Thermal receiver and solar thermal power generation device

Abstract

A thermal receiver includes a heat absorption body and a support body. The heat absorption body is made of at least one honeycomb unit having a plurality of flow paths arranged for circulation of a heat medium. The support body supports the heat absorption body and allows circulation of the heat medium. The heat absorption body includes silicon carbide and is supported at a position away from an inner surface of the support body by a predetermined distance.

1 . A thermal receiver comprising:
 a heat absorption body made of at least one honeycomb unit having a plurality of flow paths arranged for circulation of a heat medium;   a support body which supports the heat absorption body and which allows circulation of the heat medium; and   the heat absorption body including silicon carbide and being supported at a position away from an inner surface of the support body by a predetermined distance.   
     
     
         2 . The thermal receiver according to  claim 1 ,
 wherein a holding material including an inorganic fiber is interposed between the heat absorption body and the support body.   
     
     
         3 . The thermal receiver according to  claim 1 ,
 wherein the heat absorption body is supported by fixing members provided in the support body, and an air layer is present between the heat absorption body and the support body excluding the fixing members.   
     
     
         4 . The thermal receiver according to  claim 1 ,
 wherein an inorganic heat insulating member is interposed between the heat absorption body and the support body.   
     
     
         5 . The thermal receiver according to  claim 2 ,
 wherein the holding material is made of an alumina-silica fiber, an alumina fiber or a silica fiber.   
     
     
         6 . The thermal receiver according to  claim 5 ,
 wherein a composition ratio of alumina to silica (alumina/silica) is from 60/40 to 80/20.   
     
     
         7 . The thermal receiver according to  claim 1 ,
 wherein, when a cross-sectional area of the heat absorption body in a plane parallel to a surface of the heat absorption body, to which solar light is radiated, is indicated by A, and an opening area of the support body including the plane is indicated by B,   an area proportion of a heat insulating region, which is represented by a following formula (1), is 5% to 50%,
   Area proportion of a heat insulating region (%)=( B−A )×100 /B   (1).
 
   
     
     
         8 . The thermal receiver according to  claim 1 ,
 wherein the heat absorption body is made of porous silicon carbide.   
     
     
         9 . The thermal receiver according to  claim 1 ,
 wherein the heat absorption body includes porous silicon carbide, and silicon that fills up pores in the porous silicon carbide.   
     
     
         10 . The thermal receiver according to  claim 8 ,
 wherein porosity of the porous silicon carbide is 35% to 60%, and an average pore diameter is 5 μm to 30 μm.   
     
     
         11 . The thermal receiver according to  claim 1 ,
 wherein the heat absorption body is made of dense silica carbide.   
     
     
         12 . The thermal receiver according to  claim 1 ,
 wherein the plurality of flow paths are provided in the heat absorption body at 31.0 paths/cm 2  to 93.0 paths/cm 2 , and a thickness of a wall portion between each of the plurality of flow paths in the heat absorption body is 0.1 mm to 0.5 mm.   
     
     
         13 . A solar thermal power generation device comprising the thermal receiver according to  claim 1 .