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Target-Aligned Heliostat Field Layout for Non-Flat Terrain

Buck, Reiner and Pfahl, Andreas and Roos, Thomas H. (2012) Target-Aligned Heliostat Field Layout for Non-Flat Terrain. 1st Southern African Solar nergy Conference, 21.-23. May 2012, Stellenbosch, Südafrika.

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Abstract

The layout for a solar tower test facility for CSIR, Pretoria, is described. The solar tower system is designed for 400kWth receiver outlet power. The heliostat field layout takes into account both the real (non-flat) topography of the terrain as well as the typical weather conditions at the site, with usually better solar conditions in morning times. As first step, an initial field layout was done assuming standard heliostats. Then, the performance improvement due to the use of target-aligned heliostats was evaluated, showing nearly 12% gain in annual energy when optimized canting angles are applied to each heliostat. In a second step the positions of the heliostats were adjusted to further improve the annual energy yield. This was done by slightly shifting the position of a heliostat and evaluating the impact on annual energy yield. No restrictions were made on the heliostat positions, except for a minimum distance between neighbouring heliostats. The heliostats were repositioned one after the other for the whole field. This procedure was repeated many times. At the end of this optimization, the annual intercepted energy was about 5.1% higher than the initial configuration with target-aligned heliostats.

Item URL in elib:https://elib.dlr.de/79005/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Target-Aligned Heliostat Field Layout for Non-Flat Terrain
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Buck, Reinerreiner.buck (at) dlr.deUNSPECIFIED
Pfahl, Andreasandreas.pfahl (at) dlr.deUNSPECIFIED
Roos, Thomas H.throos (at) csir.co.zaUNSPECIFIED
Date:2012
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:solar tower, heliostat field layout, ray tracing, target aligned heliostat, canting angle
Event Title:1st Southern African Solar nergy Conference
Event Location:Stellenbosch, Südafrika
Event Type:international Conference
Event Dates:21.-23. May 2012
Organizer:Stellenbosch, University
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Punktfokussierende Systeme (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Punktfokussierende Systeme
Deposited By: Uhlig, Tamara
Deposited On:06 Dec 2012 16:46
Last Modified:06 Dec 2012 16:46

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