Solar radiation receiver comprising a quartz window system for the closure of the receiver

Abstract

A solar radiation receiver includes a quartz window system for the closure of the receiver having intermediate tubes/bars ( 1 M) and end tubes/bars ( 1 E) arranged in parallel forming a sheet contiguously to close an opening in a delimiting surface of the solar receiver and a seal ( 1 A) which has a cross section with the shape of an eight or convex lens, being the seal ( 1 A) located between every two tubes/bars ( 1 M, 1 E). The seal ( 1 A) having a first auxiliary generatrix ( 1 A 1 ) in a throat of the cross section. The intermediate tubes/bars ( 1 M) and the end tubes/bars ( 1 E) include respectively a first intermediate ( 1 M 1 ) and an end generatrix ( 1 E 1 ) in contact with the first auxiliary generatrix ( 1 A 1 ), forming a union wall of the seal ( 1 A) with an intermediate tube/bar ( 1 M) and an end tube/bar ( 1 E). The end tubes/bars ( 1 E) include a second external generatrix ( 1 E 2 ) contacting an edge of the opening forming a union wall of the end tube/bar ( 1 E) with the edge of the opening.

1 . A solar radiation receiver comprising a quartz window system for the closure of the receiver, the quartz window system comprises:
 a plurality of intermediate tubes/bars and a plurality of end tubes/bars arranged:
 in parallel forming a sheet with an inner face and an outer face; 
 contiguously to form a resistant structure of the sheet and to close an opening in a delimiting surface of the solar receiver; 
   sealing means having a cross section selected between a substantially eight shape and convex lens, the sealing means being located between every two tubes/bars;   wherein:   the sealing means comprise a first auxiliary generatrix in a throat of the cross section;   the intermediate tubes/bars comprise a first intermediate generatrix in contact with the first auxiliary generatrix, to form a union wall of the sealing means with an intermediate tube/bar;   the end tubes/bars comprise a first end generatrix in contact with the first auxiliary generatrix, to form a union wall of the sealing means with an end tube/bar ( 1 E);   the end tubes/bars comprise a second end generatrix ( 1 E 2 ) arranged to contact an edge of the opening to form a union wall of the end tube/bar ( 1 E) with the edge of the opening.   
     
     
         2 . The solar radiation receiver according to  claim 1 , wherein the tubes/bars have a cross section selected between circular and polygonal. 
     
     
         3 . The solar radiation receiver according to  claim 1 , wherein the tubes have an open cross section to reduce a number of surfaces to be crossed by solar radiation. 
     
     
         4 . The solar radiation receiver according to  claim 1 , wherein the tubes/bars have a geometry and dimensions arranged to withstand the pressure difference between the inner face and the outer face. 
     
     
         5 . The solar radiation receiver according to  claim 1 , wherein the tubes/bars have a structure with a shape selected between arch and plane arranged to absorb dilatations without losing gas sealing. 
     
     
         6 . The solar radiation receiver according to  claim 1 , further comprising a flat glass pane enveloping the inner face arranged to cover the opening wherein:
 the flat glass pane comprises an inner surface oriented to the receiver cavity and an outer surface oriented to the inner face of the sheet;   the intermediate tubes/bars comprise a second intermediate generatrix in contact with the outer surface, to form a union wall of the flat glass pane with an intermediate tube/bar.   
     
     
         7 . The solar radiation receiver according to  claim 1 , wherein the sealing means are arranged to be pushed against the tubes/bars by a pressure difference between the inner face and the outer face, the geometry of the sealing means adapting to favor contact between the sealing means and the tubes/bars. 
     
     
         8 . The solar radiation receiver according to  claim 1 , further comprising refrigeration means to refrigerate the tubes/bars through gas flow in the interior and/or exterior of the tubes/bars. 
     
     
         9 . The solar radiation receiver according to  claim 1 , wherein the tubes/bars are covered, at least in part, by an antireflective layer or dichroic filter at different wavelengths. 
     
     
         10 . The solar radiation receiver according to  claim 1 , wherein the tubes/bars are covered, at least in part, by a refractive layer arranged to refract the solar rays in a desired direction, regardless of behavior of the quartz window.