Heat storage device

Abstract

A heat storage device for transferring heat indirectly between a fluid and a heat storing medium, and for storing transferred heat, includes a container that surrounds an interior of the container, the heat storing medium being located in this interior. A plurality of vertical tubes are arranged in the interior of the container, each of these tubes being fluidically connected to a vertical header tube by means of a lower end section. Each of the tubes has a plurality of heat transfer fins that contact the heat storing medium.

1 . A heat storage device for indirect heat transfer between a fluid and a heat storage medium, and also for storing transferred heat, having:
 a container that surrounds an interior space of the container, wherein the heat storage medium is arranged in the interior space,   
       characterized in that
 a multiplicity of vertical tubes is arranged in the interior space of the container, wherein the tubes are each surrounded by the heat storage medium, wherein the tubes are each flow-connected via a lower end section to a vertical header tube, wherein the tubes each have a multiplicity of heat transfer fins, wherein the heat transfer fins contact the heat storage medium. 
 
     
     
         2 . The heat storage device as claimed in  claim 1 , characterized in that the heat storage medium is a phase change material. 
     
     
         3 . The heat storage device as claimed in  claim 1 , characterized in that the fluid can be conducted into the tubes in two flow directions. 
     
     
         4 . The heat storage device as claimed in  claim 1 , characterized in that the tubes are each flow-connected at an upper end to a distributor in such a manner that the fluid is feedable into the respective tube via the distributor. 
     
     
         5 . The heat storage device as claimed in  claim 4 , characterized in that the distributor comprises a tube sheet in which the tubes are anchored. 
     
     
         6 . The heat storage device as claimed in  claim 4 , characterized in that the distributor comprises a further tube sheet in which the header tube is anchored. 
     
     
         7 . The heat storage device as claimed in  claim 1 , characterized in that the header tube is arranged centrally in the container, wherein the tubes are arranged distributed around the header tube. 
     
     
         8 . The heat storage device as claimed in  claim 1 , characterized in that the header tube has a heat insulation, wherein, in particular, the header tube is constructed as a double tube that comprises an inner tube and also an outer tube surrounding the inner tube, wherein the heat insulation is arranged in a ring gap between the inner tube and the outer tube of the header tube. 
     
     
         9 . The heat storage device as claimed in  claim 1 , characterized in that the flow connection between the tubes and the header tube comprises a header, wherein the tubes each open out via a lower opening of the respective tube into the header, and wherein the header tube opens out via a lower opening of the header tube into the header. 
     
     
         10 . The heat storage device as claimed in  claim 9 , characterized in that the header has a convex shell that delimits an interior space of the header, wherein, in particular, at least one upper region of the shell of the header is constructed so as to be spherical segment-shaped. 
     
     
         11 . The heat storage device as claimed in  claim 1 , characterized in that the interior space, for preventing cavities in the event of a solidification of the heat storage medium of the container, comprises a region surrounding the header tube, in which region none of the tubes is arranged.