PROCEDURE FOR THE OPERATION OF A HEATING COST ALLOCATION DEVICE AND HEATING COST ALLOCATION DEVICE

Abstract

The invention relates to a method for operating a heat cost allocator (1), wherein a volume flow rate (m), a supply temperature (Tv), and a return temperature (TR) of a heat transfer medium flowing through the radiator (3), as well as a room temperature (TL), are determined as parameters of a first parameter group, and from at least one parameter of this first parameter group, the following parameters are derived as parameters of a second parameter group: a surface temperature (To) of the radiator (3) at a predetermined relative height (h%) on the radiator (3), a logarithmic excess temperature (ΔTln) of the radiator (3), a radiator exponent (n) of the radiator (3), a reference output (QR) of the radiator (3), and at least one consumption value (Q1, Q2, Q3) corresponding to a quantity of heat emitted by the radiator (3). The invention further relates to a heat cost allocator (1).

Description

[0001] The invention relates to a method for operating a heat cost allocation device and a heat cost allocation device.

[0002] From DE 10 2016 104 225 A1, a heat cost allocator and a method for measuring the amount of heat emitted by a radiator are known. The measurement of the amount of heat emitted by a radiator is based on a measured flow temperature and a measured radiator temperature of the heat transfer medium at the radiator. The valve stroke of a radiator control valve is determined, and the amount of heat emitted is calculated from the values ​​of valve stroke position, flow temperature, and radiator temperature using an optionally preset operating characteristic of the radiator control valve and a differential pressure of the heat transfer medium across the radiator control valve known at the operating point. The optionally preset operating characteristic establishes the relationship between the stroke position and the volume flow rate at the known differential pressure.

[0003] The invention is based on the objective of providing a method for operating a heat cost allocation device that is improved compared to the prior art, and a heat cost allocation device that is improved compared to the prior art.

[0004] The problem is solved according to the invention by a method for operating a heat cost allocation device with the features of claim 1 and a heat cost allocation device with the features of claim 8.

[0005] Advantageous embodiments of the invention are the subject of the dependent claims.

[0006] In a method according to the invention for operating a heat cost allocator, a volume flow rate m, a supply temperature Tv, and a return temperature TR of a heat transfer medium flowing through the radiator, as well as a room temperature TL, i.e., the ambient air temperature of a room in which the radiator is located, are determined. These parameters form a first parameter group, i.e., they are a component thereof.

[0007] The volume flow rate m is determined, for example, by means of a volume flow sensor of the heat cost allocator, in particular by measurement. Alternatively or additionally, the heat cost allocator, in particular a supply assembly of the heat cost allocator, can have, for example, a radiator valve with a constant volume flow rate m, which is, in particular, adjustable. This constant volume flow rate m is then known, for example, due to a preset constant volume flow rate m when the radiator valve is installed on the radiator. For the method described here, this known constant volume flow rate m is then used, whereby the constant volume flow rate m, i.e., its current state, is then further determined, for example, based on the supply temperature or on an opening sensor on the radiator valve.

[0008] The flow temperature Tv of the heat transfer medium flowing through the radiator is determined, in particular measured, by means of a flow temperature sensor of the heat cost allocator.

[0009] The return temperature TR of the heat transfer medium flowing through the radiator is determined, in particular measured, by means of a return temperature sensor of the heat cost allocator.

[0010] The room temperature TL, i.e. the room air temperature of the room in which the radiator is located, is determined, in particular measured, by means of a room temperature sensor of the heat cost allocator.

[0011] From at least one parameter of the above-mentioned parameters, i.e., from at least one of the parameters of the first parameter group mentioned above, or from several or all parameters of the first parameter group mentioned above, A surface temperature To of the radiator at a given relative height h% on the radiator, a logarithmic temperature difference ΔT ln of the radiator, a radiator exponent n of the radiator, a reference power QR of the radiator, and at least one consumption value Q1, Q2, Q3 corresponding to a quantity of heat emitted by the radiator are derived. These parameters, each derived from at least one of the parameters of the first parameter group, form a second parameter group.

[0012] Thus, the parameters of the first parameter group are each determined, in particular measured, whereby for the parameter volume flow m, as described above, it may be provided, for example, that this parameter is also measured, in particular by means of the volume flow sensor, or that, in particular when using the radiator valve with, in particular adjustable, constant volume flow m, this then known constant volume flow m is used, whereby the constant volume flow m, i.e. its current presence, is then determined.

[0013] The parameters of the second parameter group are, as described, each derived from at least one of the parameters of the first parameter group. They are each calculated, in particular, using at least one parameter from the first parameter group.

[0014] The specified relative height h% refers to a relative height value on the respective radiator, depending on and in relation to its overall height. Specifically, the specified relative height h% on the radiator is a height position at which the surface temperature To can be measured as a good approximation of the radiator's average surface temperature. Therefore, conventional heat cost allocators, particularly those conforming to EN 834:2013 + AC:2015 (D), are mounted at this specified relative height h% on the radiator. The specified relative height h% on the respective radiator is determined by the heat cost allocator manufacturer's installation instructions. For example, the specified relative height might be 50% or 75% of the radiator's overall height.

[0015] A heat cost allocator according to the invention, operable or operated by means of this method, comprises a flow assembly, which can be arranged or is arranged on a flow pipe of a radiator, with a flow temperature sensor and, in particular, with a communication device; a return assembly, which can be arranged or is arranged on a return pipe of the radiator, with a return temperature sensor and, in particular, with a communication device; at least one room temperature sensor; and at least one computing unit. The heat cost allocator also comprises at least one volume flow sensor arranged in the flow assembly or return assembly, or, alternatively or additionally, a radiator valve with a constant volume flow, in particular adjustable, m, expediently arranged in the flow assembly. The volume flow sensor is in particular designed and configured for determining, in particular measuring, the volume flow m.

[0016] The flow temperature sensor is specifically designed and configured to determine, in particular measure, the flow temperature Tv.

[0017] The return temperature sensor is specifically designed and configured for determining, in particular measuring, the return temperature TR.

[0018] The room temperature sensor is specifically designed and configured for determining, in particular measuring, the room temperature TL.

[0019] The at least one arithmetic unit is specifically designed and configured to determine, and in particular calculate, at least one parameter of the second parameter group using at least one parameter, or several or all parameters, of the first parameter group. Specifically, the at least one arithmetic unit is configured to determine, and in particular calculate, several or all parameters of the second parameter group using at least one parameter, or several or all parameters, of the first parameter group. For this purpose, the at least one parameter, or the several or all parameters of the first parameter group, are transferred to the arithmetic unit and processed by it to determine, and in particular calculate, the at least one parameter, or several or all parameters, of the second parameter group.

[0020] If multiple processing units are present, the necessary calculations are distributed across them, for example, to save energy in the supply unit. The result of calculating the radiator's reference output is only needed in the processing unit that also calculates the weighted consumption value, and therefore, it is advantageous for the reference output to be calculated only in that unit. With multiple processing units, it is therefore particularly important that these units are configured and designed to determine all parameters of the second parameter group using at least one parameter from the first parameter group. Specifically, it is intended that each parameter of the second parameter group is determined using only one of the multiple processing units.Alternatively, it may be provided, for example, that at least one, several or all parameters of the second parameter group are determined using several or all arithmetic units, for example for redundancy reasons.

[0021] The at least one processing unit can be arranged in the inlet assembly, the radiator surface assembly, the third assembly, or the fourth assembly. Another embodiment provides that several of the assemblies, or each assembly, in particular the inlet assembly, the radiator surface assembly, the third assembly, and / or the fourth assembly, each comprise an associated processing unit. In this further embodiment, the multiple processing units communicate with each other, for example, wirelessly (e.g., via radio or Bluetooth) or via a wired connection.

[0022] The communication device of the feeder module is specifically designed and equipped for communication with the return module and / or a third module and / or a fourth module.

[0023] The communication device of the return module is specifically designed and equipped for communication with the forward module and / or the third module and / or the fourth module.

[0024] The at least one room temperature sensor and the at least one computing unit are advantageously arranged in the flow assembly, the return assembly, or, if present in the heat cost allocator, in a third assembly described in more detail below. The at least one computing unit can also be arranged, for example, in a fourth assembly described in more detail below, if present in the heat cost allocator. However, at least one room temperature sensor and at least one computing unit must be present and arranged in one of these assemblies of the heat cost allocator. The heat cost allocator may also include one or more additional room temperature sensors and / or one or more additional computing units.The at least one additional room temperature sensor is then located, for example, in the flow assembly, the return assembly, or the third assembly if present in the heat cost allocator. The at least one additional processing unit is then located, for example, in the flow assembly, the return assembly, the third assembly if present in the heat cost allocator, or the fourth assembly if present in the heat cost allocator. Advantageously, each of the aforementioned assemblies contains a maximum of only one room temperature sensor and / or a maximum of only one processing unit. It may be advantageous, for example, to locate the room temperature sensor alone or additionally in the third assembly, which is located in the room with the radiator but is thermally decoupled from it.An arrangement of the sensor only in the third assembly has the advantage that the room temperature measurement there cannot be distorted by the heat output of the radiator. Alternatively, the room temperature sensor in the third assembly can be provided, for example, in addition to a room temperature sensor in the flow assembly and / or the return assembly. Such an additional room temperature sensor in the third assembly allows for verification of the plausibility of the measurement results from the room temperature sensors in the flow assembly and / or the return assembly. Thus, the flow assembly, the return assembly, and the third assembly, if present in the heat cost allocator, optionally have a room temperature sensor, whereby at least one of these assemblies of the heat cost allocator must have a room temperature sensor.Furthermore, the supply assembly, the return assembly, the third assembly (if present in the heat cost allocator), and the fourth assembly (if present in the heat cost allocator) optionally include a calculation unit, whereby at least one of these assemblies must include a calculation unit. All existing assemblies of the heat cost allocator can therefore optionally include a calculation unit. For example, all existing assemblies, especially the third and / or fourth assembly (if present), include a calculation unit to avoid more complex calculations in the supply assembly and / or the return assembly.

[0025] The heat cost allocator also includes at least one electrical power supply. For example, several or all modules may each have their own electrical power supply. It is also possible for several or all modules to share a common electrical power supply. The electrical power supply, or the respective electrical power supply of the individual modules or modules, may include, for example, a battery, which may also be a rechargeable accumulator, and / or a mains connection to an electrical power supply network.

[0026] The option described above of using room temperature sensors in multiple modules of the heat cost allocator allows, for example, improved redundancy through these multiple room temperature sensors and the possibility of verifying the plausibility of the measured values. The option described above of using processing units in several or all modules of the heat cost allocator also offers the advantage of redundancy and additionally allows calculations to be distributed across different processing units. If one of the processing units involved is located in a module with mains power, then, for example, shifting the processing power to this module can relieve the energy budgets of the other modules, such as those powered by batteries.

[0027] The components of the flow assembly are advantageously arranged, or can be arranged, on and / or in the flow pipe. The flow pipe of the radiator is a pipe for the heat transfer medium, leading exclusively to that radiator. The components of the flow assembly are advantageously arranged directly on and / or in the flow pipe of the radiator. Accordingly, the flow temperature Tv is also measured at this position, advantageously directly on the radiator, in the flow pipe.

[0028] The components of the return line assembly are advantageously arranged, or can be arranged, on and / or in the return line. The radiator's return line is a line for the heat transfer medium, leading exclusively away from the radiator. The components of the return line assembly are advantageously arranged directly on and / or in the return line at the radiator. Accordingly, the return temperature (TR) is also measured at this position, advantageously directly at the radiator, in the return line.

[0029] The flow pipe of the radiator is a pipe for the heat transfer medium, which leads exclusively to this radiator, and the return pipe of the radiator is a pipe for the heat transfer medium, which leads exclusively away from this radiator.

[0030] The flow temperature sensor determines, in particular measures, the flow temperature Tv of the heat transfer medium flowing through the radiator. The return temperature sensor determines, in particular measures, the return temperature TR of the heat transfer medium flowing through the radiator.

[0031] The volume flow rate (m) of the heat transfer medium flowing through the radiator is determined by means of the volume flow sensor, if one is present. Alternatively or additionally, the volume flow sensor can be located in the return line assembly, where the volume flow rate (m) of the heat transfer medium flowing through the radiator is determined. Alternatively, the radiator valve with a known constant volume flow rate (m) can be located, particularly in the supply line assembly, and this known constant volume flow rate (m) is then used in the process. The room temperature (TL) of the room in the building where the radiator is located is determined, and in particular measured, by means of the room temperature sensor.The communication devices serve primarily to transmit sensor values ​​determined by the respective sensor to the processing unit. In the processing unit, the other parameters mentioned above are determined, and in particular calculated, from the described, determined sensor values, especially the measured ones.

[0032] In one possible embodiment of the heat cost allocator, the supply assembly is designed as a radiator valve with a thermostatic head, configured with a constant flow rate or for proportional operation, in which there is a direct proportionality between the valve stroke of the radiator valve and the flow rate m through the radiator valve. Alternatively, the supply assembly may include such a radiator valve with a thermostatic head. In this case, the flow rate m is known or can be determined in a particularly simple manner by measuring the respective valve stroke. Even when using the radiator valve with a constant flow rate m, it is advantageous to determine the flow rate m for the method, as described above.

[0033] In one possible embodiment of the heat cost allocator, the supply assembly and the return assembly each comprise a volume flow sensor, which is specifically designed and configured to determine, in particular measure, the volume flow m. This achieves, for example, redundancy with regard to volume flow determination.

[0034] In another possible embodiment of the heat cost allocator, no flow sensor is present, particularly if a radiator valve with a known, constant flow rate m is already arranged on the radiator. This is then advantageously a component of the supply assembly.

[0035] In one possible embodiment, the heat cost allocator comprises the third assembly, already mentioned above, which is spaced apart from the radiator. This third assembly includes, in particular, a further communication device, which is specifically designed and configured for communication with the flow assembly and / or the return assembly and / or the fourth assembly. The third assembly can be arranged, or is arranged, in the same room of the building as the radiator, i.e., it is intended for arrangement in the same room as the radiator. The at least one room temperature sensor, or a further room temperature sensor, which is designed and configured for determining, in particular measuring, the room temperature, can be arranged in this third assembly.The at least one arithmetic unit, or at least one further arithmetic unit, which is designed and configured to determine, in particular calculate, at least one parameter of the second parameter group using at least one parameter or several or all parameters of the first parameter group, and in particular to determine, in particular calculate, several or all parameters of the second parameter group using at least one parameter or several or all parameters of the first parameter group, can be arranged in this third assembly. The at least one parameter or the several or all parameters of the first parameter group are then transferred to the at least one arithmetic unit and / or to the at least one further arithmetic unit and processed with it in order to determine, in particular calculate, the at least one parameter or several or all parameters of the second parameter group.

[0036] In one possible embodiment, the heat cost allocator comprises the fourth assembly, already mentioned above, which is spaced apart from the radiator, and in particular includes a further communication device, which is specifically designed and configured for communication with the flow assembly and / or the return assembly and / or the third assembly, wherein the fourth assembly can be arranged or is arranged outside the room in which the radiator is located. The at least one computing unit or at least one further computing unit, which is designed and configured for determining, in particular calculating, at least one parameter of the second parameter group using at least one parameter or several or all parameters of the first parameter group, in particular for determining, in particular calculating,Several or all parameters of the second parameter group, each determined by means of at least one parameter or several or all parameters of the first parameter group, can be arranged in this fourth assembly. The at least one parameter or the several or all parameters of the first parameter group are then transferred to the at least one arithmetic unit and / or to the at least one further arithmetic unit and processed with it in order to determine, in particular to calculate, the at least one parameter or several or all parameters of the second parameter group.

[0037] In one possible embodiment of the heat cost allocation device, the at least one room temperature sensor or at least one further room temperature sensor, which is designed and configured to determine, in particular measure, the room temperature TL, is arranged in the flow assembly, in the return assembly or in the third assembly.

[0038] In one possible embodiment of the heat cost allocation device, the calculating unit or at least one further calculating unit, which is designed and configured for determining, in particular calculating, at least one parameter of the second parameter group by means of at least one parameter or several or all parameters of the first parameter group, in particular for determining, in particular calculating, several or all parameters of the second parameter group each by means of at least one parameter or several or all parameters of the first parameter group, is arranged in the flow assembly, in the return assembly, in the third assembly or in the fourth assembly.The at least one parameter, or several or all parameters of the first parameter group are then transferred to the at least one processing unit and / or to the at least one further processing unit and processed by it in order to determine, in particular to calculate, the at least one parameter, or several or all parameters of the second parameter group. If several processing units are present, the necessary calculations are performed distributed across the individual processing units, for example, to save energy in the flow assembly and / or in the return assembly. The result of the calculation of the radiator's reference output is, for example, only needed in the processing unit in which the weighted consumption value is also calculated; therefore, it is advantageous to calculate the reference output only in this processing unit.

[0039] As already mentioned, each component of the heat cost allocator should ideally have its own power supply. This can preferably be a battery and / or an energy harvesting device. In principle, it is also conceivable to equip one, several, or all components with a mains power supply. The energy harvesting device can, for example, also be designed to power several or all components simultaneously.

[0040] Heat cost allocators, and in particular the heat cost allocator described here, are measuring devices for measuring the amount of heat emitted by a radiator. There are two basic operating principles.

[0041] One operating principle is based on measurements of the flow temperature Tv and the return temperatures TR, as well as the volume flow rate m of the heat transfer medium flowing through the radiator, and integration over time t. Measuring the volume flow rate m is only necessary if a radiator valve with a constant volume flow rate m is not used. If such a radiator valve with a constant volume flow rate m is used, then the known constant volume flow rate m is used for the method, as already mentioned above. The heat quantity, or the consumption value Q1 corresponding to the heat quantity emitted by the radiator, is then: Q 1 = c ∫ m T V − T R dt

[0042] Here, c is the specific heat capacity of the heat transfer medium. This approach is the principle behind a heat meter. These meters can measure the amount of heat consumed very accurately. However, they are relatively expensive and their installation is comparatively complex.

[0043] Another operating principle is based on determining the excess temperature, i.e., the temperature difference between surface temperature To and room temperature TL. For this purpose, the heat cost allocator is mounted on the radiator at a predetermined relative height h%, where the surface temperature To can be measured as a good approximation of the radiator's average surface temperature. The surface temperature To of the radiator at the predetermined relative height h% is therefore measured directly or calculated from the flow temperature Tv and return temperature TR. The temperature difference between surface temperature To and measured room temperature TL, i.e., the excess temperature of the radiator, is raised to the power of the radiator exponent n and integrated over time t. The heat quantity, or the consumption value Q2 corresponding to the heat quantity emitted by the radiator, is then: Q 2 = K ∫ T o − T L n dt

[0044] In formula (2), K is a correction factor. With previously known heat cost allocators, this procedure directly measures both the surface temperature To of the radiator at the specified relative height h% on the radiator and the room temperature TL.

[0045] An alternative calculation of the heat quantity to formula (2) consists of calculating the logarithmic excess temperature ΔT ln from the flow temperature Tv, the return temperature TR and the room temperature TL: ΔT ln = T V − T R ln T V − T V T R − T L and to integrate this logarithmic excess temperature ΔT ln , raised to the power of the radiator exponent n, over time and multiply it by the correction factor K: Q 3 = K ∫ ΔT ln n dt

[0046] The correction factor K mentioned above comprises a scaling factor and at least the correction values ​​Kc-value and KQ-value. The Kc-value corrects for differing thermal couplings of the temperature sensors in the heat cost allocator, particularly the flow, return, and room temperature sensors. The KQ-value scales for different nominal outputs of radiators.

[0047] Compact devices of the second operating principle, designed for mounting on the radiator surface, are colloquially known as heat cost allocators or compact heat cost allocators. These devices are relatively inexpensive, easy to install, and therefore widely used.

[0048] A disadvantage of these devices is that correct operation requires identification of the respective radiator in order to assign its reference output (QR) and thermal coupling factors, particularly c-values. This reference output (QR) is determined in a laboratory measurement during a radiator type test. The thermal coupling factors are measured in laboratory tests of both the radiator and the heat cost allocator and stored in heat cost allocator manufacturer databases. With over 40,000 different radiators, correctly identifying each one and thus accurately assigning the reference output (QR) and thermal coupling factors is by no means trivial and can ultimately lead to very large measurement errors.

[0049] Another disadvantage of this principle is that it only provides accurate results for large heat transfer fluid flows, i.e., only for large volume flows (m). However, due to cost optimization and the excellent insulation of modern houses, modern heating systems operate at small heat transfer fluid flows, i.e., small volume flows (m).

[0050] Another disadvantage of compact heat cost allocators is their mounting on the radiator. Many radiators are now design elements, and a heat cost allocator is considered visually intrusive by many.

[0051] These heat cost allocators are tested and approved for heat cost allocation according to EN 834:2013 + AC:2015 (D). It is doubtful whether there is currently a single heat cost allocator that can literally fulfill requirement 8.1 of this EN 834:2013 + AC:2015 (D). "The assessment using KQ must be based on the actually installed radiator."

[0052] The rating factor KQ, i.e., the KQ value derived from the reference output of the installed radiator, is currently determined based on a type test of an individual radiator in the laboratory. The rating factor KQ typically corresponds to the ratio of the standard heat output of the radiator being evaluated to the standard heat output of a base radiator (e.g., 1000 watts). Thus, the reading on a radiator with a standard heat output of 1000 watts is rated with a KQ factor of 1.0. A standard heat output of 1386 watts results in a KQ of 1.39. Therefore, unavoidable individual variations, particularly in radiators produced over decades, sometimes in different factories, cannot be taken into account. Aging and installation effects are also disregarded.

[0053] The solution according to the invention overcomes these disadvantages and also enables the approval of this heat cost allocator according to EN 834:2013 + AC:2015 (D), since advantageously at least one consumption value Q2 corresponding to the amount of heat emitted by the radiator is determined on the basis of a temperature relevant for the heat emission of the radiator in the form of the radiator's excess temperature, i.e., the temperature difference between surface temperature To and room temperature TL, the radiator exponent n, and the radiator's reference output QR. The solution according to the invention, and in particular the method described here, makes it possible, in particular, to operate the heat cost allocator described here, and in particular the device according to the invention, in such a way that the requirements of EN 834:2013 + AC:2015 (D) are met.

[0054] Furthermore, according to the invention, this heat cost allocator does not need to be mounted on the radiator, i.e., in particular not on the visible front surface of the radiator. Instead, it is only necessary to mount components of this heat cost allocator on and / or in the flow pipe and on and / or in the return pipe of the radiator in the manner described above. The flow pipe of the radiator is a pipe for the heat transfer medium that leads exclusively to this radiator, and the return pipe of the radiator is a pipe for the heat transfer medium that leads exclusively away from this radiator. The components are advantageously arranged directly on the radiator on and / or in the flow pipe or on and / or in the return pipe.

[0055] As mentioned above, the solution according to the invention also makes it possible to determine the surface temperature To of the radiator at the specified relative height h%, the logarithmic excess temperature ΔT ln of the radiator, the radiator exponent n, and the reference output QR of the radiator. This allows consumption values ​​Q1, Q2, and Q3 to be calculated both according to known operating principles based on volume flow measurement and based on the measurement of the surface temperature To of the radiator at the specified relative height h%. This makes the heat cost allocator compliant with EN 834:2013 + AC:2015 (D). Thus, at least one consumption value Q1, Q2, or Q3 corresponding to a quantity of heat emitted by the radiator is determined.

[0056] As described above, the heat cost allocation device is advantageously designed as a heat cost allocation system with at least two independent modules that are advantageously able to communicate with each other. At least one of these two modules, i.e., the flow module and / or the return module, measures a heating medium flow rate, i.e., the volume flow rate m of the heat transfer medium, and a medium temperature, i.e., the flow temperature Tv or return temperature TR, as well as the room temperature TL if this is not measured by the third module, using its volume flow sensor, and transmits these measured values ​​to at least one other module which contains the processing unit.If the radiator has a radiator valve with a constant flow rate m, for example, the radiator valve with a constant flow rate m and thermostatic head described above, perhaps as part of the heat cost allocator, particularly its supply assembly, then measuring the flow rate m is not necessary; instead, the known constant flow rate m is used. However, it is then necessary to determine whether this flow rate m is present, for example, based on the measured supply temperature or by means of an opening sensor on the radiator valve. The known constant flow rate is present, for example, only if the opening sensor detects that the radiator valve is open, and / or if the supply temperature sensor detects that the supply temperature has reached or exceeded a predetermined minimum value or has increased.

[0057] The calculation unit of the heat cost allocator, which is arranged in one of the flow or return assembly or in the third or fourth assembly, calculates the surface temperature To of the radiator at the specified relative height h% on the radiator, the logarithmic excess temperature ΔT ln of the radiator, the radiator exponent n of the radiator, the reference output QR of the radiator and at least one consumption value Q1, Q2, Q3 corresponding to the amount of heat emitted by the radiator, i.e. in particular one or more consumption values ​​Q1, Q2, Q3 on the basis of the flow information according to formula (1) above and / or on the basis of the excess temperature of the radiator, i.e. the temperature difference between surface temperature To and room temperature TL, according to formula (2) above and / or on the basis of the logarithmic excess temperature ΔT ln of the radiator according to formula (4) above.

[0058] In one possible embodiment of the method, at least two operating points are determined with at least substantially constant volume flow m, constant supply temperature Tv and constant return temperature TR and, in particular, also constant room temperature TL.

[0059] In one possible embodiment of the method, the surface temperature To of the radiator at the specified relative height h% on the radiator is determined for each of the operating points from the flow temperature Tv and the return temperature TR.

[0060] In one possible embodiment of the method, an instantaneous power Q A1 , Q A2 of the radiator is determined for each of the operating points from the supply temperature Tv, the return temperature TR and the volume flow m.

[0061] In one possible embodiment of the method, the logarithmic excess temperature ΔT ln,A1 , ΔT ln,A2 of the radiator is determined for each of the operating points from the flow temperature Tv, the return temperature TR and the room temperature TL.

[0062] In one possible embodiment of the method, the radiator exponent n is determined from the logarithmic temperature differences ΔT ln,A1 , ΔT ln,A2 and instantaneous powers Q A1 , Q A2 of the two operating points.

[0063] In one possible embodiment of the method, the reference power QR of the radiator is determined from the logarithmic excess temperature ΔT ln,A1 , ΔT ln,A2 and the instantaneous power Q A1 , Q A2 of at least one of the operating points and the radiator exponent n.

[0064] In one possible embodiment of the method, the KQ value is determined from the reference power QR of the radiator.

[0065] Since the relationships between the temperatures at the radiator—i.e., between the flow temperature Tv, the return temperature TR, and the surface temperature To of the radiator at the given relative height h%—are not constant, but can generally change, even out of phase, due to changes in the flow rate and the heat capacity of the radiator, the detection of the point in time of a defined operating state at the radiator is necessary for all calculations described below. (It should be noted that even when using a radiator valve with a constant flow rate m, a change in flow rate occurs when the radiator valve opens and closes.) A suitable point in time for this, referred to below as the operating point mentioned above, is, for example, the reaching of a relative maximum of the measured return temperature TR.To reliably detect all process parameters at this point in time, the assemblies advantageously reduce their measurement intervals, for example, from four minutes in normal operation to four seconds to determine the aforementioned values, i.e., the volume flow rate m of the heat transfer medium if no radiator valve with a constant volume flow rate m is used, and thus this value of the constant volume flow rate m, as well as the supply temperature Tv, return temperature TR, and room temperature TL. From this, the surface temperature To of the radiator at the specified relative height h% on the radiator, the logarithmic temperature difference ΔT ln of the radiator, the radiator exponent n of the radiator, and the reference power QR of the radiator are subsequently determined.This determination can be carried out, for example, once after the installation of the heat cost allocator, or several times, for example, regularly, such as annually or at other intervals, in order to also capture changes in these parameters that are caused, for example, by aging effects. If the volume flow rate m is not measured because the radiator valve is used with a constant volume flow rate m, then the known value of the constant volume flow rate m is used instead of the measured value for the volume flow rate m.

[0066] For a stable operating point, constant flow rate m, and constant values ​​of the supply temperature TR and room temperature TL, a linear profile of the radiator surface temperature To can be assumed. A stable operating point exists, in particular, when the flow rate m, the supply temperature Tv, the return temperature TR, and the room temperature TL do not change for a given period. Specifically, each new room temperature TL can be assigned an operating point.

[0067] Since the flow temperature Tv is generally fixed by the heating system and the room temperature TL changes only slowly due to the room's high heat capacity, the return temperature TR will also stabilize after the valve opens and the flow rate stabilizes, following a time determined by the radiator's heat capacity, and can be considered constant for a given period. At operating points with different room temperatures TL and the same flow temperature Tv, different return temperatures TR will result, or at least different relative maximums of the return temperature TR relative to the flow temperature Tv.For example, the flow temperature Tv is always the same, but at different room temperatures TL, the resulting different heat output of the radiator to the room, especially to the room air, leads to different return temperatures TR. With the linear profile of the surface temperature To of the radiator at the given relative height h% on the radiator mentioned above, the following applies: . T O − T R = k % T V − T R

[0068] The computing unit of the distributed heat cost allocation system, i.e., the heat cost allocation device, which is advantageously arranged in one of the assemblies, calculates for this defined time, i.e., for this operating point, from the flow temperature Tv and return temperature TR the surface temperature To of the radiator at the specified relative height h% on the radiator: T O = h % T V − T R + T R

[0069] Using the flow information, i.e. the volume flow m, determined from the supply assembly and / or the return assembly, or the known constant volume flow m of the radiator valve used with constant volume flow m, an instantaneous power Q of the radiator is calculated according to the following formula (7). Q = c m T V − T R

[0070] As described, this is carried out for at least two operating points A1 and A2, so that the instantaneous powers Q A1 , Q A2 for the two operating points are determined according to formula (7).

[0071] The distributed heat cost allocation system, i.e. the heat cost allocation device, stores the value of the instantaneous power Q A1 , Q A2 of the respective operating point together with the operating point data volume flow m, supply temperature Tv, return temperature TR and room temperature TL of the respective operating point.

[0072] Using the known relationship for the logarithmic excess temperature ΔT ln according to formula (3), the logarithmic excess temperature ΔT ln,A1 , ΔT ln,A2 is now calculated for each of the operating points. If data from at least two different operating points are available, the distributed heat cost allocation system, i.e., the heat cost allocation device, can calculate the radiator exponent n from this: n = ln ΔT ln , A 1 ΔT ln , A 2 Q A 1 Q A 2

[0073] Using the well-known radiator equation Q R = Q ΔT ln , R ΔT ln n The reference output QR of the radiator can now be calculated. This calculation is performed, for example, using the logarithmic excess temperature ΔT ln,A1, ΔT ln,A2 and the instantaneous output Q A1, Q A2 of one of the operating points, or, for verification purposes, separately using the logarithmic excess temperature ΔT ln,A1, ΔT ln,A2 of several or all recorded operating points. The logarithmic excess temperature ΔT ln,A1, ΔT ln,A2 of the respective operating point is then used for ΔT ln,A1, and the instantaneous output Q A1, Q A2 of the respective operating point is used for Q in formula (9). The logarithmic reference excess temperature ΔT ln,R of the respective reference system is a predetermined and therefore known value for the heat cost allocator.

[0074] The reference output QR of the radiator determined in this way will generally not correspond to the radiator's nominal output determined in the laboratory, because it will have been determined at different operating points and under real installation conditions on an individual radiator. It is therefore advantageously more accurate for the respective specific radiator than a radiator's nominal output determined in the laboratory on another radiator of the same type.

[0075] Using this determined reference output QR of the radiator, the KQ value can then be calculated as a dimensionless numerical value for the reference output QR of the radiator. This KQ value and its calculation are specific to the respective heat cost allocator, in particular according to a predefined base output of the heat cost allocator. The KQ value is, in particular, the quotient of the determined reference output QR of the radiator to the predefined base output.

[0076] In one possible embodiment of the method, the c-values ​​of the flow temperature sensor, the return temperature sensor, and the at least one room temperature sensor (or multiple room temperature sensors if the heat cost allocator includes several room temperature sensors) are determined and taken into account for all pipe diameters and pipe materials intended for the flow and return lines of the radiator (usually, the diameter and material of the respective flow and return lines are the same). That is, these c-values, which represent correction factors of the temperature sensors, are considered. As described, these can easily be determined once in the laboratory, since they are independent of the radiator and only need to be determined for all relevant pipe diameters and materials. In one possible embodiment of the method, a Kc-value is therefore determined once using the c-values.In particular, the Kc value is determined once for each of the following pipe diameters and pipe materials used for the flow and return lines of the radiator, using the c-values ​​determined for the respective pipe diameter and pipe material used for the flow and return lines of the radiator. This eliminates the need to determine separate Kc values ​​for each radiator and heat cost allocator.

[0077] Advantageously, the correction factor K is determined from the determined KQ value and the determined Kc value.

[0078] In one possible embodiment of the method, a consumption value Q1, Q2, Q3 corresponding to the amount of heat emitted by the radiator is determined using the specific heat capacity c of the heat transfer medium flowing through the radiator, the volume flow rate m, the supply temperature Tv and the return temperature TR, in particular according to formula (1), and / or using the correction factor K determined from the KQ value and the Kc value, the surface temperature To of the radiator at the specified relative height h% on the radiator, the room temperature TL and the radiator exponent n, in particular according to formula (2), and / or using the correction factor K determined from the KQ value and the Kc value, the logarithmic excess temperature ΔT ln of the radiator and the radiator exponent n, in particular according to formula (4).This determination of at least one consumption value Q1, Q2, Q3 corresponding to the amount of heat emitted by the radiator, in particular according to formula (1) and / or (2) and / or (4), is expediently carried out not only on the basis of the operating points mentioned above, but in a manner customary and / or prescribed for heat cost allocators, for example continuously, in particular constantly, i.e. continuously, or for example regularly, in particular at specified times and / or in specified periods, and / or in a specified event-controlled manner.

[0079] For example, the flow control unit transmits its measurement results to the return control unit via its communication device only at predetermined times, such as when the thermostatic valve is fully open. The return control unit monitors the return temperature. For example, if the return temperature rises above a predefined, and in particular adjustable, threshold value, this return control unit can also initiate communication between the units.

[0080] Communication between the modules is wireless, bidirectional, and event-driven, for example, with such low transmission power that communication is just barely possible, e.g., only over a few meters. This protects the communication link from external interference, saves energy, and reduces high-frequency exposure in the environment. For example, the transmission power for communication between modules in the same room is 0 dBm or less (i.e., a maximum of 0 dBm), and / or for communication between modules in different rooms, different apartments, and / or different buildings, it is 10 dBm or more (i.e., at least 10 dBm).

[0081] For example, during installation, the modules send installation telegrams to exchange device identifications between all related modules of the heat cost allocator. Once the group is established, the transmission power of each individual transmission path, e.g., between the supply module and the radiator surface module, is reduced to the minimum necessary for communication, thus saving energy. To achieve this, the modules measure the input levels of the received signals and communicate these to the transmitting modules. These then calculate how much the transmission power can be reduced to just achieve the minimum required input level of, for example, -90 dBm.

[0082] Communication between the modules is event-driven, for example, to save energy. This means that telegrams are generally not constantly exchanged between the modules. Events that trigger transmissions can be occurrences (e.g., a valve opening) or specific times (e.g., the change of month). This means that, for example, in summer when the heating is not in use, a status signal is only sent at defined times. If, for example, the flow control module registers the opening of the radiator valve, this information is communicated to the radiator surface module.

[0083] Advantageously, each component of the heat cost allocator is configured to detect a failure of another component of the heat cost allocator and to send an error message, for example with increased transmission power, to one or more higher-level system devices via its communication device. This is carried out accordingly in the procedure.

[0084] In principle, it is also possible to connect closely spaced assemblies with a cable. In such a case, it may be advantageous to equip these connected assemblies with only one power supply, e.g., a battery.

[0085] The heat cost allocator is advantageously backward compatible with compact heat cost allocators based on the surface temperature measurement principle described above. In particular, if the KQ value is determined identically to these compact heat cost allocators, the heat cost allocator can thus be integrated into a heat cost allocator system that incorporates such compact heat cost allocators.

[0086] The heat cost allocator is advantageously designed to apply, in particular by means of the so-called chameleon principle, a start and counting behavior of any compact heat cost allocator as described and in particular claimed in EP 1 592 948 B1 of the applicant.

[0087] Another advantageous feature of the heat cost allocator is its ability to reliably detect measurement errors caused by external heating of the radiator, for example, by direct sunlight. This is achieved by checking, for instance, whether a difference between the flow temperature Tv and the return temperature TR and a specific flow rate m of the heat transfer medium are present simultaneously, or by determining and comparing the room temperature TL in the various modules if room temperature sensors are installed in multiple modules. External heating or manipulation can then be ruled out if the modules have determined the same room temperature TL value, for example, taking into account a predefined tolerance. External heating is also the sole cause if a temperature difference between the flow temperature Tv and the return temperature TR is detected with the radiator valve closed.

[0088] The processing unit and the room temperature sensor(s) can be located, for example, in the flow assembly and / or, if necessary redundantly, in the return assembly of the heat cost allocator, together with the respective communication device. Alternatively, it is also possible, for example, for the room temperature sensor and / or the processing unit to be located in a third assembly in the room containing the radiator. In this case, this third assembly also includes a communication device to exchange the measured values ​​with the other assemblies or at least to receive the measured values ​​from the other assemblies. Such a third assembly has the advantage that the room temperature measurement can be carried out completely independently of the heating system; that is, the room temperature (TL) is not measured directly at the radiator, i.e., in its immediate vicinity, but at a greater distance from the radiator in the same room.

[0089] The processing unit of the heat cost allocator can be located in any module of the heat cost allocator, or redundantly in several or all modules, or, alternatively or redundantly, outside the modules containing the sensors, in the fourth module. This fourth module is, for example, an external module. It can also be, for example, an application on a cloud server that calculates the consumption values ​​Q1, Q2, and Q3 from the measurement data of the individual sensors in the manner described above and then advantageously makes them available for further use. Advantageously, this fourth module also has a communication device for communicating with the other modules, in particular to receive the sensor measurements and to perform the calculations described above using its processing unit.It is specifically intended that sensor values ​​from the sensors of the modules are transmitted via their communication devices to the module with the computing unit, in order to be processed in the computing unit in the manner described above.

[0090] In another possible embodiment, at least two or more or all components of the heat cost allocator, in particular at least the flow and return components, are interconnected by data transmission lines. This can be particularly useful if the flow and return lines are located directly next to each other.

[0091] If at least two modules are connected by a cable, this cable can also be used for power distribution. In this case, both modules can be powered from a single power supply, e.g., a battery.

[0092] Communication between the modules can therefore be wireless or wired, with the communication devices being designed accordingly. A combination of wired and wireless communication between two or more modules of the heat cost allocator is also possible, with the communication devices being designed accordingly in each case. For example, communication between the flow and return modules is wired, while communication between the third and / or fourth module, if present, and the other modules is wireless.

[0093] Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. These show: Figure 1 schematically shows an embodiment of a heat cost allocation device, Figure 2 schematically shows another embodiment of a heat cost allocation device, Figure 3 schematically shows another embodiment of a heat cost allocation device.

[0094] Corresponding parts are marked with the same reference symbols in all figures.

[0095] Figure 1Figure 1 shows an embodiment of a heat cost allocation device 1 designed as a distributed heat cost allocation system. In this embodiment, the heat cost allocation device 1 comprises two assemblies BG1 and BG2: a flow assembly BG1, which can be arranged on a supply line 2 of a radiator 3 or, as shown here, is already arranged, and which includes a communication device and a flow temperature sensor; and a return assembly BG2, which can be arranged on a return line 4 of the radiator 3 or, as shown here, is already arranged, and which includes a communication device and a return temperature sensor. These two assemblies BG1 and BG2, with this respective minimum equipment, are also included in the two further embodiments according to the figures. Figures 2 and 3 present. Furthermore, the heat cost allocator 1 includes both in the Figure 1 the embodiment shown as well as in the embodiments according to the Figures 2 and 3, at least one flow sensor arranged in the supply assembly BG1 or return assembly BG2, or alternatively or additionally a radiator valve with a constant flow rate m, wherein, alternatively or additionally, the known constant flow rate m is used for the method described below. Furthermore, the heat cost allocator 1 comprises, both in the Figure 1 the embodiment shown as well as in the embodiments according to the Figures 2 and 3 , at least one room temperature sensor and at least one processing unit. In all illustrated embodiments, it can be provided that both the flow assembly BG1 and the return assembly BG2 each have a flow rate sensor, for example, even if a radiator valve with a constant flow rate m is already used on the radiator. Alternatively, no flow rate sensor is provided when using the radiator valve with a constant flow rate m.

[0096] In the embodiment according to Figure 1 The room temperature sensor is located in the flow assembly BG1 or in the return assembly BG2, or both the flow assembly BG1 and the return assembly BG2 each have a room temperature sensor. Similarly, the processing unit is located in the flow assembly BG1 or in the return assembly BG2, or both the flow assembly BG1 and the return assembly BG2 each have a processing unit.

[0097] The supply assembly BG1 is, for example, designed as a radiator valve with a thermostatic head, which is operated, for example, with a constant flow rate or in proportional operation, where there is a direct proportionality between a valve stroke and a flow rate m of a heat transfer medium flowing through the radiator 3, or this supply assembly BG1 comprises such a radiator valve with a thermostatic head. The supply temperature sensor in the supply assembly BG1 detects a supply temperature Tv of the radiator 3. The return temperature sensor in the return assembly BG2 detects a return temperature TR of the radiator 3. If a flow rate sensor is arranged in both the supply assembly BG1 and the return assembly BG2, then redundant measurement of the flow rate m of the heat transfer medium through the radiator 3 is enabled.

[0098] The computer calculates, in the manner described above, a surface temperature To of radiator 3 at a predetermined relative height h% on radiator 3 and / or a logarithmic temperature difference ΔT ln of radiator 3 from the measured or known process variable volume flow rate m and the measured process variables supply temperature Tv, return temperature TR, and room temperature TL. In particular, the computer calculates the current heat output supplied to radiator 3. From the data of at least two operating points, the computer calculates, in the manner described above, a radiator exponent n and a reference output QR of radiator 3. In particular, the computer calculates, in the manner described above, at least one consumption value Q1, Q2, Q3 corresponding to a quantity of heat emitted by radiator 3, in particular according to formulas (1), (2), and / or (4).The respective data are advantageously transmitted between the assemblies BG1, BG2 via the communication devices and optionally also to a measuring device network via at least one of the communication devices.

[0099] Figure 2Figure 1 shows a further embodiment of the heat cost allocator 1. In this embodiment, the heat cost allocator 1 comprises, in addition to the flow assembly BG1, which can be arranged on the supply line 2 of the radiator 3 or, as shown here, is already arranged, and the return assembly BG2, which can be arranged on the return line 4 of the radiator 3 or, as shown here, is already arranged, a third assembly BG3. In this embodiment, the room temperature sensor, together with another communication device, is arranged in the third assembly BG3, away from the radiator 3, in the same room. Optionally, the flow assembly BG1 and / or the return assembly BG2 can also have a room temperature sensor. In this embodiment, the calculating unit can be arranged in one of the three assemblies BG1, BG2, or BG3. Alternatively, two of the assemblies BG1, BG2, or BG3, or all three assemblies BG1, BG2, or BG3, can have such a calculating unit.

[0100] The computer calculates, in the manner described above, the surface temperature To of radiator 3 at the specified relative height h% on radiator 3 and / or the logarithmic temperature difference ΔT ln of radiator 3 from the measured or known process variable volume flow rate m and the measured process variables supply temperature Tv, return temperature TR, and room temperature TL. In particular, the computer calculates the current heat output supplied to radiator 3. From the data of at least two operating points, the computer calculates, in the manner described above, the radiator exponent n and the reference output QR of radiator 3. In particular, the computer calculates, in the manner described above, at least one consumption value Q1, Q2, Q3 corresponding to the amount of heat emitted by radiator 3, in particular according to formulas (1), (2), and / or (4).The respective data are advantageously transmitted between the assemblies BG1, BG2 via the communication devices and optionally also to a measuring device network via at least one of the communication devices.

[0101] In Figure 3Figure 1 shows a further embodiment of the heat cost allocator 1. In this embodiment, the heat cost allocator 1 comprises, in addition to the flow assembly BG1, which can be arranged on the supply line 2 of the radiator 3 or, as shown here, is already arranged, and the return assembly BG2, which can be arranged on the return line 4 of the radiator 3 or, as shown here, is already arranged, as well as the third assembly BG3, a fourth assembly BG4. The room temperature sensor is again located in the third assembly BG3, away from the radiator 3, in the same room as the communication device. Optionally, the flow assembly BG1 and / or the return assembly BG2 can also include a room temperature sensor. The fourth assembly BG4 contains a further communication device and the processing unit.Alternatively, two or three of the modules BG1, BG2, BG3, BG4, or all four modules BG1, BG2, BG3, BG4, can have such a calculating unit. The fourth module BG4 is located outside the room containing radiator 3. It is, for example, part of a central computing system in which at least one consumption value from the heat cost allocator is calculated.

[0102] The computer calculates, in the manner described above, the surface temperature To of radiator 3 at the specified relative height h% on radiator 3 and / or the logarithmic temperature difference ΔT ln of radiator 3 from the measured or known process variable volume flow rate m and the measured process variables supply temperature Tv, return temperature TR, and room temperature TL. In particular, the computer calculates the current heat output supplied to radiator 3. From the data of at least two operating points, the computer calculates, in the manner described above, the radiator exponent n and the reference output QR of radiator 3. In particular, the computer calculates, in the manner described above, at least one consumption value Q1, Q2, Q3 corresponding to the amount of heat emitted by radiator 3, in particular according to formulas (1), (2), and / or (4).The respective data are advantageously transmitted between the assemblies BG1, BG2 via the communication devices and optionally also to a measuring device network via at least one of the communication devices. REFERENCE MARK LIST

[0103] 1Heat cost allocation device 2Supply pipe 3Radiator 4Return pipe BG1 Feeder assembly BG2 Return assembly BG3 Third assembly BG4 Fourth assembly

Claims

1. Method for operating a heat cost allocator (1), wherein a volume flow rate (m), a supply temperature (Tv) and a return temperature (T) are parameters of a first parameter group. R ) of a heat transfer medium flowing through the radiator (3) and a room temperature (TL) are determined, and from at least one parameter of this first parameter group - a surface temperature (To) of the radiator (3) at a given relative height (h%) on the radiator (3), - a logarithmic excess temperature (ΔT) ln ) of the radiator (3), - a radiator exponent (n) of the radiator (3), - a reference power (Q R ) of the radiator (3), and - at least one consumption value (Q1, Q2, Q3) corresponding to a quantity of heat emitted by the radiator (3) is derived as a parameter of a second parameter group.

2. The method of claim 1, wherein at least two operating points with, at least substantially, constant volume flow rate (m), constant supply temperature (Tv) and constant return temperature (T) R ) and especially also constant room temperature (T L ) are determined, whereby for each of the operating points, the flow temperature (Tv) and the return temperature (T) are used to determine the operating points. R ) and the volume flow rate (m) an instantaneous power (Q A1 , Q A2 ) of the radiator (3) is determined and / or from the flow temperature (Tv), the return temperature (T R ) and the room temperature (T L ) the logarithmic temperature rise (ΔT ln,A1 , ΔT ln,A2 ) of the radiator (3) is determined.

3. Method according to claim 2, wherein from the logarithmic excess temperatures (ΔT ln,A1 , ΔT ln,A2 ) and instantaneous power (Q A1 , Q A2) the radiator exponent (n) of the two operating points is determined and from the logarithmic excess temperature (ΔT) ln,A1 , ΔT ln,A2 ) and the instantaneous power (Q A1 , Q A2 ) at least one of the operating points and the radiator exponent (n) the reference power (Q R ) of the radiator (3) is determined.

4. Method according to claim 3, wherein the reference power (Q) R ) of the radiator (3) a K Q -value is determined.

5. Method according to one of the preceding claims, wherein c-values ​​of a flow temperature sensor, a return temperature sensor and at least one room temperature sensor are determined for all intended pipe diameters and pipe materials.

6. Method according to claim 5, wherein a Kc value is determined using the c-values ​​of the temperature sensors.

7. Method according to one of the preceding claims, wherein by means of a specific heat capacity (c) of a heat transfer medium flowing through the radiator (3), the volume flow rate (m), the supply temperature (Tv) and the return temperature (T) R ) and / or by means of one from the K Q -value and the correction factor (K) determined from the Kc value, the surface temperature (To) of the radiator (3) at the specified relative height (h%) on the radiator (3), the room temperature (TL) and the radiator exponent (n) and / or by means of the correction factor (K) determined from the K Q -value and the correction factor (K) determined from the Kc value, the logarithmic excess temperature (ΔT) ln ) of the radiator (3) and the radiator exponent (n) a consumption value (Q1, Q2, Q3) corresponding to the amount of heat emitted by the radiator (3) is determined.

8. Heat cost allocation device (1), operable or operated by means of a method according to one of the preceding claims, comprising a flow assembly (BG1) that can be arranged or is arranged on a flow line (2) of a radiator (3) with a flow temperature sensor which is designed and configured to determine the flow temperature (Tv), and a return assembly (BG2) that can be arranged or is arranged on a return line (4) of the radiator (3) with a return temperature sensor which is designed and configured to determine the return temperature (T). R), at least one room temperature sensor which is designed and configured to determine the room temperature (TL), and at least one or more computing units which are designed and configured or which are together configured and configured to determine all parameters of the second parameter group by means of at least one parameter of the first parameter group.

9. Heat cost allocation device (1) according to claim 8, - wherein the supply assembly (BG1) comprises a communication device which is in particular designed and equipped for communication with the return assembly (BG2) and / or a third assembly (BG3) and / or a fourth assembly (BG4), and / or - wherein the return assembly (BG2) comprises a communication device which is in particular designed and equipped for communication with the supply assembly (BG1) and / or the third assembly (BG3) and / or the fourth assembly (BG4).

10. Heat cost allocation device (1) according to claim 8 or 9, wherein at least one volume flow sensor is provided which is arranged in the supply assembly (BG1) or return assembly (BG2) and is designed and configured for determining, in particular measuring, the volume flow (m).

11. Heat cost allocation device (1) according to one of claims 8 to 10, wherein the supply assembly (BG1) is designed as a radiator valve with a thermostatic head, which is designed with a constant volume flow or for carrying out a proportional operation in which there is a direct proportionality between a valve stroke of the radiator valve and a volume flow (m) through the radiator valve, or comprises such a radiator valve with a thermostatic head.

12. Heat cost allocation device (1) according to one of claims 8 to 11, comprising a third assembly (BG3) spaced apart from the radiator (3), in particular with a further communication device, which is in particular designed and equipped for communication with the flow assembly (BG1) and / or the return assembly (BG2) and / or a fourth assembly (BG4), wherein the third assembly (BG3) can be arranged or is arranged in the same room of a building as the radiator (3).

13. Heat cost allocation device (1) according to one of claims 8 to 12, comprising a fourth assembly (BG4) spaced apart from the radiator (3), in particular with a further communication device, which is in particular designed and equipped for communication with the flow assembly (BG1) and / or the return assembly (BG2) and / or a third assembly (BG3), wherein the fourth assembly (BG4) can be arranged or is arranged outside the room in which the radiator (3) is arranged.

14. Heat cost allocation device (1) according to one of claims 8 to 13, wherein the at least one room temperature sensor or at least one further room temperature sensor, which is designed and configured to determine the room temperature (TL), is arranged in the flow assembly (BG1), in the return assembly (BG2) or in the third assembly (BG3).

15. Heat cost allocation device (1) according to one of claims 8 to 14, wherein the calculating unit or at least one further calculating unit, which is designed and configured to determine at least one parameter of the second parameter group by means of at least one parameter of the first parameter group, is arranged in the flow assembly (BG1), in the return assembly (BG2), in the third assembly (BG3) or in the fourth assembly (BG4).