Methods and apparatus for control of modular heat pump arrangement

Abstract

A heating arrangement comprises one or more modular heat pumps connected to a heat source and powered by an electric grid The arrangement also includes an accumulator tank connected to the heat pumps, a direct electric heater located within the accumulator tank and powered by the electric grid, and an external heat exchanger connected to the accumulator tank and connected to a hot tap water system. A controller is configured to control the operation of the heating arrangement and to configure operational temperature ranges of a fluid in the accumulator tank based on a trigger signal indicating a normal supply, a surplus, or a deficiency of electricity in the electric grid. The controller configures the operational temperature range of the fluid in the accumulator tank to a first temperature range when the trigger signal indicates a normal supply of electricity, a second temperature range when the trigger signal indicates a surplus of electricity, and a third temperature range when the trigger signal indicates a deficiency of electricity.

Description

[0001] Methods and Apparatus for Control of Modular Heat Pump Arrangement

[0002] Field

[0003] The technology relates to the field of domestic heating systems, specifically focusing on energy-efficient and environmentally friendly solutions for providing space heating and hot tap water in residential buildings. This includes the integration of heat pumps, accumulator tanks, and control systems to optimize the use of electricity from the grid and renewable energy sources.

[0004] Background

[0005] Heat pumps are widely used for providing heating solutions in residential and commercial buildings. These systems are known for their energy efficiency and ability to provide both heating and cooling. Heat pumps work by transferring heat from a heat source, such as air or water, to a heat sink, such as a building's interior or an accumulator tank. The efficiency of a heat pump is typically measured by its coefficient of performance (COP), which is the ratio of heat output to electrical power input.

[0006] In recent years, there has been a growing interest in using renewable energy sources, such as wind and solar power, to generate electricity. However, these sources are intermittent and can lead to fluctuations in the electricity supply. This poses a challenge for heat pump systems, as their performance and efficiency can be negatively affected by these fluctuations.

[0007] Current heat pump control solutions are designed to provide the best COP under the assumption of a stable electricity supply. This design does not account for fluctuations in electricity supply, leading to inefficient operation during periods of volatile supply. Furthermore, these control solutions may not have adaptive control algorithms that can adjust to varying electricity supply conditions, resulting in suboptimal performance and higher operation costs.

[0008] In addition, heat pump systems may lack management capabilities to handle fluctuations in electricity supply. This can result in inefficient operation during periods of volatile supply, as the system is unable to store excess energy during periods of high supply or draw from stored energy during periods of low supply.

[0009] Some prior art solutions for heat pump arrangements include the use of two accumulator tanks, one for accumulating heat (acting as a thermal battery) and one for hot tap water. However, using two accumulator tanks increases cost and complexity.

[0010] Moreover, some prior art solutions for small heat pump arrangements (up to 10 kW) may only be designed for temperatures up to 60 degrees Celsius, limiting their ability to accumulate excess thermal energy over the 55-60 degrees needed for the hot tap water.

[0011] Therefore, there is a need for an improved heat pump control solution that can adapt to fluctuations in electricity supply, provide efficient operation during periods of volatile supply, and effectively manage energy storage and utilization.

[0012] Summary

[0013] According to a first aspect of the disclosure, a heating arrangement is provided, which comprises one or more modular heat pumps connected to a heat source and powered by an electric grid. The heating arrangement also includes an accumulator tank connected to the one or more modular heat pumps, a direct electric heater located within the accumulator tank and powered by the electric grid, an external heat exchanger connected to the accumulator tank and connected to a hot tap water system, and a controller configured to control the operation of the heating arrangement and to configure operational temperature ranges of a fluid in the accumulator tank based on a trigger signal indicating a normal supply, a surplus, or a deficiency of electricity in the electric grid. The controller is configured to configure the operational temperature range of the fluid in the accumulator tank to a first temperature range when the trigger signal indicates the normal supply of electricity, configure the operational temperature range of the fluid in the accumulator tank to a second temperature range higher than the first temperature range when the trigger signal indicates the surplus of electricity, and configure the operational temperature range of the fluid in the accumulator tank to a third temperature range, where the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range, when the trigger signal indicates the deficiency of electricity. This aspect of the disclosure provides the advantage of optimizing the use of electricity from the grid, thereby reducing energy costs and promoting energy efficiency.

[0014] This aspect of the disclosure further provides the advantage of having dual use of the accumulator tank. This is achieved due to the possibilities of controlling the operational temperature ranges in the accumulator tank based on the indication of the trigger signal such that the temperature range does not go too far below from the temperatures needed in the hot tap water. Thus, the third temperature range is preferably in vicinity of the first temperature range, since the first temperature range is in vicinity to the temperature of the hot tap water.

[0015] The term “normal supply of electricity” is herein also referred to as a normal mode or normal mode operation. The term “surplus of electricity” is herein also referred to as a charging mode or charging mode operation. The term “deficiency of electricity” is herein also referred to as a discharging mode or discharging mode operation. Thus, when the controller is configured to configure the operational temperature range of the fluid in the accumulator tank to the first temperature range, the heating arrangement is operating in the normal operation mode. When the controller is configured to configure the operational temperature rang of the fluid in the accumulator tank to the second temperature range, the heating arrangement is operating in the charging mode. When the controller is configured to configure the operational temperature range of the fluid in the accumulator tank to the third temperature range, the heating arrangement is operating in the discharging mode. Thus, the operational mode, or operation mode, of the heating arrangement may be in the normal mode, the charging mode, or the discharging mode.

[0016] According to some embodiments, the heating arrangement further comprises a space heating system connected to the output of the one or more modular heat pumps, wherein the controller controls the operation of the space heating system based on a space heating need. This provides the advantage of efficiently managing the heating needs of a space, ensuring optimal comfort while minimizing energy consumption.

[0017] According to some embodiments, the heating arrangement further comprises a first three-way valve connected to a return flow of the output from the one or more modular heat pumps, the first connection of the accumulator tank, and the return flow from the space heating system, wherein the first three-way valve is configured to control a flow of heat to the accumulator tank or to the space heating system based on space heating need or on a heating need of the hot tap water system. The heating arrangement also includes a second three-way valve connected to a forward flow of the output from the one or more modular heat pumps, the third connection of the accumulator tank, and a forward flow to the space heating system, wherein the second three-way valve is configured to control a flow of heat from the accumulator tank based on the operational mode of the heating arrangement and based on the space heating need. This provides the advantage of effectively directing heat to where it is needed most, ensuring efficient use of energy and maintaining optimal temperatures in both the accumulator tank and the space heating system.

[0018] According to some embodiments, if the trigger signal indicates the deficiency of electricity and the space heating system requires heat, the first three-way valve and the second three-way valve is configured to direct the flow of heat from the accumulator tank to the space heating system. This provides the advantage of efficiently utilizing stored heat in the accumulator tank to meet the heating needs of the space heating system during periods of electricity deficiency in the grid.

[0019] According to some embodiments, if the trigger signal indicates the deficiency of electricity, the controller is configured to disable the direct electric heater and the one or more modular heat pumps. This provides the advantage of conserving electricity during periods of deficiency in the grid, ensuring that the heating arrangement does not contribute to further strain on the grid.

[0020] According to some embodiments, the trigger signal is generated based on at least one of real-time electricity market prices, availability of excess energy from renewable sources, a difference between a generated power from solar panels and a current demand of electricity in the associated house or apartment, or a level of electricity supply in the electric grid with different thresholds indicating surplus, normal, or deficiency conditions. This provides the advantage of dynamically adjusting the operational temperature range of the accumulator tank based on various factors affecting the supply and demand of electricity, ensuring efficient use of energy and minimizing energy costs.

[0021] According to some embodiments, the trigger signal is generated based on information about frequency balancing the electric grid, wherein, if the information indicates a need to increase the frequency in the electric grid, the trigger signal indicates the deficiency of electricity, and if the information indicates a need to decrease the frequency in the electric grid, the trigger signal indicates the surplus of electricity. This provides the advantage of helping to maintain grid stability by balancing the supply and demand of electricity, reducing the risk of blackouts or brownouts. According to some embodiments, the heat source is an air or water-based heat source. This provides the advantage of allowing for flexibility in the choice of heat source, ensuring compatibility with various types of heating systems and environments.

[0022] According to some embodiments, each modular heat pump has a height between 25-45 cm, a width between 15-35 cm, and a depth between 45-65 cm. This provides the advantage of a compact and portable design, allowing for easy installation and integration into various types of buildings and spaces.

[0023] According to some embodiments, the one or more modular heat pumps comprise a frequency-controlled compressor with a power range from 1-6 kW thermal heat. This provides the advantage of allowing for precise control of the heat output, ensuring optimal performance and energy efficiency.

[0024] According to some embodiments, the accumulator tank stores 70-200 liters of fluid. This provides the advantage of accommodating various storage capacities, ensuring compatibility with different heating system requirements and building sizes.

[0025] According to some embodiments, the accumulator tank, the external heat exchanger, the first three-way valve, the second three-way valve, and the direct electric heater are each structured and configured to manage temperatures up to 90 degrees Celsius. This provides the advantage of ensuring that the heating arrangement can handle high temperatures, ensuring safe and efficient operation.

[0026] According to some embodiments, the first temperature range is between 45-55 degrees Celsius, the second temperature range is between 70-80 or 80-90 degrees Celsius, and the third temperature range is between 40-45 degrees Celsius. Thus, the lowest temperature in the second temperature range is preferably higher than the highest temperature in the first temperature range. This provides the advantage of defining specific temperature ranges for each operational mode, ensuring optimal performance and energy efficiency.

[0027] According to a second aspect of the disclosure, a method for configuring an operational temperature range in an accumulator tank of a heating arrangement according to the first aspect is provided. The method comprises monitoring a trigger signal indicating a normal supply, a surplus, or a deficiency of electricity in an electric grid; configuring an operational temperature range of a fluid in the accumulator tank to a first temperature range when the trigger signal indicates the normal supply of electricity; configuring the operational temperature range of the fluid in the accumulator tank to a second temperature range higher than the first temperature range when the trigger signal indicates the surplus of electricity; and configuring the operational temperature range of the fluid in the accumulator tank to a third temperature range, where the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range, when the trigger signal indicates the deficiency of electricity. This aspect of the disclosure provides the advantage of dynamically adjusting the operational temperature range of the accumulator tank based on the supply and demand of electricity in the grid, ensuring efficient use of energy and minimizing energy costs.

[0028] According to some embodiments, the first temperature range is between 45-55 degrees Celsius, the second temperature range is between 70-80 or 80-90 degrees Celsius, and the third temperature range is between 40-45 degrees Celsius. This provides the advantage of defining specific temperature ranges for each operational mode, ensuring optimal performance and energy efficiency.

[0029] Brief Description of the Drawings

[0030] Examples are described in more detail below with reference to the appended drawings.

[0031] Figure 1 is a schematic representation of a heating arrangement comprising the heat pumps, accumulator tank, direct electric heater, the external heat exchanger and its connections to the accumulator tank and hot tap water system, the controller and its connections to various components of the heating arrangement and the first and second three-way valves and their connections to the heat pumps, accumulator tank, and space heating system.

[0032] Figure 2 is a flowchart illustrating a method for configuring operational temperature ranges in an accumulator tank of the heating arrangement.

[0033] Figure 3 is a schematic representation of the first and second three-way valves configuration when space heating is needed in discharging mode operation.

[0034] Detailed Description

[0035] The detailed description set forth below provides information and examples of the disclosed technology with sufficient detail to enable those skilled in the art to practice the disclosure. Figure 1 shows a schematic representation of a heating arrangement 100, which includes various components and their connections. The heating arrangement 100 comprises one or more modular heat pumps 105a, 105b connected to a heat source 170 on an input side and powered by an electric grid 195. Herein after, “the one or more modular heat pumps 105a, 105b” will also be referred to as “heat pumps 105a, 105b”. A pump 132 and an accumulator tank 110 is connected via a first connection 141 , a second connection 142, and a third connection 143 to the output side of the heat pumps 105a, 105b. A direct electric heater 115 is located within the accumulator tank 110 and is powered by the electric grid 195. An external heat exchanger 120 has a first side connected to the accumulator tank 110 and a pump 130 and a second side connected to a hot tap water system 190. A controller 125 is configured to control the operation of the heating arrangement 100 and to configure operational temperature ranges of the fluid in the accumulator tank 110 based on a trigger signal 150, which indicates a normal supply, a surplus, or a deficiency of electricity in the electric grid 195. The term “normal supply of electricity” is herein also referred to as a normal mode or normal mode operation. The term “surplus of electricity” is herein also referred to as a charging mode or charging mode operation. The term “deficiency of electricity” is herein also referred to as a discharging mode or discharging mode operation. The controller 125 furthermore controls the operation of the heat pumps based on the actual temperature of the fluid in the accumulator tank 155, the tap water needs 165 and the operation temperature range. Optionally in some examples, the heating arrangement 100 further comprises a space heating system 180 connected to the output of the heat pumps, wherein the controller 125 controls the operation of the space heating system 180 based on a space heating need 160.

[0036] The heating arrangement 100 further comprises a first three-way valve 135 connected to the return flow of the output from the heat pumps 105a, 105b, the first connection 141 of the accumulator tank, and the return flow from the space heating system, wherein the first three-way valve 135 controls the flow of heat to the accumulator tank 110 or to the space heating system 180 based on the heating needs of the space heating 180 or hot tap water system 190. A second three-way valve 140 is connected to the forward flow of the output from the heat pumps 105a, 105b, the third connection of the accumulator tank 143, and the forward flow to the space heating system, wherein the second three-way valve 140 controls the flow of heat from the accumulator tank 110 based on the operational mode of the heating arrangement 100 and based on the heating needs of the space heating system 180.

[0037] Figure 2 is a flowchart illustrating a method for configuring operational temperature ranges in an accumulator tank 110 of the heating arrangement 100. The method includes monitoring 210 a trigger signal 150, configuring 220 the operational temperature range of the fluid in the accumulator tank 110 to a first temperature range when the trigger signal 150 indicates a normal supply of electricity, configuring 230 the operational temperature range of the fluid in the accumulator tank 110 to a second temperature range higher than the first temperature range when the trigger signal 150 indicates a surplus of electricity, and configuring 240 the operational temperature range of the fluid in the accumulator tank 110 to a third temperature range when the trigger signal 150 indicates a deficiency of electricity. In one example, the third temperature range is at least partially overlapping the first temperature range, In another example, the third temperature range is the same as the first temperature range. In yet another example, the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range.

[0038] Figure 3 is a schematic representation of the first and second three-way valves configuration when space heating is needed in discharging mode operation. The first three-way valve 135 is connected to the return flow of the output from the heat pumps 105a, 105b, the first connection 141 of the accumulator tank 110, and the return flow from the space heating system 180. The first three-way valve 135 controls the flow of heat to the accumulator tank 110 or to the space heating system 180 based on the heating needs of the space heating or hot tap water system. The second three-way valve 140 is connected to the forward flow of the output from the heat pumps 105a, 105b, the third connection 143 of the accumulator tank 110, and the forward flow to the space heating system 180. The second three-way valve 140 controls the flow of heat from the accumulator tank 110 based on the operational mode of the heating arrangement 100 and based on the heating needs of the space heating system 180. In case the controller 125 is configured for discharging mode operation and there is a need for space heating, the first three-way valve 135 and the second three-way valve 140 are configured so that third connection 143 of the accumulator tank 110 act as an inlet 146, and the second connection 142 of the accumulator tank 110 acts as an outlet 146. 2. Component Details

[0039] This section provides a detailed description of the various components of the heating arrangement 100, and in some examples, more specifically a Domestic Heating Arrangement (DHA), and their interactions with each other.

[0040] 2.1. Modular Heat Pumps

[0041] The DHA comprises one or more modular heat pumps 105a, 105b. These modular heat pumps are designed to be compact, replaceable, and easily transportable, allowing for convenient installation and maintenance. In some examples, each heat pump module may have a height between 25-45 cm, a width between 15-35 cm, and a depth between 45-65 cm.

[0042] 2.1.1. Function and Interaction with Other Components

[0043] The heat pumps 105a, 105b are connected to a heat source 170 on the input side and powered by an electric grid 195. The heat pumps extract heat from the heat source 170 and transfer it to the accumulator tank 110 on the output side. The controller 125 controls the operation of the heat pumps 105a, 105b based on the trigger signal 150, hot tap water need 165, space heating need 160, and actual accumulator tank fluid temperature 155. This allows the DHA to efficiently manage the heating needs of the space heating system 180 and hot tap water system 190.

[0044] 2.2. Heat Source

[0045] The heat source 170 provides the necessary heat input for the heat pumps 105a, 105b to operate.

[0046] 2.2.1 . Air or Water-Based Heat Source

[0047] In one example, the heat source 170 may be an air heat source, and the one or more modular heat pumps 105a, 105b are air / water heat pumps. In another example the heat source 170 may be a water-based heat source and the one or more modular heat pumps 105a, 105b are water / water heat pumps. This allows the DHA to be compatible with various types of heat sources, providing flexibility in installation and operation. 2.3. Accumulator Tank

[0048] The accumulator tank 110 is connected to the output side of the heat pumps 105a, 105b and stores the heat generated by the heat pumps. The accumulator tank 110 has a storage capacity of 70-200 liters of fluid, which may be tap water, purified water, or distilled water, and can accommodate temperatures up to 90 degrees Celsius.

[0049] 2.3.1. Connections and Specifications

[0050] The accumulator tank 110 comprises a first connection 141 , a second connection 142, and a third connection 143. The first connection 141 is connected at the lower part of the accumulator tank and acts as an outlet when charging the accumulator tank in normal mode and charging mode. The second connection 142 is connected at the upper part of the accumulator tank and acts as an outlet when space heating is needed in discharging mode, and as an inlet when charging the accumulator tank in normal mode and charging mode. The third connection 143 is connected in between the first connection and second connection, preferably in the lower part of the accumulator tank, and acts as an inlet in discharging mode.

[0051] 2.4. Direct Electric Heater

[0052] The direct electric heater 115 is located within the accumulator tank 110 and is powered by the electric grid 195. The direct electric heater 115 is made of heat- resistant materials capable of withstanding temperatures up to 90 degrees Celsius.

[0053] 2.4.1. Function and Interaction with Controller

[0054] The controller 125 controls the operation of the direct electric heater 115 based on the trigger signal 150, hot tap water need 165, and actual accumulator tank fluid temperature 155 and optionally the space heating need 160. In some examples, if the trigger signal indicates a normal mode operation (i.e. the normal supply of electricity), and the hot tap water need is high and the accumulator tank fluid temperature is low, the controller may activate the direct electric heater to quickly heat up the water in the accumulator tank to meet the demand. If the trigger signal indicates a charging mode operation (i.e. the surplus of electricity), the controller may activate the direct electric heater to heat up the water in the accumulator tank above temperatures the heat pump can deliver (above 60-65 degrees Celsius). If the trigger signal indicates a discharging mode operation (i.e. the deficiency of electricity), the controller may deactivate the direct electric heater. Furthermore, the controller 125 may be a processor or a processing unit,

[0055] 2.5. External Heat Exchanger

[0056] The external heat exchanger 120 is connected to the accumulator tank 110 on the first side and the hot tap water system 190 on the second side. The external heat exchanger 120 is designed to accommodate temperatures up to 90 degrees Celsius.

[0057] 2.5.1. Connections and Specifications

[0058] The first side of the external heat exchanger 120 is connected to a pump 130, which controls the fluid flow from the accumulator tank to the heat exchanger so that hot tap water around 45-47 degrees Celsius is generated. In one example, in Normal mode operation, a first fluid flow rate is configured. In some examples, the pump 130 is configured with a second fluid flow rate to the heat exchanger when the fluid temperature in the accumulator tank is above the first temperature range, i.e., the temperature range in Normal Mode operation. The second fluid flow rate may be excess heat dependent. This ensures that hot tap water around 45-47 degrees Celsius is generated also in the case excess heat is stored in the accumulator tank, as may be the case in Charing Mode and Discharging Mode operation, eliminating the risk that the hot tap water becomes too hot. The second side of the external heat exchanger 120 is connected to the hot tap water system 190, providing heated water for domestic use.

[0059] 2.6 First and second three-way valves

[0060] The first three-way valve 135 connected to the return flow of the output from the heat pumps 105a, 105b, the first connection 141 of the accumulator tank, and the return flow from the space heating system, wherein the first three-way valve 135 controls the flow of heat to the accumulator tank 110 or to the space heating system 180 based on the heating needs of the space heating 180 or hot tap water system 190. A second three-way valve 140 is connected to the forward flow of the output from the heat pumps 105a, 105b, the third connection of the accumulator tank 143, and the forward flow to the space heating system, wherein the second three-way valve 140 controls the flow of heat from the accumulator tank 110 based on the operational mode of the DHA and based on the heating needs of the space heating system 180.

[0061] The first three-way valve 135 and second three-way valve 140 may be various types such as on / off actuated three-way valves or variably actuated three- way valves.

[0062] 3. Method Details

[0063] The method details section provides an in-depth explanation of the various steps involved in configuring the operational temperature ranges in the accumulator tank 110 of the heating arrangementlOO. The method comprises monitoring 210 a trigger signal 150, configuring 220 the operational temperature range of the fluid in the accumulator tank 110 to a first temperature range when the trigger signal 150 indicates a Normal Mode operation (i.e. normal supply of electricity), configuring 230 the operational temperature range of the fluid in the accumulator tank 110 to a second temperature range higher than the first temperature range when the trigger signal 150 indicates a Charging Mode operation (i.e. surplus of electricity), and configuring 240 the operational temperature range of the fluid in the accumulator tank 110 to a third temperature range when the trigger signal 150 indicates a Discharging Mode operation (i.e. deficiency of electricity). In one example, the third temperature range is at least partially overlapping the first temperature range. In another example, the third temperature range is the same as the first temperature range. In yet another example, the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range.

[0064] 3.1 . Monitoring Trigger Signal

[0065] The method involves monitoring 210 a trigger signal 150, which in one example indicates a normal supply (Normal Mode), a surplus (Charging Mode), or a deficiency (Discharging Mode) of electricity in the electric grid 195.

[0066] The trigger signal 150 can be generated based on various factors, such as real-time electricity market prices, availability of excess energy from renewable sources, the difference between the generated power from solar panels and the current demand of electricity in the associated house or apartment, or the level of electricity supply in the electric grid 195 with different thresholds indicating surplus, normal, or deficiency conditions.

[0067] For instance, surplus of electricity may be determined if the market price is 50% below the average market price (over a time period, such as a day, week or month) and deficiency of electricity may be determined if the market price is 50% above the average market price. Other thresholds, such as 75% below and 75% above etc., may also be used. As another example, surplus may be determined if difference between the generated power from solar panels and the current demand of electricity in the associated house or apartment is larger than zero, and deficiency may be determined if the generated power from the solar panels is 0.

[0068] The trigger signal may in another example be generated based on information about frequency balancing the electric grid 195. As an example, in AC electric grids with a nominal frequency of 50 Hz, the frequency should be within (49.8, 50.2) Hz, preferably within (49.9, 50.1 ) Hz. For instance, if the information indicates a need to increase the frequency in the electric grid 195, a deficiency of electricity in the grid is determined, and if the information indicates a need to decrease the frequency in the electric grid, a surplus of electricity in the grid is determined. If no such frequency balancing information is received a normal supply is determined. The frequency balancing information may be received from an electric grid frequency balancing service provider, the DHA is associated with.

[0069] 3.1.1. Purpose and Interaction with Other Steps

[0070] Monitoring the trigger signal 150 allows the controller 125 to determine the appropriate operational mode for the DHA and configure the operational temperature ranges of the fluid in the accumulator tank 110 accordingly. This gives an energy efficient operation of the DHA and also helps to maintain grid stability by balancing the supply and demand of electricity, reducing the risk of blackouts or brownouts.

[0071] 3.2. Configuring Operational Temperature Ranges

[0072] Based on the monitored trigger signal 150, the controller 125 configures the operational temperature ranges of the fluid in the accumulator tank 110.

[0073] 3.2.1. Normal Mode Operation If the trigger signal 150 indicates a Normal Mode operation, the controller 125 configures 220 the operational temperature range of the fluid in the accumulator tank 110 to a first temperature range. This allows the DHA to efficiently meet the heating needs of the space heating system 180 and hot tap water system 190 during normal operation. A typical first temperature range may be between 45-55 degrees Celsius.

[0074] 3.2.2. Charging Mode Operation

[0075] If the trigger signal 150 indicates a Charging Mode operation, the controller 125 configures 230 the operational temperature range of the fluid in the accumulator tank 110 to a second temperature range higher than the first temperature range. Typical second temperature ranges may be between 70-80 or 80-90 degrees Celsius, i.e. the lowest temperature in the second temperature range is preferably higher than the highest temperature in the first temperature range. This allows the DHA to store excess heat during periods of surplus electricity in the grid, which can be used later during periods of higher demand or lower electricity supply.

[0076] 3.2.3. Discharging Mode Operation

[0077] If the trigger signal 150 indicates a Discharging Mode operation, the controller 125 configures 240 the operational temperature range of the fluid in the accumulator tank 110 to a third temperature range, where the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range. A typical third temperature range may be between 40-45 degrees Celsius. Other third temperature range examples may be between 42-52 degrees Celsius, or between 45-55 degree Celsius. This allows the DHA to efficiently utilize the stored heat during periods of deficiency of electricity in the grid, reducing the need for additional electricity consumption.

[0078] 4. Operational Process

[0079] The operational process of the heating arrangement involves different modes of operation, including Normal Mode, Charging Mode, and Discharging Mode. These modes are determined based on the trigger signal 150, which indicates the supply of electricity in the electric grid 195. The operational process ensures efficient use of energy and optimal heating performance for both space heating and hot tap water systems.

[0080] 4.1. Normal Mode Operation

[0081] In one example, when the trigger signal 150 indicates a Normal Mode operation, the controller 125 configures the operational temperature range of the fluid in the accumulator tank 110 to a first temperature range. This first temperature range may be between 45-55 degrees Celsius. Other examples of first temperature ranges may be between 45-50 degrees Celsius or between 55-60 degrees Celsius. During Normal Mode operation, the heat pumps 105a, 105b and the direct electric heater 115 may work together to maintain the temperature within the accumulator tank 110 within the first temperature range.

[0082] The controller 125 monitors the actual accumulator tank fluid temperature 155, hot tap water needs 165, and space heating need 160. Based on these parameters, and the configured operational temperature range the controller 125 enables or disables the one or more heat pumps 105a, 105b and the direct electric heater 115 to maintain the desired temperature within the accumulator tank 110. The first three-way valve 135 control the flow of heat to the accumulator tank 110 or the space heating system 180 based on the heating needs of the space heating or hot tap water system.

[0083] 4.2. Charging Mode Operation

[0084] In some examples, when the trigger signal 150 indicates a Charging Mode operation, the controller 125 configures the operational temperature range of the fluid in the accumulator tank 110 to a second temperature range higher than the first temperature range. This second temperature range may be between 70-80, 70-90 or 80-90 degrees Celsius. During Charging Mode operation, the heat pumps 105a, 105b and the direct electric heater 115 may be enabled and may work together to increase the temperature within the accumulator tank 110 to store excess heat.

[0085] The controller 125 monitors the actual accumulator tank fluid temperature 155 and adjusts the operation of the heat pumps 105a, 105b and the direct electric heater 115 accordingly. The first three-way valve 135 control the flow of heat to the accumulator tank 110 or the space heating system 180 based on the heating needs of the space heating or hot tap water system. Charging Mode operation takes advantage of surplus electricity in the electric grid 195, allowing the DHA to store excess heat in the accumulator tank 110 for later use. This mode of operation helps to reduce cost for the DHA user and increase the DHA overall energy efficiency.

[0086] 4.3. Discharging Mode Operation

[0087] In one example, when the trigger signal 150 indicates a Discharging Mode operation, the controller 125 configures the operational temperature range of the fluid in the accumulator tank 110 to a third temperature range, where the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range. This third temperature range may be between 40-45 degrees Celsius. In another example, the third temperature range is at least partially overlapping the first temperature range. This third temperature range may be between 42-52 degrees Celsius. In yet another example, the third temperature range is the same as the first temperature range. This third temperature may be between 45-55 degree Celsius.

[0088] During Discharging Mode operation, the controller 125 disables the direct electric heater 115 and heat pumps 105a, 105b. The first three-way valve 135 and the second three-way valve 140 control the flow of heat from the accumulator tank 110 to the space heating system 180 based on the heating needs of the space heating system. In some examples, if both the space heating and hot tap water system requires heat, the controller may configure the first three-way valve 135 and the second three-way valve 140 so that excess heat from the accumulator tank 110 can be delivered the space heating and configuring the pump 130 to a second flow rate to generate hot tap water system simultaneously. This has the effect of fulfilling two heating needs simultaneously improving the DHA quality of service for the user.

[0089] In one example the first three-way valve 135 and the second three-way valve 140 may be on / off actuated three-way valves. This has the advantage of being of low complexity and hence a robust valve solution is achieved.

[0090] In second example the second three-way valve 140 may be a variably actuated three-way valve. The first three-way valve 135 may be an on / off actuated three-way valve or a variably actuated three-way valve. This has the advantage in the Discharging Mode operation that one has the possibility to gradually adjust fluid temperature from the accumulator tank 110 into the space heating system 180, giving a smoother operation of the space heating in the Discharging Mode operation.

[0091] Discharging Mode operation allows the DHA to utilize the stored heat in the accumulator tank 110 to meet the heating needs of the space heating system 180 and the hot tap water system 190, reducing the demand for electricity from the electric grid 195 during times of deficiency of electricity. This mode of operation helps to reduce cost for the DHA user and increase the DHA overall energy efficiency.

[0092] 5. Technical Specifications

[0093] The heating arrangement 100 may comprise various technical specifications that contribute to its efficient operation and adaptability to different scenarios and requirements. These technical specifications are described in detail in the following subsections.

[0094] 5.1. Heat Pump Module Dimensions

[0095] In some examples, each heat pump module 105a, 105b may have a height between 25-45 cm, a width between 15-35 cm, and a depth between 45-65 cm. These dimensions allow for the heat pump modules to be easily and replaceable in case of maintenance need, enabling the DHA to be customized according to the specific heating needs of a residential. The compact size of the heat pump modules also allows for easy installation and maintenance, as well as efficient use of space within the DHA 100.

[0096] 5.2. Frequency-Controlled Compressor Power Range

[0097] In one example, the heat pumps 105a, 105b may comprise a frequency- controlled compressor with a power range from 1-6 kW thermal heat, in another example it may have a power range of 0.5-10 kW, in yet another example it may have a power range of 0.25-12 kW. The use of a frequency-controlled compressor allows for precise control of the heat pump operation output power, reducing the need for on-off control of the heat pumps, ensuring optimal performance, reliability, and energy efficiency. By adjusting the compressor’s power output based on the heating needs of the space and the operational mode of the DHA 100, the system can minimize energy consumption and reduce operational costs. 5.3. Accumulator Tank Storage Capacity

[0098] In some examples, the accumulator tank 110 may store 70-200 liters of fluid. This storage capacity allows the DHA to accommodate various heating needs and requirements for residential purposes, providing flexibility in its application. The accumulator tank 110 can store heated fluid at different temperature ranges, depending on the operational mode of the DHA 100, as determined by the controller 125 based on the trigger signal 150. This enables the DHA 100to store excess heat when needed, optimizing the energy efficiency.

[0099] 5.4. Temperature Management

[0100] In some examples, the accumulator tank 110, the external heat exchanger 120, the first three-way valve 135, the second three-way valve 140, and the direct electric heater 115 may manage temperatures up to 90 degrees Celsius.

[0101] The ability to manage high temperatures also contributes to the efficient operation of the DHA, as it allows the system to store and distribute heat based on the operational mode and heating needs. For example, during Charging Mode operation, the controller 125 may configure the operational temperature range of the fluid in the accumulator tank 110 to a higher second temperature range (e.g., 70-80 or 80-90 degrees Celsius) when the trigger signal 150 indicates a surplus of electricity in the electric grid 195. This enables the DHA to store excess heat during periods of surplus electricity, which can then be used during periods of normal or deficient electricity supply.

[0102] Additionally, the ability to manage high temperatures ensures that the components of the DHA 100, such as the accumulator tank 110, the external heat exchanger 120, the first three-way valve 135, the second three-way valve 140, and the direct electric heater 115, are made of heat-resistant materials capable of withstanding temperatures up to 90 degrees Celsius. This ensures the durability and longevity of the DHA components, reducing the need for frequent maintenance or replacement.

[0103] 6. Description of the Embodiments

[0104] In this section, various embodiments of the Domestic Heating Arrangement (DHA) are described in detail, highlighting the different variations in heat pump modules, heat source types, and accumulator tank sizes. These embodiments showcase the versatility and adaptability of the DHA to cater to different heating requirements and preferences.

[0105] 6.1. Variation in Heat Pump Modules

[0106] In one example, the DHA may comprise a single modular heat pump 105a. This configuration may be suitable for smaller residential spaces or for situations where the heating demand is relatively low. The single heat pump module can be easily installed and maintained, providing an efficient and cost-effective heating solution.

[0107] In some examples, the DHA may comprise multiple modular heat pumps 105a, 105b. This configuration allows for increased heating capacity and flexibility, as the heat pumps can be operated individually or in combination, depending on the heating needs of the space. The modular design of the heat pumps enables easy installation, maintenance, and replacement, as well as the possibility to expand the heating capacity by adding more heat pump modules if needed.

[0108] The heat pump modules 105a, 105b may have a height between 25-45 cm, a width between 15-35 cm, and a depth between 45-65 cm. This compact size allows for easy installation and integration into various spaces, without occupying a large footprint.

[0109] 6.2. Variation in Heat Source Types

[0110] In one example, the heat source 170 for the DHA may be an air-based heat source. This type of heat source extracts heat from the ambient air and transfers it to the heat pumps 105a, 105b. Air-based heat sources are generally more accessible and easier to install, as they do not require a connection to a water source.

[0111] In some examples, the heat source 170 may be a water-based heat source. This type of heat source extracts heat from a water source, such as a lake, river, or groundwater, and transfers it to the heat pumps 105a, 105b. Water-based heat sources can provide higher efficiency and more stable heating performance, especially in colder climates where the temperature of the water source remains relatively constant.

[0112] 6.3. Variation in Accumulator Tank Sizes The accumulator tank 110 in the DHA may have different storage capacities to accommodate various heating demands and preferences. In one example, the accumulator tank 110 may store 70 liters of fluid, which may be suitable for smaller residential spaces or for situations where the heating demand is relatively low.

[0113] In some examples, the accumulator tank 110 may store up to 200 liters of fluid, providing a larger storage capacity for increased heating needs. This larger accumulator tank size may be more suitable for larger residential spaces or commercial applications, where the heating demand is higher.

[0114] The accumulator tank 110 is designed to accommodate temperatures up to 90 degrees Celsius, ensuring the DHA can act as a thermal battery storing excess heat. The different connections and specifications of the accumulator tank 110, such as the first connection 141 , second connection 142, and third connection 143, allow for versatile and adaptable operation, catering to various heating needs and preferences.

[0115] In conclusion, the various embodiments of the Domestic Heating Arrangement (DHA) 100 described in this section showcase the versatility and adaptability of the disclosure to cater to different heating requirements and preferences. The modular design of the heat pumps, the variation in heat source types, and the different accumulator tank sizes allow for a customizable and efficient heating solution that can be easily installed, maintained, and expanded as needed.

[0116] 7. Potential Applications

[0117] The Domestic Heating Arrangement (DHA) 100 has various potential applications in different settings and scenarios. This section provides a detailed description of some of these potential applications, highlighting the advantages of the features of the DHA and how they can be utilized in different situations.

[0118] 7.1. Residential Heating Systems

[0119] In one example, the DHA may be used in residential heating systems, providing both space heating and hot tap water for houses or apartments. The modular heat pumps 105a, 105b can be easily installed and connected to a heat source 170, such as an air or water-based heat source, depending on the specific requirements of the residential setting. The accumulator tank 110, with a storage capacity of 70-200 liters of fluid, can store heated fluid at different temperature ranges depending on the operational mode determined by the controller 125 based on the trigger signal 150.

[0120] The DHA may comprise an external heat exchanger 120, which has a first side connected to the accumulator tank 110 and a second side connected to a hot tap water system 190. This allows for efficient heat transfer between the accumulator tank 110 and the hot tap water system 190, providing hot tap water at the desired temperature range.

[0121] The controller 125 may be configured to control the operation of the DHA based on the trigger signal 150, which indicates a normal supply (Normal Mode), a surplus (Charging Mode), or a deficiency (Discharging Mode) of electricity in the electric grid 195. This allows for efficient use of the electricity in the electric grid 195.

[0122] 7.2. Integration with Renewable Energy Sources

[0123] In some examples, the DHA may be directly connected to renewable energy sources such as solar or wind power. The trigger signal 150 could be generated based on the availability of excess energy from these sources, allowing the DHA to adjust its operational mode accordingly. This integration with renewable energy sources can help reduce the overall carbon footprint of the heating system and contribute to a more sustainable energy consumption pattern.

[0124] When the DHA is connected to renewable energy sources, the controller 125 may configure the operational temperature ranges of the fluid in the accumulator tank 110 based on the trigger signal 150, which indicates the availability of excess energy from the renewable sources. In Normal Mode operation, the controller 125 may configure the operational temperature range of the fluid in the accumulator tank 110 to a first temperature range, while in Charging Mode operation, the controller 125 may configure the operational temperature range of the fluid in the accumulator tank 110 to a second temperature range higher than the first temperature range, and the accumulator act as a thermal battery. In Discharging Mode operation, the controller 125 may configure the operational temperature range of the fluid in the accumulator tank 110 to a third temperature range, where the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range.

[0125] 7.3. Variation in Heat Pump Modules The DHA may comprise one or more modular heat pumps 105a, 105b, which can be easily installed and connected to a heat source 170 on the input side and powered by an electric grid 195. Each heat pump module may have a height between 25-45 cm, a width between 15-35 cm, and a depth between 45-65 cm, making them suitable for various installation spaces and requirements.

[0126] The heat pumps 105a, 105b may comprise a frequency-controlled compressor with a power range from 1-6 kW thermal heat, allowing for efficient and flexible operation depending on the heating needs of the space heating or hot tap water system.

[0127] 7.4. Variation in Heat Source Types

[0128] The DHA may be connected to different types of heat sources 170, such as air or water-based heat sources, depending on the specific requirements of the application. This flexibility in heat source types allows the DHA to be adaptable to various settings and scenarios, providing efficient heating solutions for different environments.

[0129] 7.5. Variation in Accumulator Tank Sizes

[0130] The accumulator tank 110 may have different storage capacities, ranging from 70-200 liters of fluid, depending on the specific requirements of the application. This variation in accumulator tank sizes allows the DHA to be adaptable to different heating needs and scenarios, providing efficient heating solutions for various settings.

[0131] The accumulator tank 110, the external heat exchanger 120, the first three- way valve 135, the second three-way valve 140, and the direct electric heater 115 may be designed to manage temperatures up to 90 degrees Celsius, ensuring safe and efficient operation of the DHA in various applications.

[0132] 8. List of examples

[0133] Example 1 : A heating arrangement comprising: one or more modular heat pumps connected to a heat source and powered by an electric grid; an accumulator tank connected to the heat pumps; a direct electric heater located within the accumulator tank and powered by the electric grid; an external heat exchanger connected to the accumulator tank and connected to a hot tap water system; and a controller configured to control the operation of the heating arrangement and to configure operational temperature ranges of a fluid in the accumulator tank based on a trigger signal indicating a normal supply (Normal Mode), a surplus (Charging Mode) or a deficiency (Discharging Mode) of electricity in the electric grid, wherein the controller is configured to: configure the operational temperature range of the fluid in the accumulator tank to a first temperature range when the trigger signal indicates a Normal Mode operation, configure the operational temperature range of the fluid in the accumulator tank to a second temperature range higher than the first temperature range when the trigger signal indicates a Charging Mode operation, configure the operational temperature range of the fluid in the accumulator tank to a third temperature range, where the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range, when the trigger signal indicates a Discharging Mode operation.

[0134] Example 2: The heating arrangement of Example 1 , further comprising a space heating system connected to the output of the heat pumps, wherein the controller controls the operation of the space heating system based on a space heating need.

[0135] Example 3: The heating arrangement of Example 2, further comprising a first three-way valve connected to the return flow of the output from the heat pumps, the first connection of the accumulator tank, and the return flow from the space heating system, wherein the first three-way valve controls the flow of heat to the accumulator tank or to the space heating system based on the heating needs of the space heating or hot tap water system, and a second three-way valve connected to the forward flow of the output from the heat pumps, the third connection of the accumulator tank, and the forward flow to the space heating system, wherein the second three-way valve controls the flow of heat from the accumulator tank based on the operational mode of the heating arrangement and based on the heating needs of the space heating system.

[0136] Example 4: The heating arrangement of Example 3, and if the operational mode of the heating arrangement is in Discharging Mode and the space heating system requires heat, the first three-way valve and the second three-way valve directs the flow of heat from the accumulator tank to the space heating system.

[0137] Example 5: The heating arrangement of any of Examples 1 to 4, and if the operational mode of the heating arrangement is in Discharging Mode, the controller disables the direct electric heater and the one or more heat pumps.

[0138] Example 6: The heating arrangement of any of Examples 1 to 5, wherein the trigger signal is generated based on at least one of real-time electricity market prices, availability of excess energy from renewable sources, the difference between the generated power from solar panels and the current demand of electricity in the associated house or apartment, or the level of electricity supply in the electric grid with different thresholds indicating surplus, normal, or deficiency conditions.

[0139] Example 7: The heating arrangement of any of Examples 1 to 5, wherein the trigger signal is generated based on information about frequency balancing the electric grid, wherein if the information indicates a need to increase the frequency in the electric grid, Discharging Mode operation is determined, and if the information indicates a need to decrease the frequency in the electric grid, Charging Mode operation is determined.

[0140] Example 8: The heating arrangement of any of Examples 1 to 7, wherein the heat source is an air or water-based heat source.

[0141] Example 9: The heating arrangement of any of Examples 1 to 8, wherein each heat pump module has a height between 25-45 cm, a width between 15-35 cm, and a depth between 45-65 cm. Example 10: The heating arrangement of any of Examples 1 to 9, wherein the heat pumps comprise a frequency-controlled compressor with a power range from 1-6 kW thermal heat.

[0142] Example 11 : The heating arrangement of any of Examples 1 to 10, wherein the accumulator tank stores 70-200 liters of fluid.

[0143] Example 12: The heating arrangement of any of Examples 1 to 11 , wherein the accumulator tank, the external heat exchanger, the first three-way valve, the second three-way valve, and the direct electric heater manage temperatures up to 90 degrees Celsius.

[0144] Example 13: A method for configuring an operational temperature range in an accumulator tank of a heating arrangement according to any of Examples 1 to 12, the method comprising: monitoring a trigger signal indicating a normal supply (Normal Mode), a surplus (Charging Mode) or a deficiency (Discharging Mode) of electricity in the electric grid ; configuring the operational temperature range of the fluid in the accumulator tank to a first temperature range when the trigger signal indicates a Normal Mode operation; configuring the operational temperature range of the fluid in the accumulator tank to a second temperature range higher than the first temperature range when the trigger signal indicates a Charging Mode operation; and configuring the operational temperature range of the fluid in the accumulator tank to a third temperature range, where the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range, when the trigger signal indicates a Discharging Mode operation.

[0145] Example 14: The method according to Example 13, wherein the first temperature range is between 45-55 degrees Celsius, the second temperature range is between 70-80 or 80-90 degrees Celsius, and the third temperature range is between 40-45 degrees Celsius. The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms “comprises,” “comprising,” “includes,” and / or “including” when used herein specify the presence of stated features, integers, actions, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, components, and / or groups thereof.

[0146] It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

[0147] Relative terms such as “below” or “above” or “upper” or “lower” or “horizontal” or “vertical” may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present.

[0148] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0149] It is to be understood that the present disclosure is not limited to the aspects described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the disclosure being set forth in the following claims.

Claims

Claims1. A heating arrangement (100) comprising: one or more modular heat pumps (105a, 105b) connected to a heat source (170) and powered by an electric grid (195); an accumulator tank (110) connected to the one or more modular heat pumps (105a, 105b); a direct electric heater (115) located within the accumulator tank (110) and powered by the electric grid (195); an external heat exchanger (120) connected to the accumulator tank (110) and connected to a hot tap water system (190); and a controller (125) configured to control the operation of the heating arrangement (100) and to configure operational temperature ranges of a fluid in the accumulator tank (110) based on a trigger signal (150) indicating a normal supply, a surplus, or a deficiency of electricity in the electric grid (195), wherein the controller (125) is configured to: configure the operational temperature range of the fluid in the accumulator tank (110) to a first temperature range when the trigger signal (150) indicates the normal supply of electricity, configure the operational temperature range of the fluid in the accumulator tank (110) to a second temperature range higher than the first temperature range when the trigger signal (150) indicates the surplus of electricity, and configure the operational temperature range of the fluid in the accumulator tank (110) to a third temperature range, wherein the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range, when the trigger signal (150) indicates the deficiency of electricity.

2. The heating arrangement (100) according to claim 1 , further comprising a space heating system (180) connected to the output of the one or more modular heat pumps (105a, 105b), wherein the controller (125) controls the operation of the space heating system (180) based on a space heating need (160).

3. The heating arrangement (100) according to claim 2, further comprising a first three-way valve (135) connected to a return flow of the output from the one or more modular heat pumps (105a, 105b), the first connection (141 ) of the accumulator tank (110), and the return flow from the space heating system (180), wherein the first three-way valve (135) is configured to control a flow of heat to the accumulator tank (110) or to the space heating system (180) based on space heating need (160)or on a heating need of the hot tap water system, and a second three-way valve (140) connected to a forward flow of the output from the one or more modular heat pumps (105a, 105b), the third connection (143) of the accumulator tank (110), and a forward flow to the space heating system (180), wherein the second three-way valve (140) is configured to control a flow of heat from the accumulator tank (110) based on the operational mode of the heating arrangement (100) and based on the space heating need (160).

4. The heating arrangement (100) according to claim 3, and if the trigger signal indicates the deficiency of electricity and the space heating system (180) requires heat, the first three-way valve (135) and the second three-way valve (140) are configured to direct the flow of heat from the accumulator tank (110) to the space heating system (180).

5. The heating arrangement (100) according to any of claims 1 to 4, and if the trigger signal indicates the deficiency of electricity, the controller (125) is configured to disable the direct electric heater (115) and the one or more modular heat pumps (105a, 105b).

6. The heating arrangement (100) according to any of claims 1 to 5, wherein the trigger signal (150) is generated based on at least one of: real-time electricity market prices, availability of excess energy from renewable sources, a difference between a generated power from solar panels and a current demand of electricity in the associated house or apartment, or a level of electricity supply in the electric grid (195) with different thresholds indicating surplus, normal, or deficiency conditions.

7. The heating arrangement (100) according to any of claims 1 to 5, wherein the trigger signal (150) is generated based on information about frequency balancing the electric grid (195), wherein, if the information indicates a need to increase the frequency in the electric grid (195), the trigger signal indicates the deficiency of electricity, and if the information indicates a need to decrease the frequency in the electric grid (195), the trigger signal indicates the surplus of electricity.

8. The heating arrangement (100) according to any of claims 1 to 7, wherein the heat source (170) is an air or water-based heat source.

9. The heating arrangement (100) according to any of claims 1 to 8, wherein each modular heat pump (105a, 105b) has a height between 25-45 cm, a width between 15-35 cm, and a depth between 45-65 cm.

10. The heating arrangement (100) according to any of claims 1 to 9, wherein the one or more modular heat pumps (105a, 105b) comprise a frequency-controlled compressor with a power range from 1-6 kW thermal heat.11 . The heating arrangement (100) according to any of claims 1 to 10, wherein the accumulator tank (110) stores 70-200 liters of fluid.

12. The heating arrangement (100) according to any of claims 3 to 11 , when depending on claim 3, wherein the accumulator tank (110), the external heat exchanger (120), the first three-way valve (135), the second three-way valve (140) and the direct electric heater (115) are each structured and configured to manage temperatures up to 90 degrees Celsius.

13. The heating arrangement (100) according to any one of the preceding claims, wherein the first temperature range is between 45-55 degrees Celsius, the second temperature range is between 70-80 or 80-90 degrees Celsius, and the third temperature range is between 40-45 degrees Celsius.

14. A method for configuring an operational temperature range in an accumulator tank (110) of a heating arrangement (100) according to any one of claims 1 to 13, the method comprising: monitoring (210) a trigger signal (150) indicating a normal supply, a surplus or a deficiency of electricity in an electric grid (195); configuring (220) an operational temperature range of a fluid in the accumulator tank (110) to a first temperature range when the trigger signal (150) indicates the normal supply of electricity; configuring (230) the operational temperature range of the fluid in the accumulator tank (110) to a second temperature range higher than the first temperature range when the trigger signal (150) indicates the surplus of electricity; and configuring (240) the operational temperature range of the fluid in the accumulator tank (110) to a third temperature range, wherein the lowest temperature in the third temperature range is lower than the lowest temperature in the first temperature range, when the trigger signal (150) indicates the deficiency of electricity.

15. The method according to claim 14, wherein the first temperature range is between 45-55 degrees Celsius, the second temperature range is between 70-80 or 80-90 degrees Celsius, and the third temperature range is between 40-45 degrees Celsius.

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