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Evaluation and Optimization of Heliostat Calibration Methods

Zimmermann, Felix (2021) Evaluation and Optimization of Heliostat Calibration Methods. Bachelor's, RWTH Aachen University.

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In solar tower power plants, the sun's energy is focused onto a receiver at the top of a solar tower by means of many biaxially movable mirrors (heliostats) and the high energy density generated is used, for example, to generate electricity via a steam power process or to trigger chemical processes for the production of new types of fuels. It is very important that the heliostats track the movement of the sun correctly throughout the day, so that the incoming solar rays are reflected as accurately as possible onto a defined point on the tower. To achieve this, motor positions of the two linear actuators, which change the orientation of the heliostats, are calculated from an error-prone kinematic geometry model of the individual heliostats. To minimize alignment errors, selected parameters of the geometry model are adjusted by means of a regression to calibration data recorded by the camera-target method. Within the scope of this work, on the one hand, the regression method used is investigated and improvements and further algorithms are tested and developed. On the other hand, the selection of optimization parameters from the geometry model is analyzed. It was found that changing the regression methodology does not improve the alignment accuracy. However, a selection of optimization parameters and their optimization order could be found that indicate a significant reduction of the alignment error.

Item URL in elib:https://elib.dlr.de/143506/
Document Type:Thesis (Bachelor's)
Title:Evaluation and Optimization of Heliostat Calibration Methods
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:26 May 2021
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:90
Keywords:Solar tower power plant Heliostat Error-prone kinematic
Institution:RWTH Aachen University
Department:Lehrstuhl für Solartechnik
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Smart Operation
Location: Jülich
Institutes and Institutions:Institute of Solar Research > Solar Power Plant Technology
Deposited By: Maldonado Quinto, Daniel
Deposited On:06 Oct 2021 18:11
Last Modified:06 Oct 2021 18:11

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