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Automatic determination of heliostat orientation using an auxiliary mirror

Flesch, Robert and Ahlbrink, Nils and Pitz-Paal, Robert and Belhomme, Boris (2012) Automatic determination of heliostat orientation using an auxiliary mirror. Solarpaces 2012, 11.-14. September 2012, Marrakesch, Marokko.

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Abstract

In this paper a new method is presented which can be used to determine the heliostat orientation and improve the tracking accuracy in solar thermal power towers during operation. A small mirror attached to every heliostat, the auxiliary mirror, reflects the sunlight onto the target. The resulting spot is used to determine the orientation of the heliostat, which can be used to adjust the heliostat orientation with respect to the assigned aim point. Tracking accuracy of the heliostats can be improved by applying a correction based on the determined orientation. In the study presented the applied method is described and analyzed in detail. Furthermore, restrictions of the method are discussed. Simulations and a short test performed to evaluate the accuracy are presented.

Document Type:Conference or Workshop Item (Paper, Poster)
Title:Automatic determination of heliostat orientation using an auxiliary mirror
Authors:
AuthorsInstitution or Email of Authors
Flesch, Robertrobert.flesch@dlr.de
Ahlbrink, NilsUNSPECIFIED
Pitz-Paal, RobertUNSPECIFIED
Belhomme, BorisUNSPECIFIED
Date:September 2012
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:solar thermal power tower, heliostat tracking accuracy, heliostat control
Event Title:Solarpaces 2012
Event Location:Marrakesch, Marokko
Event Type:international Conference
Event Dates:11.-14. September 2012
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Hochtemperatursysteme (old)
Location: other
Institutes and Institutions:Institute of Solar Research > Punktfokussierende Systeme
Deposited By: Robert Flesch
Deposited On:20 Nov 2012 17:07
Last Modified:20 Nov 2012 17:07

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