Solar thermal collector with variable communicating hole area

Abstract

The invention provides a solar thermal collector which 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 arranged opposite to the bending direction of an arch line structure of a reflector; the focus of the reflector is arranged in the included angle formed between the two tube plate structures; inner fins are arranged in each collector tube, are connected with corresponding diagonals of a rectangle and divide the interior of the corresponding collector tube into multiple small channels; communicating holes are formed in each inner fin; and the areas of the communicating holes of different collector tubes become larger and larger in the direction that a connecting point of the two tube plate structures extends towards the lowest positions on the two sides. The solar thermal collector can ensure the interiors of different collector tubes to keep basically same pressure so as to prolong the overall service life of the collector tubes, can also ensure the heat exchange areas of the inner fins of the collector tubes and strengthens heat transfer.

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] In the prior art, a solar heat collector with a tube-sheet structure is given, and because the fins are arranged inside, the pressure increases. In order to reduce the pressure, communication holes are provided on the fins, but the fins and spacing of the communication holes are generally They are all the same, which leads to excessive pressure at the position where the heating is strong, and the communication holes are not enough to relieve the pressure, which leads to the short service life of the collector part due to too much pressure, so it is necessary to overcome this Happening

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