Thermal storage system

FIELD: heating.

SUBSTANCE: invention relates to a thermal storage system. The thermal storage system includes at least one thermal reservoir and at least one thermal energy transfer device having the possibility of transferring thermal energy at least from time to time and at least from one first section of the thermal reservoir to at least one second section of the thermal reservoir. At least one of the above thermal energy transfer devices represents an active thermal energy transfer device. Thermal reservoir has an outlet hole with separation into two supply lines, one supply line of which is connected to a low-temperature part, and the other supply line is connected to high-temperature part of the active thermal energy transfer device. The invention also relates to a thermal reservoir energy distribution variation method, at which thermal energy is supplied at least from one first section of the thermal reservoir to at least one second section of the thermal reservoir.

EFFECT: improvement of energy distribution.

12 cl, 3 dwg

The invention relates to a thermal storage system containing at least one heat reservoir and at least one transfer device and the heat made with the possibility at least from time to time to transfer thermal energy from at least one of the first section of thermal reservoir to at least one second section of the heat reservoir.

Thermal storage system can be used to store thermal energy in a thermal reservoir. The accumulation of thermal energy in a thermal reservoir is well known. There are many reasons for accumulation of energy in thermal storage tank, including - if necessary to ensure reliable selection of thermal energy of a certain level or amount, in the General case, the accumulation of thermal energy is simpler and less energy-consuming solution.

One of the reasons for the use of thermal storage systems is the lack of permanent control of the production of thermal energy. For example, if the system is connected to such an unreliable source as, for example, solar collectors. In the presence of solar light such a source may apply thermal energy in the form of a heated fluid medium, but at night he cannot produce thermal energy. AK is omulyovaya thermal energy allows you to receive thermal energy and at night.

Another reason may be the need for the selection of large amounts of energy in a short time, which in General is not able to provide a supply of thermal energy. Thermal storage system allows you to obtain the required additional heat energy.

Another reason for using thermal storage system is simpler management and optimization if you want a permanent and reliable source of thermal energy.

Thermal storage systems use, for example, in heating systems of buildings and structures, where they can enjoy a hot liquid medium in radiators and other heating device for heating and hot tap water.

In the prior art it is well known the use of water storage tanks hot water to heat buildings and provide hot water. The water stratification occurs when cold and hot fluids form the layers acting as barriers to mixing due to density changes with temperature change. In the General case, it is preferable that the water tank was hot on top and cold at the bottom, which is the natural conductivity and/or natural circulation of water in the tank. This allows you to change t the m optimal distribution of heat in the tank. Also known various devices installed in the tank provides passive amplification of stratification in the tank. As such devices to enhance stratification can be used plates or sections, which serve as delimiters.

Thus, the object of the invention is to provide an improved thermal storage system.

In this regard, it is proposed to construct the above-mentioned thermal storage system so that at least one of these devices transfer heat was an active device to transfer thermal energy. The use of active devices of the transmission of thermal energy you can transfer energy from a portion of the heat reservoir, which has a lower energy level to parts with a higher energy level. According to the second law of thermodynamics, in this transfer of energy should be spent working. That is impossible passive transfer of energy from a lower level to a higher level. In the process of active transfer of heat energy required to do the work; in General this work, at least partially, will move in the form of thermal energy in a thermal reservoir. The transfer of heat energy from one part of the heat reservoir to the other provides in order to get one part with a relatively high energy level, and the other part - with a relatively low energy level. This may be appropriate if necessary, selection of thermal energy reservoir above a certain level, if the average power level of the tank does not exceed required. In this case, the energy extraction can be performed from a part with a higher level.

For example, if you want to take water with temperatures from -60 º C storage tank is filled with water with a temperature of only 40 º C, according to the prior art perform heating of the water in the storage tank to receive at least part of the storage tank temperature 60 ° C, followed by selection of water with a temperature of 60OC. In the claimed invention, instead only to add thermal energy provided by the transfer of heat from one part of the storage tank to another, resulting in heating of the one part and the cooling of the other part. When the temperature in the heated portion reaches 60 ° C, there is a possibility of selection of water with the desired temperature. Of course, what kind of tank it is impossible to get so much hot water, as from a system in which execute a simple heating system because, unlike the prior art, there is no adding to the system a significant amount of heat. Below the level of thermal energy footprint is t to understand the level of temperature, which in General case can be interpreted simply as the temperature.

When using thermal energy usually take into account the costs and the degree of environmental pollution associated with the production of thermal energy. In addition, it is important that heat had a certain level (for example that the temperature was high enough). In some cases, thermal energy can be obtained very cheaply (or free), or with very little pollution or no pollution), but the level of energy is not large enough. In this situation, the claimed invention can be very efficient from the energy point of view - due to the accumulation of energy in one part of the heat reservoir that will provide access to usable thermal energy. For example, there is the storage tank is heated by the solar collectors that produce free and not polluting energy, but on cloudy days required to heat water is not always possible. The use of the present invention will provide sufficient heating of the portion of the storage tank by cooling the other part of the storage tank, which subsequently heats the solar collectors. In General, this decision will provide the most cheap and not polluting the environment hot water.

Preferred is entrusted, to the first and second sections of the heat reservoir were installed at a distance from each other, preferably opposite each other. Mutual destruction of sections contributes to the stratification in the storage tank. Between these two sections can accommodate several additional sections, using them, at least partially, as the barriers between the first and second sections. As an example you can take the storage tank with water, in which there is a transfer of energy from the bottom to the top, followed by stratification of the specified tank.

In addition, thermal storage system may contain at least one additional source of thermal energy made with the possibility, at least from time to time, to add thermal energy in a thermal reservoir. Such a system can be used for heating of buildings or premises in a long time. For heating buildings need to have a source of thermal energy, because the system in which essentially no added heat, has a limit on the energy output and the energy consumption of the buildings or buildings for a long period of time is not in principle limited.

Preferably at least one of these additional sources of thermal energy to select from a group comprising GE is icollector, thermal solar collectors, a network of decentralized heat supply, fuel heaters, air heat pumps, heat pumps with heat recovery of groundwater, geothermal heat pumps, fuel cells and electric heaters. All of them are well-known sources of thermal energy, a very accessible and can provide a reliable supply of thermal energy. You can consider adding more than one source of thermal energy of another type, as this will reduce the probability of failure of the normal operation of the system. In addition, you can optimize the production of thermal energy from an economic point of view. For example, the presence and electric, and fuel heater will minimize the cost of heat energy if the price of electricity and fuel changes from time to time due to the use of the heater, which is more efficient in a specific period of time.

At least one of these active devices transfer heat energy may contain a component selected from the group comprising Peltier elements and heat pumps. Such components of various types and sizes are commercially available. The specific type of active devices transfer heat energy is predestinability use of the system.

Preferably, the heat reservoir contains the fluid, preferably a fluid environment containing water. The accumulation of thermal energy in a fluid environment is convenient from the point of view of simplicity as selection and power supply, respectively, the energy is easy to select from the heat reservoir and serve to heat the tank. Fluid, mainly consisting of water, has the advantage due to the fact that water has a number of thermodynamic properties, very useful from the point of view of accumulation of thermal energy. Water has very high specific heat capacity, available almost everywhere and is relatively safe in the event of leaks in the system.

In a preferred embodiment, the active device is the transfer of thermal energy includes first and second parts and is arranged to transfer thermal energy from the first part to the second part, the first part is made with the possibility of selection, at least from time to time, the fluid from the heat reservoir through the first feed line, and/or the second part is made with the possibility of selection, at least from time to time, the fluid from the heat reservoir through the second feed line. It should be understood that at least part of the first and second feed lines can form only one feed line in this case is the bottom of the feed line, at least on a certain site, contributes to the supply of fluid to the first and second part. By taking fluid from the heat reservoir active device to transfer thermal energy enables the transfer of thermal energy between one part of a selected fluid medium and the other part of the selected fluid. That is, heat energy from one part passed to another part. This way you can ensure optimal use of work performed by the active device of the transmission of thermal energy.

Preferably, optionally the first and/or second part were made with the possibility of filing a heat reservoir, at least from time to time, the fluid, the temperature of which differs from the average temperature level in the heating tank, preferably above and/or below the average temperature in thermal reservoir. This design thermal storage system allows you to minimize the work that must take active device to transfer thermal energy to a sufficiently high temperature section of the heat reservoir.

In addition, the invention relates to a heating system for supplying heat energy into the building, preferably containing the described thermal storage system. Embedding described heat is ccumulation system in the heating system will allow you to use the described advantages of such thermal storage system.

In addition, the invention relates to a method of changing the energy distribution of the heat reservoir, wherein thermal energy transfer from at least one of the first section of thermal reservoir to at least one second section of the heat reservoir. As already indicated, there are several reasons for accumulation of thermal energy in a thermal reservoir. The proposed method differs in that the heat transfer is carried out, at least in part and from time to time by the active device of the transmission of thermal energy. The use of active devices of the transmission of thermal energy you can transfer energy from a portion of the heat reservoir with a lower energy level to parts with a higher energy level.

Preferably, at least partially and at least from time to time, to transfer thermal energy was provided by the flow of fluid between at least one third section of the heat reservoir and at least one of the first sections and/or at least one of the second sections of the heat reservoir. The selection of fluid from the third section and the use of active devices transfer heat energy for heating and cooling the fluid, and at least a partial return of the fluid in the first and/or second section,allows active devices transfer heat energy in the economy mode, in which you can minimize the work performed by the specified device when the transfer of thermal energy.

Preferably, at least from time to time, essentially not add thermal energy in a thermal reservoir and/or to take away heat from the heat reservoir. Be aware that if the application works during active transmission of thermal energy at least part of this work will inevitably be converted into thermal energy.

Below is a detailed description of the invention based on the accompanying drawings, in which:

figure 1 - schematic representation of the first variant implementation of the storage tank system;

figure 2 - schematic representation of part of the second variant implementation of the storage tank system;

figure 3 - schematic representation of a variant of implementation of the heat pump.

For ease of explanation on all of the drawings shows the temperature values. It should be understood that the temperature values are given only as examples of possible temperatures and/or temperature ranges and in no way limit the requested amount of legal protection.

Figure 1 shows a first variant implementation of thermal storage system 1. Heat pump 3 shows schematically showing only the contour, nicotania the urn part 4 and the high temperature part 5. A more detailed description of the heat pump is given below with reference to figure 3. In short, the heat pump 3 is designed to transfer heat from the low temperature part 4 to the high-temperature part 5. Figure 1 also shows the storage tank 2 filled with fluid medium. Fluid may be a water or water with additives that prevent the growth of bacteria in water and/or corrosive effects of water on the system and/or otherwise prevent the change of the physical and chemical properties of water. Below, despite the possibility of any fluid with additives and without additives, for the description of fluid in the system used the term "water".

The storage tank 2 has good insulating properties, since the temperature of the water inside the storage tank 2 is likely to be higher than the ambient temperature. If not to heat the water in any way, despite the insulation, the temperature of the water inside the storage tank 2 will be gradually closer to the outside temperature.

The storage tank 2 is provided with outlet 10, which is located approximately in the middle. The water goes through the serving line, with subsequent separation of the two feed lines 6, 7, and the feed line 6 direct water to the inlet 12 of the high-temperature portion, and the feed line 7 - quotname hole 11 of the low-temperature part. Water which has passed through the high-temperature part 5, is heated and exits through the outlet 13 of the high-temperature part. Then the hot water return line 9 high temperature part serves to the upper opening 15 of the storage tank. The water cooled in the low temperature part 4, out through the outlet 14 of the low-temperature part and a return line 8 to the low side goes to the bottom opening 16 of the storage tank, through which it enters the storage tank.

When selecting from the storage tank 2 hot water for domestic needs in the General case, the temperature of tap water should not be less than 45 º C. Taking into account heat loss as the water flows from the storage tank 2 to the valve 17 preferably, the temperature of the water in the storage tank 2 was at least 50 º C (see also figure 2). Water can either directly go to the faucet 17 - in this case from the valve 17 opens the same water that collected in the storage tank 2, or through the heat exchanger 18, which is heated fresh water, which are then used as water 17 from the tap. This is shown in figure 2. As can be seen from figure 2, the water can be extracted from the upper part 15 of the storage tank 2. This is the usual method of selection of hot water from the storage tank 2.

For example, if the water temperature at the outlet of the storage tank 2 is equal to 40 º C, this temperature is not high enough is to use as water 17 from the tap. Thermal storage system 1 can be used for stratification of the storage tank 2 and the upper part of the water temperature 60 ° C, and at the bottom - water temperature of 20ºC. It is as follows: select the water in the middle of the storage tank 2, where the temperature will remain very close to 40 º C, divide the water and serves to both parts 4, 5 of the heat pump 3, in which one side 4 chilled, and the other side 5 is heated. Then hot water is fed back to the upper part 15 of the storage tank 2 and the cold water is fed back to the lower part 16 of the storage tank 2. If you continue to do for some time, in the storage tank 2 will happen stratification of water with the formation of a layer of water with a temperature of 60 ° C in the upper half and layer with a water temperature of 20 º C in the lower half of the storage tank 2. At this point, you can perform the selection of usable hot water from the upper part of the storage tank 2. In practice, from time to time will form a middle layer with an intermediate temperature of about 40ºC. Properties such as temperature and dimensions of the layers, change over time due to both natural circulation and external influences on the drive, such as selection and adding water or heating and cooling water in the storage tank 2. Changing the size and pace of the atmospheric temperature of the layers occurs, for example, when taking water from the storage tank 2.

This is possible due to the movement of heat from the upper to the lower part of the tank 2. Thus in the storage tank 2 is provided to store the entire thermal energy. Heat pump 3, a transfer of heat takes work to move heat from a low temperature part 4 to the high-temperature part 5. This mechanical work, at least partially used to heat water in the high temperature part 5, therefore it is (at least partially) into the storage tank 2 in the form of thermal energy.

Figure 2 shows a first variant implementation of the heating system 19 using thermal storage system 1. The heating system 19 is fed with hot water 26 from the district heating system, but as a source of hot water 26 you can use any source, for example: gas-oil burner, electric heater, solar collectors or heat pump.

Heating system supplies building 20 thermal energy in several ways.

First, the heating system 19 takes the heat for heating the inside of the building 20. For this purpose we use two different heating systems 21, 22 shown in the example of figure 2. In the first case, thermal energy is obtained radiators 21 (figure 2 showing the n only one sink). In the second case, the system 22 floor heating also receives thermal energy from the heating system 19. Radiators 21 and the system 22 of the floor heating can be in the same room. In General, however, some areas provide heating radiators 21 and the other system 22 floor heating.

Secondly, the heating system 19 provides thermal energy system 23 hot water. System 23 hot water supply to the hot water tap 17, used for various purposes, including for washing under the shower, in the bathroom, wash hands, work dishwashers and washing machines, or other needs. In the shown embodiment, the system 23 hot water contains a thermal storage system 1 and part 24 for fresh water. These two parts have thermal coupling through the heat exchanger 18. Although due to the heat exchanger 18 in the system of this type, there is some heat loss, the system has significant advantages from the point of view of hygiene. This is especially important when using hot water 17 from the tap to wash under the shower, for drinking, brushing teeth or similar use. Due to the presence of separate parts 24 for fresh water cold tap water 25 is heated in heat exchanger 18 and directly after heating it serves through the water the first valve 17. Possible direct use of water from the storage tank 2 as hot water 17 from the tap, but in this case it is necessary to take into account such hygienic problems as the presence of water sticks Legionella.

Heating system 2 is preferred when the water temperature is below the normal water temperature district heating system comprising at least 60'C. As an example, the selected water temperature is 40ºC. Due to this relatively low temperature in a straight line 26 is already impossible to direct water flow from the straight line 26 all functional components 17, 21 heating.

In the present example, the system 22 floor heating can still work with water coming directly from the straight line 26 with a temperature of 40ºC. Moreover, the temperature of -40 º C may even be overkill for the system 22 floor heating. Therefore, provided by air line 27 mixing of the fluid, providing air conditioning water flowing through the supply line 28 to the system 22 floor heating. Air line 27 to the mixing water by itself is well known in the art and works on the principle of mixing hot and cold water to obtain an acceptable level of temperature of the water entering through the supply line 28 to the system 22 floor heating, which provides a number of the valves 29, 30, 31, the temperature sensor 32 and pump 33. Thus in the example of figure 2, the hot water coming from a straight line 26 district heating, mix not only with water returning from the heating system 22 through a return line 34 (therefore having a lower temperature), but with water coming from a connecting line 35. In General, the temperature in the connecting line 35 is located between the (slightly above) the temperature in the direct line 26 network district heating and (slightly below) the temperature in the return line 22 heated floor. The location of the connection line 35 with the bypass line mixing of the water ensures that the average water temperature of the connecting line 35 has priority in relation to the water from the return line 34. This ensures that the water savings from a straight line 28 network district heating and temperature reduction in the return line 35. The connector 35 is connected to the low-temperature part 4 of the heat pump 3, a more detailed description of which is given below.

However, other functional elements of the heating system 19 should be supplied with a higher temperature level. These elements include, for example, standard radiators 21 and/or 23 in a hot water feed to the hot water faucet 17. The temperature is changing - particularly in cold weather the current weather requires a higher temperature radiators 21, but in a relatively warm days the water temperature in the radiator 21 may not exceed 40ºC. To ensure the effective operation of such systems the temperature level in the supply line 36 should generally be at least 50-55ºC. Otherwise, hot water 17 coming from the faucet 17, will be too cold.

This is the reason that known in the district heating systems must provide the level of water inlet temperature of about 60 ° C or higher. Another reason of the high temperature is that high temperatures reduce the risks associated with such biological contamination, such as bacteria (such as Legionella).

Use two different modes of operation of the heat pump 3: first, there is described the mode in which thermal energy in thermal storage system 1 is passed from the lower part of the storage tank 2 to the upper part of the storage tank 2, a more detailed explanation of which is given below. Secondly, apply and another mode in which the heat pump 3 uses water from the district heating network to heat the charging of the storage tank 2. In the depicted heating system 19 is not a problem of low water temperature in the straight line 26 is due to the installation of the heating system 1 heat pump 3. Heat pump 3 contains and connects isotemperatures part 4 and the high-temperature part 5 (see also figure 3). In the low-temperature part 4 of the heat pump 3 serves thermal energy coming from a straight line 28 network district heating (or, as already described, from the storage tank 2 through a feed line 7 low part). thermal energy heats the fluid is passed into the evaporator 37 cooling circuit 41 of the heat pump 3 (cf. figure 3). In the evaporator 37 heat pump 3 heat absorbed by the vapor cooler. The compressor 40 compresses the refrigerant and delivers to the condenser 38 to the cooling circuit 41. In the capacitor 38 of the heat pump 3 serving heat through the heat exchanger to the other faction water from the district network 26 heating in a straight line 28 (or, as already described, from the storage tank 2 through the feed line 6 high-temperature parts). It has a relatively low temperature of -40 º C increases to an acceptable level temperature from about 50-55ºC. This occurs in the high temperature part 5 of the heat pump 3.

From the high temperature part 5 of the heat pump 3 coolant through the throttle valve 39 serves in the evaporator 37. In the throttle valve 39 pressure drops, resulting in a drop in temperature of the refrigerant so that the refrigerant can absorb heat energy of water flowing through the low-temperature part 4. As the temperature of the water coming through the connector the St line 35 from the low-temperature part 4 lowered by operation of the heat pump 3, the water can be returned back to the bottom of the tank 2. Alternatively, you can perform the immediate return of water completely or partially in the opposite line 36 leading back to the district network teplosnabjenie, by opening valve 30 and closing of the valve 31, or to use it in the bypass line 27 mixing of the fluid system 22 floor heating.

The water coming out of the high-temperature part 5 of the heat pump 3 through the high-temperature return line 9, can be used to heat the upper part of the storage tank 2 storage tank system 1 and/or to supply heat such consuming heat of the components as a system of 23 hot water or radiators 21.

The radiator 21 can be powered and in a straight line 26, thus allowing the adjustment of the valves 42 and 43. Some radiators for most of the year can work at a temperature of 40ºC. Only in the winter time when the increase of the required amount of heat necessary to supply the radiators 21 water with a higher temperature.

It should be noted that the main consumer of heat heating system 19 is 22 floor heating. Functional elements requiring high temperature at the entrance (like system 23 hot water), typically use small hours of the Sabbath. ü the total heat load. This is because in General they are used only from time to time. So usually use a heat pump 3 with a relatively small heat transfer capability. In addition, when the heat pump 3 to transfer heat energy inside the heat storage system 1 and/or stratification of the storage tank 2, the heat pump 3 spends a relatively small amount of work. In the example of figure 2 the electrical power of the heat pump 3 is approximately equal to 70 watts. This corresponds to the heat transfer capability of about 0.5 kW. As can be seen from the above figures, as the compressor 28 can use a regular compressor for refrigeration devices. In case of exceeding the capacity of the heat pump 3 can be used, for example, additional heaters 44, 45, to compensate for the missing heat output.

It should be noted that the flow of high temperature water heated by the heat pump 3, the radiator 21 is energetically less favorable compared to the feed system 22 floor heating water with a lower temperature. However, in some cases it is not possible to refuse the use of heating radiators 21. For example, the reconstruction of the building it is impossible to install the system 22 floor heating in all rooms of the building.

Of course, what about iannou heating system 19 can be successfully applied and then when the temperature of the water coming from the district heating networks, so high that there is no need to use heat pump 3 for heating the water 26 district heating. In this case, the heat pump 3 can be turned off - in a sense will be provided direct transfer of thermal energy between the water coming from the district heating network in a straight line 26, and the tank 2 and/or heating radiators 21. Described herein heating system 19 can be used as a backup - for example, if the district heating system is running with low temperature due to the high cost of fuel, such as oil or gas. In this case, the heat pump 3 is only used for stratification of the storage tank 2.

The heating system 19 can be provided several additional heaters. In the example of figure 2 used electric heater 44 and solar collectors 45. Electric heater 44 is used only if all other systems are not able to provide sufficiently high temperature in the storage tank 2. Pictured solar collectors 45 is a solar heater of conventional type, in which the pump 48 pumps the fluid, containing water, the circuit 46 where it is heated by the solar collectors 45 and circulates in the area 47 heat the inside of the storage tank 2, heating up contained in the storage tank 2 water. Region 47 of the heat exchange can be performed in the form of copper pipe inside the tank 2. Solar collectors 45 provides a very low cost of heating water in the storage tank 2. The disadvantage of solar collectors 45 is the inability to obtain at any time the temperature is above the required value of 50'C. The advantage of solar collectors 45 is a very low cost heating. A situation may arise when the solar collectors 45 allow to heat water in the storage tank 2 only to a temperature which is below the acceptable for use. When this situation occurs, turn on the pump 49 and the sampling of water from the tank 2 via a supply line, separated from the supply line 6 and 7, respectively, the high-temperature part 5 and low-4 parts. The heat pump 3 operates in a mode in which the pump 3 heats the water from the storage tank 2, using the heat of the water in the storage tank 2. Hot water from the high temperature part 5 then returns to the top of the tank 2. Cold water from the low-temperature part 4 is returned to the bottom of the tank 2 by switching the three-way valve 50. This mode allows you to more fully utilise the advantages of very low cost water heating by solar collectors 45. P and energy, consumed during the transfer of heat from the lower portion 11 of the storage tank 2 in its upper part 15, significantly less energy is required for a simple heating tank 2, even if it heats only the upper part 15.

The reference list of items

1. Thermal storage system (1)containing at least one heat reservoir (2) and at least one transfer device and the heat made with the possibility at least from time to time to transfer thermal energy from at least one of the first section of the heat reservoir (2) to the at least one second section of the heat reservoir (2), characterized in that at least one of these devices transfer heat energy is an active device (3) transfer of thermal energy with a thermal reservoir (2) has an outlet (10) split into two feed lines (6), (7), of which one feed line (7) connected to the low-temperature part (4), and the other feed line (6) connected to the high temperature part (5) of the active device (3) transfer of thermal energy.

2. Heat accumulational system (1) according to claim 1, characterized in that the first section and the second section of the heat reservoir (2) is installed at a distance from each other, preferably opposite each other.

3. Thermal storage system (1) according to any one of claims 1 to 2, characterized in that it contains at least one additional source (26, 44, 45) of thermal energy, made possible at least from time to time to add thermal energy in a thermal reservoir (2).

4. Thermal storage system (1) according to claim 3, characterized in that at least one of these additional sources of thermal energy selected from the group comprising solar collectors (45), thermal solar collectors (45), network (26) decentralized heat supply, fuel heaters, air heat pumps, heat pumps with heat recovery of groundwater, geothermal heat pumps, fuel cells and electric heaters (44).

5. Thermal storage system (1) according to any one of claims 1 to 2, characterized in that at least one of these active devices (3) transfer of thermal energy contains a component selected from the group comprising Peltier elements and heat pumps (3).

6. Thermal storage system (1) according to claim 5, characterized in that the heat storage tank (2) contains the fluid, preferably a fluid environment containing water.</>

7. Thermal storage system (1) according to claim 5, characterized in that the active device (3) transfer of thermal energy contains the first part (4) and the second part (5) and configured to transfer thermal energy from the first part (4) to the second part of (5), and the first part (4) is made with the possibility of selection, at least from time to time, the fluid from the heat storage tank (2) on the first feed line (7) and/or the second part (5) made with the possibility of selection at as from time to time, the fluid from the heat storage tank (2) via the second feed line (6).

8. Thermal storage system (1) according to claim 7, characterized in that the first part (4) and/or the second part (5) made the filing in the heat storage tank (2), at least from time to time, the fluid, the temperature of which differs from the average temperature level in the heating tank (2), preferably above and/or below the average temperature in the heat storage tank (2).

9. Heating system (19) for supplying thermal energy to the building (20), characterized in that it contains thermal storage system (1) according to any one of claims 1 to 8.

10. How to change the energy distribution of the heat reservoir (2)providing for the transfer of thermal energy from at least one first section (15) of the heat storage tank (2) at least to the ne of the second section (14) of the heat reservoir (2), and characterized in that the transfer of heat energy, at least in part or from time to time, shall be implemented by the active device (3) transfer of thermal energy, and heat transmission is performed with the separation of the outlet (10) of the heat reservoir (2) into two feed lines (6), (7), of which one feed line (7) attached to the low-temperature part (4), and the other feed line (6) attached to the high temperature part (5) of the active device (3) transfer of thermal energy.

11. The method according to claim 10, characterized in that the transmission of thermal energy, at least in part or from time to time, carry out through the fluid flow of a liquid medium between at least one of the third section (10) of the heat reservoir (2) and at least one of the first sections (15) of the heat reservoir (2) and/or at least one of the second sections (16) of the heat reservoir (2).

12. The method according to any of PP-11, characterized in that at least from time to time in the heat storage tank (2) is essentially not add thermal energy and/or take away heat from the heat reservoir (2).