Water pump heating system, operating procedures and control

Abstract

In order to improve the utilization of energy available throughout the year for heat generation in or on buildings (54), the invention provides a heat pump heating system (50) for a building (54), comprising: a heat source device (52) with a heat source system (2) for providing environmental heat from the environment, a heat pump (1) for converting the environmental heat provided by the heat source device (52) into heating energy for the building (54), wherein the heat pump (1) has a refrigerant circuit (56) connected to the heat source device (52) with a first refrigerant line (58) which is connected to the heat source system (2) with a flow line (58.2) and a return line (58.2), and a heat distribution and storage system for distributing or storing heating energy, characterized in that that the heat source device, in addition to the heat source system (2), has an additional heat accumulator (12, 27) with a storage medium and a heat feed device (62) for feeding excess energy as heat into the additional heat accumulator (12, 27), wherein the refrigerant circuit (56) has a second refrigerant line (25) connected to the additional heat accumulator (12, 27) with a flow line (10) and a return line (11).

Description

[0001] The invention relates to a heat pump heating system according to the preamble of claim 1 as well as an operating method, a control system and a computer program therefor.

[0002] To date, an increasing number of buildings are heated by heat pumps.

[0003] The structure of a heat pump consists of three components with which the heat pump system works: • The heat source (air, earth, groundwater) from which the energy is extracted from the environment. • The heat pump, which uses heat pump technology to convert the ambient heat obtained into heating energy and thus makes it usable. • The heat distribution and storage system that distributes or stores the heating energy in the living spaces.

[0004] As is well known, a heat distribution and storage system usually has one or more heating circuits and also heating energy storage units, such as hot water storage units for domestic water and / or storage units for heating water used to operate a building's heating system.

[0005] Currently, the numbers indicate that the air-water heat pump will become the standard for heating future buildings.

[0006] This is because this type of heat pump requires a small number of components and, despite its lower efficiency in generating heat from air due to the significant seasonal and daily fluctuations in outside temperatures, it has an advantage over the year-round constant temperature values ​​of water-to-water heat pumps because it does not require a complex controller and pump structure. Air-source heat pumps also eliminate the need for drilling and other investments, including liability risks for geothermal probes or similar devices.

[0007] Furthermore, changes in the groundwater level, which will occur more frequently in the future climate change, are not decisive for air-water heat pumps, whereas they are essential and performance-threatening for water-water heat pumps.

[0008] The following are known solutions for air heat pumps currently available on the market: • Electricity supplied to the heat pumps via PV systems / electricity generated by the PV system is passed on to the heat pump, which on sunny days may also overheat a heating energy storage unit (hot water and / or heating) in order to capture and utilize the free electrical energy during the day. • Direct heat generation from heating energy storage units, in particular hot water and heating storage units in one or more heating circuits, by means of heating rods which heat up the heating energy storage unit (hot water and / or heating) using solar electrical energy that is not used in the building (so-called surplus energy). • Storage of electrical energy in battery boxes for phase-shifted use at night (daytime storage). • Medium-term storage of electrical solar energy via hydrogen electrolysis • Direct heating of heating energy storage units (hot water and / or heating storage units) via solar domestic water heating (heating coils on the roof, control and feeding into a storage unit).

[0009] A disadvantage of current heat pump solutions is that the heat pump requires electricity to function, which in winter cannot be generated from renewable energies, especially not from solar energy and even more so not from any renewable energy sources installed on the building itself, such as a photovoltaic system. • Storage in the form of batteries is disadvantageous due to battery capacities, costs and excessively rapid self-discharge. • Conversion to hydrogen is disadvantageous due to high costs, water consumption and the inability to store hydrogen in tanks for long periods of time (hydrogen atoms penetrate the tank walls). • Direct storage of heating energy in storage tanks (hot water and / or heating tanks) is not possible in winter if there is snow on the roof. Solar domestic water heating has the additional disadvantage that the energy gains are not utilized in summer, which can cause damage to the entire system due to overheating.

[0010] Furthermore, the minimum flow temperature in the building significantly determines the usability of the temperature spread in the storage tank. For example, if the storage tank temperature is 80°C and the flow temperature is 35°C, a temperature difference of 80-35 = 45°C is usable. If the storage temperature of the heating energy storage tank falls below 35°C, it can no longer be used. Therefore, all energy costs for heating the water temperature in the heating energy storage tank from the cold water level of approximately 25°C to 35°C are lost energy. • The profits from the photovoltaic system in summer cannot be stored and therefore cannot be used, but are fed into the energy supplier's network and are therefore lost at the decentralised level, while at the centralised level they are not needed by the supplier in summer due to surplus.

[0011] The invention aims to make better use of the energy available in a building over a longer period of time, such as a year.

[0012] To achieve this object, the invention provides a heat pump system according to claim 1. Furthermore, an operating method, a control system and a computer program are proposed therefor.

[0013] Advantageous embodiments are the subject of the subclaims.

[0014] The invention provides a heat pump heating system for a building, comprising: a heat source device with a heat source system for providing environmental heat from the environment, a heat pump for converting the environmental heat provided by the heat source device into heating energy for the building, wherein the heat pump has a refrigerant circuit connected to the heat source device with a first refrigerant line which is connected to the heat source system with a flow and return line, and a heat distribution and storage system for distributing or storing heating energy, characterized in that that the heat source device has, in addition to the heat source system, an additional heat storage device with a storage medium and a heat feed device for feeding surplus energy as heat into the additional heat storage device, wherein the refrigerant circuit has a second refrigerant line connected to the additional heat storage device with a flow and return line.

[0015] The heat pump is preferably an air-source heat pump. Accordingly, it is preferred that the heat source system is or has an outdoor unit. The heat source system is formed, in particular, by a fan or blower.

[0016] The heat storage system of the heat source facility can comprise one or more storage units. Examples of storage units include a water tank, a thermally insulated water tank, an additional water tank installed in the building, and a swimming pool.

[0017] A preferred heat pump heating system has a photovoltaic system in particular, which is set up to supply the heat pump with electrical energy.

[0018] It is preferred that the heat feed device comprises an electric heating device supplied with electrical energy by a photovoltaic system, which can also, in particular, feed the heat pump. For example, a heating element powered by excess energy from the PV system is provided.

[0019] It is preferred that the heat feed device is connected to a solar thermal system for supplying thermal solar energy.

[0020] It is preferred that the heat feed device is connected to the heat distribution and storage system (62) for supplying excess heating energy.

[0021] It is also possible for the heat feed device to have its own heat pump, e.g. a heat pump that is significantly smaller than the building heat pump and has a correspondingly lower output temperature can be provided.

[0022] In some embodiments, the heat distribution and storage system comprises a hot water storage tank for supplying the building (54) with hot water.

[0023] In some embodiments, the heat distribution and storage system includes a heating storage tank for supplying a heating system of the building.

[0024] In some embodiments, the heat distribution and storage system includes a hot water heating circuit to supply the building with hot water.

[0025] In some embodiments, the heat distribution and storage system includes a building heating circuit for supplying a heating system of the building.

[0026] In some embodiments, the heat distribution and storage system comprises an additional heating circuit for supplying the heat storage of the heat source device with excess heating energy.

[0027] According to a further aspect, the invention provides an operating method for a heat pump heating system according to one of the preceding embodiments, comprising: (a) storing surplus energy from renewable energy sources as heat in the heat storage unit of the heat source facility; and b) Connecting the refrigerant circuit of the heat pump to the heat source system and / or to the heat storage of the heat source device depending on the outside temperature.

[0028] In some embodiments, step b comprises: b1) supplying the heat pump exclusively with environmental heat from the heat source system when the outside temperature is above a first threshold.

[0029] In some embodiments, step b comprises: b2) additionally or exclusively supplying the heat pump (1) with stored heat from the heat storage unit of the heat source device when the outside temperature is below a first threshold value.

[0030] In some embodiments, step b comprises: b3) supplying the heat pump exclusively with stored heat from the heat storage of the heat source device when the outside temperature is below a second threshold which is lower than the first threshold.

[0031] According to a further aspect, the invention provides a control for a heat pump heating system according to one of the preceding embodiments, wherein the control is designed to control the heat pump heating system to carry out the operating method according to one of the preceding embodiments.

[0032] The control is preferably designed as a computer-implemented control with processor and memory.

[0033] In some embodiments, the heat pump heating system is provided with such a control system.

[0034] According to a further aspect, the invention provides a computer program comprising instructions that cause a heat pump heating system according to one of the preceding embodiments to carry out the operating method according to one of the preceding embodiments.

[0035] Preferred embodiments of the invention relate to a heat pump heating system with an air-source heat pump, in which air serves as the heat source. As explained above, such an air-source heat pump offers significant advantages, particularly when retrofitting existing buildings.

[0036] Preferred embodiments of the invention can solve a transfer of surplus energy generated in summer to winter in such a way that this energy is available to a heat pump (air-water or water-water or air-air) in winter.

[0037] Advantages of preferred embodiments of the invention are that the building's existing installation systems can be retained. There's no need to replace or upgrade the heat pump. There's no need to dismantle an existing circuit.

[0038] One advantage of preferred designs is that existing simple or complex systems can continue to heat and operate as before.

[0039] Only one line is added: a water tank is installed (inside or outside the building), the size of which depends solely on the surplus energy and the space available on the property.

[0040] In summer, this water tank is heated to the highest possible temperature, primarily via a PV system using a heating element or heat pump. The heat pump preferably operates exclusively with surplus solar power in summer, thus generating no electricity costs.

[0041] The tank is very well insulated. Existing tanks (e.g., underground or building tanks) for water heating are used for this purpose.

[0042] In contrast to previous solutions, the surplus energy is not used on the heating energy side, for example in heating energy storage or buffer storage in one or more heating circuits, but on the feed-in side of the heat pump, in particular to increase the temperature level from which the heat pump converts heat into heating energy.

[0043] According to the invention, a second refrigerant line is installed from the heat pump, which instead of leading to the previous heat source, specifically the external fan, now leads to the additional heat storage unit provided on the heat source side and back again. This suggests to the heat pump that it is drawing energy from warm ambient air.

[0044] In some designs, the storage medium temperature, especially the water temperature, is adjusted to the optimal efficiency temperature of the respective heat pump via a commercially available mixer tap (mixing the flow and return lines). This significantly increases the efficiency of the heat pump while keeping acquisition and installation costs low. Solar energy gains in summer can be utilized in winter.

[0045] In reality, a temperature difference of approximately 80-90°C to a reasonable 20°C (but down to 10°C), thus 60-70°C, is available, which is used as input energy for the heat pump instead of the significantly colder air in winter. This reduces the required energy pumping head of the heat pump to the target level, which in turn leads to a significant increase in efficiency.

[0046] It is not necessary to convert the heat storage back into electrical energy (the efficiency is far too low); the medium remains “heat” as soon as the conversion of free electrical energy into heat has taken place once.

[0047] To convert or upgrade an existing heat pump heating system to a heat pump heating system according to an embodiment of the invention, only the following materials are used in some embodiments: Material lists: • Geothermal storage tanks with sufficient operating pressures (3-6 bar, 110°C) insulated, e.g. from Haase (https: / / www.haasetank.de / waermespeicher / erdwaermespeicher / ) • Mixer tap, e.g. Wilo (https: / / www.manomano.de / cat / pumpengruppe+mischer+wilo) • Refrigerant line, available from the heat pump manufacturer • T-piece for refrigerant line with switch, usable from previous switches in sanitary requirements, stainless steel requirement, if necessary special switches from the heat pump manufacturers. • Control of the heat pump to select the respective pipe routing via Smarthome or manually.

[0048] Examples of embodiments are explained in more detail below using the attached drawings. They show: Fig. 1 a perspective overall overview of an embodiment of a heat pump heating system for a building; Fig. 2 a diagram of the embodiment of the heat pump heating system as a P&I flow diagram, circuit diagram; Fig. 3 a diagram for a further embodiment of the heat pump heating system, wherein an alternative heat storage or further heat storage, e.g. a swimming pool, is indirectly connected to a heating circuit; and Fig. 4 a diagram for yet another embodiment of the heat pump heating system, wherein an alternative heat storage or further heat storage, e.g. a swimming pool, is directly connected to a heating circuit.

[0049] The figures show different embodiments of a heat pump heating system 50 for a building 54. Fig. 1 shows a perspective overview, Fig. 2 a circuit diagram and Fig. 3 and Fig. 4 show circuit diagrams with alternatives for the design of a heat source device 52.

[0050] The heat pump heating system 50 comprises a heat source device 52 with a heat source system 2 for providing ambient heat from the surroundings, a heat pump 1 for converting the ambient heat provided by the heat source device 52 into heating energy for the building 54, and a heat distribution and storage system 60 for distributing or storing the heating energy. The heat pump 1 has a refrigerant circuit 56 connected to the heat source device 52 with a first refrigerant line 58, which is connected to the heat source system 2 via a supply line 58.1 and a return line 58.2.

[0051] In addition to the heat source system 2, the heat source device 52 comprises an additional heat accumulator 12, 27 with a storage medium and a heat feed device 62 for feeding excess energy as heat into the additional heat accumulator 12, 27. In addition to the first refrigerant line 58, the refrigerant circuit 56 comprises a second refrigerant line 25 connected to the additional heat accumulator 12, 27 via a supply line 10 and a return line 11.

[0052] For this purpose, the second refrigerant line 58 is connected via a mixer tap 14 to a heat exchanger 13 arranged in the additional heat accumulator 12, 27.

[0053] In the illustrated embodiment, the heat pump 1 is designed as an air heat pump, wherein the heat source device 52 has an outdoor unit 2 with a fan or a blower as a heat source system, in particular for heat pump operation at higher outside temperatures.

[0054] The heat distribution and storage system 62 connected to the heat pump 1 has a first heating circuit, for example a building heating circuit 68 for supplying a heating system 5, such as underfloor heating of the building 54, with a first heating energy storage unit in the form of a heating storage unit 4. Optionally, a second heating circuit, for example a hot water heating circuit 66 for supplying the building 54 with hot water, in particular with a second heating energy storage unit in the form of a hot water storage unit 6, is provided.

[0055] Furthermore, a control system is provided, for example, with a central control unit 8, which can be designed, for example, as a digital (smart) version with a processor and memory or as an analog version. The control system controls control valves and other actuators of the heat pump heating system 50.

[0056] The heat accumulator 12, 27 of the heat source device 52 is an additional component that is provided in addition to the one or more heating energy accumulators 4, 6 of the heat distribution and storage system 62.

[0057] The additional heat storage unit 12, 27, which is configured as an additional heat source in addition to a conventional heat source to supply heat to the heat pump 1 on the refrigerant side, can comprise one or more storage units. Examples include an additional (ground) storage unit, e.g., underground storage, indoor storage, a swimming pool 27 filled with a storage medium, e.g., water, a water tank, or a thermally insulated water tank.

[0058] The following additional options and variants are available for the heat storage unit 12, 27 of the heat source device 52.

[0059] As in Fig. 3 and Fig. As indicated in Figure 4, an internal or external swimming pool 27 can be used as a large water storage tank. For example, a highly insulating cover in winter and / or general exterior wall insulation for outdoor swimming pools is provided. Accordingly, lower temperatures must prevail in the heat storage tank used on the refrigerant side than in heating energy storage tanks 4, 6, e.g., 35°C instead of 80°C for a correspondingly large size.

[0060] A combination of underground tanks or other water tanks with swimming pools 27 can also be provided as heat storage 12, 27 on the heat source side of the heat pump 1. Fig. 3 shows such a combination, wherein the swimming pool 27 in this example is indirectly coupled via an inlet 28 and return 29 and a pump 30 for compensating height differences with a heat exchanger 31 into a water tank as heat storage 12.

[0061] The spaces of old oil tanks can be used for the heat storage 12.

[0062] For the heat storage tanks 12, 27, a completely flexible design of tank volumes and temperatures results, which can be easily and directly calculated from the specific building system alone.

[0063] According to Fig. 4, the swimming pool 27 can also be used as the sole heat storage unit on the heat source side. As indicated in this example, when using the swimming pool 27 as the sole or additional heat storage unit 12, 27, a movable partition can be provided. Thus, a separate, for example, water-permeable area in the swimming pool 27 can be used as a heat storage unit.

[0064] As in Fig. 1 and Fig. 2, the heat pump heating system 50 according to the embodiments shown further comprises a photovoltaic system 19 for converting solar radiation 18 into electrical energy, for example also for operating the heat pump 1.

[0065] In some embodiments, the heat feed device 62 comprises an electric heating device supplied with excess electrical energy by the photovoltaic system 19. For example, a heating rod 22 is provided as the electric heating device, which is connected via a power supply 21 to an inverter 20 (with switch R) that is powered by the PV system 19.

[0066] The heat pump 1 can be operated by electricity from a power grid or alternatively by solar energy via a power supply 23 connected to the inverter 20.

[0067] Alternatively or in addition to the electric heating device, the heat feed device 62, in some embodiments, has an additional heating circuit 24, the flow 16 and return 17 of which can be connected to the heating side of the heat pump 1 by means of an isolating valve 15 (control valve ET). Thus, for example, in summer, excess energy can be converted into heat by the heat pump 1, which is stored in the heat accumulator 12 of the heat source device 52 for later use, for example, in winter.

[0068] The heat pump heating system 50 can, for example, be operated using an operating procedure which comprises the following steps: a) storing surplus energy from renewable energy sources as heat in the heat storage unit 12, 27 of the heat source device 62; and b) Connecting the refrigerant circuit 56 of the heat pump 1 to the heat source system 2 and / or to the heat accumulator 12, 27 of the heat source device 52 depending on the outside temperature.

[0069] For example, any excess energy generated by the PV system 19, e.g., in summer, is stored as heat in the heat storage unit 12, 27. The PV system 19 can thus run continuously; no energy remains unused.

[0070] Step b) is carried out, for example, with the following sub-steps: b1) supplying the heat pump (1) exclusively with environmental heat from the heat source system (2) when the outside temperature is above a first threshold value; b2) additionally or exclusively supplying the heat pump (1) with stored heat from the heat accumulator (12, 27) of the heat source device (52) when the outside temperature is below a first threshold value; b3) supplying the heat pump (1) exclusively with stored heat from the heat accumulator (12, 27) of the heat source device (52) when the outside temperature is below a second threshold value which is lower than the first threshold value.

[0071] The control system is configured to operate the heat pump heating system 50 according to the aforementioned operating method. For example, a computer program with corresponding instructions is provided for this purpose.

[0072] In the following, variants and concrete possible embodiments of the heat pump heating system 50 are explained.

[0073] The heat pump 1 can be installed locally separated from the heat source system / outdoor unit 2, for example, by a house wall 3. Designs with a combined heat source system and heat pump are also possible.

[0074] The heat pump 1 can operate multiple heating circuits, which can be controlled internally. In the illustrated embodiment, the additional release valve 15 controls an additional (here, third) heating circuit 24 for supplying the heat accumulator 12, 27 of the heat source device 62 with excess energy.

[0075] In some embodiments, the heat pump 1 operates two separate heating circuits 68, 66 for heating and hot water, as shown. Depending on the design, both heating circuits 68, 66 can also be combined in one of the heat energy storage units 4 or 6.

[0076] The underfloor heating 5 shown here is exemplary and can also be replaced or extended by another heating system, for example radiators.

[0077] The central control unit 8 handles digital process control. Integration into smart home systems is conceivable. Alternatively, the required control valves (W1, W2, M1, M2, ET) and electrical switching components (R) could also be controlled manually.

[0078] A switch 9 for the refrigerant circuit extends the refrigerant circuit between heat pump 1 and outdoor unit 2. The heat source can be selected using directional valves W1 and W2. Depending on the valve position, the outdoor unit / fan (2) or the additional (ground) storage tank is connected.

[0079] The heat exchange can be regulated via the mixing unit 14. The flow rate of the bypass determines the amount of energy transferred to the refrigerant and, consequently, the amount of energy extracted via the cooling coil (heat exchanger) of heat pump 1.

[0080] The inverter 20 can be designed such that an electrical switching component R either transfers the power generated to a heating element 22 installed in the additional (ground) storage tank 12 in order to heat the storage medium (water), or directly operates the heat pump 1.

[0081] In addition to the (ground) storage 12, the system can be Fig. 3 can be expanded by an additional storage tank 27. A swimming pool, for example, is suitable. This is integrated into the additional (ground) storage tank via a heat exchanger 31. A pump 30 can compensate for any differences in elevation.

[0082] Alternatively, the additional storage tank / swimming pool 27 could also have a separate area 32 for the additional heating circuit 24, the optional heating element 22 and the heat exchanger 13. Depending on the design, this area can be directly (see Fig. 4) or indirectly (see Fig.3, e.g. via a heat exchanger 31) to the additional heating circuit 24.

[0083] In order to improve the utilization of energy available throughout the year for heat generation in or on buildings (54), the invention provides a heat pump heating system (50) for a building (54), comprising: a heat source device (52) with a heat source system (2) for providing environmental heat from the environment, a heat pump (1) for converting the environmental heat provided by the heat source device (52) into heating energy for the building (54), wherein the heat pump (1) has a refrigerant circuit (56) connected to the heat source device (52) with a first refrigerant line (58) which is connected to the heat source system (2) with a flow line (58.2) and a return line (58.2), and a heat distribution and storage system for distributing or storing heating energy, characterized in that that the heat source device, in addition to the heat source system (2), has an additional heat accumulator (12, 27) with a storage medium and a heat feed device (62) for feeding excess energy as heat into the additional heat accumulator (12, 27), wherein the refrigerant circuit (56) has a second refrigerant line (25) connected to the additional heat accumulator (12, 27) with a flow line (10) and a return line (11). List of reference symbols 1 heat pump 2 heat source system / outdoor unit e.g. fan 3 house wall 4 first heating energy storage for first heating circuit e.g. heating and / or hot water 5 Heating e.g. underfloor heating 6 second heating energy storage for second (optional) heating circuit e.g. hot water 7 Hot water supply e.g. shower 8 Central control unit e.g. as digital (smart) version or analogue through mechanical actuation of the control valves 9 Switch for refrigerant circuit, directional valves W1 and W2 10 Flow (refrigerant supply line to the additional (ground) storage tank) 11 Return (refrigerant from additional (ground) storage) 12 Additional (ground) heat storage e.g. underground storage, storage in the house, swimming pool, filled with storage medium e.g. water 13 heat exchangers 14 Mixing unit, control valves M1 and M2 15 Isolating valve for additional heating circuit, control valve ET 16 Inlet for additional heating circuit (from heat pump) 17 Return for additional heating circuit (to the heat pump) 18 Solar radiation 19 photovoltaic (PV) systems 20 inverters with switch R 21 Power supply for heating element in additional (ground) storage 22 Heating element for additional (ground) storage 23 Alternative power supply for the heat pump 24 Additional heating circuit 25 second refrigerant line 26 Connection for optional heating element 27 Additional storage, e.g. swimming pool, second (ground) storage 28 Inlet into (ground) storage 29 Return to another storage 30 Pump for compensation of height differences 31 heat exchangers for coupling into (ground) storage 32 Separate, but water-permeable area in the swimming pool for heating circuit heat exchanger and heating element 50 heat pump heating systems 52 Heat source device 54 buildings 56 Refrigerant circuit 58 first refrigerant line 58.1 Flow (first refrigerant line) 58.2 Return (first refrigerant line) 60 Heat distribution and storage system 62 Heat feed-in device 64 fans 66 Hot water heating circuit 68 Building heating circuit

Claims

[1] Heat pump heating system (50) for a building (54), comprising: a heat source device (52) with a heat source system (2) for providing environmental heat from the environment, a heat pump (1) for converting the environmental heat provided by the heat source device (52) into heating energy for the building (54), wherein the heat pump (1) has a refrigerant circuit (56) connected to the heat source device (52) with a first refrigerant line (58) which is connected to the heat source system (2) with a flow line (58.1) and a return line (58.2), and a heat distribution and storage system (62) for distributing or storing the heating energy, characterized by , that the heat source device, in addition to the heat source system (2), has an additional heat accumulator (12, 27) with a storage medium and a heat feed device (62) for feeding excess energy as heat into the additional heat accumulator (12, 27), wherein the refrigerant circuit (56) has a second refrigerant line (25) connected to the additional heat accumulator (12, 27) with a flow line (10) and a return line (11). [2] Heat pump heating system (50) according to claim 1, characterized by that the heat source system 2.1 is or has an outdoor unit (2), and / or 2.2 has a fan (64) or a blower, so that the heat pump (1) is designed as an air heat pump. [3] Heat pump heating system (50) according to one of the preceding claims, characterized byin that the heat accumulator (12, 27) of the heat source device (52) comprises one or more accumulators selected from the group comprising a water tank, a thermally insulated water tank, a water tank to be additionally installed in the building and a swimming pool (27). [4] Heat pump heating system (50) according to one of the preceding claims, characterized by a photovoltaic system (19) which is designed to supply the heat pump (1) with electrical energy. [5] Heat pump heating system (50) according to one of the preceding claims, characterized by that the heat feed device (62) 5.1 has an electric heating device supplied with electrical energy by a photovoltaic system (19) and / or 5.2 is connected to a solar thermal system for supplying thermal solar energy and / or 5.3 is connected to the heat distribution and storage system (62) for supplying surplus heating energy and / or 5.4 has its own heat pump. [6] Heat pump heating system (50) according to one of the preceding claims, characterized by that the heat distribution and storage system (60) comprises at least one or more of the following units: 6.1 a hot water tank (6) for supplying the building (54) with hot water; 6.2 a heating storage tank (4) for supplying a heating system (5) of the building (54); 6.3 a hot water heating circuit (66) for supplying the building (54) with hot water; 6.4 a building heating circuit (68) for supplying a heating system (5) of the building (54); 6.5 an additional heating circuit (24) for supplying the heat accumulator (12, 27) of the heat source device (52) with excess heating energy. [7] Heat pump heating system (50) according to one of the preceding claims, characterized by that the second refrigerant line (25) has a mixer battery (14) for adjusting a temperature level of the refrigerant side of the heat pump (1). [8] Operating method for a heat pump heating system according to one of the preceding claims, comprising: a) storing excess energy from renewable energy sources as heat in the heat accumulator (12, 27) of the heat source device (62); and b) Connecting the refrigerant circuit (56) of the heat pump (1) to the heat source system (2) and / or to the heat accumulator (12, 27) of the heat source device (52) depending on the outside temperature. [9] Operating method according to claim 8, wherein step b) comprises at least one or more of the steps: b1) supplying the heat pump (1) exclusively with environmental heat from the heat source system (2) when the outside temperature is above a first threshold value; b2) additionally or exclusively supplying the heat pump (1) with stored heat from the heat accumulator (12, 27) of the heat source device (52) when the outside temperature is below a first threshold value; b3) supplying the heat pump (1) exclusively with stored heat from the heat accumulator (12, 27) of the heat source device (52) when the outside temperature is below a second threshold value which is lower than the first threshold value. [10] Control for a heat pump heating system (50) according to one of claims 1 to 7, wherein the control is designed to control the heat pump heating system to carry out the operating method according to one of claims 8 or 9. [11] Control according to claim 10, designed as a computer-implemented control with processor and memory. [12] Heat pump heating system (50) according to one of claims 1 to 7, further comprising a control according to one of claims 10 or 11. [13] Computer program comprising instructions causing a heat pump heating system according to any one of claims 1 to 7 or 12 to carry out the operating method according to any one of claims 8 or 9.

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