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Comparison and Optimization of Heliostat Canting Methods

Buck, Reiner and Teufel, Edgar (2007) Comparison and Optimization of Heliostat Canting Methods. In: Conference proceedings (ES2007-36168). ASME digital store. Energy Sustainability 2007, 2007-06-27 - 2007-06-30, Long Beach, CA (USA).

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Abstract

Heliostat canting (alignment of mirror facets) is known to have a major influence on the optical efficiency of heliostat fields and therefore on the power output of solar tower plants. In recent years several canting concepts were used, mainly on- and off-axis canting. Several new canting concepts, like stretched-parabolic or target aligned canting, were proposed in order to improve the performance of heliostats. As solar power plants become economically more attractive, knowledge about the influence of canting becomes more important. In this contribution, the influence of several factors on the canting method is discussed and optimal canting strategies are described. The considered factors comprise plant power level, heliostat position in the field, heliostat area, receiver dimension and site latitude. It is concluded that the target aligned tracking method is superior to all other variants in the majority of cases. As for the standard azimuth-elevation tracking methods, no one of these exhibits a clear advantage. It is only the on-axis method that performs worst in all cases.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Comparison and Optimization of Heliostat Canting Methods
Authors:
AuthorsInstitution or Email of Authors
Buck, ReinerUNSPECIFIED
Teufel, EdgarUNSPECIFIED
Date:July 2007
Journal or Publication Title:Conference proceedings
Refereed publication:Yes
In ISI Web of Science:No
Publisher:ASME digital store
Status:Published
Keywords:solar power, solar tower, heliostat, canting
Event Title:Energy Sustainability 2007
Event Location:Long Beach, CA (USA)
Event Type:international Conference
Event Dates:2007-06-27 - 2007-06-30
Organizer:ASME
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: Stuttgart
Institutes and Institutions:Institute of Technical Thermodynamics > Solar Research
Deposited By: Dr.-Ing. Reiner Buck
Deposited On:23 Oct 2007
Last Modified:27 Apr 2009 13:30

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