Panel-based solar receiver

Abstract

The invention relates to a panel-based solar receiver for a thermal solar tower power plant ( 4 ), which comprises: a front panel ( 8 ), the external surface of which receives solar radiation ( 2 ) from the field of heliostats ( 3 ), a back panel ( 9 ), sealing elements ( 10 ) between the panels ( 8, 9 ), arranged at the lateral ends of both, an intake collector ( 5 ), located in the upper part of the panels ( 8, 9 ), where the heat transfer fluid enters the receiver ( 1 ) and an evacuation collector ( 6 ), located in the lower part of the panels ( 8, 9 ), where the heat transfer fluid leaves the receiver ( 1 ); wherein the front panel ( 8 ), back panel ( 9 ) and the two sealing elements ( 10 ) form the receiver body ( 16 ), which constitutes a passage for the heat transfer fluid ( 7 ) to travel through. Each solar tower can contain one or several panel-based receivers ( 1 ) and be arranged in series or in parallel, with the same or a different fluid ( 7 ) circulating there through.

1 - 24 . (canceled) 
     
     
         25 . A panel-based solar receiver ( 1 ) for a thermal solar tower power plant, comprising:
 a front panel ( 8 ) the external surface of which receives the solar radiation ( 2 ) from the field of heliostats ( 3 ),   a back panel ( 9 ),   sealing elements ( 10 ) between the panels ( 8 ,  9 ), arranged at the lateral ends of both,   at least one intake collector ( 5 ), located in the upper part of the panels ( 8 ,  9 ), where the heat transfer fluid enters the receiver ( 1 ) and   at least one evacuation collector ( 6 ), located in the lower part of the panels ( 8 ,  9 ), where the heat transfer fluid leaves the receiver ( 1 ),   
       wherein the front panel ( 8 ), back panel ( 9 ) and the sealing elements ( 10 ) form the central receiver body ( 16 ), which constitutes a passage for the heat transfer fluid ( 7 ) to travel through; 
       characterized in that the geometry of the panels ( 8 ,  9 ) has either a semi-spherical or semi-cylindrical curvature. 
     
     
         26 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the heat transfer fluid ( 7 ) that circulates inside the receiver ( 1 ) is the working fluid of the power cycle itself 
     
     
         27 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the heat transfer fluid ( 7 ) that circulates inside the receiver ( 1 ) is a heat transfer fluid that subsequently transmits its energy to the working fluid of the power cycle. 
     
     
         28 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the heat transfer fluid ( 7 ) that circulates through the inside of the receiver ( 1 ) is a fluid with a high energy extraction capacity. 
     
     
         29 . The panel-based solar receiver ( 1 ) according to  claim 28 , characterized in that the heat transfer fluid ( 7 ) is a molten metal. 
     
     
         30 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the geometry of the panels ( 8 ,  9 ) is of the flat panel variety. 
     
     
         31 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the geometry of the central body ( 16 ) is elliptical, wherein the ends corresponding to the larger axis of the ellipse ( 17 ) are straight, with rounded vertices. 
     
     
         32 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the central body ( 16 ) of the receiver ( 1 ) is rectangular. 
     
     
         33 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the geometry of the panels ( 8 ,  9 ) is a polygonal curve made up of straight sections. 
     
     
         34 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the fluid ( 7 ) intake ( 5 ) and evacuation ( 6 ) collectors are vertical and are envisaged as widened segments of the fluid ( 7 ) inlet and outlet ducts. 
     
     
         35 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that the back panel ( 9 ) is equipped with external insulation ( 15 ) that reduces loss via convection and radiation into the environment. 
     
     
         36 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that at least one of the front and back panels of the receiver contains elements for improving the transfer of heat to the fluid. 
     
     
         37 . The panel-based solar receiver ( 1 ) according to  claim 36 , characterized in that the element for improving heat transfer comprises roughness patterns on the walls of at least one of the panels ( 8 ,  9 ). 
     
     
         38 . The panel-based solar receiver ( 1 ) according to  claim 36 , characterized in that the element for improving heat transfer consists of corrugating the walls of at least one of the panels ( 8 ,  9 ). 
     
     
         39 . The panel-based solar receiver ( 1 ) according to  claim 36 , characterized in that the element for improving heat transfer comprises installing flaps along the walls of at least one of the panels ( 8 ,  9 ). 
     
     
         40 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that at least one of the collectors ( 5 ,  6 ) is provided with internal flaps. 
     
     
         41 . The panel-based solar receiver ( 1 ) according to  claim 25 , characterized in that each one of the receivers ( 1 ) constitutes an independent module and each solar tower ( 4 ) is equipped with at least one of them. 
     
     
         42 . A solar tower ( 4 ) characterized in that it comprises one or several receivers ( 1 ) like the ones described in  claim 25 . 
     
     
         43 . The solar tower ( 4 ) according to  claim 42 , characterized in that it comprises several receivers ( 1 ) arranged in series, i.e. one next to the other. 
     
     
         44 . The solar tower ( 4 ) according to  claim 43 , characterized in that it comprises three receivers arranged in series like the ones described in  claim 31 , wherein it is the assembly of the three receivers ( 1 ) in series that adjusts to the patch ( 2 ) or flow map of the solar radiation. 
     
     
         45 . The solar tower ( 4 ) according to  claim 42 , characterized in that it comprises several receivers ( 1 ) arranged in parallel, i.e. one behind the other. 
     
     
         46 . The solar tower ( 3 ) according to  claim 45 , characterized in that a single intermediate panel ( 11 ) is used between receivers, which acts as the back panel ( 9 ) of the front receiver and front panel ( 8 ) of the back receiver.