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  4. Terrestrial Laser Scanning for Fast Spatially Resolved Cleanliness Assessment of Heliostat Fields
 
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2022
Conference Paper
Title

Terrestrial Laser Scanning for Fast Spatially Resolved Cleanliness Assessment of Heliostat Fields

Abstract
This paper presents a novel method for the assessment of cleanliness levels (i.e. specular relative reflectance) in the solar field by use of laser scanning. The detected backscattered laser intensity caused by soil and dust, on the otherwise specular mirror surfaces, can be used for determining the cleanliness of mirrors in the solar field with an excellent spatial resolution and acquisition speed. The backscatter behavior of soiled mirrors with distance and incident angle is analyzed and used for transferring the raw measurements values to a reference distance and incident angle. The experimental results of the novel laser scanning measurement technique as well as new insights on soiling behavior are presented. First, the calibration measurements with artificially soiled mirror samples are analyzed, followed by an extensive measurement campaign in a heliostat field. A correlation for the backscatter power and the cleanliness is found, and the first spatially resolved cleanliness measurement for a heliostat field is shown, successfully validating the measurement principle.
Author(s)
Ferreres Eceiza, Maitane
Fraunhofer-Institut für Solare Energiesysteme ISE  
Bitterling, Moritz  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Schmidt, Thomas  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Boehret, Tobias
FARO Technologies Inc. 250 Technology Park
Wohlfeld, Denis
FARO Technologies Inc. 250 Technology Park
Bern, Gregor  
Fraunhofer-Institut für Solare Energiesysteme ISE  
Mainwork
SolarPACES 2022, 28th International Conference on Concentrating Solar Power and Chemical Energy Systems  
Conference
International Conference on Concentrating Solar Power and Chemical Energy Systems 2022  
Open Access
File(s)
Download (1.49 MB)
Rights
CC BY 4.0: Creative Commons Attribution
DOI
10.52825/solarpaces.v1i.705
10.24406/publica-3538
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Laser Scanning

  • LIDAR

  • Concentrated Solar Power

  • Heliostat Field

  • Soiling

  • Cleanliness

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