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Calibration method and calibration device for a set of reflectors for concentrating solar radiation onto a radiation receiver

A technology of solar radiation and reflectors, applied in solar collector controllers, solar collectors, solar thermal energy, etc., to achieve fast calibration, minimize radiation loss, and improve efficiency

Active Publication Date: 2020-08-21
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Thus, the present invention solves the problem of improving the efficiency of existing known calibration methods

Method used

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  • Calibration method and calibration device for a set of reflectors for concentrating solar radiation onto a radiation receiver
  • Calibration method and calibration device for a set of reflectors for concentrating solar radiation onto a radiation receiver
  • Calibration method and calibration device for a set of reflectors for concentrating solar radiation onto a radiation receiver

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Embodiment Construction

[0072] figure 1 A first embodiment of the calibration device according to the invention is shown. The calibration device consists of a set of reflectors 1 mounted biaxially pivotably on the tower by means of motor means. The reflector 1 is formed as a heliostat. The device also includes a radiation receiver 2 arranged on the tower and having a rectangular radiation aperture. Within the rectangular radiating aperture, the radiation receiver has an absorber which completely fills the radiating aperture and whose absorber region is thermally connected to the line for the heat transfer fluid.

[0073] By means of the heat transfer fluid, the heat obtained by concentrating the sunlight onto the radiation receiver 2 by means of the reflector 1 is conducted away for further utilization, in this case in the energy cycle for power generation. The calibration device also has a camera 3 , here as a digital camera, for recording spatially resolved measurement images of the calibration ...

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Abstract

The present invention relates to a calibration method for a set of reflectors, comprising: A) aligning the reflectors so that solar radiation reflected by the reflectors impinges on the calibration area; B) causing the The intensity distribution of the radiation incident on the calibration area varies, wherein at least one predetermined motion pattern parameter of each reflector differs from the parameters of the other reflectors; C) by means of at least one camera recording a plurality of different localized locations of the calibration area pixel rows of dots, where each pixel row has at least five time-shifted pixel records; D) transform the pixel row to the frequency domain to determine the spectrum of each pixel row; E) convert the spectrum according to the motion pattern parameters of the reflector The subsets are assigned to the reflectors; F) determining at least one reflective target location for each reflector based on at least the spectral subset assigned to the reflectors. The invention also relates to a calibration device for a set of reflectors for concentrating solar radiation onto a radiation receiver.

Description

technical field [0001] The invention relates to a calibration method and a calibration device for a set of reflectors for concentrating solar radiation onto a radiation receiver. Background technique [0002] For solar energy utilization, it is known to concentrate solar radiation onto a radiation receiver by means of a plurality of reflectors. Here, solar towers and systems are known, in which incident solar radiation is concentrated on radiation receivers by means of reflectors arranged as heliostats. Linear receivers are also known, such as linear Fresnel receivers, where a system of single-axis tracking mirrors arranged in an array concentrates the incident solar radiation onto the linear receiver, usually via an additional secondary concentrator. [0003] The radiation concentrated on the radiation receiver leads to heat generation, whereby thermal energy can be converted into electrical or mechanical energy for further utilization. Likewise, thermal energy can be use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24S50/20
CPCY02E10/47F24S50/20F24S50/80F24S2050/25
Inventor G·伯尔尼P·施欧特D·W·范罗延P·尼茨A·海姆斯特
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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