Method and computer program for regulating a combustion plant and combustion plant

Abstract

Power recording and air ratio control using sensors in the combustion chamber. A method for controlling a combustion system, the combustion system comprising a combustion chamber and a first temperature sensor and a second temperature sensor in the combustion chamber, the method comprising the following steps: recording a first signal from the first temperature sensor and a second signal from the second temperature sensor; determining a first combustion power as a function of the first signal using a first characteristic curve, which describes the course of the combustion power with the signal of the first temperature sensor for the first temperature sensor; determining a second combustion power as a function of the second signal using a second characteristic curve, which describes the course of the combustion power with the signal of the second temperature sensor for the second temperature sensor; and determining the current combustion power of the combustion system as a function of the first and second combustion powers.

Description

Technical Field

[0001] The present disclosure relates to control and / or regulation in combustion systems, such as gas burners, in conjunction with combustion sensors. Combustion sensors in combustion systems are, for example, ionization electrodes and / or optical sensors. In particular, the present disclosure relates to regulation and / or control of combustion systems in the presence of hydrogen. Background Art

[0002] When a combustion system is in operation, its combustion power must be known and / or adjusted. For the combustion of hydrocarbons or pure hydrogen or a mixture of both, the air supply and the fuel supply must be adjusted to each other. This achieves the correct air factor λ.

[0003] Furthermore, external influences may affect the air coefficient and / or combustion performance. Examples of such external influences include the inlet pressure of the fuel, in particular the fuel gas, and the fuel composition. Other examples of external influences include changes in the ambient temperature, ambient pressure, and changes in the intake and exhaust paths of the combustion system.

[0004] In addition to the sensors mentioned, sensors of this type which monitor the flame in a safety-oriented manner can be included in the control of the combustion power and / or the air ratio of the combustion system.

[0005] Until now, optical flame monitoring has been used for the combustion of pure hydrogen in combustion plants. However, optical sensors for recording signals during combustion are expensive.

[0006] Also conceivable are thermocouples and / or resistance temperature sensors as sensors for recording combustion signals. These are thermally coupled to the combustion air and / or mixture and / or exhaust gas and / or plasma at the combustion system. Furthermore, they are thermally coupled to the mechanical base. Due to these couplings, thermocouples and / or resistance temperature sensors have traditionally been too slow for monitoring fuel processes.

[0007] In particular, such elements and sensors are often slow for monitoring flames in combustion equipment.

[0008] Siemens Building Technologies filed European patent application EP1154202A2 on April 27, 2001. The application was published on November 14, 2001. EP1154202A2 describes a burner control device. EP1154202A2 claims priority on May 12, 2000. EP1154202A2 was granted as European patent EP1154202B1. Patent documents EP1154202B2 still exist after opposition proceedings.

[0009] EP1154202B2 distinguishes between low-calorific-value and high-calorific-value fuel gases. Two characteristic curves are used to distinguish between these two types of fuel gas. Each of these characteristic curves is related to a control signal for the burner's control mechanism that varies with the burner's fan speed. To regulate the burner, the control signals corresponding to these characteristic curves are weighted.

[0010] EP1154202B2 also claims the use of additional sensors to regulate the combustion system. These additional sensors influence the state of the combustion system's regulating mechanism based on their sensor results. EP1154202B2 mentions changes in boiler temperature as an example of measurement data obtained from these additional sensors.

[0011] EBM PAPST LANDSHUT GMBH filed patent application DE 10 2004 030 300 A1 on June 23, 2004. The application was published on January 12, 2006. DE 10 2004 030 300 A1 describes a method for adjusting operating parameters of a combustion device.

[0012] DE102004030300A1 discloses a mixing area into which the air supply and the gas supply lead. A pipeline is led out from the mixing area. The pipeline ends at the burner part. The flame is arranged above the burner part. The temperature sensor is optionally arranged on the surface of the burner part. The temperature sensor can also be arranged at other locations within the range of the flame. Here, the temperature sensor can be

[0013] - Arranged in the heart of the flame,

[0014] - Arranged at the flame foot point,

[0015] - arranged at the tip of the flame,

[0016] However, it can also be arranged at a distance from the flame, for example on the burner plate itself. By determining and recording the actual temperature measured in the range of the burner flame, which depends on the set mixing ratio, the maximum temperature value and the associated mixing ratio are determined.

[0017] EBM PAPST Landshut GmbH filed another patent application, DE 10 2004 055 716 A1, on November 18, 2004. This application was published on January 12, 2006. DE 10 2004 055 716 A1 describes a method for regulating and controlling a combustion device. DE 10 2004 055 716 A1 claimed priority on June 23, 2004.

[0018] DE102004055716A1 also discloses a mixing area into which the air and gas supplies flow. Pipelines lead from this mixing area. These pipes terminate in a burner section. The flame is arranged above this burner section. The temperature sensor can be arranged, for example, in the area of ​​the flame, but can also be arranged near the flame on the burner. For example, a thermocouple can also be used as a temperature sensor. DE102004055716A1 teaches that the temperature T generated by the combustion device is measured. ist Adjust to the target temperature T soll Here, a characteristic curve is used, which shows the target temperature T soll Depends on the air mass flow and / or the load of the combustion system. The air factor λ is another parameter that remains constant.

[0019] EBM PAPST Landshut filed international patent application WO 2006 / 000367 A1 on June 20, 2005. The application was published on January 5, 2006. WO 2006 / 000367 A1 describes a method for adjusting the air coefficient in a combustion device. WO 2006 / 000367 A1 claims priority on June 23, 2004.

[0020] WO2006 / 000367A1 also discloses a mixing area into which the air supply and the gas supply lead. A pipeline is led out of the mixing area. The pipeline ends at the burner part. The flame is arranged above the burner part. The temperature sensor can be arranged, for example, in the area of ​​the flame, but can also be arranged near the flame on the burner. For example, a thermocouple can also be used as a temperature sensor. The temperature sensor is optionally arranged on the surface of the burner part. The temperature sensor can also be arranged at other locations within the range of the flame. In this case, the temperature sensor can be

[0021] - Arranged in the heart of the flame,

[0022] - Arranged at the flame foot point,

[0023] - arranged at the tip of the flame,

[0024] - However, it can also be arranged at a certain distance from the flame, for example on the burner plate itself. The method in WO 2006 / 000367 A1 is based on the actual temperature T recorded by the temperature sensor ist Depends on the air coefficient λ. The actual temperature reaches its maximum value T when λ=1 max Now, for a given air mass flow m L For example, the maximum value T is determined by the temperature sensor. max , by iteratively adapting the gas mass flow. Then, the air coefficient is preferably adjusted to λ=1.3 and the air mass flow m is increased accordingly. L .

[0025] Electrolux Appliances AB, SE filed another international patent application, WO 2015 / 113638 A1, on February 3, 2014. The application was published on August 6, 2015. WO 2015 / 113638 A1 teaches a gas burner application and a gas cooking device.

[0026] WO2015 / 113638A1 discloses a monitoring device that shuts off the gas supply when a flame is absent. To this end, the monitoring device cooperates with a shut-off device comprising a valve. The monitoring device may include a thermocouple or other sensor. Therefore, the monitoring device is safety-focused.

[0027] NORITZ CORP filed Japanese patent application JP2017040451A on August 21, 2015. The application was published on February 23, 2017. JP2017040451A discusses a combustion device.

[0028] JP2017040451A specifically addresses flame temperature detection while accounting for the delays of the corresponding sensors. Thermocouples and thermistors are considered sensors. To account for these delays, a prediction unit is used. The prediction unit determines a value by multiplying the difference between the previously recorded temperature and the current temperature by a coefficient. This value is then added to the currently recorded temperature. The coefficient required to determine this value depends on the delay time and a predetermined time period.

[0029] The sensor's latency is included in the IST's 2020 RTD Platinum Sensor Specifications. The response time, which is the time it takes for the sensor to track 63% of the temperature change due to the latency, varies between 2.5 and 40 seconds. This response time generally depends on the sensor's size.

[0030] Pneumatic gas-air systems and / or electronic systems can be used to regulate the combustion system. Technically, a modulation range of one to seven is usually achievable with pneumatic gas-air systems.

[0031] During pure hydrogen combustion, no usable signal is generated at the ionization electrodes. Therefore, ionization electrodes are hardly suitable for recording signals during pure hydrogen combustion. Consequently, electronic systems regulated according to the flame signal have only been technically feasible for hydrocarbon-containing fuel gases.

[0032] Furthermore, with electronic systems, combustion power and air supply depend solely on the fan speed. Correcting for environmental influences, such as air temperature, air pressure, and changes in the combustion system's intake and exhaust paths, is nearly impossible, as the use of other sensors is prohibitively expensive.

[0033] Electronic systems for hydrogen combustion require additional sensors, for example for detecting and monitoring the fuel gas quantity, in order to adjust the fuel gas quantity without combustion control.

[0034] The present disclosure aims to provide a regulation and / or control system that enables the combustion of a fuel gas containing hydrogen. In particular, the present disclosure aims to provide a regulation and / or control system that achieves a sufficient degree of modulation. Such regulation can also be applied to fuel gases containing hydrocarbons and / or mixtures of fuel gases containing hydrocarbons and hydrogen. Summary of the Invention

[0035] It is difficult to regulate and / or control a combustion system based on a single signal from a temperature sensor, as the signal depends crucially on its location within the combustion chamber of the combustion system. This requires consideration: the temperature signal is a function of the fuel-air mixture supply and, therefore, the combustion power. Furthermore, the temperature signal also depends on the fuel-air mixture ratio and, therefore, the air coefficient. It is almost impossible to uniquely assign a measured temperature value to exactly one combination of combustion power and air coefficient using only a single temperature sensor. Therefore, an additional signal is typically required. This signal is typically the air supply, representing the mixture supply or combustion power. The temperature measured in or near the flame can then be used to adjust the air coefficient according to a predetermined characteristic curve as a function of the measured value and the air supply. This method is described in EP1902254B1, in which the measured temperature is output within a range of values ​​as a function of the air coefficient and combustion power. Alternatively, the air coefficient can be used as an additional signal, and the mixture supply, i.e., the combustion power, can be determined based on the air coefficient and the measured temperature. The recording or determination of the fuel supply, in particular the gas supply, can also provide such an additional signal.

[0036] Correspondingly sufficiently accurate sensors for determining the air supply, mixture supply, or fuel supply are expensive. Less expensive sensors do not register fluctuations in ambient conditions, such as air temperature, air pressure, or even in the intake and / or exhaust paths. An example of such a less expensive sensor is the speed of a fan. Consequently, these sensors have the disadvantage that they only incompletely determine the air supply.

[0037] The present disclosure addresses these difficulties by arranging more than one sensor in the combustion chamber of a combustion system. In particular, more than one temperature sensor can be arranged in the combustion chamber of a combustion system. The signals of two sensors, in particular two temperature sensors, are read and each processed into a combustion power value. The signals of two sensors, in particular two temperature sensors, can also each be processed into a value for the air factor λ. Regulation and / or control can then be performed based on the determined combustion power and / or the determined air factor λ.

[0038] The individual processing of the individual measurement signals themselves into a value for the combustion power or the air ratio or a combination of the combustion power and the air ratio is generally not unique.

[0039] If the individual signals are assigned multiple values ​​to different combustion powers, a possible combustion power matching the individual signals is determined. Pairs are formed consisting of the combustion power determined based on the signal of the first-mentioned sensor and the combustion power determined based on the signal of the second-mentioned sensor. The pair with the smallest difference in combustion power is selected. Based on this pair, the current combustion power of the combustion system is determined.

[0040] These ambiguities can also be resolved by arranging another sensor, in particular another temperature sensor, in the combustion chamber. A signal is read from this other sensor, in particular from this other temperature sensor. The read signal is processed a third time to form a combustion power value and is also included in determining the current combustion power of the combustion system.

[0041] Another possibility for resolving the ambiguity is to include a supply signal in the evaluation. This supply signal could, for example, be the fan speed of a fan in the air supply duct. It could also be the signal of a flow sensor in the air supply duct or in the fuel supply duct. The supply signal could also be derived from the state of the air damper and / or the state of the fuel actuator. Using a supply signal has the advantage that the assignment of the supply signal to combustion power is often unique.

[0042] Two characteristic curves are defined for determining the combustion power pair for a given air ratio. Given corresponding positioning of the two sensors in the combustion chamber, there is exactly one point pair of two sensor values, where both combustion powers are identical for all possible air ratio values.

[0043] The described method allows the combustion power to be determined within a value range as a function of the corresponding measurement signal, given a predefined target value for the air factor. This determination is performed for each sensor arranged in the combustion chamber. This allows both the air factor and the combustion power to be adjusted to the predefined target value. The combustion power, which depends on the relevant sensor signals, can be stored as polynomials for both functions. In a preferred embodiment, the two functions can be stored as a sequence of points, with linear interpolation performed between these points at the minimum distance between the two points. If other sensors are used, the combustion power function can be stored within a value range using three or more sensors. The additional sensor can be, for example, a third sensor in the combustion chamber or a supply sensor.

[0044] For example, the control is performed as follows: the air actuator, or alternatively the fuel actuator, is first adjusted until the two combustion powers are identical or close to each other. The combustion power is then calculated, for example, as the average of the two calculated combustion powers. The air actuator and the fuel actuator are then adjusted, for example via a control circuit, so that the calculated combustion power is at its target value. Any resulting deviation of the air factor from the target value is then readjusted again by the air actuator, or alternatively the fuel actuator. As a result of the readjustment, the combustion powers calculated based on the two measurement signals are once again identical.

[0045] Alternatively, the air ratio and the combustion power can be adjusted jointly within the dead band of the target value by multi-circuit control.

[0046] By correcting the air coefficient, changes caused by external influences on the fuel can be corrected. Changes in the fuel composition primarily affect the air coefficient. The method disclosed herein corrects deviations in the air coefficient. Similarly, air coefficient adjustment can correct for changes in the fuel inlet pressure and / or fuel temperature and / or air pressure and / or air temperature.

[0047] Likewise, external influences on the combustion power can be compensated because the combustion power can be recalculated and adjusted to a predetermined target value. In this way, changes in the intake / exhaust path can also be corrected with respect to the air ratio and the combustion power. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Various features will become apparent to those skilled in the art from the following detailed description of the disclosed non-limiting embodiments. The accompanying drawings that participate in the detailed description can be briefly described as follows:

[0049] Figure 1 A combustion plant with two sensors for flame monitoring in a combustion chamber is shown;

[0050] Figure 2 shows the course of the combustion power as a function of the measurement signal of the sensor arranged in the combustion chamber when a unique distribution is made;

[0051] Figure 3 The graph shows the course of the combustion power as a function of the signals of two sensors arranged in the combustion chamber when the sensor assignment is not unique;

[0052] Figure 4 shows the course of the combustion power as a function of the signals of two sensors arranged in the combustion chamber when the signal courses intersect;

[0053] Figure 5The graph shows the course of the combustion power as a function of the signals of two sensors arranged in the combustion chamber and the deviation of the two signals when the mixture becomes leaner;

[0054] Figure 6 The graph shows the course of the combustion power as a function of the signals of two sensors arranged alternatively in the combustion chamber, as well as the deviation of the two signals, when the mixture becomes lean;

[0055] Figure 7 shows the air supply as a function of the air supply signal for two different intake-exhaust paths;

[0056] Figure 8 The course of two predefined control curves for the fuel gas valve and the calculated control curve for the current fuel and / or gas parameters are shown. DETAILED DESCRIPTION

[0057] Figure 1 A combustion device 1 is shown, such as a wall-mounted gas burner and / or a floor-standing gas burner. During operation, a flame of a heat generator burns in a combustion chamber 2 of the combustion device 1. The heat generator exchanges the thermal energy of the hot fuel gas for another fluid, such as water. The hot water can be used, for example, to operate a hot water heating system and / or to heat drinking water. According to another embodiment, the thermal energy of the hot fuel and / or fuel gas can be used, for example, to heat items in an industrial process. According to another embodiment, the heat generator is a combined heat and power system, such as an engine for such a system. According to another embodiment, the heat generator is a gas turbine. In addition, the heat generator can be used to heat water in a system for obtaining lithium and / or lithium carbonate. Exhaust gases 10 are discharged from the combustion chamber 2, for example via a flue.

[0058] The air supply 5 for the combustion process is supplied via a fan driven (by an electric motor). Via a signal line 14, a control and / or regulating device 13 predetermines the air supply V that the fan should deliver. L The fan speed of the fan speed sensor 12 is thus considered a measure of the air supply 5 .

[0059] According to one embodiment, the fan speed determined by the sensor 12 is fed back by the fan and / or by the fan drive 4 and / or air actuator 4 to the control and / or regulating device 13. For example, the control and / or regulating device 13 determines the fan speed via a signal line 15.

[0060] The control and / or regulating device 13 preferably comprises a microcontroller. Ideally, the control and / or regulating device 13 comprises a microprocessor. The control and / or regulating device 13 may be a regulating device. Preferably, the regulating device comprises a microcontroller. Ideally, the regulating device comprises a microprocessor. The regulating device may comprise a proportional-integral regulator. The regulating device may also comprise a proportional-integral-derivative regulator.

[0061] The control and / or regulation device 13 may also include field programmable (logic) gate components. The control and / or regulation device 13 may also include an application specific integrated circuit.

[0062] In one embodiment, the signal line 14 or 15 comprises an optical waveguide. In a special embodiment, the signal line 14 or 15 is implemented as an optical waveguide. Optical waveguides have advantages in terms of galvanic separation and explosion protection.

[0063] If the air supply 5 is regulated by air dampers and / or valves, the damper and / or valve state can be used as a measure of the air supply 5. Measured values ​​derived from the signals of the pressure sensor 12 and / or the mass flow sensor 12 and / or the volume flow sensor 12 can also be used.

[0064] According to one embodiment, the air supply V L is the current air flow rate. The air flow rate can be measured and / or specified in cubic meters of air per hour. Therefore, the air supply V L It may be measured and / or stated in cubic meters of air per hour.

[0065] Fuel Supply V B The fuel flow is controlled and / or regulated by means of the control and / or regulating device 13 by means of at least one fuel actuator 7-9 and / or at least one (motor-adjustable) valve 7-9. Figure 1 In the embodiment in which the fuel 6 is a fuel gas. The combustion device 1 can then be connected to various fuel gas sources, for example to a source with a high methane content and / or to a source with a high propane content. It is also provided that the combustion device 1 is connected to a source of fuel gas or a gas mixture, wherein the fuel gas or the gas mixture comprises hydrogen. In a special embodiment it is provided that more than five percent, in particular more than five percent, of the gas or the gas mixture is hydrogen by mass. In another special embodiment it is provided that the gas or the gas mixture comprises only or essentially only hydrogen. In another embodiment it is provided that variably, from zero to thirty percent of the fuel and / or gas and / or the gas mixture is hydrogen by mass. In Figure 1In the embodiment, the fuel gas quantity is adjusted by the control and / or regulating device 13 via at least one fuel valve 7-9 which can be adjusted (by motor). In this case, the control value of the gas valve 7-9, for example a pulse width modulated signal, is a measure of the fuel gas quantity. This control value is also the fuel supply V B value.

[0066] If a gas damper is used as the fuel actuator 7-9, the position of the damper can be used as a measure of the amount of fuel gas. According to a special embodiment, the fuel actuator 7-9 and / or the fuel valve 7-9 are adjusted by means of a stepper motor. In that case, the step position of the stepper motor is a measure of the amount of fuel gas. The fuel valve and / or the fuel damper can also be integrated into a unit having at least one or more safety shut-off valves 7, 8. A signal line 16 connects the fuel actuator 7 to the control and / or regulating device 13. Another signal line 17 connects the fuel actuator 8 to the control and / or regulating device 13. Yet another signal line 18 connects the fuel actuator 9 to the control and / or regulating device 13. In a special embodiment, the signal lines 16-18 each include an optical waveguide. Optical waveguides have advantages in terms of galvanic separation and explosion protection.

[0067] Furthermore, at least one of the fuel valves 7-9 may be a valve internally regulated by a flow and / or pressure sensor, which determines a target value and regulates the actual value of the flow and / or pressure sensor to the target value. The flow and / or pressure sensor may be implemented as a volume flow sensor, for example, a turbine flow meter and / or a bellows counter and / or a differential pressure sensor. The flow and / or pressure sensor may also be implemented as a mass flow sensor, for example, a thermal mass flow sensor.

[0068] Figure 1 The combustion device 1 is also shown with a first sensor 19. The sensor 19 is preferably arranged in the combustion chamber 2. Advantageously, the first sensor 19 comprises a first temperature sensor 19. Ideally, the first sensor 19 is a first temperature sensor 19.

[0069] The signal line 21 connects the temperature sensor 19 to the control and / or regulating device 13. In a special embodiment, the signal line 21 comprises an optical waveguide. An optical waveguide has advantages in terms of galvanic separation and explosion protection.

[0070] Figure 1 The combustion device 1 is also shown with a second sensor 20. The sensor 20 is preferably arranged in the combustion chamber 2. Advantageously, the second sensor 20 comprises a second temperature sensor 20. Ideally, the second sensor 20 is a second temperature sensor 20.

[0071] The signal line 22 connects the temperature sensor 20 to the control and / or regulating device 13. In a special embodiment, the signal line 22 comprises an optical waveguide. An optical waveguide has advantages in terms of galvanic separation and explosion protection.

[0072] Figure 2 The signal profile 24 of the combustion power 23 is shown along with the sensor signal of the first sensor 19 for a fixed fuel gas at a predetermined, constant mixture ratio. Figure 2 In the embodiment, the sensor 19 is arranged so that the combustion power 23 can be uniquely assigned to the sensor signal. For example, such a signal profile 24 is obtained when the temperature sensor 19 is installed close to the burner 3. This characteristic curve 24 differs from the characteristic curve mentioned in EP1902254B1 in that it has the combustion power 23 along the ordinate instead of the temperature signal. In other words, it is possible to calculate the combustion power 23 by Figure 2 The characteristic curve 24 shown in FIG determines the combustion power 23 from this signal. To this end, the air factor λ is adjusted for each combustion power 23. In a preferred embodiment, the characteristic curve 24 is stored in the control and / or regulating device 13. The distribution is also performed there. Alternatively, the characteristic curve 24 can be stored in the electronic circuit at the first temperature sensor 19 or in any other unit. The evaluation is also performed there.

[0073] Using characteristic curve 24, combustion power 23 can be determined directly, eliminating the need for an air supply sensor. If the fuel gas metering is directly assigned to air supply 5, combustion power 23 and air supply 5 are also directly assigned to each other. Thus, air supply 5 can be adjusted via the aforementioned assignment between combustion power 23 and air supply 5 and the control signal according to line 14. Alternatively, air supply 5 can be regulated in this manner via a closed-loop control circuit. In a preferred embodiment, an air supply signal is present, but the assignment between air supply 5 and this signal is subject to external influences. These could be, for example, changes in air temperature and / or ambient pressure and / or intake / exhaust paths. Typically, signals for which such variations are not compensated are the fan speed signal of fan 4 or the position feedback of an air damper. The assignment between air supply 5 and the sensor signal on line 12 can be periodically recalibrated during operation relative to a reference condition. This recalibration is performed using the sensor signal, combustion power 23 determined via characteristic curve 24, and the assignment between combustion power 23 and air supply 5. This procedure has the advantage that the air supply 5 and, therefore, the combustion power 23 can be changed quickly using the sensor signal on line 12. Correspondingly, the correction via characteristic curve 24 is much slower. The characteristic curve of the gas supply sensor can also be corrected, for example, to determine the fuel supply as a function of the position of the gas flap. In this case, the air control signal on line 14, and therefore the air supply 5, is directly assigned to the fuel metering.

[0074] The course of characteristic curve 24 depends significantly on the sensor's location within combustion chamber 2. Positioning the sensor near or directly on burner 3 has the disadvantage that the dynamics of the sensor signal are affected by the thermal capacity of burner 3. This results in slower control. Furthermore, it is desirable to also use first sensor 19 for flame monitoring. To monitor the flame, sensor 19 must be positioned within or close to the flame region. To monitor the flame, sensor 19 must also react quickly enough, i.e., have a sufficiently short time constant. Figure 3 The characteristic curve 24 of the combustion power 23 is shown as a function of the sensor signal from the line 21 when the sensor 19 is arranged in the combustion chamber 2 or in the flame or in the vicinity of the flame.

[0075] As in Figure 3As can be seen in the diagram, the combustion power 23 can no longer be uniquely assigned to the sensor signal from line 21 via characteristic curve 24. Therefore, a second sensor 20 is installed in the combustion chamber 2, which assigns the sensor signal from line 22 to the combustion power 23 via a characteristic curve 25 that differs from characteristic curve 24. In order to be able to uniquely assign the two sensor values ​​to the combustion power 23 as a function of two variables via the two characteristic curves 24 and 25, for all values ​​of the combustion power 23, within the range of possible combustion power 23 values, a point pair with signals on lines 21 and 22 must only occur once, which is assigned to the corresponding value of the combustion power 23 via the characteristic curves 24 and 25.

[0076] The two characteristic curves 24 and 25 can be stored in the control and / or regulating device 13 as polynomials, for example. An assignment is then made based on a specification in which the different fuel gas powers for the currently recorded signals 21 and 22 are calculated using the characteristic curves 24 and 25. In a preferred embodiment, the characteristic curve 24 is stored as a sequence of value pairs (21 / 23) and (22 / 23). The signals from the lines 21 and 22 can lie between the corresponding, stored value pairs (21 / 23) and (22 / 23). The corresponding, adjacent value pairs (21 / 23) and (22 / 23) are then determined for the signals from the lines 21 and 22. Linear interpolation is performed to determine the combustion power 23.

[0077] The deviation of the combustion power 23 for the signals from lines 21 and 22 is then determined. To this end, the difference between all calculated combustion powers 23 from characteristic curve 24 and all calculated values ​​from the characteristic curve is determined. The two combustion powers 23 with the smallest difference are assigned, for example, the average value or one of the two calculated values. If, for the signals from lines 21 and 22, only one combustion power 23 exists in the characteristic curves 24 and 25 for at least one of the two characteristic curves 24 and 25, this is used as the result.

[0078] Figure 4 Shown that the two characteristic curves can also intersect.As long as the above-mentioned unique allocation condition is met, the combustion power 23 and the air supply 5 can also be determined using this characteristic curve.

[0079] If the unique assignment condition is no longer met, the assignment can be made unique using another signal. This other signal can come from another sensor in combustion chamber 2, which clarifies the assignment in the case of a corresponding signal with a non-unique assignment. This other sensor in combustion chamber 2 is used to register another characteristic curve, using which combustion power 23 can be uniquely determined as described above.

[0080] An air supply sensor and / or a fuel supply sensor are particularly preferred as the third sensor. If the fan speed or the position of the air damper is used as the air supply sensor, the feedback signal on line 15 can be used to clarify the unique assignment despite the inaccuracies described above. This clarification is particularly useful when fuel gas values ​​with identical or similar value pairs are far apart from each other. Advantageously, fuel gas values ​​with identical or similar measured value pairs on lines 21 and 22 are outside the error range of the aforementioned external influences.

[0081] However, the described method and the described device do not only allow the combustion power 23 to be determined from the signals on the lines 21, 22 of the sensors 19, 20 in the combustion chamber 2 and, accordingly, the air supply 5. Similarly, the described method and the described device do not only allow the fuel supply 6 of a fixed, predetermined mixture of fuel and gas to be determined. The described means also allow the fuel, in particular the fuel gas, to be metered in the correct ratio to the air supply 5. This presupposes that the air supply 5 and the fuel supply 6 can be freely adjusted by the corresponding actuators 4, 9 for the air and fuel. Figure 5 The response of the signals of lines 21 and 22 over combustion power 23 is shown. Figure 5 This refers to the case where the mixture becomes too lean compared to the adjusted air coefficient λ, that is, the fuel gas is too little relative to the target value. soll , characteristic curves 24 and 25 correspond to the sensor signals on lines 21 and 22 for different combustion powers 23. If the mixture becomes leaner, characteristic curve 26 for sensor 19 and characteristic curve 27 for sensor 20 result. As a result of the leaning, characteristic curve 24 is usually shifted relative to characteristic curve 25 by a different value than characteristic curve 26 is shifted relative to characteristic curve 27.

[0082] In principle, for the desired correction of the air factor λ, instead of characteristic curves 24 and 25, two characteristic ranges can be registered as a function of the combustion power 23 with the corresponding temperature values ​​from lines 21 and 22 and the corresponding air factor λ. The combustion power 23 and the air factor λ can then be uniquely determined. This presupposes that for each point of the combustion power 23 and the air factor λ, the signal value pair from lines 21 and 22 occurs only once within the two ranges across all the resulting point pairs. Once a point pair has been determined, the current combustion power 23 and the current air factor λ can be directly assigned to it. The two actuators 4 and 9 can then be calibrated to the target values.

[0083] The conditions for unique determination mentioned for this correction cannot always be met for these two regions. Therefore, a third signal is often required to uniquely determine the combustion power 23 and the air factor λ. This third signal can come from another sensor in the combustion chamber. However, it is preferably an air supply signal from line 14 or 15. For example, this third signal can come from the fan speed feedback from the fan speed sensor 12 in the fan or the position of the air damper. Similarly, this third signal can come from the state of the fuel actuator, in particular the position of the gas damper 9. The additional third sensor value makes it significantly easier to position the sensor in the combustion chamber to meet the requirement for uniquely assigning the signal to the combustion power 23 and / or the air factor λ within a value range.

[0084] Correspondingly, when the mixture is relative to the target air coefficient λ soll For richer mixtures, the combustion power 23 and / or the air ratio λ are corrected. The corresponding characteristic curve for a richer mixture is then on the other side of the corresponding characteristic curve 24 or 25 .

[0085] Registering both ranges in the control and / or regulating device 13 is complex. Therefore, in a preferred approach, only two functions 24, 25 of the combustion power 23, which depend on the two sensor signals 21, 22 of the sensors 19, 20, are registered. The characteristic curves 24, 25 can each be registered as a polynomial that depends on a plurality of measurement signals. The characteristic curves 24, 25 can also be registered in the control and / or regulating device 13 as a sequence of points. Linear interpolation is preferably performed between these points. Signals from other sensors in the combustion chamber and / or in the air supply 5 and / or in the fuel supply 6, such as the fan speed sensor 12, may also be included.

[0086] In a first variant, regulation is performed by keeping the air supply 5 constant or nearly constant via the air actuator 4. The fuel supply 6 is varied via the fuel actuator 9 until the determined value of the combustion power 23 from the two characteristic curves 24, 25 lies within a defined threshold value.

[0087] In the second variant, the fuel supply 6 is kept constant or almost constant by the fuel actuator 9. The air supply 5 is varied by the air actuator 4 until the determined value of the combustion power 23 from the two characteristic curves 24, 25 lies within a defined threshold value.

[0088] The direction of control is determined by the difference between the two determined combustion powers 23, for example by detecting that the difference is decreasing. If there are other sensor values, the sum of the calculated squared differences is compared with a predefined threshold value, for example. This ensures that the actual air factor λ isist At the target air ratio λ predefined according to the characteristic curves 24 and 25 soll In the next step, the combustion power P is determined ist , for example by calculating the arithmetic mean of the two combustion powers 23 determined with the aid of the characteristic curves 24 and 25. The air actuator 4 and at least one fuel actuator 7-9 are then adjusted together until a predetermined combustion power P is reached. soll The air coefficient λ may deviate slightly due to the combustion power adjustment. In this case, the air coefficient λ can be adjusted as described above by adjusting at least one fuel actuator 7-9 or air actuator 4 at the target combustion power P soll is readjusted in case of

[0089] In the third variant, the combustion power 23 and the air ratio λ are controlled directly by adjusting the two actuators 4, 7-9. As in the first and second variants, the corresponding threshold value for the difference in combustion power 23 is stored as a standard in the multi-circuit control.

[0090] In the above variant, "almost constant" means that the first actuator is adjusted more slowly than the second actuator. Thus, the air coefficient λ can always be reached. soll and combustion power P soll Target value. In the second variant, at least one fuel actuator 7-9 is adjusted more slowly than the air actuator 4. In the first variant, the air actuator 4 is adjusted more slowly than the at least one fuel actuator 7-9. Preferably, a process is selected in which predetermined different speeds of the actuators 4 and 7-9 are used. The at least one fuel actuator 7-9, which has a stepper motor drive, is faster than the air actuator 4, which has a motor-adjustable fan impeller and a corresponding moment of inertia. Therefore, variant 1 is generally selected.

[0091] The described procedure ensures that during a change in combustion power, the air coefficient λ is first corrected and only then the combustion power 23 is corrected. In this way, even during a change in combustion power, the correct air coefficient λ is always used. soll For this reason, the characteristic curves 24, 25 also correspond to the predetermined air coefficient λ soll The characteristic curve of the combustion power 23 for the corresponding sensors 19 and 20 under the condition of . soll The combustion power 23 has a wide range of arbitrary variations defined by the characteristic curves 24 and 25. soll In the case of the combustion power 23, for example, an increasing or decreasing profile can be employed. In a special embodiment, the target air coefficient λsoll The variation process of combustion power 23 is constant.

[0092] exist Figure 6 The air coefficient target value λ is shown in soll The characteristic curve 24 of the first sensor 19 is shown in the case of a lean air ratio value 26. soll and at a lean air factor value 27. In this profile, a unique assignment of the sensor signals on lines 21 and 22 to the air factor λ can be reliably achieved, in particular using the third sensor signal. A unique assignment to the combustion power 23 is also possible. The third sensor signal can, for example, be the fan speed feedback of the fan 4 via line 15.

[0093] Air actuator 4 Fuel actuator 9 Air actuator 4 Air actuator 4 Fuel actuator 9 Fuel actuator 9 Air actuator 4

[0094] During the regulation of the combustion power 23 based on the changed combustion power requirement, the air actuator 4 can be moved on a predetermined characteristic curve of the air supply sensor 12. This predetermined characteristic curve can be based on feedback of the fan speed, for example, or it can be a characteristic curve based on feedback of the position of the air damper. Figure 7 , a characteristic curve 28 of the fan speed feedback 15 stored in the control and / or regulating device 13 is shown as a reference characteristic curve. The characteristic curve 28 relates to specific and / or well-defined ambient conditions.

[0095] Similar signals for the reference conditions apply to the control signal or the air flap status along line 14 of the fan motor and to the position signal fed back along line 15. The signals are pre-linearized using characteristic curves stored in the control and / or regulating device 13 for the control signal or fed-back position signal of the air supply 5.

[0096] If the current combustion power 23 is determined after correcting the air factor λ, characteristic curve 28 can be adapted to the current ambient conditions. Such ambient conditions include, for example, changes in air temperature and / or air pressure and / or intake / exhaust paths. For the currently measured fan speed or reference control, the air supply 5 is known as a direct function of combustion power 23. "Direct function" here means that the air supply 5 does not depend on any independent variables of the function other than combustion power 23. The supply determined from characteristic curve 28 is also known. Therefore, for the current air supply 5, a correction factor can be determined as the ratio of the two signals. Due to the zero crossing of the characteristic curve of the reference air supply signal or fan speed feedback with respect to the air supply 5, characteristic curve 28 is corrected to characteristic curve 29. Each characteristic curve value is multiplied by the determined correction factor. This method allows for rapid adjustment of combustion power 23 and air supply 5 via the corrected characteristic curve 29. Simultaneously, the air supply 5 can be corrected more slowly via characteristic curves 24 and 25. This decouples the two processes. By means of the mean value filter, fluctuations in the measured value of the combustion power 23 can also be averaged, and thus the combustion power 23 can be stably determined. In this way, the combustion power 23 can also be corrected. In this case, the speed of the change in the combustion power is not affected.

[0097] exist Figure 8 shows the characteristic curves along which the fuel actuator 9 is shifted. Two reference characteristic curves 30 and 31, determined for different pressures and / or different fuel gas compositions, are stored in the control and / or regulating device 13. Characteristic curves 30 and 31 describe the gas metering signal associated with the air supply 5, represented by the corrected signal value of the air supply 5 or the combustion power 23. Here, the gas metering signal represents the fuel supply and / or gas supply. These two characteristic curves 30 and 31 are determined under reference conditions, that is, for specific inlet pressures and / or fuel gas compositions. Characteristic curve 30 is determined using a high-calorie fuel or fuel gas and / or a high inlet pressure. Characteristic curve 31 is determined using a low-calorie fuel or fuel gas and / or a low inlet pressure. During operation, the current fuel gas-to-air ratio is determined by shifting the signals from sensors 19 and 20 in the combustion chamber 2, as described above. These signals are shifted to a unique value pair on the two characteristic curves 24 and 25 by changing the fuel actuator 9 until the target is achieved.

[0098] Using the current, corrected fuel supply 6 for the assigned air supply 5, a ratio can be determined by weighted average. The fuel metering signal and / or the gas metering signal is subject to this ratio. This ratio represents the current fuel and / or gas parameters, such as the fuel gas composition and / or the inlet pressure and / or the fuel gas temperature. Because the same ratio applies to all combustion power signals for the same fuel and / or gas parameters, a characteristic curve 32 can be calculated. Along characteristic curve 32, the fuel actuator 9 can rapidly change its combustion power 23 depending on the current fuel and / or gas parameters. Characteristic curve 32 allows the fuel actuator 9 to rapidly change its state depending on the current fuel and / or gas parameters.

[0099] If at least one fuel and / or gas parameter changes, this is achieved by correcting the weighting ratios by adapting the sensor signals on lines 21 and 22 to the characteristic curves 24 and 25 described above. A new characteristic curve can be calculated using the new weighting parameters. The method for calculating the corrected characteristic curve 32 for controlling the fuel actuator 9 under different fuel and / or gas parameters corresponds to the method described in EP 1 154 202 B2. The described method can also correct for changes in the fuel composition or gas inlet pressure, as these parameters influence the air factor λ. The air factor λ is adjusted by adapting the characteristic curves 24 and 25 described above.

[0100] Another advantage of this method is that flames can be monitored using these two sensors 19, 20, so as to detect flameouts, for example. For this purpose, the two signals 21, 22 generated by the sensors 19, 20 are also used to detect the presence or absence of a flame in addition to the regulation of the relevant air factor λ and the combustion power 23.

[0101] In this way, it is possible to evaluate whether at least one signal 21 or 22 falls below a threshold value. A different threshold value can be selected for sensor signal 21 than for sensor signal 22. If it falls below the corresponding threshold value, for example, the temperature is so low that a flame can no longer burn. A signal is generated, which is used to close safety shutoff valves 8 and 9 via lines 16 and 17 so that no combustible fuel can escape unburned. In another variant, the difference between the two signals 21 and 22 is calculated, but it must be noted that the two signals do not have the same temperature value during operation. If the flame is now extinguished, the two temperatures will quickly equalize. In other words, if the difference between the two signals falls below a predetermined threshold value, this is detected as a fire, ensuring that the safety shutoff valves 8 and 9 are closed.

[0102] In other words, the present disclosure teaches a method for regulating a combustion device (1), the combustion device (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the following steps:

[0103] recording a first signal from a first temperature sensor (19);

[0104] recording a second signal from a second temperature sensor (20);

[0105] determining at least one first combustion power as a function of the first signal using a first characteristic curve (24), which describes the course of the combustion power as a function of the signal of the first temperature sensor (19) for the first temperature sensor (19);

[0106] determining at least one second combustion power as a function of the second signal using a second characteristic curve (25), which describes the course of the combustion power as a function of the signal of the second temperature sensor (20) for the second temperature sensor (20);

[0107] determining the current combustion power of the combustion device (1) based on the at least one first combustion power and the at least one second combustion power; and

[0108] The current combustion power of the combustion device (1) is adjusted to the target power of the combustion device (1).

[0109] The present disclosure also teaches a method among the above methods, which comprises the following steps:

[0110] The current combustion power of the combustion device (1) is determined as an arithmetic mean of the at least one first combustion power and the at least one second combustion power.

[0111] The present disclosure also teaches a method among the above methods, which comprises the following steps:

[0112] The current combustion power of the combustion device (1) is determined as a geometric mean of the at least one first combustion power and the at least one second combustion power.

[0113] Preferably, the first characteristic curve (24) is different from the second characteristic curve (25).

[0114] In one embodiment, a first characteristic curve (24) assigns at least two different combustion powers to the first signal. That is, the assignment of the first signal to the combustion power is not unique according to the first characteristic curve (24). The assignment according to the first characteristic curve (24) is not injective. In one embodiment, a second characteristic curve (25) assigns at least two different combustion powers to the second signal. That is, the assignment of the second signal to the combustion power is not unique according to the second characteristic curve (25). The assignment according to the second characteristic curve (25) is not injective.

[0115] The present disclosure also teaches a method for regulating a combustion device (1), the combustion device (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the following steps:

[0116] recording a first signal from a first temperature sensor (19);

[0117] recording a second signal from a second temperature sensor (20);

[0118] estimating at least one first combustion power based on the first signal using a first characteristic curve (24), which describes the course of the combustion power as a function of the signal of the first temperature sensor (19) for the first temperature sensor (19);

[0119] estimating at least one second combustion power based on the second signal using a second characteristic curve (25) which describes the course of the combustion power with respect to the signal of the second temperature sensor (20);

[0120] determining the current combustion power of the combustion device (1) based on the at least one first combustion power and the at least one second combustion power; and

[0121] The current combustion power of the combustion device (1) is adjusted to the target power of the combustion device (1).

[0122] The present disclosure also teaches a method for regulating a combustion device (1), the combustion device (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the following steps:

[0123] recording a first signal from a first temperature sensor (19);

[0124] recording a second signal from a second temperature sensor (20);

[0125] estimating at least one first air factor λ based on the first signal using a first characteristic curve, which describes the course of the air factor λ with the signal of the first temperature sensor (19) for the first temperature sensor (19);

[0126] estimating at least one second air factor λ based on the second signal using a second characteristic curve, which describes the course of the air factor λ with the signal of the second temperature sensor (20) for the second temperature sensor (20);

[0127] Determining the current combustion power of the combustion device (1) based on the at least one first air coefficient λ and the at least one second air coefficient λ; and

[0128] The current air coefficient λ of the combustion device (1) is adjusted to the target power λ of the air coefficient soll .

[0129] The present disclosure also teaches a method in the above method, wherein the combustion device (1) additionally comprises at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), and adjusting the current combustion power of the combustion device (1) to the target power of the combustion device (1) comprises the following steps:

[0130] Calculating the difference between the current combustion power of the combustion device (1) and the target power of the combustion device (1);

[0131] generating an actuator signal based on the difference; and

[0132] The actuator signal is sent to the at least one actuator.

[0133] The combustion device (1) preferably has an air supply channel, which is fluidically connected to the combustion chamber (2). The air actuator (4) acts on the air supply channel. The combustion device (1) preferably has a fuel supply channel, which is fluidically connected to the combustion chamber (2). The air actuators (7-9) act on the fuel supply channel.

[0134] The present disclosure also teaches a method among the above methods, which comprises the following steps:

[0135] determining at least one third combustion power based on the first signal using a first characteristic curve (24), wherein the first characteristic curve (24) assigns at least two different combustion powers to the first signal, such that the at least one third combustion power differs from the at least one first combustion power;

[0136] calculating a first difference between the at least one first combustion power and the at least one second combustion power;

[0137] calculating a second difference between the at least one third combustion power and the at least one second combustion power;

[0138] comparing the first difference to the second difference;

[0139] if the first difference is less than the second difference, selecting the at least one first combustion power;

[0140] If the second difference is less than the first difference, selecting the at least one third combustion power; and

[0141] The current combustion power of the combustion device (1) is determined based on the selected combustion power and the at least one second combustion power.

[0142] The present disclosure also teaches a method among the above methods, which comprises the following steps:

[0143] determining at least one third combustion power based on the first signal using a first characteristic curve (24), wherein the first characteristic curve (24) assigns at least two different combustion powers to the first signal, such that the first combustion power differs from the third combustion power;

[0144] calculating a first difference between the at least one first combustion power and the at least one second combustion power;

[0145] calculating a second difference between the at least one third combustion power and the at least one second combustion power;

[0146] comparing the first difference to the second difference;

[0147] if the first difference is less than the second difference, selecting the at least one first combustion power;

[0148] If the second difference is smaller than the first difference or if the second difference is equal to the first difference, the at least one third combustion power is selected; and the current combustion power of the combustion device (1) is determined based on the selected combustion power and the at least one second combustion power.

[0149] The present disclosure also teaches one of the above methods including the selected combustion power, the method comprising the steps of:

[0150] The current combustion power of the combustion device (1) is determined as an arithmetic mean of the selected combustion power and the at least one second combustion power.

[0151] The present disclosure also teaches one of the above methods including the selected combustion power, the method comprising the steps of:

[0152] The current combustion power of the combustion device (1) is determined as a geometric mean of the selected combustion power and the at least one second combustion power.

[0153] The present disclosure also teaches a method in the above method, wherein the combustion device (1) additionally comprises another sensor in the combustion chamber (2), wherein the another sensor in the combustion chamber (2) is different from the first temperature sensor (19) and different from the second temperature sensor (20), and the method comprises the following steps:

[0154] recording another combustion signal of the another sensor;

[0155] When using another characteristic curve, at least one other combustion power is determined based on the other combustion signal, and the other characteristic curve describes the change process of the combustion power with the signal of the other sensor for the other sensor; and based on the at least one first combustion power, the at least one second combustion power and the at least one other combustion power, the current combustion power of the combustion device (1) is determined.

[0156] The present disclosure also teaches a method in the above method, wherein the combustion device (1) additionally comprises another sensor in the combustion chamber (2), wherein the another sensor in the combustion chamber (2) is different from the first temperature sensor (19) and different from the second temperature sensor (20), and the method comprises the following steps:

[0157] recording another combustion signal of the another sensor;

[0158] When using another characteristic curve, at least one other combustion power is estimated based on the other combustion signal, and the other characteristic curve describes the change process of the combustion power with the signal of the other sensor for the other sensor; and based on the at least one first combustion power, the at least one second combustion power and the at least one other combustion power, the current combustion power of the combustion device (1) is determined.

[0159] In one embodiment, the further sensor in the combustion chamber (2) comprises a further temperature sensor in the combustion chamber (2). In a particular embodiment, the further sensor in the combustion chamber (2) is a further temperature sensor in the combustion chamber (2). In one embodiment, the further sensor in the combustion chamber (2) comprises an ionization electrode in the combustion chamber (2). In a particular embodiment, the further sensor in the combustion chamber (2) is an ionization electrode in the combustion chamber (2).

[0160] In one embodiment, the further characteristic curve assigns at least two different combustion powers to the further signal. That is, the assignment of the further signal to the combustion power is not unique according to the further characteristic curve. The assignment according to the further characteristic curve is not injective.

[0161] The first characteristic curve (24), the second characteristic curve (25) and the further characteristic curve are preferably different in pairs.

[0162] The present disclosure also teaches one of the above methods, wherein the combustion device (1) additionally comprises at least one supply channel fluidically connected to the combustion chamber (2), and a supply signal device (4, 7-9, 12) operatively connected to the fluid in the at least one supply channel, wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2), and the method comprises the following steps:

[0163] recording supply signals from supply signal devices (4, 7-9, 12);

[0164] The supply-based combustion power is determined based on the supply signal when a supply-based characteristic curve is used, which describes the course of the combustion power as a function of the signal of the supply signal device (4, 7-9, 12) for the supply signal device (4, 7-9, 12); and

[0165] The current combustion power of the combustion device (1) is determined based on the at least one first combustion power, the at least one second combustion power and the supply-based combustion power.

[0166] The present disclosure also teaches one of the above methods, wherein the combustion device (1) additionally comprises at least one supply channel fluidically connected to the combustion chamber (2), and a supply signal device (4, 7-9, 12) operatively connected to the fluid in the at least one supply channel, wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2), and the method comprises the following steps:

[0167] recording supply signals from supply signal devices (4, 7-9, 12);

[0168] The supply-based combustion power is estimated based on the supply signal when a supply-based characteristic curve is used, which describes the change of the combustion power with the signal of the supply signal device (4, 7-9, 12) for the supply signal device (4, 7-9, 12); and

[0169] The current combustion power of the combustion device (1) is determined based on the at least one first combustion power, the at least one second combustion power and the supply-based combustion power.

[0170] In one embodiment, the supply-based characteristic curve assigns exactly one combustion power to the supply signal. That is, the assignment of the supply signal to the combustion power is not unique according to the supply-based characteristic curve. The assignment according to the supply-based characteristic curve is not injective. In a special case, the assignment according to the supply-based characteristic curve is also surjective.

[0171] It is provided that the at least one supply channel includes at least one supply channel selected from the following channels:

[0172] - air supply channels; and

[0173] - a fuel supply channel, in particular a fuel supply channel. It is also provided that the at least one supply channel is exactly one supply channel selected from the following channels:

[0174] - air supply channels; and

[0175] A fuel supply channel, in particular a fuel supply channel.

[0176] The first characteristic curve (24), the second characteristic curve (25) and the supply-based characteristic curve are preferably different in pairs.

[0177] According to one embodiment, the supply signaling device (4, 7-9, 12) is an air supply sensor in or on the air supply channel. The air supply sensor can, for example, comprise a turbine flowmeter and / or a bellows counter and / or a differential pressure sensor and / or a mass flow sensor. In a particular embodiment, the air supply sensor is a turbine flowmeter and / or a bellows counter and / or a mass flow sensor. In this case, the air supply sensor is fluidically connected to the fluid in the air supply channel, in particular to the air. The air supply sensor is also operatively connected to the fluid in the air supply channel, in particular to the air, because the fluid acts on the air supply sensor. According to one embodiment, the supply signaling device (4, 7-9, 12) comprises a fan (4) that acts on the air supply channel. The fan (4) can in particular be a fan (4) driven by an electric motor. The fan (4) is designed to signal, in particular to communicate, its fan speed. The fan speed of the fan (4) is a measure of the air supply (5). According to another embodiment, the supply signal device (4, 7-9, 12) is a fuel supply sensor in or on the fuel supply channel. The fuel supply sensor can, for example, include a turbine flowmeter and / or a bellows counter and / or a differential pressure sensor and / or a mass flow sensor. In a particular embodiment, the fuel supply sensor is a turbine flowmeter and / or a bellows counter and / or a mass flow sensor. In this case, the fuel supply sensor is fluidically connected to the fluid in the fuel supply channel, in particular to the fuel and / or the fuel gas. The fuel supply sensor is also effectively connected to the fluid in the fuel supply channel, in particular to the fuel and / or the fuel gas, because the fluid acts on the fuel supply sensor. According to yet another embodiment, the supply signal device (4, 7-9, 12) includes at least one fuel actuator (7-9) and / or at least one valve (7-9), the at least one fuel actuator or the at least one valve acting on the fuel supply channel. The at least one fuel actuator (7-9) and / or the at least one valve (7-9) can in particular be at least one fuel valve (7-9) and / or at least one fuel gas valve (7-9). The at least one fuel actuator (7-9) and / or the at least one valve (7-9) are designed to signal, in particular to communicate, their state. The state of the at least one fuel actuator (7-9) and / or the at least one valve (7-9) is a measure of the fuel supply (6).

[0178] The present disclosure also teaches a method in the above method, wherein the combustion device (1) additionally comprises at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising the following steps:

[0179] sending a change signal to the at least one actuator;

[0180] After sending the change signal to the at least one actuator:

[0181] recording a third signal from the first temperature sensor (19),

[0182] recording a fourth signal from the second temperature sensor (20),

[0183] determining at least one third combustion power based on the third signal using the first characteristic curve (24);

[0184] When using the second characteristic curve (25), at least one fourth combustion power is determined based on the fourth signal; and the current combustion power of the combustion device (1) is determined based on the at least one first combustion power, the at least one second combustion power, the at least one third combustion power and the at least one fourth combustion power.

[0185] The present disclosure also teaches a method in the above method, wherein the combustion device (1) additionally comprises at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising the following steps:

[0186] sending a change signal to the at least one actuator;

[0187] After sending the change signal to the at least one actuator:

[0188] recording a third signal from the first temperature sensor (19),

[0189] recording a fourth signal from the second temperature sensor (20),

[0190] estimating at least one third combustion power based on the third signal using the first characteristic curve (24);

[0191] estimating at least one fourth combustion power based on the fourth signal using the second characteristic curve (25);

[0192] Determining another current combustion power of the combustion device (1) based on the at least one first combustion power, the at least one second combustion power, the at least one third combustion power and the at least one fourth combustion power; and

[0193] The current combustion power of the combustion device (1) is adjusted to the target power of the combustion device (1).

[0194] The present disclosure also teaches a method in the above method, wherein the combustion device (1) additionally comprises at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising the following steps:

[0195] sending a change signal to the at least one actuator;

[0196] After sending the change signal to the at least one actuator:

[0197] recording a third signal from the first temperature sensor (19),

[0198] recording a fourth signal from the second temperature sensor (20),

[0199] determining at least one third combustion power based on the third signal using the first characteristic curve (24);

[0200] determining at least one fourth combustion power based on the fourth signal using the second characteristic curve (25);

[0201] Determining another current combustion power of the combustion device (1) based only on the at least one third combustion power and the at least one fourth combustion power; and

[0202] The further current combustion power of the combustion device (1) is adjusted to the target power of the combustion device (1).

[0203] The present disclosure also teaches a method in the above method, wherein the combustion device (1) additionally comprises at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising the following steps:

[0204] sending a change signal to the at least one actuator;

[0205] After sending the change signal to the at least one actuator:

[0206] recording a third signal from the first temperature sensor (19),

[0207] recording a fourth signal from the second temperature sensor (20),

[0208] estimating at least one third combustion power based on the third signal using the first characteristic curve (24);

[0209] estimating at least one fourth combustion power based on the fourth signal using the second characteristic curve (25);

[0210] Determining another current combustion power of the combustion device (1) based only on the at least one third combustion power and the at least one fourth combustion power; and

[0211] The further current combustion power of the combustion device (1) is adjusted to the target power of the combustion device (1).

[0212] The present disclosure also teaches one of the above methods including another current combustion power, wherein the combustion device (1) additionally includes at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), and adjusting the another current combustion power of the combustion device (1) to the target power of the combustion device (1) includes the following steps:

[0213] Calculating the difference between another current combustion power of the combustion device (1) and the target power of the combustion device (1);

[0214] generating an actuator signal based on the difference; and

[0215] The actuator signal is sent to the at least one actuator.

[0216] The present disclosure also teaches one of the above methods including a changing signal, the method comprising the steps of:

[0217] After sending the change signal to the at least one actuator:

[0218] The state of the at least one actuator is changed.

[0219] The present disclosure also teaches one of the above methods including a changing signal, the method comprising the steps of:

[0220] After sending the change signal to the at least one actuator:

[0221] The fan speed of the at least one actuator is varied.

[0222] The combustion device (1) preferably has an air supply channel, which is fluidically connected to the combustion chamber (2). The air actuator (4) acts on the air supply channel. The combustion device (1) preferably has a fuel supply channel, which is fluidically connected to the combustion chamber (2). The air actuators (7-9) act on the fuel supply channel.

[0223] The present disclosure also teaches a combustion device (1), comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); at least one supply channel fluidically connected to the combustion chamber (2); at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), wherein the at least one actuator acts on the at least one supply channel, the combustion device (1) additionally comprising a regulating and / or control device (13), which is communicatively connected to the first temperature sensor (19), the second temperature sensor (20) and the at least one actuator, wherein the regulating and / or control device (13) is designed to perform the steps of one of the above-mentioned methods.

[0224] The present disclosure also teaches a combustion device (1), comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2) and a further temperature sensor in the combustion chamber (2), wherein the first temperature sensor (20), the second temperature sensor (19) and the further temperature sensor are different in pairs; at least one supply channel fluidically connected to the combustion chamber (2); at least one actuator selected from the group consisting of an air actuator (4) and a fuel actuator (7-9), wherein the at least one actuator acts on the at least one supply channel, the combustion device (1) additionally comprising a regulating and / or control device (13), which is communicatively connected to the first temperature sensor (19), the second temperature sensor (20), the further temperature sensor and the at least one actuator, wherein the regulating and / or control device (13) is designed to perform the steps of one of the above-mentioned methods including the further temperature sensor in the combustion chamber (2).

[0225] The present disclosure also teaches a combustion device (1), comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); at least one supply channel connected to the fluid of the combustion chamber (2); a supply signal device (4, 7-9, 12) operatively connected to the fluid in the at least one supply channel, wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2); a device selected from the group consisting of air An actuator (4) and at least one of the fuel actuators (7-9), wherein the at least one actuator acts on the at least one supply channel, the combustion device (1) additionally comprising a regulating and / or control device (13), which is communicatively connected to the first temperature sensor (19), the second temperature sensor (20), the supply signal device (4, 7-9, 12) and the at least one actuator, wherein the regulating and / or control device (13) is designed to perform the steps of one of the above-mentioned methods including the supply signal device (4, 7-9, 12).

[0226] The present disclosure also teaches a computer program product comprising instructions causing a combustion device (1) to perform the method steps of one of the above methods.

[0227] The present disclosure also teaches a computer program product comprising instructions causing a regulating and / or controlling device (13) of one of the above-mentioned combustion plants (1) to execute the method steps of one of the above-mentioned methods.

[0228] The present disclosure also teaches a computer program comprising instructions which cause the regulating and / or control device (13) of one of the above-mentioned combustion plants (1) to execute the method steps of one of the above-mentioned methods.

[0229] The present disclosure also teaches a computer program product comprising instructions causing one of the above-mentioned combustion devices (1) to perform the method steps of one of the above-mentioned methods.

[0230] The present disclosure also teaches a computer program comprising instructions causing one of the above-mentioned combustion devices (1) to perform the method steps of one of the above-mentioned methods.

[0231] The present disclosure also teaches a computer-readable medium having stored thereon one of the above-mentioned computer programs.

[0232] The present disclosure also teaches a computer-readable medium having stored thereon one of the above-mentioned computer program products.

[0233] The computer readable media are preferably tangible. Ideally, these computer readable media are non-volatile.

[0234] The present disclosure also teaches a method for regulating a combustion device (1), the combustion device (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); an air actuator (4) for generating an air supply (5); and at least one fuel actuator (7-9) for generating a fuel supply (6), the method comprising the steps of:

[0235] regulating the at least one fuel actuator (7-9) and / or the air actuator (4);

[0236] recording a first signal from a first temperature sensor (19);

[0237] determining at least one first combustion power as a function of the first signal using a first characteristic curve (24), which describes the course of the combustion power as a function of the signal of the first temperature sensor (19) for the first temperature sensor (19);

[0238] recording a second signal from a second temperature sensor (20);

[0239] determining at least one second combustion power as a function of the second signal using a second characteristic curve (25), which describes the course of the combustion power as a function of the signal of the second temperature sensor (20) for the second temperature sensor (20);

[0240] A comparison value is determined based on the determined first combustion power and based on the determined second combustion power; and the above steps are repeated until the determined comparison value is smaller than a predetermined threshold value.

[0241] The present disclosure also teaches a method for regulating a combustion device (1), the combustion device (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); an air actuator (4) for generating an air supply (5); and at least one fuel actuator (7-9) for generating a fuel supply (6), the method comprising the steps of:

[0242] recording a first signal from a first temperature sensor (19);

[0243] determining at least one first combustion power as a function of the first signal using a first characteristic curve (24), which describes the course of the combustion power as a function of the signal of the first temperature sensor (19) for the first temperature sensor (19);

[0244] recording a second signal from a second temperature sensor (20);

[0245] determining at least one second combustion power as a function of the second signal using a second characteristic curve (25), which describes the course of the combustion power as a function of the signal of the second temperature sensor (20) for the second temperature sensor (20);

[0246] determining a comparison value based on the determined first combustion power and based on the determined second combustion power;

[0247] The at least one fuel actuator (7-9) and / or the air actuator (4) is adjusted according to the comparison value; and the above steps are repeated until the determined comparison value is smaller than a predetermined threshold value.

[0248] The present disclosure also teaches one of the above methods for regulating a combustion device (1), the combustion device (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); an air actuator (4) for generating an air supply (5); and at least one fuel actuator (7-9) for generating a fuel supply (6), the combustion device (1) additionally comprising at least one further temperature sensor in the combustion chamber (2), wherein the further temperature sensor is different from the first temperature sensor (19) and also different from at least the second temperature sensor (20), the method comprising the following steps:

[0249] regulating the at least one fuel actuator (7-9) and / or the air actuator (4);

[0250] In addition to recording the signals of the first and second temperature sensors (19, 20), recording another combustion signal of the other temperature sensor in the combustion chamber (2);

[0251] When using another characteristic curve, at least one further combustion power is determined based on the further combustion signal, the further characteristic curve describing, for the further sensor, the course of the combustion power as a function of the signal of the further sensor; and a comparison value is determined based on the determined first combustion power and based on the determined second combustion power and based on the at least one further combustion power; and

[0252] The above steps are repeated until the determined comparison value is smaller than a predetermined threshold value.

[0253] The present disclosure also teaches one of the above methods for regulating a combustion device (1), the combustion device (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); an air actuator (4) for generating an air supply (5); and at least one fuel actuator (7-9) for generating a fuel supply (6), the combustion device (1) additionally comprising at least one further temperature sensor in the combustion chamber (2), wherein the further temperature sensor is different from the first temperature sensor (19) and also different from at least the second temperature sensor (20), the method comprising the following steps:

[0254] In addition to recording the signals of the first and second temperature sensors (19, 20), recording another combustion signal of the other temperature sensor in the combustion chamber (2);

[0255] When using a further characteristic curve, at least one further combustion power is determined as a function of the further combustion signal, the further characteristic curve describing, for the further sensor, the course of the combustion power as a function of the signal of the further sensor; and a comparative value is determined as a function of the determined first combustion power, as a function of the determined second combustion power, and as a function of the at least one further combustion power;

[0256] The at least one fuel actuator (7-9) and / or the air actuator (4) is adjusted according to the comparison value; and the above steps are repeated until the determined comparison value is smaller than a predetermined threshold value.

[0257] The present disclosure teaches one of the above methods for regulating a combustion device (1) with the inclusion of a comparison value, wherein the comparison value is calculated as the value of the difference between two determined combustion powers.

[0258] The present disclosure teaches one of the above methods for regulating a combustion device (1) with the inclusion of a comparison value, wherein the comparison value is calculated as the sum of the squared differences of all calculated combustion powers.

[0259] The present disclosure teaches a method for regulating a combustion device (1) in which the state of the air actuator and / or the fuel actuator is determined by the fact that a determined comparison value decreases when regulating the air actuator (4) and / or the at least one fuel actuator (7-9).

[0260] By means of the above disclosure, the air ratio λ of the combustion system (1) is adjusted according to the air ratio λ adjusted to the characteristic curves (24, 25).

[0261] The present disclosure teaches one of the above methods, wherein the combustion power of the combustion device (1) is calculated as a function of the average value of two combustion powers determined on the basis of the characteristic curves (24, 25).

[0262] The present disclosure teaches one of the above methods, wherein the combustion power of the combustion device (1) is calculated based on the average value of at least two combustion powers determined from each characteristic curve (24, 25).

[0263] The present disclosure teaches one of the above methods, wherein one of the calculated combustion powers is selected as the combustion power of the combustion device (1).

[0264] The present disclosure teaches a method among the above methods, wherein the value of the difference between the calculated combustion power of the combustion device (1) and a predetermined target value is calculated.

[0265] The present disclosure teaches one of the above methods, wherein the air actuator (4) and the at least one fuel actuator (7-9) are adjusted so that the value of the difference between the calculated combustion power and the predetermined combustion power is below another, defined threshold value.

[0266] The determined combustion power of the combustion system (1) is adjusted to a predetermined target value using the above disclosure.

[0267] The present disclosure teaches one of the above methods, wherein the combustion device (1) comprises an additional air supply sensor (12),

[0268] wherein a function of a feedback signal regarding the combustion power of the combustion device (1) is stored for the air supply sensor (12); and

[0269] The function is corrected as a function of the currently determined combustion power.

[0270] The present disclosure teaches one of the above methods including an air supply sensor (12),

[0271] wherein the signal of the air supply sensor (12) is recorded;

[0272] wherein the correction of the function is performed by a multiplication factor which is applied to each value of the function stored; and

[0273] The multiplication factor is determined as a function of the quotient of the determined combustion power and a function value calculated from the recorded measured values.

[0274] The present disclosure teaches one of the above methods, wherein for rapid changes in combustion power a function corrected by the multiplication factor is used for the air actuator (4).

[0275] The present disclosure teaches one of the above methods,

[0276] wherein for two fuels having different fuel parameters, characteristic curves of the fuel actuator control depending on the calculated combustion power of the combustion device (1) are respectively stored;

[0277] wherein a weighting factor is calculated as a function of two stored characteristic curves and a control value resulting from the determination of the state of the fuel actuator; and

[0278] A characteristic curve for regulating the at least one fuel actuator (7-9) is calculated as a function of the weighting factor.

[0279] The present disclosure teaches one of the above methods including a weighting factor, wherein the weighting factor is a weighting factor for a weighted arithmetic mean, which is calculated based on the fuel actuator state at the calculated combustion power as a result of the averaging and two stored characteristic curve values ​​for the fuel actuator control at the calculated combustion power as the value to be weighted.

[0280] The present disclosure teaches one of the above methods, wherein for rapid changes in combustion power a calculated characteristic curve is used for the at least one fuel actuator (7-9) which is dependent on the combustion power of the combustion device (1).

[0281] The present disclosure teaches one of the above methods including fuel parameters, wherein two fuels and / or different compositions of the fuel gas are used as two different fuel parameters.

[0282] The present disclosure teaches one of the above methods of two fuel parameters, wherein two different inlet pressures of the fuel and / or fuel gas are used as the two different fuel parameters.

[0283] The present disclosure teaches one of the above methods, wherein pure hydrogen or a mixture of hydrocarbon-containing fuel gas and hydrogen is used as fuel.

[0284] The present disclosure teaches one of the above methods, wherein the combustion device (1) additionally comprises at least two safety shut-off valves (7, 8) for interrupting the fuel supply (6) to the combustion chamber (2),

[0285] wherein at least two of the temperature sensors (19, 20) are used to monitor the flame in the combustion chamber (2);

[0286] A flameout is detected when a predetermined signal associated with the sensors (19, 20) falls below a predetermined value, and at least one of the safety shutoff valves (7, 8) is then closed, so that the fuel supply (6) is interrupted.

[0287] The present disclosure also teaches a method in which the combustion device (1) additionally comprises at least two safety shut-off valves (7, 8) for interrupting the fuel supply (6) to the combustion chamber (2),

[0288] wherein at least two of the temperature sensors (19, 20) are used to monitor the flame in the combustion chamber (2);

[0289] The difference between the signals of the temperature sensors (19, 20) is determined based on at least two temperature sensors (19, 20);

[0290] wherein a misfire is detected when the value of the difference between the temperature values ​​falls below a threshold value; and

[0291] At least one of the safety shut-off valves (7, 8) is then closed, so that the fuel supply (6) is interrupted.

[0292] The present disclosure presupposes that the two sensors (19, 20) are positioned such that the two temperature values ​​cannot assume the same temperature value during operation when a flame is present in the combustion chamber (2), but the combustion power from the characteristic curves (24, 25) can assume the same value.

[0293] The above-mentioned situations relate to various embodiments of the present disclosure. Various modifications to these embodiments may be made without departing from the basic concept and without departing from the scope of protection of the present disclosure. The subject matter of the present disclosure is defined by its claims. Various modifications may be made without departing from the scope of protection of the following claims.

[0294] Reference numerals

[0295] 1: Combustion equipment

[0296] 2: Combustion Chamber

[0297] 3: Burner

[0298] 4: Fan

[0299] 5: Air supply

[0300] 6: Fuel supply

[0301] 7: Safety stop valve

[0302] 8: Safety stop valve

[0303] 9: Fuel metering valve, especially fuel gas metering valve

[0304] 10: Exhaust channel

[0305] 11: Air supply signal

[0306] 12: Air supply sensor, such as fan speed sensor

[0307] 13: Regulating and / or controlling devices

[0308] 14: Circuit for fan control signal

[0309] 15: Line for air supply feedback, such as fan speed feedback

[0310] 16: Line for the control signal of the safety shut-off valve

[0311] 17: Circuit for the control signal of the safety shut-off valve

[0312] 18: Line for the control signal of the fuel metering valve

[0313] 19: First sensor in the combustion chamber

[0314] 20: First sensor in the combustion chamber

[0315] 21: Line for the measurement signal of the first sensor in the combustion chamber and the signal from this line

[0316] 22: Line for the measurement signal of the second sensor in the combustion chamber and the signal from this line

[0317] 23: Combustion power

[0318] 24: Characteristic curve of combustion power as a function of the measurement signal measured by the first sensor in the combustion chamber

[0319] 25: Characteristic curve of combustion power as a function of the measurement signal measured by the second sensor in the combustion chamber

[0320] 26: Characteristic curve of the combustion power in the case of a lean mixture as a function of the measurement signal measured by the first sensor in the combustion chamber

[0321] 27: Characteristic curve of the combustion power in the case of a lean mixture as a function of the measurement signal measured by the second sensor in the combustion chamber

[0322] 28: Characteristic curve of the air sensor signal before changing the exhaust path for modulation

[0323] 29: Characteristic curve for the modulated air sensor signal after changing the exhaust path

[0324] 30: Fuel supply control characteristic curve via fuel control for high-calorie fuels, in particular high-calorie fuel gas and / or high inlet pressure

[0325] 31: Fuel supply control characteristic curve via fuel control for low-calorie fuels, in particular low-calorie fuel gas and / or low inlet pressure

[0326] 32: Characteristic curve for modulation determined by the combustion system and adapted to the current fuel parameters and / or fuel gas parameters

Claims

1. A method for regulating a combustion device (1), the combustion device (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the following steps: recording a first signal from the first temperature sensor (19); recording a second signal from the second temperature sensor (20); determining at least one first combustion power as a function of the first signal using a first characteristic curve (24), which describes the course of the combustion power as a function of the signal of the first temperature sensor (19) for the first temperature sensor (19); determining at least one second combustion power as a function of the second signal using a second characteristic curve (25), which describes the course of the combustion power as a function of the signal of the second temperature sensor (20) for the second temperature sensor (20); determining a current combustion power of the combustion device (1) based on the at least one first combustion power and the at least one second combustion power; and The current combustion power of the combustion device (1) is adjusted to the target power of the combustion device (1).

2. The method according to claim 1, wherein the combustion device (1) additionally comprises at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), and adjusting the current combustion power of the combustion device (1) to the target power of the combustion device (1) comprises the following steps: Calculating the difference between the current combustion power of the combustion device (1) and the target power of the combustion device (1); generating an actuator signal based on the difference; and The actuator signal is sent to the at least one actuator.

3. The method according to claim 1 or 2, comprising the steps of: determining at least one third combustion power based on the first signal using the first characteristic curve (24), wherein the first characteristic curve (24) assigns at least two different combustion powers to the first signal, such that the at least one third combustion power differs from the at least one first combustion power; calculating a first difference between the at least one first combustion power and the at least one second combustion power; calculating a second difference between the at least one third combustion power and the at least one second combustion power; comparing the first difference to the second difference; if the first difference is less than the second difference, selecting the at least one first combustion power; If the second difference is less than the first difference, selecting the at least one third combustion power; and The current combustion power of the combustion device (1) is determined based on the selected combustion power and the at least one second combustion power.

4. The method according to claim 3, comprising the steps of: The current combustion power of the combustion device (1) is determined as an arithmetic mean of the selected combustion power and the at least one second combustion power.

5. The method according to claim 1 or 2, wherein the combustion device (1) additionally comprises a further sensor in the combustion chamber (2), wherein the further sensor in the combustion chamber (2) is different from the first temperature sensor (19) and different from the second temperature sensor (20), the method comprising the following steps: recording another combustion signal of the another sensor; determining at least one further combustion power as a function of the further combustion signal using a further characteristic curve which describes the course of the combustion power as a function of the signal of the further sensor for the further sensor; and The current combustion power of the combustion device (1) is determined based on the at least one first combustion power, the at least one second combustion power and the at least one further combustion power.

6. The method according to claim 1 or 2, wherein the combustion device (1) additionally comprises at least one supply channel fluidically connected to the combustion chamber (2), and a supply signal device (4, 7-9, 12) operatively connected to the fluid in the at least one supply channel, wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2), and the method comprises the following steps: recording the supply signal of the supply signal device (4, 7-9, 12); Determining the supply-based combustion power based on the supply signal using a supply-based characteristic curve, which describes the course of the combustion power as a function of the signal of the supply signal device (4, 7-9, 12) for the supply signal device (4, 7-9, 12); and The current combustion power of the combustion device (1) is determined based on the at least one first combustion power, the at least one second combustion power and the supply-based combustion power.

7. The method according to claim 1 or 2, wherein the combustion device (1) additionally comprises at least one actuator selected from the group consisting of an air actuator (4) and a fuel actuator (7-9), the method comprising the following steps: sending a change signal to the at least one actuator; After sending the change signal to the at least one actuator: recording a third signal of the first temperature sensor (19), recording a fourth signal of the second temperature sensor (20), determining at least one third combustion power based on the third signal while using the first characteristic curve (24); determining at least one fourth combustion power based on the fourth signal using the second characteristic curve (25); and The current combustion power of the combustion device (1) is determined based on the at least one first combustion power, the at least one second combustion power, the at least one third combustion power and the at least one fourth combustion power.

8. A combustion device (1), comprising: A combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); at least one supply channel connected to the fluid of the combustion chamber (2); at least one actuator selected from the group consisting of an air actuator (4) and a fuel actuator (7-9), wherein the at least one actuator acts on the at least one supply channel, the combustion device (1) additionally comprising a regulating and / or control device (13), which is in communication with the first temperature sensor (19), the second temperature sensor (20) and the at least one actuator, wherein the regulating and / or control device (13) is designed to perform the steps of the method according to any one of claims 1 to 7.

9. A computer program product comprising instructions causing the combustion device (1) of claim 8 to execute the method steps according to any one of claims 1 to 7.

10. A computer-readable medium having stored thereon the computer program product according to claim 9.

Images