A kind of solar heat collector with regularly changing size of heat collecting tube

Abstract

The invention provides a solar thermal collector. The solar thermal collector comprises two tube plate structures, wherein a certain included angle is formed between the two tube plate structures; the direction of the included angle is opposite to the bending direction of an arc structure of a reflecting mirror; the focus of the reflecting mirror is in the included angle formed by the tube plate structures; inner fins are arranged inside collector tubes, are connected with opposite angles of rectangles and divide the interiors of the collector tubes into a plurality of small channels; communication pores are formed in the inner fins; the inner cross section areas of the collector tubes are larger and larger in the extension directions from the collection point of the two tube plate structures to the lowest positions at the two sides. The solar thermal collector has the advantages that the uniform mixedness of fluids is maintained, thus avoiding loss of heat during fluid mixing; the temperatures of the collector tubes are ensured to basically keep the same, thus prolonging the overall service lives of the collector tubes.

Description

technical field [0001] The invention belongs to the field of solar energy, in particular to a solar heat collector. Background technique [0002] With the rapid development of modern society and economy, the human demand for energy is increasing. However, the reserves of traditional energy such as coal, oil, and natural gas continue to decrease and become increasingly scarce, resulting in rising prices. At the same time, the environmental pollution caused by conventional fossil fuels is also becoming more and more serious. These greatly limit the development of society and the improvement of human life quality. . Solar thermal conversion is a solar energy utilization method with high energy conversion efficiency and utilization rate and low cost, which can be widely promoted in the whole society. In solar heat utilization devices, the key is to convert solar radiation energy into heat energy, and the device that realizes this conversion is called a solar collector. Howeve...

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Problems solved by technology

[0003] A solar heat collector with a tube-sheet structure is given in the prior art, and the flow rate in all the heat-collecting tubes is the same, which causes the temperature of the heat-absorbing tube to be too high, thereby reducing the service life

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