Latent heat store

Abstract

A latent heat store is provided having a plurality of heat exchanger units ( 2 ) arranged alongside one another with each being at least one phase change store in which a heat exchanger fluid with the storage medium flows at least between adjacent heat exchanger units ( 2 ). Latent heat store improved heat management is achieved by at least one common intake ( 10 ) for supplying the heat exchanger fluid to the heat exchanger units ( 2 ) and for dividing this fluid into a plurality of separate partial flow sections and also at least one common drain ( 11 ) for discharging the heat exchanger fluid from the heat exchanger units ( 2 ) and for bringing all partial flow sections back together such that the heat exchanger units ( 2 ) of the stack ( 13 ) collectively exposed to the flow are connected in parallel to one another wherein a variety of flow patterns are provided.

1 . Latent heat store comprising a plurality of heat exchanger units ( 2 ) which are arranged alongside one another and each comprise at least one phase change store ( 14 ),
 wherein the phase change stores ( 14 ) comprise a storage medium which has a phase change during operation and is intended for the storage of heat energy,   wherein the heat exchanger units ( 2 ) are arranged within a heat exchanger housing ( 3 ,  8 ),   wherein a heat exchanger fluid for heat exchange with the storage medium can flow through at least between adjacent heat exchanger units ( 2 ),   wherein each heat exchanger unit ( 2 ) has at least one associated inflow point to expose the respective heat exchanger unit ( 2 ) to the flow of the heat exchanger fluid and an associated outflow point for the outflow of the heat exchanger fluid from the respective heat exchanger unit ( 2 ),   
       characterized
 in that at least one common intake ( 10 ) for supplying the heat exchanger fluid to the heat exchanger units ( 2 ) and for dividing said fluid into a plurality of separate partial flow sections and also at least one common drain ( 11 ) for discharging the heat exchanger fluid from the heat exchanger units ( 2 ) and for bringing all partial flow sections together are provided,
 such that the heat exchanger units ( 2 ) arranged between the intake ( 10 ) and the drain ( 11 ) form a stack ( 13 ) collectively exposed to the flow, and 
 such that the heat exchanger units ( 2 ) of the stack ( 13 ) collectively exposed to the flow are connected in parallel to one another, 
 
 wherein the inflow point of the heat exchanger unit ( 2 ) is arranged in the central region of the heat exchanger unit ( 2 ) and the outflow point of the heat exchanger unit ( 2 ) is arranged in the radially outwardly arranged casing region of the heat exchanger unit ( 2 ), 
 or wherein the inflow point of the heat exchanger unit ( 2 ) is arranged in the radially outwardly arranged casing region of the heat exchanger unit ( 2 ) and the outflow point of the heat exchanger unit ( 2 ) is arranged in the central region of the heat exchanger unit ( 2 ), 
 such that the heat exchanger fluid flows in the radial direction along the heat exchanger units ( 2 ) substantially over the entire cross section thereof, 
 wherein the length of all partial flow sections of the heat exchanger fluid from the intake ( 10 ) to the drain ( 11 ) is substantially of equal length. 
 
     
     
         2 . Latent heat store according to the preamble of  claim 1  or according to  claim 1 , characterized
 in that at least one common intake ( 10 ) for supplying the heat exchanger fluid to the heat exchanger units ( 2 ) and for dividing said fluid into a plurality of separate partial flow sections and also at least one common drain ( 11 ) for discharging the heat exchanger fluid from the heat exchanger units ( 2 ) and for bringing all partial flow sections together are provided,
 such that the heat exchanger units ( 2 ) arranged between the intake ( 10 ) and the drain ( 11 ) form a stack ( 13 ) collectively exposed to the flow, and 
 such that the heat exchanger units ( 2 ) of the stack ( 13 ) collectively exposed to the flow are connected in parallel to one another, 
 
 wherein the inflow point of the heat exchanger unit ( 2 ) is arranged in the central region of the heat exchanger unit ( 2 ) and the outflow point of the heat exchanger unit ( 2 ) is arranged in the radially outwardly arranged casing region of the heat exchanger unit ( 2 ), 
 or wherein the inflow point of the heat exchanger unit ( 2 ) is arranged in the radially outwardly arranged casing region of the heat exchanger unit ( 2 ) and the outflow point of the heat exchanger unit ( 2 ) is arranged in the central region of the heat exchanger unit ( 2 ), 
 such that the heat exchanger fluid flows in the radial direction along the heat exchanger units ( 2 ) substantially over the entire cross section thereof, 
 wherein the flow resistances of all partial flow sections of the heat exchanger fluid from the intake ( 10 ) to the drain ( 11 ) are substantially of the same magnitude. 
 
     
     
         3 . Latent heat store according to either of the preceding claims, characterized in that all heat exchanger units ( 2 ) have a substantially identical form. 
     
     
         4 . Latent heat store according to the preamble of  claim 1  or according to one of the preceding claims, characterized in that the heat exchanger units ( 2 ) have at least one spacer ( 16 ,  17 ,  31 ) for fixing a spacing for the heat exchanger fluid to flow through between the heat exchanger units ( 2 ). 
     
     
         5 . Latent heat store according to one of the preceding claims, characterized in that the phase change stores ( 14 ) comprise at least the spacers ( 17 ). 
     
     
         6 . Latent heat store according to one of the preceding claims, characterized in that the spacers ( 16 ,  31 ) are in the form of a bend ( 16 ,  31 ) of a heat exchanger unit ( 2 ). 
     
     
         7 . Latent heat store according to the preamble of  claim 1  or according to one of the preceding claims, characterized in that the heat exchanger units ( 2 ) have at least one anti-twist device ( 16 ,  15 ) for preventing twisting of heat exchanger units ( 2 ). 
     
     
         8 . Latent heat store according to one of the preceding claims, characterized in that the spacers ( 16 ,  17 ,  31 ) of the heat exchanger units ( 2 ) are in the form of an anti-twist device ( 16 ). 
     
     
         9 . Latent heat store according to one of the preceding claims, characterized in that the heat exchanger housing ( 3 ,  8 ) has at least one thermal insulation unit ( 9 ) as a sheathing. 
     
     
         10 . Latent heat store according to one of the preceding claims, characterized in that the insulation unit ( 9 ) is in the form of a vacuum insulation unit ( 9 ). 
     
     
         11 . Latent heat store according to one of the preceding claims, characterized in that the Vacuum insulation unit ( 9 ) at least in parts has a surface layer for reducing the emissions into the vacuum. 
     
     
         12 . Latent heat store according to one of the preceding claims, characterized in that the vacuum insulation unit ( 8 ) comprises at least one getter unit ( 25 ,  26 ) with a getter material. 
     
     
         13 . Latent heat store according to one of the preceding claims, characterized in that at least one electric heating element for heating the phase change stores ( 14 ) and/or heat exchanger units ( 2 ) is arranged within the heat exchanger housing ( 3 ,  8 ). 
     
     
         14 . Latent heat store according to one of the preceding claims, characterized in that the heating element is arranged between two adjacent heat exchanger units ( 2 ). 
     
     
         15 . Latent heat store according to one of the preceding claims, characterized in that the heating element is in the form of a heating foil.