Heat collection receiver and solar thermal power generation device

Abstract

A heat collection receiver includes a heat absorption body and a support body. The heat absorption body includes at least one honeycomb unit in which a plurality of flow paths through which a heat medium passes are provided in parallel with each other. The at least one honeycomb unit includes porous silicon carbide and silicon that fills pores in the porous silicon carbide. A surface region of the at least one honeycomb unit includes a porous layer which includes pores in a predetermined depth from the surface. The surface region is irradiated with solar light. The pores of the porous layer are not filled with the silicon. The support body accommodates and supports the heat absorption body and the heat medium flows through the support body.

1 . A heat collection receiver comprising:
 a heat absorption body that includes at least one honeycomb unit in which a plurality of flow paths through which a heat medium passes are provided in parallel with each other, the at least one honeycomb unit including porous silicon carbide and silicon that fills pores in the porous silicon carbide, a surface region of the at least one honeycomb unit including a porous layer which includes pores in a predetermined depth from the surface, the surface region being irradiated with solar light, the pores of the porous layer being not filled with the silicon; and   a support body which accommodates and supports the heat absorption body and through which the heat medium flows.   
     
     
         2 . The heat collection receiver according to  claim 1 ,
 wherein the at least one honeycomb unit further includes porous carbon, and   the surface region of the at least one honeycomb unit includes a porous carbon layer.   
     
     
         3 . The heat collection receiver according to  claim 1   wherein the surface region of the at least one honeycomb unit has a depth of 500 nm or more from the surface.   
     
     
         4 . The heat collection receiver according to  claim 1 ,
 wherein the at least one honeycomb unit includes the flow paths of 31.0 to 93.0 per cm 2 , a thickness of a wall portion between the flow paths in the at least one honeycomb unit is 0.1 to 0.5 mm, a porosity of the porous silicon carbide is 35 to 60%, and an average pore size is 5 to 30 μm.   
     
     
         5 . The heat collection receiver according to  claim 1 ,
 wherein a heat insulation material is interposed between the heat absorption body and the support body.   
     
     
         6 . The heat collection receiver according to  claim 1 ,
 wherein the at least one honeycomb unit includes a plurality of honeycomb units and the heat absorption body is configured in such a manner that the plurality of honeycomb units are bonded to each other through an adhesive layer.   
     
     
         7 . The heat collection receiver according to  claim 6 ,
 wherein the heat absorption body is configured in such a manner that the plurality of honeycomb units are bonded to each other through a silicon layer that is formed on a side surface of the plurality of honeycomb units.   
     
     
         8 . A solar thermal power generation device comprising the heat collection receiver according to  claim 1 .