Latent heat accumulator system comprising a latent heat accumulator and method for operating a latent heat accumulator system

Abstract

A latent heat storage system includes at least one latent heat storage device which contains a storage medium with latent heat, at least one extraction circuit by means of which, in accordance with the intended purpose, heat can be extracted from the storage medium, and at least one regeneration circuit by means of which, in accordance with the intended purpose, heat can be supplied into the storage medium. The at least one latent heat storage device includes at least one extraction heat exchanger which is in contact with the storage medium and can be connected to the extraction circuit, and at least one regeneration arrangement within the storage medium, which can be connected to the regeneration circuit. A coupling device is provided, by which the at least one extraction heat exchanger can be at least temporarily coupled to the at least one regeneration arrangement for common heat extraction from the storage medium or for common heat supply into the storage medium. A corresponding operating method is also provided.

1 . A latent heat storage system comprising at least one latent heat storage device which contains a storage medium with latent heat, at least one extraction circuit by means of which, during normal operation, in accordance with the intended purpose, heat can be extracted from the storage medium, and at least one regeneration circuit by means of which, during normal operation, in accordance with the intended purpose, heat can be supplied into the storage medium, wherein the at least one latent heat storage device comprises
 at least one extraction heat exchanger in contact with the storage medium, which can be connected to the extraction circuit, and   at least one regeneration arrangement within the storage medium, which can be connected to the regeneration circuit,   a coupling device is provided, by means of which the at least one extraction heat exchanger can be at least temporarily coupled to the at least one regeneration arrangement for common heat extraction from the storage medium or for common heat supply into the storage medium.   
     
     
         2 . The latent heat storage system according to  claim 1 , for temporary common heat extraction from the storage medium, the coupling device connects the at least one regeneration arrangement and the at least one extraction heat exchanger jointly to a heat source, or in that, for temporary common heat supply into the storage medium, the coupling device connects the at least one extraction heat exchanger and the at least one regeneration arrangement jointly to a heat sink. 
     
     
         3 . The latent heat storage system according to  claim 1 , the at least one regeneration circuit, as regeneration arrangement, has a regeneration heat exchanger. 
     
     
         4 . The latent heat storage system according to  claim 3 , the heat carrier media from extraction heat exchanger and regeneration heat exchanger, for common heat extraction from the storage medium, or for common heat supply into the storage medium, can be led into a common supply line to the heat source or to the heat sink. 
     
     
         5 . The latent heat storage system according to  claim 1 , the regeneration arrangement of the at least one regeneration circuit has the storage medium as heat carrier medium, and, for common heat extraction from the storage medium or for common heat supply into the storage medium, it can be coupled via a heat exchanger in the regeneration circuit with the heat carrier medium of the at least one extraction heat exchanger. 
     
     
         6 . The latent heat storage system according to  claim 1 , the coupling device comprises a mixing element that can be closed-loop and/or open-loop controlled. 
     
     
         7 . The latent heat storage system according to  claim 1 , a closed-loop and/or open-loop control device is provided, which actuates the coupling device depending on at least one operating parameter of the latent heat storage device and/or of the latent heat storage system. 
     
     
         8 . A method for operating a latent heat storage system according to any one of the preceding claims, wherein the latent heat storage system comprises at least one latent heat storage device which contains a storage medium with latent heat, at least one extraction circuit by means of which, during normal operation, in accordance with the intended purpose, heat is removed from the storage medium, and at least one regeneration circuit by means of which, during normal operation, in accordance with the intended purpose, heat is supplied into the storage medium, wherein the at least one latent heat storage device comprises
 at least one extraction heat exchanger in contact with the storage medium, which is connected to the extraction circuit, and   at least one regeneration arrangement within the storage medium, which is connected to the regeneration circuit,   at least temporarily, the at least one extraction heat exchanger is coupled to the at least one regeneration arrangement for common heat extraction from the storage medium or for common heat supply into the storage medium.   
     
     
         9 . The method according to  claim 8 , the at least one extraction heat exchanger and the at least one regeneration arrangement are coupled only up to a predetermined icing degree of the extraction heat exchanger with respect to a volume which is capable of freezing in accordance with the intended purpose. 
     
     
         10 . The method according to  claim 8 , in a first operating mode for common teat supply into the storage medium, the at least one extraction heat exchanger and the regeneration arrangement of the at least one regeneration circuit are connected together and connected to a heat source. 
     
     
         11 . The method according to  claim 8 , in a second operating mode, for common heat extraction from the storage medium, the regeneration arrangement of the at least one regeneration circuit and the at least one extraction heat exchanger are connected together and connected to a heat sink. 
     
     
         12 . The method according to  claim 11 , the second operating mode is set when the temperature of the storage medium is less than 10° C. 
     
     
         13 . The method according to  claim 8 , in partial-load operation, a coupling strength between extraction heat exchanger and regeneration arrangement is changed depending on a set point temperature of the heat carrier media and/or a set point power of the heat source or heat sink. 
     
     
         14 . The method according to  claim 8 , in full-load operation, the flow through the extraction heat exchanger and the regeneration arrangement is at a maximum.