Buck, RPfahl, ARoos, TH2012-06-262012-06-262012-05Buck, 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 2012http://hdl.handle.net/10204/5944Proceedings 1st Southern African Solar Energy Conference, Stellenbosch, 21-23 May 2012The 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.enSolar towerHeliostat field layoutRay tracingTarget aligned heliostatCanting angleConference PresentationBuck, R., Pfahl, A., & Roos, T. (2012). Target aligned heliostat field layout for non-flat terrrain. http://hdl.handle.net/10204/5944Buck, R, A Pfahl, and TH Roos. "Target aligned heliostat field layout for non-flat terrrain." (2012): http://hdl.handle.net/10204/5944Buck R, Pfahl A, Roos T, Target aligned heliostat field layout for non-flat terrrain; 2012. http://hdl.handle.net/10204/5944 .TY - Conference Presentation AU - Buck, R AU - Pfahl, A AU - Roos, TH AB - 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. DA - 2012-05 DB - ResearchSpace DP - CSIR KW - Solar tower KW - Heliostat field layout KW - Ray tracing KW - Target aligned heliostat KW - Canting angle LK - https://researchspace.csir.co.za PY - 2012 T1 - Target aligned heliostat field layout for non-flat terrrain TI - Target aligned heliostat field layout for non-flat terrrain UR - http://hdl.handle.net/10204/5944 ER -