Ddeformation detection method and device for groove type solar heat collecting tube

Abstract

The invention discloses a deformation detection method and device for a groove type solar heat collecting tube, and mainly relates to the technical field of heat collecting tube performance detection. The method comprises the following steps: S1, a real-time solar elevation angle at a groove type condenser lens is measured by adopting a solar angle detector, and a shooting angle of an infrared thermal imager is adjusted to a corresponding angle; S2, the infrared thermal imager is moved to the center of the groove type condenser lens, and the heat collecting pipe is shot in the forward direction; S3, the infrared thermal imager is moved in the length direction of the heat collecting pipe, shooting detection is conducted on a plurality of points on one heat collecting pipe while the infrared thermal imager is moved, and the temperature distribution conditions of different points on the surface of the heat collecting pipe are expressed as N1-Nn; and S4, values from N1 to Nn are compared, and when the values from N1 to Nn are the same, it is indicated that the heat collecting pipe does not deform. Detection is carried out based on sunlight and the infrared thermal imager, the precision is high, the investment is small, the detection process is convenient and rapid, and the reference performance is high.

Description

technical field [0001] The invention relates to the technical field of heat collection tube performance detection, in particular to a deformation detection method and device for a trough-type solar heat collection tube. Background technique [0002] As the problem of global warming has been paid more and more attention, the reserves of non-renewable resources such as oil, natural gas, and coal have become less and less, and people have gradually paid attention to renewable energy. research and develop. In the study of solar photothermal conversion, the trough solar concentrator technology has been used in industry since the 1980s, and is currently the most mature commercial photothermal conversion technology. [0003] In trough solar thermal utilization, the heat collector tube is the carrier for light-to-heat conversion. The heat collector tubes used in large-scale trough solar thermal power plants are relatively long, affected by gravity, thermal stress, external wind loa...

AI Technical Summary

Problems solved by technology

However, the fixed trough-type solar collector tube detection device needs to be installed on the trough-type solar system support, which is troublesome to install, and the cost of materials and labor is high, and the detection by laser emission method has higher requirements on the accuracy of the detection device and the test environment , the stability of the laser will directly affect the accuracy of the results

Moreover, the current detection methods mostly convert optical signals into electrical signals for processing and analysis. This method requires more conversion processes and is prone to produce more errors. It requires greater accuracy of the detection device and is greatly affected by the external environment.

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