Buffer storage, heating system and method for the operation thereof

Abstract

A buffer storage tank (1) for a heating system (2) is described, comprising a tank (3) having at least two separate chambers (4, 5), characterized in that each of the chambers (4, 5) has several inlet connections (6, 7, 8, 9) and several outlet connections (10, 11, 12, 13, 14). A heating system (2) is further proposed, comprising at least a third heat consumer (16) and at least a second heat source (18) different from the first, further comprising at least a first heat consumer (19) and a second heat consumer (20), and comprising a heat transfer circuit (21) through which a heat transfer medium can circulate via the heat sources (17, 18) and heat consumers (16, 19, 20), and including such a buffer storage tank (1).

Description

[0001] The invention relates to a heating system, in particular for buildings, and a buffer storage tank for such a heating system. Furthermore, a method for operating the buffer storage tank or the heating system is also specified.

[0002] The invention relates in particular to the combination of multiple heating sources and multiple input / output buffers to ensure a stable bivalent or monovalent operating mode.

[0003] Heating systems with multiple heat sources, thus offering the potential to increase the share of renewable energy sources, are becoming increasingly important. Combining different heat sources such as gas boilers, solid fuel boilers, oil boilers, heat pumps, etc., presents a challenge in terms of hydraulic connection to efficiently adjust the bivalent or monovalent functionality of the heating system. Each heat source has different physical parameters (temperature, water mass flow, etc.) that are required for standard operation.

[0004] Heating systems with multiple connected heat sources place different demands on the hydraulic connections, because each heat source has different physical parameters during standard operation.

[0005] The object of the invention is therefore to at least alleviate the problems described with reference to the prior art. In particular, the object of the invention is to maintain a hydraulic connection between the various heat sources with the aim of ensuring continuous safety and comfort for the end user.

[0006] This object is achieved according to the features of claim 1. Advantageous further developments are specified in the dependent claims. It should be noted that the features specified in the claims can be combined with one another in any technologically expedient manner and can characterize further embodiments of the invention. The description, particularly in conjunction with the figures, explains the invention and also discloses additional embodiments of the invention.

[0007] To achieve this object, a buffer storage tank for a heating system contributes, comprising a tank which has at least two separate chambers, each of the chambers having a plurality of inlet connections and a plurality of outlet connections.

[0008] The buffer storage tank for a heating system can be used to add a fluid, store it temporarily, and then withdraw it again. The fluid in the buffer tank can be at a higher temperature than room temperature. The buffer tank has a reservoir that can hold the fluid. The reservoir can hold a fluid volume or quantity of 20 to 40 liters. The buffer tank is, in particular, a module in which a heat transfer medium, heated to varying degrees by various heat sources, can be (specifically) mixed. Furthermore, each sub-circuit is hydraulically decoupled.

[0009] The tank has at least two separate chambers so that the liquid can be divided between the two separate chambers and stored separately. The tank can be a single component that is configured in such a way that separation occurs within the limited tank volume by other components of the tank. For example, a partition wall can be provided that is made in one piece and / or attached to the tank wall. The separation can be liquid-tight so that a permanent separation of the chamber volumes is achieved. The separation can optionally also comprise at least one bypass opening with which a (predetermined) limited exchange flow can be adjusted or set. The bypass opening(s) is / are significantly smaller than the base area of ​​the chamber(s).the separation, in particular with an area share of less than 30% or even less than 15%, so that a permanent separation of the chamber volumes is achieved. The diameter or cross-section of the bypass opening(s) is in particular not smaller than the diameter or cross-section of an inlet connection arranged on the upper, first chamber. Each of the chambers has several inlet connections and several outlet connections. The liquid can be fed to one of the separated chambers via one of the inlet connections. The liquid can be discharged from one of the separated tanks via one of the outlet connections.

[0010] A buffer tank for a heating system is used to combine different heat sources and heat consumers within a heating system. A number of different devices within a heating system can be (hydraulically) connected via the buffer tank, without each device having to be directly connected to every other device. Different temperature and flow rate levels can also be combined or adjusted via the buffer tank. Different devices that can be combined in a heating system may require different temperatures and / or flow rates to ensure efficient and effective operation.In the buffer storage, which has separate chambers, different streams with different state and / or flow parameters can flow into and out of different chambers, so that no unwanted interactions occur between the different streams.

[0011] The separated chambers are designed so that the fluid can only be supplied via one or more of the inlet connections and discharged via one or more of the outlet connections. In particular, the chambers are designed to limit or even (largely) prevent heat from dissipating into the environment. The chambers can be thermally insulated. The chambers thus also serve to store the heat transported by the fluid.

[0012] The inlet and outlet connections of the chambers are designed so that a liquid can flow through them. Inlet and outlet connections can be designed identically. They acquire their function as an inlet connection or outlet connection in particular through a predetermined flow direction of the liquid flowing through them. The inlet and outlet connections are designed, for example, as nozzles or flanges that are attached or can be attached to the chambers. The inlet and outlet connections can have any outer and inner diameter. For use of the buffer tank in a heating system for a building, the flow-through diameter should be selected to enable a flow rate (for water) of up to 1200 l / h [liters per hour] or even up to 2400 l / h.At least one of the inlet and / or outlet connections can be attached to the tank via a screw connection, clamp connection, shrink tube connection, plug connection, and / or adhesive connection. The inlet and outlet connections can be attached to any circumferential surface of the chambers and / or their positioning can be adjusted for a specific application. The inlet and / or outlet connections can be (partially) closed, for example, with plugs if these are not (yet) required in a given application.

[0013] The tank can be designed with a plurality of tank modules, each forming a chamber. The tank can be constructed as an assembly of several tank modules, wherein the separate tank modules are joined together and / or fixed in position relative to one another. The tank modules can in particular be arranged stacked on top of one another. The tank can be designed such that a tank module comprising a chamber can be mounted on top of another and / or rests on it. The tank modules arranged one above the other in this way comprise the chambers, which are separated from one another so that the contents of one chamber cannot come into contact with the contents of another chamber. The tank modules can be of the same design, for example, have the same number of inlet connections and outlet connections, have (approximately) the same chamber volume and / or comprise similar sensors. The outer walls of the tank module can have thermal insulation.

[0014] The chambers can be arranged one above the other. When installed, the chambers are arranged geodetically one above the other. This results in a compact arrangement that saves space in a building. It may also be possible for a predetermined heat exchange to occur by separating the chambers, allowing a predetermined (rising / falling) temperature level to be set across the tank. However, with an (isolated) separation, a temperature jump can occur across the height of the tank. Furthermore, the separate chambers make it possible to specifically restrict intensive circulating flow within the tank.

[0015] According to a further aspect, a heating system is proposed which at least a first heat source and a second or further heat source different from the first heat source, at least one first heat consumer and a second or further heat consumer, a heat transfer circuit through which a heat transfer medium can circulate over the heat sources and heat consumers, and a buffer storage of the type proposed here includes.

[0016] The buffer storage tank is designed as part of the heating system and serves to connect the heat sources and heat consumers via the shared heat transfer circuit (hydraulic and / or heat-transporting). The various heat sources and heat consumers of the heating system may require heat transfer media with different temperatures for operation. By connecting the heat sources and heat consumers via a shared heat transfer circuit, it is advantageous to use the buffer storage tank to specifically divide and reunite the heat transfer medium, which can or should have different temperatures at different points in the heating system. Water is the preferred heat transfer medium in a heating system.

[0017] The buffer storage serves both to separate different temperature ranges of the heat transfer medium and to absorb and distribute the heat transfer medium. The different temperature requirements for the heat transfer medium from different heat sources and / or heat consumers can be distributed.

[0018] At least two different heat sources are provided. Heat sources are considered different in particular if they implement a different type of heat input into the heat transfer medium. This applies in particular if they use different thermal energies, e.g., from the combustion of fossil fuels, from solar energy, from residual heat (from other heating processes), from electricity, etc. The heat sources can also be different if they implement the same type of heat input but with different (fixed or set) intensities, for example, due to a correspondingly different thermal design. It is particularly possible that all connected heat sources are different from one another in this sense.

[0019] Furthermore, several heat consumers or heat consumer circuits or systems are provided. These can be designed in different types and / or similar ways (e.g., as radiators, surface heating systems, etc.), but possibly with (fixed or adjusted) different heat supply and / or output, for example, through a correspondingly adapted thermal design. The several heat consumers are not arranged in series, but in parallel sections or sub-circuits of the heat transfer circuit. Of course, several (first) heat consumers can also be provided in a (first) sub-circuit of the heat transfer circuit, several (second) heat consumers in a (second) sub-circuit of the heat transfer circuit, several (third) heat consumers in a (third) sub-circuit of the heat transfer circuit, etc. (each in series).

[0020] The heat transfer circuit is configured so that the heat transfer medium (water) can circulate through the heat sources and heat consumers. The heat transfer circuit can form several subcircuits that originate from the buffer tank and discharge there again, with one or more heat sources and / or a heat consumer (each) being assigned to a (specific) subcircuit. The heat transfer circuit can include at least one valve, at least one pump, etc., to achieve a predetermined flow of the heat transfer medium.

[0021] The heating system can comprise a first chamber with inlet connections from several heat sources and with outlet connections to several heat consumers. The first chamber is configured to receive and discharge a flow of the heat transfer medium having a high temperature level. The inlet connections are particularly designed to receive heat transfer media having temperatures in the range of 20 °C [degrees Celsius] to 80 °C. The outlet connections to the heat consumers are particularly designed to discharge the heat transfer medium at a temperature in the range of 40 °C to 60 °C.

[0022] The first chamber may (additionally) have a drain connection to a third heat consumer. The drain connection to this third heat consumer is designed to discharge the heat transfer medium at a temperature in the range of 35 °C [degrees Celsius] to 70 °C.

[0023] The heating system can be designed such that in a second chamber, inlet connections of several, in particular all, heat consumers and at least one outlet connection to at least one heat source are provided. The second chamber is configured to receive and discharge flows of the heat transfer medium that have a low temperature level. The inlet connections of the several heat consumers are designed to receive the heat transfer medium at a temperature in the range of 30 °C [degrees Celsius] to 40 °C. The at least one outlet connection to at least one heat source is provided to discharge the heat transfer medium at a temperature in the range of 15 °C to 60 °C.

[0024] A drain connection of the second chamber to one of the heat sources can optionally be used as an inlet connection for one of the heat consumers. For this purpose, the heat transfer circuit can comprise a partial circuit to which a heat source and a heat consumer are assigned, as well as means that can reverse the flow direction of the heat transfer medium in at least one section of the partial circuit. When used as an inlet connection for one of the heat consumers, the drain connection is designed to accommodate heat transfer medium whose temperatures range from 25 °C [degrees Celsius] to 60 °C.

[0025] The various heat sources of the heating system can be selected from the following groups: heat pump (e.g., one of the following types: air-water, air-air, brine-air, hybrid), gas heater (e.g., involving the combustion of fossil fuel gas, oil, wood, or hydrogen), electric heater (e.g., using ohmic resistance heating), solid fuel heating (e.g., wood, pellets), heat storage (e.g., photovoltaics, latent storage, etc.). The heat sources can transfer heat to the heat transfer medium. When entering one of the heat sources, the heat transfer medium has a lower temperature than when exiting.

[0026] The various heat consumers of the heating system are selected from the following groups: high-temperature radiators (e.g., radiators), low-temperature radiators (e.g., underfloor heating), and water boilers (e.g., for drinking or domestic water). Heat consumers can extract heat from the heat transfer medium and transfer it to its surroundings or another fluid. When entering one of the heat consumers, the heat transfer medium has a higher temperature than when leaving.

[0027] According to a further aspect, a method for operating a heating system is proposed, wherein a heat transfer medium with a higher temperature level is provided in the first chamber than in the second chamber.

[0028] The explanations regarding the buffer storage tank and / or the heating system can be used in their entirety to characterize the process, and vice versa. In particular, a heating system with a buffer storage tank described here can be configured to carry out the described process.

[0029] The first chamber and the second chamber are designed in particular to ensure that the heat transfer medium is guided through the buffer storage in such a way that the incoming and outgoing flows of the heat transfer medium in each chamber have as similar temperatures as possible. One advantageous embodiment of the method is that the heat transfer medium is first guided from the heat sources, which generate a high temperature level in the heat transfer medium, via an inlet to the (upper or) first chamber. The incoming flows of the heat transfer medium with a high temperature level collect in the first chamber. The flows with the heat transfer medium with a high temperature level flow out of the first chamber to the predetermined heat consumers. The outgoing flows can then release their high temperature level and flow (all) back into the second chamber via inlets.Flows containing the heat transfer medium at a low temperature level collect in the second chamber. From the second chamber, the flow flows containing the heat transfer medium at a low temperature level flow to the heat sources. In the heat sources, the heat transfer medium regains a high temperature level and can flow into the first chamber via the inlets.

[0030] A sensor can be arranged in the first chamber and / or the second chamber. The sensor can, in particular, measure the temperature and / or the flow velocity of the heat transfer medium in the region of the chamber(s).

[0031] A control unit can be provided in the heating system to control the method. The control unit can be assigned to one of the heat sources. The heating system can have means that cause the heat sources to carry out the method described here. Furthermore, a computer program can be provided that controls the heating system so that the method is carried out.

[0032] The problems mentioned above are solved by the new buffer storage module with multiple inputs and outputs. The provision of different heat sources via hydraulic connections on the input and output sides enables bivalence or monovalence (optional or as needed). In particular, various physical parameters of the standard operating mode (temperature, water, mass flow, etc.) can be specifically adjusted or maintained in each system circuit (input - input, input - output, output - output).

[0033] The invention and the technical environment are explained in more detail below with reference to a figure. The representations are schematic and not intended to illustrate proportions. The explanations given with reference to individual details of the figure are extractable and can be freely combined with facts from the above description, unless something else necessarily follows for a person skilled in the art or such a combination is explicitly excluded. It shows schematically: Fig. 1: a heating system in a first configuration, Fig. 2: a buffer tank with inlet and outlet connections, Fig. 3: a heating system in a second configuration, and Fig. 4: a heating system in a third configuration.

[0034] Fig. 1 shows a heating system 2 in a first configuration. The heating system 2 in the first configuration comprises a buffer tank 1, a first heat source 17, a second heat source 18, a first heat consumer 19, a second heat consumer 20, and a third heat consumer 16, with all components being hydraulically connected to one another via a heat transfer circuit 21.

[0035] The first heat source 17 is designed as a gas heater 27. The second heat source 18 is designed as a heat pump 28. The heating system 2 and its operation are adjusted and controlled by a control unit 23 (regulation and control device). The system's heating modes are controlled by a separate control unit 23 according to customer requirements. Temperature sensors are provided for system control. The output temperature of the first or second heat source 17, 18 is measured, and based on communication with the control unit 23, it is determined which heat source 17, 18 is operating appropriately.

[0036] The buffer storage 1 comprises a tank 3 having a first chamber 4 and a second chamber 5. The first chamber 4 and the second chamber 5 are separated from each other by a partition 29. The first chamber 4 and the second chamber 5 each have a sensor 24.

[0037] The heat transfer circuit 21 comprises several sub-circuits, the components of which are assigned as follows: (Heating) sub-circuit a) : drain connection first chamber 4, third heat consumer 16, drain connection second chamber 5, first heat source 17, inlet connection first chamber 4; (Heating) sub-circuit b) : inlet connection first chamber 4, second heat source 18, drain connection second chamber 5; (Consumption) sub-circuit c) : drain connection first chamber 4, first heat consumer 19, inlet connection second chamber 5; (Consumption) sub-circuit d) : drain connection first chamber 4, second heat consumer 20, inlet connection second chamber 5.

[0038] The third heat consumer 16 is designed as a storage tank 26 for drinking or service water. The third heat consumer 16 is connected via the heat transfer medium circuit 21 in a flow direction 25 in an inflow direction to the first chamber 4 and in an outflow direction to the first heat source 17, with a pump 22 connected in the heat transfer medium circuit 21 between the first chamber 4 and the third heat consumer 16. The first heat source 17 is connected via the heat transfer medium circuit 21 not only to the third heat consumer 16 in the inflow direction but also to the first chamber 4 in the outflow direction, with a further pump 22 connected in the heat transfer medium circuit 21 between the first chamber 4 and the first heat source 17.

[0039] The second heat source 18 is connected via the heat transfer circuit 21 in an outflow direction to the first chamber 4 and in an inflow direction to the second chamber 5. The first heat consumer 19 is connected via the heat transfer circuit 21 in an outflow direction to the second chamber 5 and in an inflow direction to the first chamber 4. The second heat consumer 20 is connected via the heat transfer circuit 21 in an outflow direction to the second chamber 5 and in an inflow direction to the first chamber 4.

[0040] In the first configuration, serial bivalent operation can be set up. From the lower second chamber 5 of the buffer tank 1, the heat pump 28, with its pump (not shown here, but integrated), draws in the return water, heats it, and directs it to the upper first chamber 4 of the buffer tank 1. From there, the water can pass through a bypass opening 31 in the partition 29 of the buffer tank 1 into the lower second chamber 5, where it is drawn in by the pump of the gas heater 27. The gas heater 27 heats the water and directs it to the upper first chamber 4 of the buffer tank. From there, the first heat consumer 19 and / or the second heat consumer 20 draws it in with its pump (not shown here), and then the heat transfer circuit 21 sends the return water to the lower second chamber 5 of the buffer tank 1 when a central heating demand is active.The heat pump 28 then extracts the return water from the lower second chamber 5. When hot water is required, the pump 22 of the storage tank 26 draws the heated water from the upper first chamber 4 of the buffer tank 1. After the check valve 30, the return water flows into the lower second chamber 5 of the buffer tank 1, where it is drawn in by the heat pump 28.

[0041] In the first configuration, parallel bivalent operation can be set up alternatively and / or staggered in time. Both the heat pump 28 and the gas heater 27 simultaneously draw the return flow from the lower second chamber 5 of the buffer tank 1 via separate or separate return lines. Both devices heat the water and each feed it through its assigned inlet connections 6, 7 into the upper first chamber 4 of the buffer storage tank 1. If, for example, there is a central heating requirement, the first heat consumer 19 and / or the second heat consumer 20 draw heating water from the upper first chamber 4 of the buffer storage tank 1 - either both heat consumers 19, 20 simultaneously (typically from the gas heater 27 to the first heat consumer 19 and from the heat pump 28 to the second heat consumer 20) or only one of the heat consumers 19, 20, with water being drawn from the partial circuit of the heat pump 28 and / or the gas heater 27.The wastewater from both sub-circuits always flows back into the lower second chamber 5 of the buffer tank 1. When hot water is required for drinking or domestic water, the heat pump 28 draws the return flow from the lower second chamber 5, and the gas heater 27 draws the return flow to the storage tank 26, each with its own return flow. Both devices heat the water and direct it through their respective inlet connections 6, 7 into the upper first chamber 4. From there, the pump 22 draws it into the storage tank 26. The return flow from the storage tank 26 splits downstream of the check valve 30 into a return flow to the gas heater 27 and / or a return flow to the lower second chamber 5 of the buffer tank 1, from which the heat pump 28 draws the water.

[0042] Fig. 2 shows a variant of a buffer storage tank 1, set up to enable specific inflows and outflows of heat transfer medium, in particular water. The buffer storage tank 1 has a tank 3 which is composed of two tank modules 15. A tank module 15 arranged geodetically at the top forms a first chamber 4 and a tank module 15 arranged geodetically below forms a second chamber 5. The first chamber 4 and the second chamber 5 form two closed volumes due to the separation 29, which are not (directly) connected to one another in terms of flow. The first chamber 4 has openings in the circumferential surface, which are designed, for example, as nozzles. The openings form a first inlet connection 6, a second inlet connection 7 as well as a first outlet connection 10, a second outlet connection 11 and a fifth outlet connection 14. The second chamber 5 has openings in the circumferential surface, which are designed, for example, as nozzles.The openings form a third inlet connection 8, a fourth inlet connection 9, as well as a third outlet connection 12 and a fourth outlet connection 13.

[0043] The buffer tank 1 consists of two chambers 4 and 5, with the hot supply water stored in the first chamber 4 and the return water stored in the second chamber 5. In the center of the tank 3, between the chambers 4 and 5, there is a partition wall or separation 29, which ensures the decoupling function. The different temperatures and flow rates are hydraulically decoupled (largely or at least temporarily), and the design of the buffer tank reduces the mixing of the flows depending on the application to reduce efficiency losses.

[0044] Fig. 3 shows a heating system 2 in a second configuration. This heating system 2 comprises a buffer tank 1, a single (second) heat source 18, a first heat consumer 19, a second heat consumer 20, and a third heat consumer 16, with all components connected to one another via a heat transfer circuit 21. The (second) heat source 18 is designed as a heat pump 28.

[0045] The buffer storage tank 1 comprises a first chamber 4 and a second chamber 5. In the second configuration, the third heat consumer 16 is connected via the heat transfer medium circuit 21 in an inflow direction via the fifth drain connection 14 to the first chamber 4 and in an outflow direction via the third drain connection 12 to the second chamber 5, with a pump 22 connected in the heat transfer medium circuit 21 between the first chamber 4 and the third heat consumer 16. The (second) heat source 18 is connected via the heat transfer medium circuit 21 in an outflow direction via the second inlet connection 7 to the first chamber 4 and in an inflow direction via the fourth drain connection 13 to the second chamber 5. The first heat consumer 19 is connected via the heat transfer medium circuit 21 in an outflow direction via the third inlet connection 8 to the second chamber 5 and in an inflow direction via the first drain connection 10 to the first chamber 4.The second heat consumer 20 is connected via the heat transfer medium circuit 21 in an outflow direction via the fourth inlet connection 9 to the second chamber 5 and in an inflow direction via the second outlet connection 11 to the first chamber 4.

[0046] In the second configuration, the operation of a monovalent heat pump 28 is provided. The heat pump 28, with its (internal) pump, draws the return water from the lower second chamber 5 of the buffer tank 1, heats it, and directs it to the upper first chamber 4 of the buffer tank 1. From there, either the first heat consumer 19 and / or the second heat consumer 20 draws it in when central heating is required and sends the return flow to the lower second chamber 5, or the pump 22 of the tank 26 draws it in from the upper first chamber 4 when hot water is required. The water flows from the domestic hot water tank 26 via a check valve 30 back into the lower second chamber 5, where it is again drawn in by the heat pump 28.

[0047] Fig. 4shows a heating system 2 in a third configuration. This heating system 2 comprises a buffer storage tank 1, a first heat source 17, a first heat consumer 19, a second heat consumer 20 and a third heat consumer 16, wherein all components are connected via a heat transfer medium circuit 21. The first heat source 17 is designed as a gas heater 27. In the third configuration, the third heat consumer 16 is connected via the heat transfer medium circuit 21 in a flow direction 25, in an inflow direction via the fifth drain connection 14 to the first chamber 4 and in an outflow direction to the first heat source 17, wherein a pump 22 is connected in the heat transfer medium circuit 21 between the first chamber 4 and the first heat source 17.The first heat source 17 is connected via the heat transfer medium circuit 21 not only to the third heat consumer 16 in the inflow direction but also via the first inlet connection 6 to the first chamber 4 in the outflow direction, with a pump 22 being connected in the heat transfer medium circuit 21 between the first chamber 4 and the first heat source 17. The first heat consumer 19 is connected via the heat transfer medium circuit 21 in an outflow direction via the third inlet connection 8 to the second chamber 5 and in an inflow direction via the first outlet connection 10 to the first chamber 4. The second heat consumer 20 is connected via the heat transfer medium circuit 21 in an outflow direction via the fourth inlet connection 9 to the second chamber 5 and in an inflow direction via the second outlet connection 11 to the first chamber 4.

[0048] The third configuration provides for the operation of a monovalent gas heater 27. The gas heater 27 draws in the return water from the lower second chamber 5, heats it, and directs it to the upper first chamber 4. From there, either the first heat consumer 19 and / or the second heat consumer 20, when central heating is required, draws it in and sends the return flow to the lower second chamber 5. When hot water is actively required, the gas heater 27 uses its pump to draw in the water directly from the storage tank 26 behind the check valve 30, heats it, and directs it to the upper first chamber 4 of the buffer tank 1, from which it is pumped into the storage tank 26 by the pump 22. This means that the return flow from the storage tank 26 occurs directly and does not go back into the buffer tank 1, which speeds up heating. List of reference symbols

[0049] 1Buffer tank 2Heating system 3Tank 4First chamber 5Second chamber 6First inlet connection 7Second inlet connection 8Third inlet connection 9Fourth inlet connection 10First drain connection 11Second drain connection 12Third drain connection 13Fourth drain connection 14Fifth drain connection 15Tank module 16Third heat consumer 17First heat source 18Second heat source 19First heat consumer 20Second heat consumer 21Heat transfer circuit 22Pump 23Control unit 24Sensor 25Flow direction 26Storage tank 27Gas heater 28Heat pump 29Separator 30Check valve 31Bypass opening

Claims

1. Buffer storage tank (1) for a heating system (2), comprising a tank (3) which has at least two separate chambers (4, 5), characterized in that each of the chambers (4, 5) has a plurality of inlet connections (6, 7, 8, 9) and a plurality of outlet connections (10, 11, 12, 13, 14).

2. Buffer storage (1) according to claim 1, characterized in that the tank (3) is designed with tank modules (15), each forming a chamber (4, 5).

3. Buffer storage (1) according to claim 1 or 2, characterized in that the chambers (4, 5) are arranged one above the other.

4. Heating system (2), comprising at least a third heat consumer (16) and at least one second heat source (18) different from the first, further comprising at least one first heat consumer (19) and a second heat consumer (20), and comprising a heat transfer circuit (21) with which a heat transfer medium can circulate via the heat sources (17, 18) and heat consumers (16, 19, 20), characterized in thata buffer memory (1) according to one of the preceding claims 1 to 3 is provided.

5. Heating system (2) according to claim 4, characterized in that in a first chamber (4) inlet connections (6, 7) of several heat sources (17, 18) and outlet connections (10, 11) to several heat consumers (16, 19, 20) are provided.

6. Heating system (2) according to claim 5, characterized in that in the first chamber (4) a drain connection (14) to one of the heat sources (17, 18) is provided.

7. Heating system (2) according to one of claims 4 to 6, characterized in that in a second chamber (5) inlet connections (8, 9) of several heat consumers (16, 19, 20) and at least one outlet connection (12, 13) to at least one heat source (17, 18) are provided.

8. Heating system (2) according to claim 7, characterized in thatin the second chamber (5) a drain connection (12) to one of the heat sources (17, 18) can optionally be used as an inlet connection of a further heat consumer (16, 19, 20).

9. Heating system (2) according to one of claims 4 to 8, characterized in that the different heat sources (17, 18) are selected from the following group: heat pump, gas heater, electric heater, solid fuel heater, heat storage.

10. Heating system (2) according to one of claims 4 to 9, characterized in that the heat consumers (16, 19, 20) are selected from the following group: high-temperature radiators, low-temperature radiators, water boilers.

11. Method for operating a heating system (2) according to one of claims 4 to 10, characterized in that in the first chamber (4) heat transfer medium is provided with a higher temperature level than in the second chamber (5).

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