber.

Abstract: What is described here is a method of producing a patterned coating by PECVD without additional production steps. The proposed method produces a moth-eye like macrostructure on a surface by direct deposition. Additionally, the macrostructure may be modulated by a microstructure with a surface texture in the subwavelength range. As a result, protective, antireflective coating comprising a carrier layer consisting of an optically transparent material, which, at least on one surface side, presents antireflective properties with respect the optical wavelengths of the radiation incident on the surface can be produced, as well as surface structures which are the basis for superhydrophobic surface properties.