DE102019102955B3 - Heat storage device and method for storing or providing heat by means of a heat storage device - Google Patents

Abstract

In order to provide a heat storage device that can be loaded or unloaded with a high efficiency while being easier to manufacture, it is proposed that the heat transfer device have a first flow device and a second flow device, that the first flow device and the second flow device are each in thermal contact with the storage device and / or stand together that a first heat transfer medium can flow through the first flow device and a second heat transfer medium can flow through the second flow device, that the first flow device is fluidly separated from the second flow device and that the heat transfer device comprises at least one electrical heating element that can be selectively acted on by electrical energy, which is in thermal contact with at least one of the flow devices and / or with the storage device.

Description

The invention relates to a heat storage device, comprising a storage device which has a storage medium for storing heat, and a heat transfer device, through which heat can be supplied to or removed from the heat device, the heat transfer device having a first flow device and a second flow device, each of which are in thermal contact with the storage device and / or with one another, a first heat transfer medium being able to flow through the first flow device and a second heat transfer medium being able to flow through the second flow device and the first flow device being fluidically separated from the second flow device, and the heat transfer device being selectively at least one Electrical energy applied electrical heating element comprising at least one of the flow devices and / or with the storage device is in thermal contact.

The invention further relates to a method for storing or providing heat by means of a heat storage device.

From the WO 2011/069693 A1 a heat transfer tube with a tubular element is known which has a plurality of ribs arranged on the outer circumference of the tubular element and extending outwards. The ribs are formed on ring segments which encompass the tubular element and are fastened to one another with a spring-elastic tensioning device.

From the DE 10 2009 006 788 A1 A heat accumulator with a housing is known, in which a phase change material and a heat conducting structure surrounded by the phase change material are arranged.

From the DE 20 2010 015 920 U1 a heat accumulator is known which has a plurality of heat accumulator plates filled with latent heat accumulator material.

A heat storage device of the type mentioned is in the unpublished DE 10 2017 213 718 A1 described by the same applicant.

The DE 11 2012 002 387 T5 describes a thermal energy storage and heat exchanger unit with a solid-state thermal storage material, a heat transfer fluid and a device for introducing and discharging energy. The memory comprises at least one heat transfer container, wherein solid-state thermal storage material (concrete) is arranged around the heat transfer container. The heat transfer container contains the heat transfer fluid and the device for introducing and discharging energy, so that the entire heat-transferring convection and conduction takes place within the respective heat transfer container. An electrical heater can be used as a means of introducing energy, either alone or in combination with pipes that carry fluid.

The WO 2016/016428 A1 describes a device for energy storage using a phase change material and a corresponding energy storage method.

The invention has for its object to provide a heat storage device of the type mentioned, which can be loaded or unloaded with high efficiency with simplified manufacture.

This object is achieved in the heat storage device mentioned at the outset according to the invention with the features of the characterizing part of claim 1.

The first flow device and the second flow device are each in thermal contact with the storage device. This enables simple supply or removal of heat to or from the storage medium of the storage device.

In order to supply heat to the heat storage device, a hot first heat transfer medium flows through the first flow device, for example, which emits its heat to the storage medium via the heat transfer device. To remove heat from the heat storage device, for example, the second flow device is flowed through with a cold second heat transfer medium, to which the storage device releases its stored heat via the heat transfer device.

Due to the fluidic separation of the first flow device from the second flow device, different heat transfer media can be used to load and unload the heat storage device. As a result, for example, a first hot heat transfer medium can flow simultaneously through the first flow device and a second cold heat transfer medium can flow through the second flow device. This enables, for example, simultaneous loading and unloading of the heat storage device.

Fluidically separated is to be understood in particular to mean that the first flow device and the second flow device are separated from one another in a fluid-effective manner and / or that the first flow device and the second flow device each have completely separate flow paths for heat transfer fluid.

The first and the second heat transfer medium can be different substances. Alternatively, it is conceivable that the first heat transfer medium and the second heat transfer medium are identical substances.

A respective heat transfer medium can be a liquid or a gas, which in the present context can also be understood to mean mixtures of liquids or gases.

The first flow device and the second flow device are in thermal contact with one another in particular. This enables heat to be transferred from the first heat transfer medium to the second heat transfer medium (or vice versa).

The technical design of the first flow device or the second flow device can be optimized in each case on the basis of the physical parameters of the first heat transfer medium or of the second heat transfer medium. Relevant parameters of the heat transfer media flowing through the respective flow device are, for example, pressure and / or temperature. Other relevant parameters are, for example, a mass flow of the respective heat transfer medium and / or a corrosiveness of the respective heat transfer medium. Using the parameters mentioned, wall thicknesses or materials used for the respective flow device can be optimally selected.

The first flow device and / or the second flow device each comprise in particular one or more pipe elements through which the respective heat transfer medium can flow.

The heat transfer device of the heat storage device according to the invention further comprises at least one electric heating element. Electrical energy can be selectively applied to the heating element. For example, the heating element is optionally brought into electrical contact with an electrical energy supply device.

The at least one heating element is in thermal contact with at least one flow device and preferably both flow devices. In this way, heat given off by the heating element can be transferred to the first and / or the second heat transfer medium in order to load them.

Alternatively or additionally, the at least one heating element is in thermal contact with the storage device. This offers the advantage that heat emitted by the heating element can be transferred to the storage device in order to load it.

Selective activation of the at least one heating element enables the heat storage device to be used in a variety of ways. The exchange of heat between the heat transfer media with one another and / or with the storage device can be specifically supported in order to set an optimal operating point of the heat storage device.

It is advantageous that the at least one heating element is divided into two or more segments that can be acted upon independently or together with electrical energy. This gives the heat storage device greater versatility. Depending on which segment of the heating element is supplied with electrical energy, the heating element can emit spatially defined heat. This offers, for example, the possibility of applying heat from the heating element to the first and / or second heat transfer medium and / or the storage device at a defined spatial position.

In a preferred embodiment, thorough mixing of the storage medium due to different temperatures can be avoided by spatially selective transfer of heat from the at least one heating element to the storage device.

It can be provided that the segments are each acted upon individually with different electrical energy, so that the segments can have different temperatures. It can be provided that two or more segments are set to the same temperature.

In particular, the temperature of a respective segment can advantageously be controlled and / or regulated.

The segments are positioned in a row, for example, in an extension direction of the at least one heating element.

The at least one heating element can comprise, for example, a rod element. The The rod element can be a heating element. The rod element can, for example, be aligned parallel to the aforementioned tubular element of a flow device.

The storage device has, for example, a plurality of storage elements which are spatially separated from one another in particular.

The storage medium of the storage device is or comprises, for example, a phase change medium. This allows a large amount of heat to be stored within a defined temperature range. Furthermore, heat can be supplied to and / or heat can be removed from the phase change medium, in particular at an at least approximately constant temperature. As a result, heat can be supplied to and / or removed from the phase change medium with high efficiency.

It is expedient if the first flow device and / or the second flow device are / are each designed as a fluid circuit or each comprise a fluid circuit. As a result, heat can be supplied to the storage device in a technically simple manner or heat can be removed from it.

The first flow device and / or the second flow device each have, for example, completely separate fluid circuits.

In a preferred embodiment, the at least one heating element is elongated and at least partially straight. For example, the at least one heating element is aligned, at least in sections, parallel to a tubular element of at least one flow device.

In one embodiment of the invention, the heat transfer device comprises at least one heat transfer element, by means of which the first flow device and / or the second flow device and / or the at least one heating element on the one hand and the storage medium of the storage device on the other hand are thermally connected to one another. A thermal coupling between the first flow device and / or the second flow device and / or the heating element and the storage medium of the storage device can be produced in a simple manner by the at least one heat transfer element.

It is expedient if the at least one heat transfer element comprises or forms a receiving body, which forms a wall of the at least one heat transfer element surrounding an interior, and if the first flow device and / or the second flow device and / or the heating element through the interior of the at least one heat transfer element run. Sections of the first flow device and / or the second flow device and / or the at least one heating element can be fixed, for example, by means of the receiving body. A particularly good thermal coupling between the respective flow device and / or the heating element and the wall of the at least one heat transfer element can be produced by means of the receiving body. A thermal coupling between the flow devices with one another and / or the at least one heating element and at least one flow device can also be provided by means of the receiving body.

In particular, the receiving body comprises or forms a wall which surrounds an interior of the at least one heat transfer element. At least regions of the first flow device and / or the second flow device and / or the at least one heating element run through this interior, for example. The interior is preferably almost completely filled by the first flow device and / or the second flow device and / or the heating element.

The first flow device and / or the second flow device and / or the at least one heating element are fixed, for example, by means of the receiving body within the at least one heat transfer element.

For example, a plurality of receptacle bodies can be provided, or the receptacle body can be subdivided into individual, spaced-apart segments, which receptacle bodies or which segments are each positioned at a distance from one another in an extension direction of the flow devices and / or the at least one heating element. The provision of a plurality of receiving bodies or a plurality of segments makes it possible, for example, to interrupt the heat conduction between the receiving bodies or the segments. A possible temperature stratification in the storage device can be maintained in this way, as a result of which the storage medium can be deliberately kept at different temperature levels.

If, as explained below, a rib structure is provided, for example, as part of the receiving body or connected to it, rib structures are particularly the Receiving body separated from one another, or the segments of the receiving body have rib structures which are separate from one another.

It can be provided that the flow devices and the at least one heating element are arranged together in the interior of the at least one heat transfer element. For example, only one interior area is provided, in which both flow devices and a heating element are positioned.

Alternatively, it can be provided that the interior comprises interior areas separated from one another by the wall, the at least one heating element and at least one of the flow devices being arranged in different interior areas. For example, three interior areas are provided, two interior areas being assigned to the two flow devices and the third interior area being assigned to a heating element.

In a preferred embodiment, it is advantageous if the at least one heating element and the flow devices are positioned symmetrically in the interior with respect to at least one plane of symmetry or axis of symmetry.

Provision can be made for the at least one heating element to comprise a rod element, for example in the form of a heating rod, which runs at least in sections in an interior of the at least one heat transfer element. In particular, the rod element can be fixed in the interior of the at least one heat transfer element by means of the receiving body. The rod element can be arranged and in particular clamped in a particularly simple manner within the receiving body.

In particular, the first flow device and / or the second flow device can each comprise a tubular element which runs at least in sections in an interior of the at least one heat transfer element. The respective tubular element can be arranged and in particular clamped in a particularly simple manner within the receiving body.

In particular, the respective tubular element of the first flow device and / or the second flow device is fixed in the interior of the at least one heat transfer element by means of the receiving body.

In one embodiment of the invention, it can be provided that the rod element and / or the tubular element of the first flow device and / or the tubular element of the second flow device make thermal and / or mechanical contact with the wall of the at least one heat transfer element. A thermal contact creates, for example, a thermal coupling between the rod element and / or the respective tubular element and the wall of the at least one heat transfer element. A mechanical contact between the rod element and / or the tubular elements and the wall enables, in particular, a mechanically stable arrangement of the respective element within the at least one heat transfer element.

The rod element and / or the respective tubular element lie, for example, directly on the wall of the at least one heat transfer element.

The rod element and / or the tubular element of the first flow device and / or the tubular element of the second flow device are each arranged at a distance from one another, for example, within the receiving body. The rod element and the respective tubular elements are spatially separated from one another, for example, via a heat-conducting body, which is arranged in particular between the rod element and the respective tubular elements. The spaced apart arrangement of the rod element and the respective tubular elements can, for example, reduce thermomechanical stresses during operation of the heat storage device, which are generated in particular by varying the temperatures of the respective components.

It can be advantageous if the at least one heat transfer element has a heat-conducting body which makes thermal and / or mechanical contact with the at least one heating element and / or the first flow device and / or the second flow device. This produces an improved thermal coupling between the at least one heating element and / or the first flow device and / or the second flow device on the one hand and the at least one heat transfer element on the other hand.

For the same reason, it is advantageous if the heat-conducting body makes thermal and / or mechanical contact with a wall of the at least one heat transfer element.

The heat-conducting body is connected, for example, in one piece to the wall or the receiving body of the at least one heat transfer element.

In a preferred embodiment, the heat-conducting body comprises at least one Engagement element which is in engagement with a wall of the at least one heat transfer element. In this way, the mechanical stability of the heat transfer device can be increased. The heat-conducting body can engage, for example, between wall parts of the wall, which can in particular be braced together. This secures the heat sink in the correct target position. In addition, the at least one heating element and / or the first and / or second flow device can be secured in a desired position upon mechanical contact with the heat-conducting body.

It can be advantageous if a wall of the at least one heat transfer element is composed of a plurality of separate wall parts. Respective components of the at least one heating element and / or the first flow device and / or the second flow device can then be clamped, for example, between the separate wall parts.

In particular, at least two and, for example, all wall parts are essentially designed as identical parts. This enables a technically simple production of the at least one heat transfer element.

A receptacle body of the at least one heat transfer element is composed, for example, of a plurality of separate receptacle body parts, a receptacle body part in each case forming a wall part. Different receiving body parts are in particular essentially designed as identical parts.

It can be provided that the wall parts are connected to one another via a tensioning device. Different wall parts of the wall of the at least one heat transfer element can be connected in a simple manner by means of the tensioning device.

The tensioning device then has at least one spring-elastic tensioning element, with mutually adjacent wall parts being connected to one another via the at least one spring-elastic tensioning element. The at least one clamping element can, for example, be arranged on holding elements of adjacent wall parts. This enables a connection of different wall parts in a technically particularly simple manner.

The tensioning device also allows a compensation of possible thermomechanical stresses due to thermal expansion or contraction of components of the at least one heat transfer element.

Furthermore, it can be provided that the wall parts each have at least one holding element and that one or more spring-elastic tensioning elements are provided, which can each be arranged on a pair of holding elements and / or which each encompass a pair of holding elements, one or more pairs of Holding elements are formed between adjacent wall parts. By means of the at least one holding element, spring-elastic tensioning elements of the tensioning device can be positioned particularly easily on the wall parts of the wall of the at least one heat transfer element.

The at least one spring-elastic tensioning element is designed, for example, as a spring-elastic clamp. This clip comprises, for example, two legs which can be moved apart by overcoming a spring force. The clip is arranged, for example, on a pair of opposing holding elements in such a way that the limbs of the clip embrace and / or engage behind the holding elements of the pair.

An engagement element of the heat-conducting body can engage between adjacent holding elements, for example.

In particular, the rod element and / or at least one of the tubular elements of the first flow device and / or the second flow device are clamped between the wall parts of the at least one heat transfer element. The rod element and / or the respective tubular elements can thereby be arranged particularly simply in an interior of the at least one heat transfer element surrounded by the wall.

It is advantageous if the heat transfer device has a rib structure which comprises a plurality of ribs. A particularly effective thermal coupling between the heat transfer device and the storage medium of the storage device can be achieved by the rib structure.

In an operating state of the heat storage device, the rib structure is immersed in the storage medium of the storage device. This provides a particularly large contact area between the storage medium of the storage device and the ribs of the heat transfer device.

The rib structure contacts the storage medium of the storage device in particular materially and / or directly thermally. The rib structure is flowed around, for example, by the storage medium of the storage device.

It is expedient if ribs of the rib structure are positioned on an outside of a heat transfer element of the heat transfer device facing the storage medium. The ribs of the rib structure can thereby be arranged in a particularly simple manner on the heat transfer element of the heat transfer device.

Ribs are connected in one piece in particular to a wall or a wall part of the at least one heat transfer element. This creates a particularly stable mechanical connection between the ribs and the respective wall part. This also results in a particularly good thermal contact between the ribs and the wall or the wall part of the at least one heat transfer element.

The ribs of the rib structure are in particular integrally formed on the wall of the at least one heat transfer element.

A rib of the rib structure extends in particular starting from the wall of the at least one heat transfer element in a direction facing away from an interior of the at least one heat transfer element. A rib in particular comprises branches and / or ramifications, by means of which a strand of the rib is expanded into a plurality of sub-strands starting from the wall. As a result, the rib structure has, for example, a tree-like structure.

The rib structure comprises in particular a plurality of rib structure sections, each rib structure section being assigned to a wall part of the wall of the at least one heat transfer element.

The at least one heat transfer element is constructed in particular from a plurality of components, each component comprising a wall part and a rib structure section assigned to the wall part.

Each component comprising a wall part and a rib structure section is, for example, by a forming process such as Extruded presses manufactured. In this way, the wall part and the rib structure section are connected to one another in particular in one piece.

The ribs of the rib structure are in particular positioned on an outer side of a receiving body of the at least one heat transfer element, the receiving body being enclosed by the wall of the at least one heat transfer element.

According to the invention, a method for storing or providing heat by means of a heat storage device having the features of independent claim 18 is provided.

The method according to the invention preferably has one or more of the features and / or advantages described in connection with the heat storage device according to the invention.

In one embodiment of the method, it can be provided that heat is transferred from the first heat transfer medium to the second heat transfer medium, or the heat is transferred from the second heat transfer medium to the first heat transfer medium, or heat is transferred from the at least one heating element to at least one of the heat transfer media transfer.

In particular, heat is transferred from the first heat transfer medium to the second heat transfer medium (or vice versa) by means of the at least one heat transfer element of the heat transfer device.

The storage medium of the storage device is or comprises, for example, a phase change medium. The phase change medium comprises in particular nitrate salts or a mixture of different nitrate salts. It includes, for example, sodium nitrate and / or potassium nitrate and / or lithium nitrate.

A melting point of the phase change medium can be varied, for example, by means of different mixtures of the substances mentioned.

Alternatively, the phase change medium comprises, for example, a paraffin.

Pipe elements of the heat transfer device are made in particular of a heat-resistant steel.

A rod element of the at least one heating element is in particular made of a metal.

Wall parts of the wall and / or ribs of the rib structure and / or a heat-conducting body of the at least one heat transfer element of the heat transfer device are preferably made of an easily extruded material such as aluminum. To this The components mentioned can be produced in particular by means of a forming process, for example by means of an extrusion process.

Alternatively, ribs of the rib structure can be made of a graphite material, for example.

In one embodiment, ribs of the rib structure are produced by means of a bending process, such as sheet metal bending.

Alternatively, ribs of the rib structure can be produced by braiding and / or weaving wires. In this way, the ribs are produced, for example, from a wire mesh.

The first heat transfer medium and / or the second heat transfer medium are, for example, cold and / or hot water or water vapor.

The heat storage device described at the outset preferably comprises a multiple register which has at least two inputs and two outputs in order to separate the loading and unloading circuits from one another.

The heat storage device comprises, for example, a latent heat store in which two pipe registers are integrated.

For example, the heat storage device comprises a double tube register, in which the loading tubes are separated from the discharge tubes.

The heat storage device can be used in particular as a thermal heat store and / or heat buffer for industrial applications, for example for the efficient use of waste heat. It is suitable, for example, for use in connection with processes with time-varying heat emission and / or heat absorption. The heat storage device can be used, for example, as an energy store in thermal power stations.

Further preferred features and / or advantages of the invention are the subject of the following description and the drawing of exemplary embodiments.

• 1 eine schematische Darstellung eines Ausführungsbeispiels einer Wärmespeichervorrichtung, welche eine Mehrzahl von Speicherelementen umfasst;
• 2 einen schematischen Querschnitt eines ersten Ausführungsbeispiels eines Wärmeübertragungselements der Wärmespeichervorrichtung, bei welchem eine Wandung des Wärmeübertragungselements aus einer Mehrzahl von Wandungsteilen zusammengesetzt ist, wobei die Wandungsteile zumindest näherungsweise eine 3-Form aufweisen;
• 3 schematisch eine Seitenansicht eines Heizelementes der Wärmespeichervorrichtu ng;
• 4 schematisch eine Teildarstellung einer Wärmeübertragungseinrichtung der Wärmespeichervorrichtung, wobei voneinander beabstandete Aufnahmekörper und Rippenstrukturen eines Wärmeübertragungselementes vorgesehen sind;
• 5 einen schematischen Querschnitt eines zweiten Ausführungsbeispiels eines Wärmeübertragungselements, bei welchem ein Wärmeleitkörper vorgesehen ist und bei welchem die Wandungsteile spiegelsymmetrisch zu einer Mittelebene des Wärmeübertragungselements liegen und näherungsweise eine C-Form aufweisen;
• 6 einen schematischen Querschnitt eines dritten Ausführungsbeispiels eines Wärmeübertragungselements, bei welchem drei Wandungsteile vorgesehen sind, die zumindest näherungsweise eine U-Form aufweisen und jeweils einen Winkel von ca. 120° bezüglich einer Achse des Wärmeübertragungselementes überdecken; und
• 7 einen schematischen Querschnitt eines vierten Ausführungsbeispiels eines Wärmeübertragungselements, bei welchem die Wandung drei Innenraumbereiche umgibt, die Rohrelemente und ein Stabelement aufnehmen.

The drawings show:

• 1 a schematic representation of an embodiment of a heat storage device comprising a plurality of storage elements;
• 2 a schematic cross section of a first embodiment of a heat transfer element of the heat storage device, in which a wall of the heat transfer element is composed of a plurality of wall parts, the wall parts at least approximately having a 3-shape;
• 3 schematically shows a side view of a heating element of the heat storage device;
• 4 schematically shows a partial representation of a heat transfer device of the heat storage device, wherein spaced-apart receiving bodies and rib structures of a heat transfer element are provided;
• 5 a schematic cross section of a second embodiment of a heat transfer element, in which a heat-conducting body is provided and in which the wall parts are mirror-symmetrical to a central plane of the heat transfer element and approximately have a C-shape;
• 6 a schematic cross section of a third embodiment of a heat transfer element, in which three wall parts are provided, which have at least approximately a U-shape and each cover an angle of approximately 120 ° with respect to an axis of the heat transfer element; and
• 7 a schematic cross section of a fourth embodiment of a heat transfer element, in which the wall surrounds three interior areas that accommodate tubular elements and a rod element.

Identical or functionally equivalent elements are provided with the same reference symbols in all figures.

An embodiment of a heat storage device, which in 1 shown schematically and there with 100 is a storage device 102 , The storage device 102 has, for example, a plurality of storage elements 104 which are spatially separated from one another in particular.

The storage device 102 includes a storage medium 106 for storing heat. This storage medium 106 is, for example, within the storage elements 104 arranged. The storage medium 106 is or comprises, for example, a phase change medium.

The storage medium 106 is used to store heat within the storage device 102 the heat storage device 100 , To the storage device 102 Supply heat or heat from the storage device 102 a heat transfer device can be seen 108 intended.

The heat transfer device 108 has a first flow device 110 and a second flow device 112 on. Through the first flow device 110 is a first heat transfer medium 114 flowable and through the second flow device 112 is a second heat transfer medium 116 can flow.

The first flow device 110 and the second flow device 112 are fluidly separated from each other. The first flow device 110 and the second flow device 112 have in particular completely separate flow paths.

The heat transfer device 108 in the embodiment shown comprises a plurality of heat transfer elements 118 , By means of the heat transfer elements 118 are the first flow device 110 and the second flow device 112 thermally with the storage device 102 connected. A respective heat transfer element 118 provides, for example, a thermal contact between the storage medium 106 of a respective storage element 104 on the one hand and the first flow device 110 and the second flow device 112 on the other hand.

At the in 1 The schematic representation shown is, for example, a heat transfer element 118 a storage element 104 assigned. In an advantageous embodiment of the heat storage device 100 are several additional heat transfer elements 118 a storage element 104 assigned. This is in 1 by the heat transfer element shown in dashed lines 118 indicated. In particular, there are several sections of the first flow device 110 and the second flow device 112 a storage element 104 assigned.

Any heat transfer element 118 is a section of the first flow device in the embodiment shown 110 and the second flow device 112 assigned. In this way, by means of the heat transfer element 118 the first heat transfer medium 114 and the second heat transfer medium 116 on the one hand and the storage medium 106 of the respective storage element 104 on the other hand thermally connected. The first heat transfer medium 114 , the second heat transfer medium 116 and the storage medium 106 are then above the respective heat transfer element 118 in thermal contact.

As an alternative to this, it is also possible in principle for thermal contact between the first flow device 110 and the storage medium 106 and the second flow device 112 and the storage medium 106 each via separate heat transfer elements 118 is made. In this case, the heat transfer element 118 no thermal contact between the first flow device 110 and the second flow device 112 ago.

The first flow device 110 and / or the second flow device 112 are each designed as a fluid circuit, for example. The respective fluid circuits of the first flow device 110 or the second flow device 112 are in particular completely separated from each other. For example, several sections of the respective fluid circuits of the first flow device run 110 or the second flow device 112 through the heat transfer elements 118 ,

The heat transfer device 108 further comprises at least one electric heating element 166 , In the present case there are a plurality of heating elements 166 intended. Any storage element 104 is preferably at least one electric heating element 166 assigned. In particular, any heat transfer element 118 a heating element 166 be assigned.

The heating elements 166 stand with an electrical power supply device 168 in electrical connection. By activating the energy supply device 168 can the heating elements 166 activated separately or together. In particular, there is the possibility of any heating element 166 optionally with electrical energy.

As a result, the heating element 166 Heat is given off.

The heating element 166 each heat transfer element 118 stands with the storage medium 106 of the respective storage element 104 in thermal connection. This gives the possibility of the heating element 166 Heat on the storage medium 106 to transfer and load it.

In addition, there is the heating element 166 with the first flow device 110 and the second flow device 112 in every heat transfer element 118 in thermal contact. This allows from the heating element 166 emitted heat to the first heat transfer medium 114 and / or the second heat transfer medium 116 transferred to load this (s).

The heating element 166 , see in particular 3 , is in a preferred embodiment of the heat storage device 100 trained longitudinally. For example, the heating element comprises or forms 166 a bar element 170 that is an axis 172 Are defined. The bar element 170 can be, in particular, a heating element which is designed in a straight line in sections.

The bar element 170 is axially into a plurality of segments 174 divided. The segments 174 are about the power supply facility 168 can be supplied with electrical energy independently or together. This offers the possibility of extending the bar element 170 to provide different temperatures, which can in particular be controlled and / or regulated.

In this way, thermal contact between the heating element 166 and a respective flow device 110 . 112 and / or the heating element 166 and the storage medium 106 can be varied depending on the position. For example, different heights in the storage medium 106 (perpendicular to the plane of the drawing in 1 ) brought to a temperature such that there is no mixing of the storage medium 106 he follows.

The heating elements 166 , the different heat transfer elements 118 are assigned, each separately from the energy supply device 168 can be controlled.

In 2 is a first embodiment of a heat transfer element 118 shown. The heat transfer element 118 has a receiving body 122 on which one an interior 124 surrounding wall 120 of the heat transfer element 118 forms.

The first flow device 110 and the second flow device 112 run through the interior 124 of the heat transfer element 118 , The interior 124 is mostly largely from the first flow device 110 , the second flow device 112 and the heating element 166 filled. The first flow device 110 , the second flow device 112 and the heating element 166 are for example by means of the receiving body 122 inside the interior 124 of the heat transfer element 118 fixed.

There is an interior area 176 provided in which the flow devices 110 . 112 and the heating element 166 are arranged together.

The first flow device 110 has, for example, a tubular element 126 on which in the interior 124 is positioned. This pipe element 126 surrounds and / or limits one of the first heat transfer medium in a fluid-tight manner 114 flowable flow area 128 ,

The second flow device 112 accordingly comprises a tubular element 130 which also has a flow area 132 limited fluid tight. This flow area 132 is from the second heat transfer medium 116 flow bar.

The pipe element 130 the second flow device 112 is adjacent to the tubular element 126 the first flow device 110 in the interior 124 of the heat transfer element 118 arranged.

The pipe elements 126 . 130 have, for example, an annular cross section. For example, they are designed as hollow cylinders.

The bar element 170 of the heating element 166 is also in the interior 124 positioned. The rod element is included 170 adjacent to the tubular element 126 and the pipe element 130 placed.

For example, the pipe elements are located 126 and 130 to each other. It is provided in particular that the tubular element 126 on the bar element 170 is applied. In addition, it is particularly provided that the tubular element 130 on the bar element 170 is applied. This creates a direct thermal and mechanical contact with regard to good heat transfer and a stable arrangement in the interior 124 between the pipe elements 126 . 130 and the bar element 170 ensured.

In addition, the pipe elements are located 126 . 130 and the bar element 170 preferably directly on the wall 120 on. This also ensures direct thermal and mechanical contact with regard to heat transfer with the heat transfer element 118 and a stable arrangement within the interior 124 ,

The pipe elements 126 . 128 and the bar element 170 are, seen in cross-section, positioned at the corners of a triangle, which in the present case is isosceles and approximately equilateral.

A space between the pipe elements 126 . 130 and the bar element 170 is for example with storage medium 106 filled which especially the pipe elements 126 . 130 contacted thermally and / or mechanically.

The storage medium 106 the storage device 102 surrounds the heat transfer element 118 , To produce an improved thermal contact between the heat transfer element 118 and the storage medium 106 is preferably a rib structure 136 provided which has a plurality of ribs 138 having.

Although the rib structure is only in 2 is shown, it goes without saying that on the heat transfer elements 4 to 7 also a rib structure 136 exists and is only hinted at there.

Ribs 138 the rib structure 136 are on one of the storage media 106 facing outside 140 of the heat transfer element 118 trained and / or positioned.

In particular, the ribs 138 in one piece with the wall 120 of the heat transfer element 118 connected. Ribs 138 are integral to the wall, for example 120 educated.

Ribs 138 the rib structure 136 are in the storage medium 106 the storage device 102 immersed. The storage medium 106 contacts the ribs 138 in particular materially and / or directly thermally. Ribs 138 are, for example, from the storage medium 106 flows around.

The wall 120 of the heat transfer element 118 is in particular from a plurality of separate wall parts 142 composed. At the in 2 The embodiment shown is the wall 120 for example by two different wall parts 142a . 142b educated.

Different wall parts 142 the wall 120 are in particular essentially designed as identical parts. The wall 120 can be made from the different wall parts in a technically particularly simple manner 142 produce.

Different wall parts 142 the wall 120 are via a tensioning device 144 connected with each other. The tensioning device 144 includes in particular a plurality of spring-elastic clamping elements 146 , by means of which mutually adjacent wall parts 142 are interconnected.

Adjacent wall parts 142 stand due to the tensioning device 144 for example in direct mechanical contact.

The wall parts 142 each have holding elements 148 on which the clamping elements 146 attack. The holding elements 148 are on adjacent wall parts 142 for example arranged opposite to each other. A clamping element 146 encompasses in particular two holding elements arranged opposite one another 148 ,

The holding element 148 includes, for example, a survey on the outside 140 the wall 120 is trained.

The clamping element 146 can for example on the holding element 148 attack and / or snap into place.

The the interior 124 surrounding wall 120 is, for example, along a parting plane 150 in two opposite wall parts 142a . 142b divided.

On the opposite wall parts 142a . 142b are holding elements in particular 148 formed in pairs, with a pair of holding elements 148 two holding elements each 148 includes. The respective holding elements 148 a pair are arranged opposite each other, with a holding element 148 of the pair on the wall part 142a is positioned and another holding element 148 of the pair on the wall part 142b is positioned. The two holding elements 148 of a pair are, for example, at least approximately mirror-symmetrical to the parting plane 150 positioned and / or trained.

A clamping element 146 encompasses in particular a pair of holding elements 148 , By means of the clamping element 146 thereby the holding elements 148 of the corresponding pair. Adjacent wall parts 142 can in this way by means of one or more clamping elements 146 are connected to one another by a tensile force and / or compressive force.

The pipe elements 126 . 130 and / or the bar element 170 are for example by means of the clamping device 144 between different wall parts 142 clamped.

At the in 2 The embodiment shown is the parting plane 150 a middle plane 152 of the heat transfer element 118 , The middle plane 152 here approximately forms a plane of symmetry with respect to which the wall parts 142a . 142b are symmetrical. Next is the bar element 170 approximately symmetrical to the tubular element 130 positioned.

The pipe element 126 has a longitudinal central axis 154 on and the tubular element 130 has a longitudinal central axis 156 on. The longitudinal central axes 154 . 156 are axes of symmetry of the tubular element 126 respectively. 130 ,

The longitudinal central axis 154 lies in the middle level 152 , The longitudinal central axis 156 is essentially symmetrical with respect to the axis 172 , which has a longitudinal central axis of the rod element 170 is, regarding the middle plane 152 positioned.

In the embodiment according to 2 are two clamping elements 146a . 146b provided by means of which the wall parts 142a . 142b are interconnected. The clamping elements 146a . 146b are at least approximately mirror-symmetrical to the central plane 152 arranged.

In principle, it is possible for several clamping elements 146 in one to the longitudinal central axes 154 . 156 parallel direction on corresponding pairs of holding elements 148 are arranged one after the other.

A radius R ₁ of the tubular element 126 is the same size as a radius, for example R ₂ of the tubular element 130 , The radius R ₁ corresponds to a shortest distance between the longitudinal axis 154 and a wall 158. of the tubular element 126 , The radius R ₂ is accordingly the shortest distance between the longitudinal axis 156 and a wall 160 of the tubular element 130 , It can be provided that the radii R ₁ and R ₂ are different from each other. For example R ₁ be larger than R ₂ or the other way around.

The wall 158. of the tubular element 126 has a wall thickness D ₁ on and the wall 160 of the tubular element 130 has a wall thickness D ₂ on. In the embodiment shown, the wall thickness corresponds D ₁ the wall thickness D ₂ , In principle, it is also possible that the walls 158. . 160 each have different wall thicknesses D ₁ and D ₂ exhibit.

A radius R ₃ of the heating element 166 is slightly larger than the radii in the present case R ₁ and R ₂ , but slightly less than the sum of the radii R ₁ and R ₂ with the respective wall thickness D ₁ respectively. D ₂ , It can be provided that the radius R ₃ is essentially as large as the sum of R ₁ and D ₁ or the sum of R ₂ and D ₂ (For example in the embodiment according to 6 ).

In the heat storage device 100 can in particular be provided that a plurality of receiving bodies 122 of the heat transfer element 118 is available. A respective pipe element 126 . 130 and a respective heating element 166 can accordingly have several receptacles 122 be assigned ( 4 ).

The receiving body 122 are in the direction of extension of the tubular elements 126 . 130 of the flow devices 110 . 112 and the bar element 170 positioned at a distance from each other. Between neighboring receptacles 122 is a space 178 intended.

The rib structures too 136 on adjacent receptacles 122 are separated from each other, the rib structures in 4 are only hinted at.

In other words, it can be provided that a receiving body divided into several segments along the direction of extension 122 is provided, with the rib structure 136 in the direction of extension of the tubular elements 126 . 130 and the bar element 170 is interrupted.

Through the several separate receiving bodies 122 and rib structures 136 (or the subdivision of the receiving body 122 and the rib structure 136 into individual segments) can, for example, cause a desired temperature stratification of the storage medium 106 can be maintained and is not reduced by the fact that due to the high thermal conductivity of the heat transfer element 118 Heat is transported axially to different positions.

One in 5 illustrated second embodiment of a heat transfer element 118 differs from that in 2 illustrated first embodiment in that in the interior 124 between the pipe elements 126 . 130 a heat sink 134 is provided.

The heat transfer element 118 comprises in particular a heat-conducting body 134 which, for example, between the tubular elements 126 . 130 and the bar element 170 is positioned.

The wall 120 is, for example, in one piece with the heat-conducting body 134 connected. The heat sink 134 is in particular an integral part of the through the receiving body 122 formed wall 120 of the heat transfer element 118 ,

The wall 120 with the heat sink 134 who have favourited Pipe Elements 126 . 130 and / or the bar element 170 are each made in particular from a material with high and preferably metallic thermal conductivity.

The receiving body 122 is especially together with the heat sink 134 and or due to the heat sink 134 complementary to the pipe elements 126 . 130 and / or the rod element 170 educated. Complementary training means that the receiving body 122 one to the respective pipe elements 126 . 130 and the bar element 170 has a corresponding cross-sectional shape. The pipe elements 126 . 130 and the bar element 170 are, for example, in the interior 124 of the heat transfer element 118 due to the full form fit with the receiving body 122 and / or large-area contact with the receiving body 122 fixed. This ensures high stability.

The pipe elements 126 . 130 and the bar element 170 are, for example, directly on the heat-conducting body 134 on. This creates a direct thermal and mechanical contact between the pipe elements 126 . 130 and the bar element 170 with the heat sink 134 of the heat transfer element 118 manufactured.

With the heat transfer element 118 according to 5 the arrangement of the pipe elements varies 126 . 130 and the bar element 170 in relation to the previous embodiment. The axis 172 lies in the parting plane 150 and middle level 152 , which is also a plane of symmetry of the heat transfer element 118 is. The pipe elements 126 . 130 are formed and positioned symmetrically to one another with respect to the plane of symmetry. The pipe elements 126 . 130 and the bar element 170 are arranged at imaginary corners of an isosceles and approximately equilateral triangle, similar to a Wankel shape.

The wall parts 142a . 142b are approximately C-shaped and symmetrical to each other with respect to the plane of symmetry. The wall parts 142a . 142b can be identical parts if they are arranged in opposite directions and connected to each other.

Incidentally, the in 5 illustrated second embodiment in terms of structure and function with the in 2 illustrated first embodiment, so that reference is made to the above description in this regard.

One in 6 illustrated third embodiment of a heat transfer element 118 defines an axis of symmetry 180 , With the axis of symmetry 180 it is a three-fold axis of symmetry in the present case, based on the positioning and design of the wall parts 142 , the positioning and the design of the heat sink 134 and the positioning and size of the pipe elements 126 . 130 and the bar element 170 ,

With the heat transfer element 118 are three wall parts 142a . 142b and 142c intended. The wall parts are essentially U-shaped and in the present case are designed as identical parts. In the connected state of the wall parts 142 it becomes a wall 120 formed, which is approximately triangular in cross section and in particular has the shape of an essentially equilateral triangle with rounded corners, similar to a Wankel shape.

On the rounded "corner areas" of the wall 120 , based on their cross-section, are the pipe elements 126 . 130 and the bar element 170 positioned.

A respective parting line 182a . 182b and 182c is provided between the wall parts 142a . 142b , between the wall parts 142b . 142c or between the wall parts 142c . 142a is positioned. The parting planes 182a . 182b . 182c each encompass the axis of symmetry 180 and intersect in this. The angle between the adjacent parting planes is essentially 120 °.

The heat sink 134 points radially outside, with respect to the axis of symmetry 180 , one engagement element each 184 on. A respective engagement element is present 184 in a parting plane 182a . 182b . 182c provided, so that in particular three engagement elements 184 available.

The engaging elements 184 are designed as projections between adjacent holding elements 148 of the wall parts 142a . 142b . 142c by means of a clamping element 146 are interconnected, intervene. In this way, intensive mechanical and thermal contact with regard to stable positioning of the components and good heat transfer is made possible.

The parting planes 182a . 182b . 182c are respective planes of symmetry with respect to the wall parts 142a . 142b . 142c , The parting line 182a is also a plane of symmetry for the tubular elements 126 . 130 , The parting line 182b is a plane of symmetry with respect to the tubular element 130 and the bar element 170 , The parting line 182c is a plane of symmetry with respect to the tubular element 126 and the bar element 170 ,

Incidentally, the in 6 illustrated third embodiment in terms of structure and function with the in 2 illustrated first embodiment, so that reference is made to the above description in this regard.

One in 7 Fourth embodiment of a heat transfer element shown 118 differs from the previous embodiments in that the interior 124 in three interior areas 176 is divided. The interior areas 176 lie side by side and are each of the wall 120 edged.

In a central interior area 176 is the bar element 170 arranged. In the interior areas 176 , each other regarding the bar element 170 are the first tube element 126 and the second pipe element 130 arranged. The pipe element 126 , the bar element 170 and the pipe element 130 are positioned equidistant from each other, the respective axes 154 . 156 and 172 define a common level, especially the middle level 152 ,

The middle plane 152 is also a plane of symmetry with respect to the tubular element 126 for yourself, the tubular element 130 for yourself and the bar element 170 for yourself. It is also a plane of symmetry with respect to two arcade-shaped wall parts 142a . 142b to each other and with respect to two wall parts 142c and 142d each for yourself. The wall parts 142c . 142d are essentially semicircular in cross section.

At a parting line 150 borders the wall part 142c to the wall parts 142a and 142b with which it each has corresponding holding elements 148 and clamping elements arranged thereon 146 connected is.

At another dividing level 150 borders the wall part 142d to the wall parts 142a and 142b with which it each has corresponding holding elements 148 and clamping elements arranged thereon 146 connected is.

Another middle level 186 is provided. The middle plane 186 is particularly perpendicular to the median plane 152 aligned and parallel to the parting planes 150 aligned. The middle plane 186 contains the axis 172 and is a plane of symmetry with respect to which the tubular elements 126 . 130 are positioned and formed symmetrically. Furthermore, the wall parts 142c and 142d positioned and formed symmetrically with respect to the plane of symmetry. The wall parts 142a and 142b are each designed symmetrically with respect to the plane of symmetry.

In the fourth embodiment, there is no heat-conducting body 134 intended.

Incidentally, the in 7 fourth embodiment of the heat transfer element shown 118 in terms of structure and function with the in 2 illustrated embodiment, so that reference is made to the above description in this regard.

The heat storage device described above 100 works as follows:

For storing heat in the heat storage device 100 becomes the first flow device 110 from the first heat transfer medium 114 flows through. This first heat transfer medium 114 is, for example, a hot medium flow.

The hot medium flow gives by means of the heat transfer elements 118 the heat transfer device 108 Heat to the storage medium 106 the storage device 102 from. The storage medium 106 thereby absorbing heat from the hot medium flow. As a result, the hot medium flow is cooled and the storage medium 106 heated accordingly. In this way, heat is stored inside the storage medium 106 the heat storage device 100 saved.

To stored heat from the heat storage device 100 can be seen, for example, the second flow device 112 from the second heat transfer medium 116 flows through. The second heat transfer medium 116 is, for example, a cold medium flow.

The (warm) storage medium 106 gives over the heat transfer elements 118 the heat transfer device 108 Heat to the through the second flow device 112 led cold medium flow. This warms up the cold medium flow and the storage medium 106 the storage device 100 cooled accordingly. It can be stored in this way within the storage medium 106 stored heat from the storage device 102 dissipate.

In that the first flow device 110 and the second flow device 112 via the heat transfer element 118 preferably in thermal contact can be by means of the heat transfer element 118 Heat from the first heat transfer medium 114 to the second heat transfer medium 116 (or vice versa). For example, it can be through the second flow device 112 guided cold medium flow through a through the first flow device 110 heat the hot medium flow.

The first flow device 110 and the second flow device 112 For example, different heat transfer media can flow through at the same time. This enables simultaneous loading and unloading of the storage device 102 the heat storage device 100 ,

As already mentioned, there is a heat storage device 100 additionally the possibility of the heating element 166 to be charged with electrical energy.

This gives the possibility of heat from the heating element 166 to transfer to the first heat transfer medium and / or the second heat transfer medium. In addition, heat can be transferred directly or indirectly to the storage medium 106 be delivered.

An electrically induced loading of the heat transfer media and the storage medium 106 can be carried out at the same time as the flow-induced loading and also independently of this.

The heat storage device 100 is therefore extremely versatile. Through the individual segments 174 of the heating element 166 there is also in particular the possibility of heat to the storage medium at a defined position 106 and / or the flow devices 110 . 112 transferred to. For example, this allows a desired temperature profile to be stored in the storage medium 106 achieve.

LIST OF REFERENCE NUMBERS

100

Heat storage device

102

memory device

104

storage element

106

storage medium

108

Heat transfer device

110

first flow device

112

second flow device

114

first heat transfer medium

116

second heat transfer medium

118

Heat transfer element

120

wall

122

receiving body

124

inner space

126

tube element

128

flow region

130

tube element

132

flow region

134

thermal conductors

136

rib structure

138

rib

140

outside

142

wall part

142a, b, c, d

wall part

144

tensioning device

146a, b

clamping element

148

retaining element

150

parting plane

152

midplane

154

longitudinal axis

156

longitudinal axis

158

wall

160

wall

166

electric heating element

168

electrical power supply device

170

rod element

172

axis

174

segment

176

The indoor section

178

gap

180

axis of symmetry

182a, b, c

parting plane

184

engaging member

186

midplane

D ₁

wall thickness

D ₂

wall thickness

R ₁

radius

R ₂

radius

R ₃

radius

Claims (19)

Heat storage device (100), comprising a storage device (102) which has a storage medium (106) for storing heat, and a heat transfer device (108) through which the storage device (102) Heat can be supplied or heat can be removed therefrom, the heat transfer device (108) having a first flow device (110) and a second flow device (112), each of which is in thermal contact with the storage device (102) and / or with one another, whereby through the first flow device (110) is a first heat transfer medium (114) and a second heat transfer medium (116) is flowable through the second flow device (112) and the first flow device (110) is fluidly separated from the second flow device (112), the heat transfer device (108 ) comprises at least one electrical heating element (166) which can be subjected to selective electrical energy and which is in thermal contact with at least one of the flow devices (110, 112) and / or with the storage device (102), characterized in that the at least one heating element (166 ) in two or more independently of one another or segments (174) that can be acted upon together with electrical energy, in particular that the segments (174) are positioned in a row in an extension direction of the at least one heating element (166). Heat storage device (100) after Claim 1 , characterized in that the first flow device (110) and / or the second flow device (112) are / are each designed as a fluid circuit or each comprise / comprises a fluid circuit. Heat storage device (100) according to one of the Claims 1 or 2 , characterized in that the at least one heating element (166) is elongated, in particular that the at least one heating element (166) is aligned parallel to a tubular element (126, 130) of at least one flow device (110, 112). Heat storage device (100) according to one of the preceding claims, characterized in that the heat transfer device (108) comprises at least one heat transfer element (118), by means of which at least one flow device (110, 112) and / or the at least one heating element (166) on the one hand and the Storage medium (106) of the storage device (102) on the other hand are thermally connected. Heat storage device (100) after Claim 4 characterized in that the at least one heat transfer element (118) comprises or forms a receiving body (122) which forms a wall (120) of the at least one heat transfer element (118) surrounding an interior space (124), and that at least one flow device (110, 112) and / or the at least one heating element (166) run through the interior (124) of the at least one heat transfer element (118). Heat storage device (100) after Claim 5 , characterized in that a plurality of receptacle bodies (122) is provided or that the receptacle body (122) is divided into individual, spaced apart segments, which receptacle bodies (122) or which segments in an extension direction of the flow devices (110, 112) and / or the at least one heating element (166) are each positioned at a distance from one another. Heat storage device (100) after Claim 5 or 6 , characterized in that the flow devices (110, 112) and the at least one heating element (166) are arranged together in the interior (124) or in that the interior (124) comprises interior areas (176) separated from one another by the wall (120), wherein the at least one heating element (166) and at least one of the flow devices (110, 112) are arranged in different interior areas. Heat storage device (100) according to one of the Claims 5 to 7 , characterized in that the at least one heating element (166) and the flow devices (110, 112) are positioned symmetrically in the interior with respect to at least one plane of symmetry (150, 152, 186) or axis of symmetry (180). Heat storage device (100) according to one of the Claims 5 to 8th , characterized in that the at least one heating element (166) comprises or forms a rod element (170) which extends at least in sections in an interior (124) of the at least one heat transfer element (118), and in particular that the rod element (170) by means of the receiving body (122) is fixed in the interior (124) of the at least one heat transfer element (118). Heat storage device (100) according to one of the Claims 5 to 9 , characterized in that the first flow device (110) and / or the second flow device (112) each comprise a pipe element (126, 130) which extends at least in sections in an interior (124) of the at least one heat transfer element (118), and in particular that the respective tubular element (126, 130) of the first flow device (110) and / or the second flow device (112) is fixed in the interior (124) of the at least one heat transfer element (118) by means of the receiving body (122). Heat storage device (100) after Claim 9 or 10 , characterized in that the rod element (170) and / or at least one of the tube elements (126, 130) makes thermal and / or mechanical contact with the wall (120) of the at least one heat transfer element (118). Heat storage device (100) according to one of the Claims 4 to 11 , characterized in that the at least one heat transfer element (118) comprises a heat-conducting body (134) which thermally and / or mechanically contacts the at least one heating element (166) and / or at least one flow device (110, 112), and in particular that the heat-conducting body (134) thermally and / or mechanically contacts a wall (120) of the at least one heat transfer element (118). Heat storage device (100) after Claim 12 , characterized in that the heat-conducting body (134) comprises at least one engagement element (184) which engages with a wall (120) of the at least one heat transfer element (118). Heat storage device (100) according to one of the Claims 4 to 13 characterized in that a wall (120) of the at least one heat transfer element (118) is composed of a plurality of separate wall parts (142) and in particular that at least two wall parts (142) are essentially designed as identical parts. Heat storage device (100) after Claim 14 , characterized in that the wall parts (142) are connected to one another via a tensioning device (144), that the tensioning device (144) has at least one spring-elastic tensioning element (146) and that adjacent wall parts (142) via the at least one spring-elastic tensioning element (146 ) are connected. Heat storage device (100) according to one of the Claims 9 to 15 , characterized in that the rod element (170) and / or at least one of the tubular elements (126, 130) are clamped between the wall parts (142) of the at least one heat transfer element (118). Heat storage device (100) according to one of the preceding claims, characterized in that the heat transfer device (108) has a rib structure (136) which comprises a plurality of ribs (138), and in that the rib structure (136) into the storage medium (106) Storage device (102) is immersed, wherein ribs (138) of the rib structure (136) are preferably positioned on an outside (140) of a heat transfer element (118) of the heat transfer device (108) facing the storage medium (106). Method for storing or providing heat by means of a heat storage device (100), comprising a storage device (102), at least one electric heating element (166) and a heat transfer device (108), the method - The storage device (102) by means of a first heat transfer medium (114) of the heat transfer device (108) is supplied with heat or heat is removed therefrom; - The storage device (102) by means of a second heat transfer medium (116) of the heat transfer device (108) is supplied with heat or heat is removed therefrom; - The first heat transfer medium (114) and the second heat transfer medium (116) inside the heat transfer device (108) flow through fluidically separated flow devices (110, 112); - The at least one electrical heating element (166) is selectively subjected to electrical energy, the at least one heating element (166) being subdivided into two or more segments (174) which can be supplied with electrical energy independently or together, the segments (174) in particular are positioned in a row in an extension direction of the at least one heating element (166). Procedure according to Claim 18 , characterized in that heat is transferred from the first heat transfer medium (114) to the second heat transfer medium (116) or that heat is transferred from the second heat transfer medium (116) to the first heat transfer medium (114) or that heat from the at least one heating element ( 166) is transferred to at least one of the heat transfer media (114, 116).

Images