Latent heat storage system having a latent heat storage device and method for operating a latent heat storage 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 heat pump coupled to the latent heat storage device, at least one extraction circuit which has a first heat carrier medium and with which, during normal operation, in accordance with the intended purpose, heat can be extracted from the storage medium and supplied to the heat pump on the input side, and an extraction heat exchanger which is in contact with the storage medium, wherein the extraction heat exchanger is connected to the extraction circuit. Between the extraction heat exchanger and the heat pump, a coupling device is arranged in a connection line, which at least temporarily supplies a second heat carrier medium, which can be heated by at least one heat source, into a section of the connection line. A method for operating a latent heat storage system 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 heat pump coupled to the latent heat storage device,   at least one extraction circuit which has a first heat carrier medium and with which, during normal operation, in accordance with the intended purpose, heat can be extracted from the storage medium and supplied to the heat pump on the input side, and   an extraction heat exchanger which is in contact with the storage medium, wherein the extraction heat exchanger is connected to the extraction circuit,   wherein,   between the extraction heat exchanger and the heat pump, a coupling device is arranged in a connection line, which at least temporarily supplies a second heat carrier medium, which can be heated by at least one heat source, into a section of the connection line.   
     
     
         2 . The latent heat storage system according to  claim 1 , wherein the section into which the second heat carrier medium is admixed is arranged between coupling device and heat pump. 
     
     
         3 . The latent heat storage system according to  claim 1 , wherein at least one regeneration circuit is provided with the second heat carrier medium, with which, during normal operation, in accordance with the intended purpose, heat can be supplied to the storage medium from at least one heat source,
 wherein the at least one latent heat storage device comprises a regeneration arrangement within the storage medium, wherein the regeneration arrangement is connected to the regeneration circuit.   
     
     
         4 . The latent heat storage system according to  claim 3 , wherein the coupling device fluidically connects the regeneration circuit to the heat pump and the regeneration device is at least partially bypassed. 
     
     
         5 . The latent heat storage system according to  claim 3 , wherein extraction circuit and regeneration circuit are temporarily in fluidic connection by connection lines, wherein a first connection line connects a section of the extraction circuit downstream or upstream of a conveyance means to a connection line between regeneration device and heat source of the regeneration circuit, and a second connection line connects the coupling device to a section of the regeneration circuit downstream or upstream of a conveyance means in the regeneration circuit. 
     
     
         6 . The latent heat storage system according to  claim 1 , wherein the coupling device comprises an element that can be closed-loop and/or open-loop controlled. 
     
     
         7 . The latent heat storage system according to  claim 1 , wherein a closed-loop control 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 . The latent heat storage system according to  claim 1 , wherein the at least one regeneration circuit has an air-source collector as heat source. 
     
     
         9 . The latent heat storage system according to  claim 1 , wherein the regeneration device has a heat exchanger arranged in the storage medium. 
     
     
         10 . The latent heat storage system according to  claim 1 , wherein the regeneration device has one or more inflows and outflows in the latent heat storage device, and the storage medium circulates at least partially in the regeneration circuit. 
     
     
         11 . 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 heat pump coupled to the latent heat storage device and at least one extraction circuit which has a first heat carrier medium and with which, during normal operation, in accordance with the intended purpose, heat is extracted from the storage medium and supplied to the heat pump on the input side, 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,
 wherein   at least temporarily a second heat carrier medium, which is heated by at least one heat source, is supplied into a section of the connection line.   
     
     
         12 . The method according to  claim 11 , wherein, via at least one regeneration circuit with the second heat carrier medium, during normal operation, in accordance with the intended purpose, heat is supplied into the storage medium from at least one heat source,
 wherein the at least one latent heat storage device comprises a regeneration arrangement within the storage medium, which is connected to the regeneration circuit.   
     
     
         13 . The method according to  claim 11 , wherein the second heat carrier medium is supplied with variable volume flow, in particular wherein the volume flow of the second heat carrier medium is set depending on a feed temperature of the heat pump. 
     
     
         14 . The method according to  claim 11 , wherein the second heat carrier medium is supplied when a predetermined icing degree of the latent heat storage device with respect to a volume f capable of freezing in accordance with the intended purpose has been reached. 
     
     
         15 . The method according to  claim 11 , wherein the second heat carrier medium is supplied when a temperature of the first heat carrier medium of the extraction circuit is less than or equal to 1° C.; and the second heat carrier medium of the at least one heat source is hotter than the first heat carrier medium.