Thermal storage system

Abstract

The invention relates to a thermal storage system for storing thermal energy, comprising a solid storage which comprises a plurality of storage blocks with their outer sides arranged relative to one another, wherein the storage blocks comprise at least one continuous opening arranged in the longitudinal direction and/or at least one recess formed in the longitudinal direction at their outer side, and are arranged relative to one another such that at least one channel comprising an inlet opening and an outlet opening spaced apart from the inlet opening is formed by the recess and/or the continuous opening, a heat-carrying medium which is at least in portions in direct contact with the channel, a charging circuit comprising a first supply means connected to the inlet opening of the channel for supplying thermally charged heat-carrying medium and a first draining means connected to the outlet opening and/or a discharge circuit comprising a second draining means connected to the inlet opening of the channel for draining the thermally charged heat-carrying medium, and a second supply means connected to the outlet opening for compensating the drained heat-carrying medium.

1 . Thermal storage system for storing thermal energy, comprising
 a storage comprising a plurality of storage blocks with their outer sides arranged relative to each other, wherein the storage blocks comprise at least one continuous opening disposed in the longitudinal direction and/or at least one recess disposed in the longitudinal direction, and are arranged relative to each other so that at least one channel with an inlet opening and an outlet opening spaced apart from the inlet opening is formed by the recess and/or the continuous opening;   a heat-carrying medium which is in direct contact at least in portions with the channel;   a charging circuit comprising a first supply means connected to the inlet opening of the channel for supplying thermally charged heat-carrying medium and a first draining means connected to the outlet opening to compensate for the supplied heat-carrying medium; and/or a discharge circuit comprising a second draining means connected to the inlet port of the channel for draining the thermally charged heat-carrying medium, and a second supply means connected to the outlet opening to compensate for the drained heat-carrying medium, wherein   the storage blocks are made of fly ash and/or blast furnace slag.   
     
     
         2 . Thermal storage system according to  claim 1 , wherein the storage blocks comprise a first end face and a second end face arranged in the longitudinal direction of a storage block and spaced apart from the first end face, the outer sides are formed between the first end face and the second end face parallel to the longitudinal direction, wherein the first outer side is formed parallel to and spaced apart from the second outer side and the third outer side is formed parallel to and spaced apart from the fourth outer side. 
     
     
         3 . Thermal storage system according to  claim 2 , wherein the recess is formed in a corner region between the first outer side and the third outer side and/or in a corner region between the first outer side and the fourth outer side and/or in the second outer side. 
     
     
         4 . Thermal storage system according to  claim 1 , wherein the storage blocks comprise first connection elements at the first end face and/or first connection receptacles corresponding to the first connection elements at the second end face. 
     
     
         5 . Thermal storage system according to  claim 4 , wherein the first connection elements are dovetail connections and the first connection receptacles are corresponding tines. 
     
     
         6 . Thermal storage system according to  claim 1 , wherein the storage blocks comprise second connection elements at the first outer side and/or second connection receptacles corresponding to the second connection elements at the second outer side. 
     
     
         7 . Thermal storage system according to  claim 1 , wherein the storage blocks are arranged relative to each other so that the channel is formed meandering. 
     
     
         8 . Thermal storage system according to  claim 1 , wherein a valve device is disposed upstream of the inlet opening and/or the outlet opening. 
     
     
         9 . Thermal storage system according to  claim 1 , wherein the storage blocks comprise first and/or second connection elements which are embedded in the storage blocks at the inlet opening and at the outlet opening and which are formed form-fittingly with the channel and extend this channel outside of the storage blocks in order to connect the form-fitting contact with the heat-carrying medium and the first and/or second connection element of the next storage block. 
     
     
         10 . Thermal storage system according to  claim 1 , wherein the first and/or second connection elements are made of a temperature-resistant steel, which has been previously processed by form-giving methods, and/or wherein a connection between first and/or second connection elements of two storage blocks which are in mutually contact is configured as a welded and/or screw connection. 
     
     
         11 . Thermal storage system according to  claim 1 , wherein protruding first and/or second connection elements are sheathed with sleeves, which fit form-fittingly between adjacent storage blocks ( 14 ) around the first and/or second connection elements in order to store additional energy and to insulate the first and/or second connection elements. 
     
     
         12 . Thermal storage system according to  claim 11 , wherein the sleeves are configured to supplement an outer shape of the storage blocks such that a continuous shaping over a plurality of storage blocks ( 14 ) and first and/or second connection elements is obtained. 
     
     
         13 . Use of a thermal storage system according to  claim 1  for storing thermal energy. 
     
     
         14 . Method of storing thermal energy, comprising the steps of:
 providing a thermal storage system according to  claim 1 , wherein   for thermal charging of the storage blocks via the charging circuit:
 thermally heated heat-carrying medium is supplied via the inlet opening to the channel; and 
 thermally discharged heat-carrying medium is drained via the outlet opening from the channel; and 
   for thermal discharging the storage blocks via the discharge circuit:
 thermally charged heat-carrying medium is drained via the inlet opening; and thermally discharged heat-carrying medium is supplied via the outlet opening to the channel.