EP3919823A1 - Procédé de commande de production et de distribution de chaleur dans une installation de chauffage - Google Patents

Procédé de commande de production et de distribution de chaleur dans une installation de chauffage Download PDF

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Publication number
EP3919823A1
EP3919823A1 EP21175883.4A EP21175883A EP3919823A1 EP 3919823 A1 EP3919823 A1 EP 3919823A1 EP 21175883 A EP21175883 A EP 21175883A EP 3919823 A1 EP3919823 A1 EP 3919823A1
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EP
European Patent Office
Prior art keywords
temperature
heat
value
heat pump
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21175883.4A
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German (de)
English (en)
Inventor
Horst GRÜNING
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3919823A1 publication Critical patent/EP3919823A1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1018—Radiator valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump

Definitions

  • radiators There are a variety of different forms of radiator. What they all have in common is that the heat capacity is far lower than that of conventional floor heating, and individual room control has so far mostly been achieved by means of thermostatic valves on each radiator.
  • Thermostatic valves even those advanced ones that are connected to an electronic control, throttle the flow of the heat transport medium, water, depending on the room temperature.
  • the consequence of the reduced flow in the radiator is in many cases uneven heating of the same. In such cases, only part of the radiator surface effectively contributes to the radiation, with the result that the temperature in the heated part of the radiator must be higher than with an even temperature distribution.
  • the low heat capacity in the heating circuit leads to a rapid increase in the heating circuit temperature after the heat generator has started.
  • Gas heating systems seem to have few problems with this - they can start up at short intervals and reheat briefly in order to maintain the temperature in the heating circuit.
  • Neither the first nor the second method can be used for operation with a heat pump.
  • an air-to-water heat pump that extracts the heat from the outside air needs up to 15 minutes after each start until it reaches the steady-state efficiency values measured on the test bench.
  • heat pumps require more electrical energy when they have to bridge a higher temperature difference between the source (outside air) and the sink (flow temperature in the heat pump's heat exchanger).
  • the heat pump feeds a buffer storage tank, the water temperature of which is guided via a heating curve depending on the outside air temperature.
  • the radiators receive a throttled inflow from the buffer tank via thermostatic valves.
  • the adjustment of such a system has a decisive influence on the overall efficiency, because the further the temperature values in the buffer storage are above what the radiators really need at the respective outside temperature, the more electrical energy the heat pump will consume.
  • the aim is therefore to set the buffer temperature values as low as possible by trimming the heating curve during commissioning of the system. It must be checked in the following winter periods and readjusted if necessary.
  • Radiator controls according to the present invention make it possible to operate the heat pump in long operating cycles and to keep the flow temperature of the heat pump as low as possible.
  • the amount of heat provided is also distributed to the various rooms in the best possible way.
  • the control process process for controlling the generation and distribution of heat
  • Fig. 1a shows a preferred embodiment of the control method.
  • Figure 1b shows an example of an embodiment of a heating system with the controller 40.
  • the heat pump 1 feeds a predominantly water-based heat transport system 2 with flow 2V, pump 2P and return 2R.
  • the temperature sensor 3 measures the temperature in the flow 2V of the heat transport system 2 and the flow temperature subtractor 4 determines the deviation of the flow temperature from the flow target temperature value, which is specified by the flow target temperature value generator 6.
  • the power output of the heat pump is adjusted via a suitable heat pump control 5 - the heat pump control circuit is thus closed.
  • the Figs. 1a and 1b is based on a heating area with three rooms as an example.
  • Each room has a room temperature sensor 11, 21, 31 and a room temperature setpoint generator 12, 22, 32.
  • the room temperature subtractors 13, 23, 33 feed the difference between the actual room temperature and the room temperature setpoint to the PID controllers 14, 24, 34.
  • the PID controller 14, 24, 34 control the PWM modulators 15, 25, 35, which clock the radiator valves 16, 26, 36 and thereby determine the temperature of the radiators 17, 27, 37.
  • the temperature of the radiators 17, 27, 37 influences the room temperatures of the three rooms in a known manner.
  • a closed control loop e.g. 17, 11, 12, 13, 14, 15, 16 is formed for each room, whereby the output signal of the PID controllers 14, 24, which determines the pulse duty factor of the PWM modulators 15, 25, 35, 34 forms a direct measure of the degree of modulation of the radiator valves 16, 26, 36.
  • the signal selection block 7 forwards one of the output signals of the PID controllers 14, 24, 34 or a combination thereof to the modulation subtractor 9.
  • the modulation subtracter 9 then forms the difference between this signal and the value of the modulation setpoint generator 8 and uses it to control the output value of the flow setpoint temperature value generator 6 .
  • a control loop which regulates the flow temperature of the heat pump 1 in such a way that the output signal from the signal selection block 7 reaches the value of the modulation setpoint generator 8.
  • This control loop causes the flow temperature of the heat pump 1 to drop when the value of the modulation setpoint generator 8 is increased.
  • the aim is to set the flow temperature of the heat pump 1 as low as possible, because this increases its efficiency. This is achieved by the highest possible value of the modulation setpoint generator 8.
  • the value is preferably selected such that the value selected by the signal selection block 7 corresponds to a PWM pulse duty factor of almost 100%, but in any case> 75%.
  • the duty cycle of the radiator valves 16, 26, 36 is determined from the pulse duty factor of the PWM modulators 15, 25, 35. This is reliably achieved when the radiator valves 16, 26, 36 switch between fully open and fully closed. However, it will be advantageous for the load on the heat pump if at no point in time all radiator valves 16, 26, 36 are completely closed, because then the heat pump can no longer give off any heat.
  • a permanent low flow through the radiator valves 16, 26, 36 which can also be generated by a suitable bypass, for example, can solve the problem without the duty cycle of the PWM modulators 15, 25, 35 losing its informative value.
  • the timing of the radiator valves is generated, for example, by the PWM modulators 15, 25, 35.
  • the type of clocking can be freely selected insofar as a pulse duty factor can be determined from it. It is even possible to use single pulse clocking, as described in the patent CH706660B1 has been described.
  • the method for controlling the generation and distribution of heat in a heating system supplies the radiators in such a way that the desired room temperature is set in each room.
  • the radiators are repeatedly flowed through with full flow, so that a uniform temperature distribution is achieved and a high level of radiation results even at a low radiator temperature.
  • the process for controlling the generation and distribution of heat operates the heat pump according to the heat demand and sets the lowest possible flow temperature so that the heat pump can achieve a high level of efficiency.
  • Fig. 2 shows a second preferred embodiment of the control method.
  • the signal selection block 7M is designed therein in such a way that it switches the highest value of the output signals of the PID controllers 14, 24, 34 through to the output.
  • this largest pulse duty factor value from the heating system is compared with the value of the modulation setpoint generator 8.
  • the flow temperature 2V of the heat pump 1 is set in such a way that the room with the highest flow temperature requirement receives sufficient heat.
  • An arrangement according to a second preferred embodiment takes into account the flow temperature requirement of all rooms and sets the flow temperature of the heat pump so that it is sufficient for the room with the greatest flow temperature requirement.
  • Fig. 3 shows a third preferred embodiment of the control method.
  • the signal selection block 7R is designed therein in such a way that it switches the value of the output signal of the PID controller 34 of the reference space through to the output.
  • the duty cycle value of the reference room from the heating system is compared with the value of the modulation setpoint generator 8.
  • the flow temperature 2V of the heat pump 1 is set so that the reference room receives sufficient heat.
  • An arrangement according to a third preferred embodiment takes into account the flow temperature requirement of a reference room and sets the flow temperature of the heat pump so that it is sufficient for this room.
  • Fig. 4 shows a fourth preferred embodiment of the control method.
  • An outside temperature sensor 10 is placed in such a way that it can determine the temperature of the air in the vicinity of the building comprising the named rooms. Its temperature value is fed to the flow setpoint temperature value generator 6, which uses this to calculate a default value for the flow temperature subtracter 4. The output value of the modulation subtracter 9 is included in this calculation by the flow temperature value generator 6 as a correction factor.
  • An arrangement according to a fourth preferred embodiment bases the calculation of the flow temperature decisively on the temperature of the air in the vicinity of the building comprising the named rooms. Changes in the ambient temperature therefore lead directly to an adjustment of the flow temperature without a change in the room temperatures having to be recognized beforehand. An arrangement according to a fourth preferred embodiment will therefore regulate the room temperatures better.
  • Figure 5a shows a fifth preferred embodiment of the control method
  • Figure 5b an example of a family of three heating curves 60, 61, 62.
  • a heating curve 60 is initially stored in the flow setpoint temperature value generator 6H. As a result, he will calculate a default value for the flow temperature subtracter 4, which is already quite close to the target value for the setting of the heat pump.
  • the output value of the modulation subtracter 9 is introduced to correct the steepness of the heating curve, so that the heating curve is optimized.
  • the steeper heating curve 61 leads to an increase in the flow temperature, whereas the less steep heating curve 62 leads to a reduction in the flow temperature.
  • An arrangement according to a fifth preferred embodiment bases the calculation of the flow temperature on a heating curve.
  • the heating curve is continuously trimmed, so that any manual trimming can be omitted because the flow temperature is always adjusted as best as possible.
  • Figure 6a shows a sixth preferred embodiment of the control method
  • Figure 6b shows an example of an embodiment of a heating system.
  • the buffer store 2S stores heat in a known manner. As a result, the heat pump can be clocked without interrupting the flow of heat to the radiators.
  • An arrangement according to a sixth preferred embodiment can maintain a constant flow of heat even when a lower heat output is required than the heat pump is able to deliver in continuous operation.
EP21175883.4A 2020-06-04 2021-05-26 Procédé de commande de production et de distribution de chaleur dans une installation de chauffage Withdrawn EP3919823A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00664/20A CH717496B1 (de) 2020-06-04 2020-06-04 Verfahren zur Steuerung der Wärmeerzeugung und -verteilung in einer Heizungsanlage.

Publications (1)

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EP3919823A1 true EP3919823A1 (fr) 2021-12-08

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EP21175883.4A Withdrawn EP3919823A1 (fr) 2020-06-04 2021-05-26 Procédé de commande de production et de distribution de chaleur dans une installation de chauffage

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EP (1) EP3919823A1 (fr)
CH (1) CH717496B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021132563A1 (de) 2021-12-08 2023-06-15 Eq-3 Entwicklung Gmbh Heizungsregelung
DE102022003809A1 (de) 2022-10-12 2024-04-18 Alexej Isakov Verfahren zur Reduzierung der Raumheizungskosten und Raumheizungssystem dafür

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2369245A1 (fr) * 2010-03-16 2011-09-28 Rehau AG & Co Procédé de réglage d'une valeur de consigne de température d'entrée d'une courbe de chauffe d'un système de chauffage
DE102010053211A1 (de) * 2010-12-03 2012-06-06 Danfoss A/S Verfahren zum Betreiben eines Heizungssystems
EP2530390A1 (fr) * 2011-06-01 2012-12-05 Danfoss A/S Système de chauffage et procédé de chauffage de plusieurs pièces
CH706660B1 (de) 2012-06-14 2016-09-15 Grüning Horst Heizsystem mit Wärmepumpe.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2369245A1 (fr) * 2010-03-16 2011-09-28 Rehau AG & Co Procédé de réglage d'une valeur de consigne de température d'entrée d'une courbe de chauffe d'un système de chauffage
DE102010053211A1 (de) * 2010-12-03 2012-06-06 Danfoss A/S Verfahren zum Betreiben eines Heizungssystems
EP2530390A1 (fr) * 2011-06-01 2012-12-05 Danfoss A/S Système de chauffage et procédé de chauffage de plusieurs pièces
CH706660B1 (de) 2012-06-14 2016-09-15 Grüning Horst Heizsystem mit Wärmepumpe.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021132563A1 (de) 2021-12-08 2023-06-15 Eq-3 Entwicklung Gmbh Heizungsregelung
DE102022003809A1 (de) 2022-10-12 2024-04-18 Alexej Isakov Verfahren zur Reduzierung der Raumheizungskosten und Raumheizungssystem dafür

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Publication number Publication date
CH717496B1 (de) 2023-03-31
CH717496A2 (de) 2021-12-15

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