High-temperature heat accumulator

Abstract

The invention relates to a heat accumulator for storing thermal energy in at least one heat accumulator block, which heat accumulator has a removal device for removing stored thermal energy. For the uniform removal of energy from the accumulator, the heat accumulator block and the removal device according to the invention are separate from each other and can be moved in relation to each other. At least one heat-exchanger surface for transferring heat from a fluid or an electrical heating element into the heat accumulator block can be provided in the heat accumulator block. For the removal of thermal energy from the heat accumulator block, the removal device can have at least one evaporator surface for producing a phase change in a heat-transfer fluid.

1 . A heat accumulator for storing thermal energy in at least one heat accumulator block and at least one removal device for removing stored thermal energy, characterized in that the heat accumulator block and the removal device are formed separately and displaceably in relation to one another. 
     
     
         2 . The heat accumulator as claimed in  claim 1 , characterized in that at least one heat-exchanger surface for a heat transfer from a fluid or an electrical heating element into the heat accumulator block is provided in the heat accumulator block. 
     
     
         3 . The heat accumulator as claimed in  claim 1 , characterized in that, for the removal of thermal energy from the heat accumulator block, the removal device has at least one evaporator surface, for producing a phase change in a heat-transfer fluid or for further superheating of a fluid that has already exceeded the point of phase change. 
     
     
         4 . The heat accumulator as claimed in  claim 3 , characterized in that the evaporator surface is preferably formed by the inside surface of at least one pipe, which is preferably embedded in a block of which the material corresponds in particular to the material of the heat accumulator block. 
     
     
         5 . The heat accumulator as claimed in  claim 1 , characterized in that the heat accumulator block is formed as at least partially enclosing the removal device. 
     
     
         6 . The heat accumulator as claimed in  claim 1 , characterized in that the heat accumulator block is concavely formed in regions and the removal device is at least partially convexly formed in an enclosing manner. 
     
     
         7 . The heat accumulator as claimed in  claim 1 , characterized in that the heat accumulator block and the removal device are arranged in a common housing, which preferably has a negative pressure. 
     
     
         8 . The heat accumulator as claimed in  claim 1 , characterized in that the heat accumulator block and the removal device are arranged in a common, preferably vertical axis, the distance from the heat accumulator block and the removal device being formed as changeable by motor and preferably the weight of the moved part of the heat accumulator block or the removal device being formed as at least partially compensated. 
     
     
         9 . The heat accumulator as claimed in  claim 1 , characterized in that an amount of a heat-conducting fluid is provided in a depression formed by the heat accumulator block. 
     
     
         10 . A method for controlling a removal rate from a heat accumulator as claimed in  claim 1  in an open-loop or closed-loop manner, characterized in that a distance from the heat accumulator block and the removal device is changed. 
     
     
         11 . The use of a heat accumulator as claimed in  claim 1 , for heating purposes in buildings.