Felix Tellez - SFERA

The optical quality is an issue: The combination ofimperfections (mirrors, canting, structure, tracking, …)lead to a loss of efficiency (“degraded sun”). An errorconvolution may be used to quantify the quality.Angulo solar (teta_s), [mrad]Error Solar (68.3% sign.),mradError estructuraError seguimiento solarError Total (68.3% sign.)Error Total (95% sign.)0.009599333 radianes0.0028 radianes0.001979899 radianes0.002828427 radianes0.004445222 radianes0.008712635 radianesSpherical curvature, no wavinessσ =σ+σ+σ2D2S2sp2cVariability ofFocal ImageSpherical curvature, with wavinessSTE with Central Receiver Systems F. TéllezSummer solstice, 7:30 a.m.Summer Solstice, solar noonSummer Solstice, 7:30 p.m.Slide 28