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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5944

Title: Target aligned heliostat field layout for non-flat terrrain
Authors: Buck, R
Pfahl, A
Roos, TH
Keywords: Solar tower
Heliostat field layout
Ray tracing
Target aligned heliostat
Canting angle
Issue Date: May-2012
Citation: Buck, R, Pfahl, A and Roos, TH. Target aligned heliostat field layout for non-flat terrrain. Proceedings 1st Southern African Solar Energy Conference, Stellenbosch, 21-23 May 2012
Series/Report no.: Workflow;9140
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.
Description: Proceedings 1st Southern African Solar Energy Conference, Stellenbosch, 21-23 May 2012
URI: http://hdl.handle.net/10204/5944
Appears in Collections:Resource-based sustainable development
Sustainability science
Sustainable energy futures
Infrastructure engineering
Environmental and resource economics
General science, engineering & technology
General research interest

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