High-temperature-resistant high-reflective insulation light shield for solar vacuum heat collecting tube

Abstract

The invention discloses a high-temperature-resistant high-reflective insulation light shield for a solar vacuum heat collecting tube which belongs to the technical field of photo-thermal utilization of solar energy. The high-temperature-resistant high-reflective insulation light shield for the solar vacuum heat collecting tube is fixed to the heat collecting tube through a metal fastener. The high-temperature-resistant high-reflective insulation light shield for the solar vacuum heat collecting tube comprises a ceramic substrate, an insulating inner layer and a high-reflective outer layer, wherein the insulating inner layer is attached to the inner side of the ceramic substrate, and the high-reflective outer layer is attached to the outer side of the ceramic substrate. The light shield canbe oxidized under the circumstance of being radiated by high concentration ratio sunlight and reflects sunlight at the same time, and meanwhile, the light shield can be insulative. As heat accumulated by long-term radiation of the high concentration ratio sunlight reaches the sealing position of protecting the heat collecting tube and a corrugated pipe acts, under a high concentration ratio usingcondition, the reliability of the heat collecting tube u is increased and the service life of the heat collecting tube is prolonged.

Description

technical field [0001] The invention belongs to the technical field of solar light and heat utilization, and in particular relates to a high-temperature-resistant and high-reflection heat-insulation shading cover for a solar vacuum heat collection tube. Background technique [0002] With the rapid development of science and technology, people's demand for energy is increasing day by day. Solar trough thermal power generation has become a focus of attention. High-temperature solar vacuum heat collectors are the core components of trough solar power plants and have been extensively studied. In order to obtain higher system efficiency, the focusing ratio of the concentrating system is constantly increasing, and under the condition of high focusing ratio, the traditional aluminum or stainless steel hood will oxidize during use and lose its light-shielding effect. The generated heat will be conducted to the sealing position of the heat collecting tube and the bellows, thus caus...

AI Technical Summary

Problems solved by technology

In order to obtain higher system efficiency, the focusing ratio of the concentrating system is constantly increasing, and under the condition of high focusing ratio, the traditional aluminum or stainless steel hood will oxidize during use and lose its light-shielding effect. The heat generated will be conducted to the sealing position of the heat collecting tube and the corrugated tube, thus causing damage to the corrugated tube

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