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AUTOMATED HIGH RESOLUTION MEASUREMENT OF HELIOSTAT SLOPE ERRORS

Ulmer, Steffen and März, Tobias and Prahl, Christoph and Reinalter, Wolfgang and Belhomme, Boris (2009) AUTOMATED HIGH RESOLUTION MEASUREMENT OF HELIOSTAT SLOPE ERRORS. SolarPACES conference, Berlin.

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Abstract

A new optical measurement method that simplifies and optimizes the mounting and canting of heliostats and helps to assure their optical quality before commissioning of the solar field was developed. This method is based on the reflection of regular patterns in the mirror surface and their distortions due to mirror surface errors. The measurement has a resolution of about one million points per heliostat with a measurement uncertainty of less than 0.2 mrad and a measurement time of about one minute per heliostat. The system is completely automated and allows the automatic measurement of an entire heliostat field during one night. It was extensively tested at the CESA-1 heliostat field at the Plataforma Solar de Almería. Comparisons of flux simulations based on the measurement results with real flux density measurements were performed. They showed an excellent agreement and demonstrated in a striking manner the high measurement accuracy and high grade of detail in the simulation achieved by this technique.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:AUTOMATED HIGH RESOLUTION MEASUREMENT OF HELIOSTAT SLOPE ERRORS
Authors:
AuthorsInstitution or Email of Authors
Ulmer, SteffenUNSPECIFIED
März, TobiasUNSPECIFIED
Prahl, ChristophUNSPECIFIED
Reinalter, WolfgangUNSPECIFIED
Belhomme, BorisUNSPECIFIED
Date:September 2009
Status:Published
Keywords:heliostat, optical quality, optical measurement, deflectometry, ray tracing, flux measurement
Event Title:SolarPACES conference
Event Location:Berlin
Event Type:international Conference
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 - Qualifizierung (old)
Location: other
Institutes and Institutions:Institute of Technical Thermodynamics > Solar Research
Deposited By: Dr.-Ing. Steffen Ulmer
Deposited On:19 Feb 2010 18:08
Last Modified:12 Dec 2013 20:53

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