| 摘要 |
<p>The present invention provides a secondary optical system (3) able to increase the efficiency in collecting the solar radiation concentrated by primary mirrors (2) in "beam-down" plant configurations. Such secondary optical system is formed at least by two reflectors (31-38)- preferably in form of plane mirrors arranged at different heights - oriented so as to associate to each one thereof a subsection of a primary field of heliostats. Such plurality of secondary reflectors - each one associated to a different primary focus F1,i (i = l,...,n) corresponding to a subset of primary concentrators - allows concentrating the solar rays towards a single secondary focus F2.</p> |
