Vacuum heat-preservation calandria two-dimensional tracking focusing solar heat collector

Abstract

The invention relates to the technical field of solar photo-thermal power generation, and discloses a vacuum heat-preservation calandria two-dimensional tracking focusing solar heat collector. The vacuum heat-preservation calandria two-dimensional tracking focusing solar heat collector comprises a plurality of shells connected in series, heat collecting pipelines arranged connected in parallel and heat absorbing fins, wherein the heat collecting pipelines are arranged inside the shells in parallel, the space between the shells and the heat collecting pipelines is vacuum, the heat absorbing fins are closely attached to the surfaces of the heat collecting pipelines and serve as a heat collector heat absorbing cavity, the heat absorbing fins are of a wave shape matched with the heat collecting pipelines, and selective absorbing coatings are laid on the surfaces of the heat absorbing fins. The vacuum heat-preservation calandria two-dimensional tracking focusing solar heat collector has good anti-freezing capacity, a higher heat collecting and exchanging effect, higher photo-thermal efficiency, longer service life and lower manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of solar photothermal power generation systems, in particular to a vacuum heat preservation and tube-type two-dimensional tracking and focusing solar heat collector. Background technique [0002] Energy is the foundation of social development and human progress. With the continuous development of industry and the expansion of human needs, the energy situation is becoming increasingly tense, and green energy is considered to be a way to fundamentally solve human energy needs. [0003] Among them, solar energy is considered to be one of the most potential new energy sources because of its unlimited "reserves", universal distribution, cleanliness and economy. The characteristics of solar thermal power generation are good adaptability to the grid, high photoelectric conversion rate, environmental protection and adjustable, etc., so it has become an important development direction of solar energy utilization. ...

AI Technical Summary

Problems solved by technology

The plate collector is cost-effective, the heat absorption and heat transfer interface is relatively flat, the energy distribution is relatively uniform, there are no hot spots in the entire interface, the overall heat transfer is relatively uniform, and the service life is long. Therefore, the plate collector occupies an important position in the solar thermal field. important position, but the plate collector has poor frost resistance and is not suitable for use in northern regions

The vacuum heat collecting tube can withstand low temperature -30℃, but the damage rate of the glass pipe fittings is high, and the low temperature performance is poor. The vacuum heat collecting tube of the direct current method has the danger of bursting in summer

The efficiency of the heat pipe vacuum collector is better, but there is also the danger of the glass tube being easily broken. Therefore, there is no universal and cost-effective solar collector.

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