WO2009049847A1

WO2009049847A1 - Latent heat store

Info

Publication number: WO2009049847A1
Application number: PCT/EP2008/008646
Authority: WO
Inventors: Christof Lagaly
Original assignee: Rev Renewable Energy Ventures
Priority date: 2007-10-15
Filing date: 2008-10-13
Publication date: 2009-04-23
Also published as: DE102007049385A1

Abstract

The invention relates to a latent heat store (201) with a tank (110), which is at least partly filled with a storage medium (120) and a heat transfer medium (130), which is conducted in a first circulating circuit, which comprises a heat transfer medium line (150), arranged in the region of the storage medium and having at least one inlet opening (154) and at least a first outlet opening that allows the throughflow of the storage medium with the heat transfer medium, wherein the heat transfer medium line, arranged in the region of the storage medium, comprises at least a second outlet opening (153) and is part of a second, additionally connectable circulating circuit for the heat transfer medium and/or wherein the latent heat store comprises a heating device (144), assigned to the first outlet opening, for heating up the first outlet opening.

Description

Latent heat storage

The invention relates to a latent heat storage with a container which is filled at least in part with a storage medium and a heat transfer medium, which is guided in a circulation, which arranged in the storage medium heat transport medium line with at least one inlet opening and at least one of the flow Storage medium with the heat transport medium serving outlet opening comprises.

A latent heat storage utilizes the enthalpy of reversible thermodynamic state changes of the storage medium, such as e.g. the phase transition solid (melt-solidify), or reversible chemical reactions, such. chemisorption-based absorption and desorption processes. The utilization of the phase transition solid-liquid is the most frequently used principle. When charging a latent heat storage mostly salts or paraffins are melted as a storage medium, which absorb heat energy, namely heat of fusion. Since the process of melting is reversible, the storage medium releases the heat energy absorbed during solidification. Such latent heat storage are suitable, for example, to store alternating or not permanently accumulating heat energy over a longer period and are described for example in DE 30 07 275 A1. EP 1 598 406 A1 discloses latent heat storage materials.

The invention has for its object to provide a latent heat accumulator of the type mentioned, which ensures a relatively fast melting of a solidified storage medium with a simple structure. The aforementioned object is achieved by a latent heat accumulator with a container which is at least partially filled with a storage medium and a heat transport medium, which is guided in a first recirculation, which arranged in the storage medium heat transport medium line with at least one inlet opening and at least one the flow through the storage medium with the heat transfer medium serving first outlet opening, wherein the arranged in the storage medium heat transport medium line comprises at least a second outlet opening and part of a switchable second Umwälzkreislaufs for the heat transport medium and / or wherein the latent heat storage one of the first outlet opening associated heating device for Heating the first outlet comprises. In this way, a particularly fast and efficient melting of the storage medium is achieved by simple means.

In an advantageous embodiment of the invention arranged in the region of the storage medium heat transport medium line is at least partially disposed in the vicinity of the bottom of the container. In a further advantageous embodiment of the invention, the first outlet opening is arranged in the vicinity of the bottom of the container.

In a further advantageous embodiment of the invention, the first outlet opening is formed as a bore.

As a particularly suitable storage medium, salt, for example sodium acetate trihydrate, or a wax-like material, for example paraffin, has been found. These materials are safe and can be handled without problems. When using a salt as a storage medium, oil has proven to be an ideal heat transport medium in view of the very low solubility of molten salt. The oil can therefore come into direct contact with the molten storage medium. In addition, oil has the advantage that it builds up only a very low vapor pressure when heated and even at higher temperatures (eg above 100 ° C) without special safety measures, such as special pressure vessels with safety valves, are used. In a further advantageous embodiment of the invention, the first circulation circuit comprises an intake for sucking heat transfer medium from the container. In a further advantageous embodiment of the invention, the first circulation circuit comprises a guided from the intake manifold to the inlet heat transport medium line.

In a further advantageous embodiment of the invention, the second circulation circuit comprises a guided from the second outlet opening to the inlet opening and / or to an outlet in the container heat transport medium line.

In a further advantageous embodiment of the invention, the heating device comprises a second or further circulation circuit for the heat transport medium, which comprises a heat transport medium line arranged in the region of the first outlet opening. Alternatively or additionally, the heating device may comprise an additional heater or an electric heater. In this case, a heating resistor may be provided in the region or in the vicinity of the first outlet opening.

It can be provided a regulator, by means of which the second and / or further circulation circuit can be switched in response to a pressure in the first recirculation cycle.

In a further advantageous embodiment of the invention, a heat exchanger is provided for supplying heat to and / or for removing heat from a heat transport medium flowing in the heat transport medium line guided from the intake pipe to the inlet opening. In a further advantageous embodiment of the invention, a heat exchanger is provided for supplying heat to and / or for removing heat from a heat transport medium flowing in the heat transport medium line guided from the second outlet opening to the inlet opening. In a further advantageous embodiment of the invention, a heat exchanger is provided for supplying heat to and / or for removing heat from a heat transport medium flowing in a heat transport medium line of the second or further circulation circuit. In a further advantageous embodiment of the invention, a heater is provided for heating a flowing in the guided from the intake manifold to the inlet heat transfer medium conduit heat transport medium. In a further advantageous embodiment of the invention, a heater is provided for heating a heat transport medium flowing in the heat transport medium line guided from the second outlet opening to the inlet opening. In a further advantageous embodiment of the invention, a heater is provided for heating a heat transport medium flowing in a heat transport medium line of the second or further circulation circuit.

In a further advantageous embodiment of the invention, arranged in the region of the storage medium heat transport medium line is at least partially designed as a coaxial tube. A coaxial tube comprises in particular an inner tube and an outer tube. According to a development, the coaxial tube is meandering or spirally guided over the bottom of the container. In an alternative or additional embodiment, a plurality of coaxial tubes are arranged in parallel within the storage medium. For larger latent heat storage so that a homogeneous loading or unloading can be achieved with heat energy.

In a further advantageous embodiment of the invention, the latent heat storage on, in particular in the region of the first outlet opening provided, ultrasonic source. Possible embodiments of such an ultrasound source can be, for example, "Effect of Ultrasonic irradiation on nucleation phenomena in a Na ₂ HPO ₄ 12H ₂ O. Melting as a heat storage material", Etsuko Miyasaka, Masakazu Takai, Hideto Hidaka, Yoshihide Kakimoto, Izumi Hirasawa, Ultrasonics Sonochemistry 13 (2006) 308-312 and "Sonocrystallization: The Use of Ultrasound for Improved Industrial Crystallization", Graham Ruecroft, David Hipkiss, Tuan Ly, Neil Maxted, Peter W. Cainst, Organic Process Research & Development 2005, 9, 923- 932, are taken.

In a further advantageous embodiment of the invention, at least one pump is provided to implement a circulation circuit. It can be provided that a separate pump is provided for each circulation circuit. It can However, it can also advantageously be provided that only a single pump is provided for the first circulation circuit and the second circulation circuit, for the first circulation circuit and the further circulation circuit and / or for the first circulation circuit, the second circulation circuit and the further circulation circuit. For this purpose, the circulation circuits are nested together accordingly.

The latent heat storage is used in particular for the storage of heat energy from a cooled solar energy system for generating electrical voltage. This can be stored very effectively thermal energy without delay from solar panels and delivered to service water systems or radiators for space heating. Of course, the use of latent heat storage is not limited to photovoltaic systems. Rather, a use in connection with thermal solar systems or other facilities, such. As cooling industrial plants, carried out, which should be withdrawn to heat.

The aforementioned object is also achieved by a latent heat accumulator with a container for receiving a storage medium and a heat transport medium, which is guided in a recirculation circuit comprising a pump and a arranged in the region of the storage medium pipe with a flow and a return to flow through the heat transport medium, wherein at least one arranged in the region of a bottom of the container pipe section, which connects the flow to the return, is designed as a double-walled coaxial tube.

Because of these measures, the heat transport medium is pumped through the pipe section surrounded by the storage medium, whereby a solidified storage medium is heated relatively quickly and thus liquefied. The heat exchange cycle can therefore be taken after solidification of the storage medium with high efficiency in operation and it is compared to a supplementary heating a high level of energy saved because compared to the heating power only a relatively low pumping power must be expended. The coaxial tube ensures in each case, so even with a solidified storage medium, a flow of the heat transfer medium, which to the inner tube heated adjacent storage medium. By arranging the coaxial tube near the bottom of the container, a dead volume in the container with unmelted storage medium is prevented and the entire container with the storage medium is flowed through by the heat transport medium, starting at the bottom of the container.

In an embodiment, the flow is formed at least in the region of the storage medium as a double-walled coaxial tube. Thus, the flow of the heat transfer medium for heating the adjacent to the inner tube storage medium is also made possible by the inner tube of the coaxial tube of the flow.

In order to ensure that the storage medium flows through the heat transfer medium, the coaxial tube in the region of the bottom comprises an inner tube and an outer tube provided with radial openings. Conveniently, the openings of the outer tube are formed as bores and thus inexpensive to produce and arranged in their number and orientation for an optimal outlet of the heat exchanger medium. Preferably, the openings in the outer tube are arranged opposite the bottom of the container. In the directed down to the bottom openings occurs relatively little storage medium, since the pressure is lower than on the upwardly directed side of the outer tube.

Preferably, depending on the state of matter of the surrounding storage medium, substantially flows through the inner tube or the outer tube of the coaxial tube with the heat transfer medium, wherein when flowing through the outer tube, the heat transport medium exits through the openings of the outer tube into the surrounding storage medium. If the storage medium is present in partially melted or liquid state, the heat transport medium is in contact with the storage medium, which absorbs heat energy directly or releases it to the heat transport medium. The storage medium is in the solid state, although a direct flow through the storage medium with the heat transport medium due to a blockage of the openings in the outer tube or the annular gap between the inner tube and the outer tube is prevented, but since a flow through the inner tube is not hindered by can However, still a certain heat exchange can be achieved, so that as a result of heat conduction to the outer tube, a melting of the storage medium first in the annular gap and closing in the immediate vicinity of the coaxial tube is made possible, whereby the heat exchange cycle, starting rapidly in the region of the lead quickly. Since the melting of the storage medium takes place to a greater extent in the region of the flow and the return in the contact zone of the heat transfer medium and the storage medium, can here on the outside of the coaxial tube of the flow or the return, shortly after the start of the melting process, the heat transfer medium into the storage medium penetrate, in order to accelerate the melting or enforce the storage medium with the heat transfer medium.

Conveniently, the flow through the inner tube or the outer tube by means of a regulator used in the recirculation, in particular pressure regulator, controllable. If, for example, the pressure in the outer tube increases because the solidification of the storage medium clogs the annular gap between the inner tube and the outer tube or the openings in the outer tube, the pressure regulator opens at least partially, as a result of which a circulation through the inner tube is released. If the pressure in the outer tube decreases again, since at least part of the heat transport medium again flows through the annular gap and the openings into the partially molten storage medium, the circulation is interrupted again due to the closing pressure regulator through the inner tube and the complete flow takes place through the annular gap. Thus, depending on the state of aggregation of the storage medium, an optimum for the heat exchange recirculation cycle. As an alternative to a pressure-dependent control, it is of course also possible, for example, for a temperature-controlled control to be carried out by the person skilled in the art.

In order to accelerate liquefaction of the storage medium solidified after a heat discharge, the inner tube and the outer tube of the coaxial tube are made of a good heat-conductive material, in particular copper.

In order to improve the heat conduction between the inner and outer tubes, the coaxial tube between inner tube and outer tube thermally conductive elements. This can be realized, for example, by webs of copper or a filling of copper wool. According to a development, the coaxial tube is meandering or spirally guided over the bottom of the container. In an alternative or additional embodiment, a plurality of coaxial tubes are arranged in parallel within the storage medium. For larger latent heat storage so that a homogeneous loading or unloading can be achieved with heat energy.

In a further embodiment, the circulation circuit in the flow on an end projecting into the heat transport medium intake manifold, which is connected to the pump to which a connected to the outer tube of the bottom coaxial pipe down pipe is connected, wherein the downpipe is coupled to the controller, of which a with the inner tube of the coaxial tube coupled short circuit line goes off, and the inner tube is connected to a leading to the heat transfer medium return. Conveniently, the outer tube of the coaxial tube is formed in the flow as directly connected to the pump down pipe and the inner tube as the regulator downstream short-circuit line.

As a particularly suitable storage medium, salt, e.g. Sodium acetate trihydrate, or a wax-like material, e.g. Paraffin, proven. These materials are safe and can be handled without problems.

When using a salt as a storage medium, oil has proven to be an ideal heat transport medium in view of the very low solubility of molten salt. The oil can therefore come into direct contact with the molten storage medium. In addition, oil has the advantage that it builds up only a very low vapor pressure when heated and can also be used at higher temperatures (for example above 100 ° C.) without special safety measures, such as special pressure vessels with safety valves.

According to a development, a heat exchanger coupled to a heat exchanger circuit is inserted into the storage medium. The heat exchanger circuit can be operated, for example, with water, while oil is used as the heat transfer medium in the container. The latent heat storage is used in particular for the storage of heat energy from a cooled solar energy system for generating electrical voltage. This can be stored very effectively thermal energy without delay from solar panels and delivered to service water systems or radiators for space heating. Of course, the use of latent heat storage is not limited to photovoltaic systems. Rather, a use in connection with thermal solar systems or other facilities, such. As cooling industrial plants, carried out, which should be withdrawn to heat.

Further advantages and details emerge from the following description of exemplary embodiments. Showing:

1 is a schematic representation of a latent heat accumulator according to the invention with a liquid storage medium,

2 shows the latent heat storage of FIG. 1 with the solidified storage medium,

3 shows the latent heat storage of FIG. 1 in the first alternative embodiment,

4 shows the latent heat storage of FIG. 1 in a further alternative embodiment,

5 shows another embodiment of a latent heat storage,

6 shows another embodiment of a latent heat storage,

Fig. 7 shows another embodiment of a latent heat storage and

8 shows a further exemplary embodiment of a latent heat store,

1 shows an exemplary embodiment of a latent heat accumulator 1. The latent heat accumulator 1 comprises a container 10 with a storage medium 20 in the form of a salt, namely sodium acetate trihydrate which, by supplying heat or dissipating heat, changes its state of aggregation from solid to liquid or from liquid to solid changes and stores or gives off heat energy due to this change in its state of aggregation. The storage medium 20 is covered in the container 10 with a heat transport medium 30 in the form of an oil such that the level 31 of the heat transfer medium 30 is significantly above the level 21 of the storage medium 20.

FIGS. 1, 2 and 4 show heat exchanger circuits, ie inlets and outlets for the heat transport medium 30, which are used to supply energy from a heating system, For example, a boiler and / or a Solarkallektoranlage, or for heat extraction, eg for loading a water heater, serve, not shown.

The latent heat accumulator 1 is provided with a recirculation circuit for the heat transport medium 30, which comprises a pump 42 in a feed 52 and according to FIGS. 1 to 3 designed as a coaxial tube 45 pipe section extending along a side wall 12 and a bottom 11 of the container 10 extends. The coaxial tube 45 has an inner tube 48 and an outer tube 46, which is provided in the region of the bottom 11 with openings 47. An upper end of the coaxial tube 45 of the feed 52 is located above the storage medium 20. The heat transport medium 30 is sucked by a projecting into the heat transport medium 30 intake 41, the free end is above the level 21 of the storage medium 20, sucked by the pump 42 and through a downpipe 40 is passed, which opens into the outer tube 46 surrounded by the storage medium 20.

In the operating mode according to FIG. 1, the storage medium 20 is at least partially charged with thermal energy and therefore liquefied or not solid. The heat transfer medium 30 flows through the downpipe 40 and the outer tube 46 and enters through the pointing in the direction of the bottom 1 1 of the container 10 openings 47 in the immediately adjacent to the bottom 11 arranged outer tube 46 into the storage medium 20 in which it is distributed and heat releasably rises to collect above the storage medium 20.

If the salt serving as the storage medium 20 has given off so much heat energy that it has solidified, the heat transport medium 30 can not escape through the openings 47 of the outer tube 96 either through the annular gap 51 between the outer tube 48 and the inner tube 48 of the coaxial tube 45, whereby the pressure in the Downpipe 40 increases and the same further solidified due to the decreasing entry of heat into the storage medium 20.

In order to convert the solid storage medium 20 back into the liquid state in which it can store heat, as shown in FIG. Branch 93 from, in which a designed as a pressure regulator 44 is used, which opens from a certain pressure in the downpipe 40, after which the heat transfer medium 30 passes through a short-circuit line 50 in the inner tube 48 of the coaxial tube 45. The inner tube 48 is connected to a return 49 to direct the heat transfer medium 30 above the level 21 of the storage medium 20 in the container.

Due to this configuration, the heat transport medium 30 first flows through the inner tube 48 of the coaxial tube 45, so that by heat conduction, the storage medium 20 in the immediate vicinity, d. H. is melted in the annular gap 51 of the coaxial tube 45. Subsequently, the storage medium 20 is liquefied immediately around the outer tube 46 and at the same time passes the heat transport medium 30 both from above along the flow 52 and the return 49 and through the openings 47 in the vicinity of the bottom 11 in the storage medium 20. To a fast. To accomplish transition from the solid to the liquid state, the inner tube 98 and the outer tube 46 are made of a highly thermally conductive material. Particularly suitable are metal pipes, such as copper pipes, which are interconnected. The liquefaction of the storage medium 20 is accompanied by a pressure drop in the outer tube 46 and an associated closing of the passage through the pressure regulator 92. Subsequently, the heat transport medium 30 flows again predominantly through the outer tube 46 and its radial openings 47, whereby the loading of the storage medium 20 with heat energy is made possible with a high efficiency.

According to FIG. 3, a heat exchanger 61 coupled to a heat exchanger circuit 60 is inserted into the storage medium 20. The heat exchanger circuit 60 can be operated with water, for example, to carry out a process water heating. The heat transport medium 30 flowing through the storage medium 20 counteracts the formation of an insulating layer by solidifying storage medium 20 on the surface of the heat exchanger 61 upon removal of latent heat.

According to FIG. 4, the short-circuit line 50 is aligned parallel to the drop tube 40 and guided to the coaxial tube 45 arranged in the vicinity of the bottom 11. At To ensure a rapid melting of a solidified storage medium 20, the short-circuit line 50 is in thermal contact with the drop tube 40. The thermal connection can be realized by conductive connections or an immediately adjacent arrangement.

5 shows a further exemplary embodiment of a latent heat accumulator 101, which comprises a container 110 with a storage medium 120 in the form of a salt, namely sodium acetate trihydrate, which by heat supply or heat dissipation its state of matter from solid to liquid or from liquid to solid reversible changes and stores or gives off heat energy due to this change in its state of aggregation. The storage medium 120 is covered in the container 110 with a heat transport medium 130 in the form of an oil such that the level 131 of the heat transport medium 130 is significantly above the level 121 of the storage medium 120. The container 110 corresponds to the container 10, the storage medium 120 corresponds to the storage medium 20, and the heat transport medium 130 corresponds to the heat transport medium 30th

The latent heat storage 101 comprises a first circulation circuit and a second circulation circuit. The first recirculation circuit comprises an intake manifold 155, which is connected via a T-branch 141 with a pump 142. By means of the pump 142 155 heat transfer medium 130 is sucked via the intake manifold and pumped via an inlet opening 154 into a disposed in the region of the storage medium 120 heat transport medium line 150. The arranged in the storage medium 120 heat transport medium line 150 has a plurality of first outlet openings 151, which are designed as bores, and from which heat transport medium 130 and enters the storage medium 120. In this case, the heat transport medium 130 flows through the storage medium 120. If the heat transport medium 130 is cold, it absorbs heat from the storage medium 120, which crystallizes with increasing heat removal. On the other hand, if the heat transport medium 130 is warm, it gives off heat to the storage medium 120 and melts it.

To implement the second circulation circuit, the heat transport medium line 151 arranged in the region of the storage medium 120 is provided with a second outlet opening 153 is provided. In addition, the second circulating circuit comprises a heat transport medium line 156 connected to the second outlet opening 153 and guided to the inlet opening 154. By means of the T branching 141, it is possible to switch from the first circulating circuit to the second circulating circuit and vice versa.

The latent heat storage 101 also includes a heat exchanger 143, by means of which the heat transfer medium 130 through a heat source circuit 145 heat can be supplied and by means of which the heat transfer medium 130 through a heat sink circuit 146 heat can be withdrawn. Optionally, an additional heater 144 may be provided.

FIG. 6 shows a latent heat accumulator 201 which is modified relative to the latent heat accumulator 101. Here, the same reference numerals designate the same or similar elements as in FIG. The latent heat storage 201 also includes a first recirculation circuit and a second recirculation circuit. The first recirculation circuit includes an intake manifold 155 which is connected to a pump 142. By means of the pump 142 155 heat transfer medium 130 is sucked via the intake manifold and pumped via an inlet opening 154 into a disposed in the region of the storage medium 120 heat transport medium line 150. The arranged in the storage medium 120 heat transport medium line 150 has a plurality of first outlet openings 151, which are designed as bores, and from which heat transport medium 130 and enters the storage medium 120 and flows through this.

In order to implement the second circulating circuit, the heat transport medium line 150 arranged in the region of the storage medium 120 is again provided with its second outlet opening 153. The second circulation circuit further comprises a heat transport medium line 251 from the second outlet opening 153 to a closing mechanism 245, and a subsequent outlet 252 in the container 1 10 for introducing heat transfer medium 130 into the container 1 10. Together with the intake manifold 155 are all Lines and elements of the first recirculation circuit with the exception of the first outlet openings 151 part of the second recirculation circuit. The first circulation circuit and the second circulation circuit can be operated in parallel. The operation of the latent heat storage 201 takes place in an analogous manner as the operation of the latent heat storage ^¬ 101, wherein the second recirculation cycle can be interrupted by means of the closing mechanism 245.

FIG. 7 shows a latent heat accumulator 301 which is modified with respect to the latent heat accumulator 101. Here, the same reference numerals as in FIG. 5 designate identical or similar elements. The latent heat storage 301 also includes a first recirculation circuit and a second recirculation circuit. The first recirculation circuit comprises an intake manifold 155, which is connected via a T-branch 141 with a pump 142. By means of the pump 142 155 heat transfer medium 130 is sucked via the intake manifold and pumped via an inlet opening 354 in a arranged in the region of the storage medium 120 Wärmetransportmedium- line 350. The arranged in the storage medium 120 heat transport medium line 350 has a plurality of first outlet openings 351, which are designed as bores, and from which heat transport medium 130 and enters the storage medium 120 and flows through this.

To implement the second circulation circuit, the heat transport medium line 351 arranged in the region of the storage medium 120 is provided with a second outlet opening 353. In addition, the second circulation circuit comprises a heat transport medium line 356 connected to the second outlet opening 353 and partly guided within the heat transport medium line 351 to the inlet opening 154. By means of the T branching 141, it is possible to switch from the first circulation circuit to the second circulation circuit and vice versa , In this case, the operation of the latent heat accumulator 301 takes place in an analogous manner as the operation of the latent heat accumulator 101.

FIG. 8 shows a latent heat accumulator 401 which is modified relative to the latent heat accumulator 201. Here, the same reference numerals as in FIG. 5 and FIG. 7 designate identical or similar elements. The latent heat storage 401 also includes a first recirculation circuit and a second recirculation circuit. The first recirculation circuit includes an intake manifold 155 which is connected to a pump 142. By means of the pump 142, 155 via the intake manifold heat sucked transport medium 130 and pumped via an inlet opening 354 in a arranged in the region of the storage medium 120 heat transport medium line 350. The arranged in the storage medium 120 heat transport medium line 350 has a plurality of first outlet openings 351, which are designed as bores, and from which heat transport medium 130 and enters the storage medium 120 and flows through this.

In order to implement the second circulation circuit, in turn, the heat transport medium line 350 arranged in the region of the storage medium 120 is provided with its second outlet opening 353. The second recirculation circuit further includes a heat transport medium conduit 451, partly conducted in the heat transport medium conduit 350, from the second exhaust port 153 to a closure mechanism 245, and a subsequent outlet 252 into the vessel 110 for introducing heat transfer fluid 130 into the vessel 110. Together with the intake manifold 155, all lines and elements of the first recirculation circuit, with the exception of the first outlet openings 351, are part of the second recirculation circuit. The first recirculation circuit and the second recirculation circuit can be operated in parallel. The operation of the latent heat storage 401 takes place in an analogous manner as the operation of the latent heat storage 201.

Clogging the first outlet openings 151 and 351, the respective second recirculation circuit in the latent heat storage 101, 201, 301 and 401 is switched so that along the first outlet openings 151 and 351 warm heat transport medium 131 flows and so to a melting of the first outlet openings 151 and 351 leads. Subsequently, it is possible to switch over to the first circulation circuit.

Claims

P AT EN TA CLAIM

1. latent heat accumulator with a container which is at least partially filled with a storage medium and a heat transfer medium, which is guided in a first recirculation, the arranged in the storage medium heat transport medium line with at least one inlet opening and at least one of the flow of the storage medium comprising the heat transport medium arranged first outlet opening, characterized in that arranged in the region of the storage medium heat transport medium line comprises at least a second outlet opening and part of a switchable second Umwälzkreislaufs for the heat transport medium and / or that the latent heat storage one of the first outlet opening associated heating device for heating the first exit opening comprises.

2. Latent heat storage device according to claim 1, characterized in that the first recirculation circuit comprises an intake for sucking heat transfer medium from the container.

3. Latent heat store according to claim 2, characterized in that the first circulation circuit comprises a guided from the intake manifold to the inlet heat transport medium line.

4. Latent heat store according to claim 1, 2 or 3, characterized in that the second recirculation circuit comprises a guided from the second outlet opening to the inlet heat transport medium line.

5. Latent heat store according to claim 1, 2 or 3, characterized in that the second recirculation circuit comprises a guided from the second outlet opening to an outlet in the container heat transport medium line.

6. Latent heat store according to one of the preceding claims, characterized in that the heating device comprises a second or further circulation circuit for the heat transport medium, which comprises a arranged in the region of the first outlet opening heat transport medium line.

7. Latent heat store according to one of the preceding claims, characterized in that a heat exchanger for supplying heat to and / or for removing heat from a flowing in the guided from the intake manifold to the inlet heat transfer medium line heat transport medium is provided.

8. Latent heat store according to one of the preceding claims, characterized in that a heat exchanger for supplying heat to and / or for dissipating heat from one in the guided from the second outlet opening to the inlet Wärmettrittsmedium- heat transfer medium flowing medium is provided.

9. Latent heat store according to one of the preceding claims, characterized in that a heat exchanger for supplying heat to and / or for removing heat from a flowing in a heat transport medium line of the second or further circulation heat transfer medium is provided.

10. Latent heat store according to one of the preceding claims, characterized in that a heater is provided for heating a flowing in the guided from the intake manifold to the inlet heat transfer medium line heat transport medium.

1 1. Latent heat store according to one of the preceding claims, characterized in that a heater is provided for heating a flowing in the guided from the second outlet opening to the inlet heat transfer medium conduit heat transfer medium.

12. Latent heat store according to one of the preceding claims, characterized in that a heater is provided for heating a flowing in a heat transport medium line of the second or further circulation heat transfer medium.

13. Latent heat store according to one of the preceding claims, characterized in that arranged in the region of the storage medium heat transport medium line is at least partially configured as a coaxial tube.