Solar heat receiver

Abstract

Heat-receiving pipes of a heat receiver have portions having high heat flux on at the side near an opening in a length direction and extending to positions outside of a casing in a radial direction. Expanded sections having an expanded pitch circle diameter constituted by the plurality of heat-receiving pipes are formed, and a heat input quantity per unit area of the heat-receiving pipe is decreased in the portions near the opening.

1 . A solar heat receiver comprising:
 a casing having an opening on which sunlight is incident; and   a plurality of heat-receiving pipes which are arranged in the casing in a circumferential direction of the casing and through which a heat medium is circulated,   wherein the heat-receiving pipes are configured so that portions having high heat flux on the opening side are extended to a radially outer position of the casing,   expanded sections constituted by the plurality of heat-receiving pipes and having an expanded pitch circle diameter are formed, and   the diameter of the heat-receiving pipe in the expanded section is greater than that of the heat-receiving pipe in a portion other than the expanded section.   
     
     
         2 . (canceled) 
     
     
         3 . The solar heat receiver according to  claim 1 , wherein a heat transfer accelerator is equipped inside the heat-receiving pipe in the expanded section.