A 252m target-aligned research heliostat with closed-loop control, with a theoretical concentration of 80 suns, has been built at CSIR in South Africa. The heliostat has four degrees of freedom: Azimuth, Elevation, Rotation and Pitch. A control system making use of a solar tracker has been developed and tested on a 1.252m target-aligned miniheliostat. A tracking accuracy of 3.3 milliradians was obtained. A good focal spot has been obtained with the 252m target-aligned research heliostat.
Reference:
Roos, TH, et al. 2007. 25m2 target-aligned heliostat with closed-loop control. SES Solar World Congress 2007: Solar Energy and Human Settlement. Beijing, China. 18-21 September 2007, 8p.
Roos, T., Zwane, N., Kruger, E., Perumal, S., & Cathro, R. (2007). 25m2 target-aligned heliostat with closed-loop control. http://hdl.handle.net/10204/1105
Roos, TH, NX Zwane, E Kruger, S Perumal, and R Cathro. "25m2 target-aligned heliostat with closed-loop control." (2007): http://hdl.handle.net/10204/1105
Roos T, Zwane N, Kruger E, Perumal S, Cathro R, 25m2 target-aligned heliostat with closed-loop control; 2007. http://hdl.handle.net/10204/1105 .
