Abstract:
The invention relates to a glass tube with a glass tube surface. The glass tube surface is at least partly covered by an anti-reflective layer (anti-reflective coating) for reducing a reflectivity for sunlight radiation of the glass tube surface in comparison to an uncovered glass tube surface. The anti-reflective layer comprises at least one nano-pattern with a plurality of regularly arranged nano-sized structure elements. The nano-sized structure elements comprise at least one nano-size which is selected form the range between 50 nm to 500 nm. A distance between two neighboring nano-sized structure elements is selected from the range between 100 nm and 500 nm. The distance refers to the distance between centers of the neighboring nano-sized structure elements. The neighboring nano-sized structure elements are spaced from each other. The method for manufacturing the glass tube with following steps is provided: a) Providing a glass tube with an uncovered glass tube surface; b) Coating the glass tube with an imprintable/embossable composition, c) Imprinting/Embossing the nano-sized structure elements into the imprintable/ embossable composition onto the glass tube surface such that the nano-pattern of the anti-reflective layer is formed. The invention allows the transmission enhancement of glass tubes used in thermo-solar trough applications using an antireflective coating produced by hot embossing/molding and UV nano-imprint.
Abstract:
The solar receiver tube comprises with at least one area which should not be hit by concentrated sunlight. The area is covered by an emissivity inhibiting covering which inhibits an emissivity of infrared light of the tube.
Abstract:
A glass body with a glass body surface is provided, wherein at least one infrared light reflective coating is attached to the glass body surface and the infrared light reflective coating comprises a network of at least one nanomaterial. The method for manufacturing the glass body comprises following steps: a) Providing a glass body and b) Attaching the infrared light reflective coating onto a glass body surface of the glass body. For instance, the glass body is a glass tube with a glass tube wall. A heat receiver tube for absorbing solar energy and for transferring absorbed solar energy to a heat transfer fluid which can be located inside a core tube of the heat receiver tube is provided, too. The core tube comprises a core tube surface with a solar energy absorptive coating for absorbing solar absorption radiation of the sunlight. The core tube is enveloped by an encapsulation with the glass body. A parabolic trough collector is provided with at least one heat receiver tube, which is arranged in a focal line of a parabolic mirror, too. The parabolic trough collector is used in a solar power plant for converting solar energy into electrical energy.
Abstract:
A glass body with a glass body surface is provided, wherein at least one infrared light reflective coating is attached to the glass body surface and the infrared light reflective coating comprises at least one graphene material. The method for manufacturing the glass body comprises following steps: a) Providing a glass body and b) Attaching the infrared light reflective coating onto a glass body surface of the glass body. For instance, the glass body is a glass tube with a glass tube wall. A heat receiver tube for absorbing solar energy and for transferring absorbed solar energy to a heat transfer fluid which can be located inside a core tube of the heat receiver tube is provided. The core tube comprises a core tube surface with a solar energy absorptive coating for absorbing solar absorption radiation of the sunlight. The core tube is enveloped by an encapsulation with the glass body. A parabolic trough collector is provided with at least one heat receiver tube, which is arranged in a focal line of a parabolic mirror, too. The parabolic trough collector is used in a solar power plant for converting solar energy into electrical energy.