A collector tube solar water heater with competing changes in the height of the inner fins

Abstract

The invention provides a solar water heater. The solar water heater comprises a heat collector, and the heat collector comprises a collector pipe, and the collector pipe comprises a flat pipe and ribs; the flat pipe comprises parallel pipe walls and side walls, and the side walls are connected with the ends of the parallel pipe walls; a fluid channel is formed between the side walls and the parallel pipe walls, and the inner fins are arranged on the inner wall of a heat absorption end of the collector pipe; and the heights of the inner fins are continuously decreased at the heat absorption end in the direction from the middle portion of the cross section of the collector pipe to the two sides. According to the solar water heater, the inner fins are changed in the direction from the middle portion of the cross section of the heat absorption end to the two sides, heat absorption can be further strengthened and can be even, and the service life of the collector pipe is prolonged.

Description

technical field [0001] The invention belongs to the field of solar energy, in particular to a solar water heater. 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. . Energy issues have become one of the most prominent issues in the contemporary world. Therefore, seeking new energy sources, especially non-polluting clean energy sources has become a research hotspot. [0003] Solar energy is an inexhaustible clean energy with a huge amount of resources. The total amount of solar radiation energy received by the earth's surface ev...

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Problems solved by technology

[0004] In general, solar water heaters use heat collecting tubes to absorb heat, but the heat collecting tubes may lose heat due to heat transfer problems, and because the fins are installed inside the heat collecting tubes, the fluid resistance increases, resulting in low heat transfer coefficients.

[0005] In addition, during the heat-absorbing process at the heat-absorbing end of the heat-collecting tube, the heat transfer at each position of the heat-absorbing end is different, resulting in uneven local heat transfer

[0006] In view of the above problems, the present invention provides a new solar water heater, thereby solving the problems of low heat transfer coefficient and uneven heat transfer when the heat collecting tube absorbs heat

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