EP3835667B1 - Procédé de commande d'une installation de chauffage et appareil de commande associé - Google Patents

Procédé de commande d'une installation de chauffage et appareil de commande associé Download PDF

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Publication number
EP3835667B1
EP3835667B1 EP20207398.7A EP20207398A EP3835667B1 EP 3835667 B1 EP3835667 B1 EP 3835667B1 EP 20207398 A EP20207398 A EP 20207398A EP 3835667 B1 EP3835667 B1 EP 3835667B1
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EP
European Patent Office
Prior art keywords
heating
temperature
heating circuit
hot water
heat generator
Prior art date
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EP20207398.7A
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German (de)
English (en)
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EP3835667A1 (fr
Inventor
Daniel Ghebru
Arne Kähler
Jochen Ohl
Alfons Schuck
Hans-Jürgen Schulz
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Techem Energy Services GmbH
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Techem Energy Services GmbH
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Publication of EP3835667A1 publication Critical patent/EP3835667A1/fr
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Classifications

    • 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
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/45—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0235—Three-way-valves

Definitions

  • the invention relates to a method for controlling a heating system, preferably with a condensing boiler as the heat generator, with at least one heating circuit for heating the building and with hot water preparation for heating service water to a hot water target temperature.
  • the heated service water can, for example, be stored in a hot water storage tank.
  • a heat generator flow temperature is selected to be greater than or equal to the heating circuit target temperature, and a mixer is provided for setting a heating circuit target temperature, i.e. for setting the actual heating circuit temperature in accordance with the heating circuit target temperature.
  • the invention also relates to a control device set up to carry out the method described below or parts thereof.
  • the heat source flow temperature in heating mode is selected so that it exceeds the heating circuit target temperature just far enough for a heat transfer medium circulating in the heating circuit to be heated to the heating circuit target temperature.
  • the heat generator typically reheats when a heating controller determines that the actual temperature of the heating circuit falls below the target temperature of the heating circuit by an adjustable amount and the actual temperature of the heating circuit should be increased, but the heat generator flow temperature is too low to generate the actual temperature of the heating circuit .
  • the heat generator flow temperature can be selected in such a way that the condensing boiler heats evenly over the long term and provides just such a heat output that the actual heating circuit temperature can be maintained in all heating circuits. If the heat generator flow temperature exceeds the heating circuit setpoint temperature by more than a parameterizable value, the heat generator switches off until it has to be reheated as described above in order to maintain the heating circuit setpoint temperature.
  • the mixer mixes the heat transfer medium from the heat generator (with the heat generator flow temperature) if necessary with the heat transfer medium from the heating return (which has a lower temperature) in order to set the heating circuit setpoint temperature as the actual heating circuit temperature. This is usually done by a controller that monitors the deviation of the actual heating circuit temperature from the heating circuit target temperature and uses a variable to act on the mixer in the heating circuit in such a way that the actual heating circuit temperature corresponds to the target heating circuit temperature.
  • the heat generator heats a heat transfer medium to a heat transfer medium flow temperature and delivers it to the building heating and hot water preparation via a flow.
  • the heat transfer medium from the building heating (i.e. from the heating circuits) and from the hot water preparation flows via a return flow back to the heat generator, which heats up the heat transfer medium again, after the heat energy has been released in the systems (building heating, hot water supply).
  • the efficiency of a condensing boiler preferred according to the invention is essentially determined by the heat generator return flow temperature of the heat transfer medium that is fed to the heat generator for heating.
  • the return is made up of the building heating return (all heating circuits) and the hot water generation return (of the hot water storage tank loading circuit).
  • the return temperature of the heat transfer medium returned to the heat generator should be as low as possible, preferably in the range between 20°C and 40°C and in any case not exceed the condensing limit temperature of about 57°C. Above this temperature, the efficiency gain of the condensing technology is only small. It is therefore advantageous to select the heating circuit flow temperature (heating circuit setpoint temperature) in such a way that the thermal output released in the heating circuit cools the heat transfer medium down to near room temperature. The condensing boiler then generates just the heat output required in heating mode and runs continuously with a high degree of efficiency.
  • the return temperature from the hot water preparation depends on the flow temperature and the flow rate in the charging circuit as well as the charging status and the design of any hot water storage tank.
  • the return temperature from the hot water preparation is typically well above the return temperature of the heating circuit. The efficiency of the condensing boiler is therefore significantly lower during hot water preparation than in heating mode.
  • a condensing boiler in the sense of this text is understood not only as a condensing boiler in the sense described above, the efficiency of which depends significantly on the return temperature of the heat carrier heated in the heat generator.
  • a condensing boiler within the meaning of this text is generally understood to mean a heat generator that can be operated more efficiently in the heating mode of a building than in the hot water preparation, which often requires higher heat generator temperatures than the heating mode.
  • Condensing boilers within the meaning of this text can be heat generators that generate heat locally by converting final energy (e.g. oil, gas, pellets) in a boiler, combined heat and power plant, heat pump or similar, or obtain heat from a district or local heating network.
  • Heating systems with heating mode and hot water preparation are often operated with a hot water priority circuit.
  • a hot water priority circuit is supported by every common heating regulation or heating control.
  • the heat supply to the heating circuit is stopped while the service water is being heated during hot water preparation.
  • the temperature of the heat generator (boiler temperature or heat generator flow temperature) is increased and the drinking or process water in the hot water storage tank is heated.
  • an after-running phase of usually a few minutes is activated, in which the heat generator can transfer most of its residual heat to the hot water storage tank when it is switched off.
  • the charging branch for hot water preparation is then switched off and the heating circuit switched on again for heating operation.
  • a disadvantage of the hot water priority circuit is that the building heating or its heating circuit or heating circuits is not supplied with heat during the hot water preparation period. Depending on the size of the hot water storage tank and/or the hot water requirement in the building, this period of non-supply of the building heating with heat can be 20 to over 40 minutes.
  • the heating pump is switched off during hot water preparation, which can be perceived by the occupants of the building as a failure of the heating system, especially if a cooled radiator is to be put into operation during this time.
  • Other heating controllers close the mixer in the heating circuit, but allow a heating circuit pump to continue running. The heating circuit is then operated without heat supply. This also leads to severe cooling, but due to the perceptible flow of the heat transfer medium in the radiator, it is not directly perceived as a failure of the heating system.
  • This disadvantage of room heating comfort can be remedied by deactivating the hot water priority circuit.
  • the heating circuit is operated continuously, even during hot water preparation.
  • this mode of operation has the disadvantage that the entire space heating energy, with which the heating circuit is supplied during hot water preparation, is generated at a less energy-efficient operating point of the heat generator.
  • the heat generator is not operated in an energy-efficient manner during hot water preparation and during the transition from hot water preparation to heating operation.
  • the DE 44 38 881 A1 discloses a heating system with a condensing boiler, heating circuits, a service water boiler and a service water circuit and a control device for this, which sets priority operation of the service water circuit or parallel operation of heating and service water circuits depending on the outside, room, boiler water and/or service water temperature.
  • the U.S. 2018/120824 A1 relates to a similar heating system with a control unit that prompts a consumer to end hot water consumption if the heating mode has to be switched back on first.
  • DE 43 13 277 C1 DE 197 01 823 A1
  • EP 0 608 500 A1 and EP 3 492 828 A1 similar heating systems and methods for their operation for heating and/or hot water supply are described.
  • the object of the invention is to increase the energy efficiency of a heating system with in particular a condensing boiler as a heat generator, building heating and hot water preparation in a simple manner.
  • a method of the type mentioned at the outset provides in particular that during hot water preparation, in particular at the start of hot water preparation, a regular heating circuit target temperature in heating mode (also referred to as the target flow temperature of the heating circuit) is reduced by a configurable value and increased again after hot water preparation the regular heating circuit setpoint temperature of heating operation is reset.
  • the regular heating circuit setpoint temperature (after reducing the heating circuit setpoint temperature during hot water preparation) is set again after hot water preparation.
  • the regular heating circuit setpoint temperature can, for example, be taken from a heating curve or from another control and/or regulation system.
  • the inventive method is also referred to as "soft priority circuit".
  • Radiator heaters are particularly preferably provided in the heating circuit, in which case the method is particularly effective and offers the user a significant increase in comfort while at the same time optimizing the efficiency of the heat generation.
  • the heating circuit setpoint temperature can be reduced before the heat generator flow temperature is increased during hot water preparation.
  • the heating circuit setpoint temperature can preferably be reduced immediately before the heat generator flow temperature is increased.
  • “directly” means that after the heating circuit target temperature has been reduced, the controller only waits for a period of time during which it closes the mixer fully or partially. After this positioning time, the heat generator flow temperature can be increased immediately. This is typically done as part of the hot water preparation, in which the hot water should be generated as quickly as possible and therefore the heat generator flow temperature is selected as high as possible; Heat source flow temperatures between 70°C and 90°C are often reached, e.g. around 80°C.
  • the mixer After the positioning time, the mixer is usually closed first, since the actual heating circuit temperature is significantly higher than the (now reduced) heating circuit target temperature and there is therefore no heat requirement in the heating circuit. If the mixer is closed before the heat source flow temperature is increased, an additional surge of heat into the heating circuit is avoided.
  • the heating circuit first cools down by the specified value before heat energy is supplied again (by opening the mixer to a suitable extent).
  • the heating circuit setpoint temperature can be reduced as a "night setback control command" and thus analogous to a night setback, with which the heating circuit setpoint temperature is lowered during the usual sleeping times of the occupants or non-use times in office buildings.
  • a temperature value for reducing the heating circuit setpoint temperature can also be specified as a parameter within the scope of the method proposed according to the invention, e.g. in the order of around -10 K to -15 K or a relative reduction in the heating circuit overtemperature from to about 25% the current heating circuit excess temperature.
  • the excess temperature is the difference between the heating circuit flow temperature and the average building temperature.
  • the duration of the reduction in the heating circuit setpoint temperature during hot water preparation is limited and the regular heating circuit setpoint temperature is set again at the latest after the duration has expired, even if the hot water preparation is not yet complete.
  • This maximum duration can preferably be configured, ie it can be specified by the user. If this possibly parameterizable maximum duration, for example in the order of 45 minutes to 1 hour, is exceeded, the heating circuit target temperature (target flow temperature) is increased again to its regular value, which corresponds in particular to the heating curve, by this variant of the proposed method according to the invention. This prevents the building from being undersupplied or cooling down beyond the usual duration of hot water preparation if the hot water preparation should take an unusually long time.
  • the duration of the reduction in the heating circuit setpoint temperature can be learned or determined from the usual duration of hot water preparation in the building by recording the duration of hot water preparation over a certain period of time, i.e. several cycles of hot water preparation, and determining an average duration , whereby the duration of the reduction of the heating circuit setpoint temperature is selected as a multiple of the determined average duration (of hot water preparation).
  • the multiple can be determined by a factor that is an integer or rational number greater than 1, i.e., for example, 1.5 times the determined average duration.
  • the controller is the start and end time of the hot water preparation known, so that the duration of hot water preparation can be determined by a simple time difference.
  • the average duration in several hot water preparation cycles is particularly preferably determined over a specific period of time, which is preferably at least one day or several days up to one week. Determining the average duration in a week captures the typical habits of hot water consumption by users in different situations. This forms a statistically meaningful basis for determining the average duration of hot water preparation. This can be determined automatically by the system or the controller. For example, 1.5 times to 2 times the average duration can be selected as a multiple of the average duration in order to limit the duration of the reduction in the heating circuit setpoint temperature. In addition, an absolute maximum duration, for example 1 hour, can also be specified. This also prevents the building from cooling down too much during the cold season.
  • the gain in efficiency in heating operation compared to hot water preparation with classic condensing boilers is only achieved if the temperature of the heat carrier returned to the heat generator in the return does not exceed the condensing value limit temperature already explained, it can be provided in a sensible optional embodiment of the proposed method that the The heating circuit return temperature is measured and the reduction in the heating circuit set temperature is returned (ie ended or reduced) if the heating circuit return temperature is above the condensing limit temperature.
  • the increase in efficiency depends on the return temperature of the heat transfer medium in the heating circuit. If this temperature is above a calorific value limit temperature, which can be around 57° C., for example, the efficiency gain of the proposed method is only slight.
  • the reduction in the heating circuit setpoint temperature proposed according to the invention can then be returned or reduced down to the value 0, at which the heating circuit setpoint temperature corresponds to the regular heating circuit setpoint temperature, as it is specified for example by a heating characteristic. In this case, the heat would not be generated more efficiently in heating mode than in hot water preparation.
  • this also includes a control unit for controlling a heating system, preferably with a condensing boiler as the heat generator, with at least one heating circuit for heating the building and with hot water preparation for heating service water to a hot water target temperature, with the service water being stored in a hot water tank, for example of hot water preparation can be saved.
  • the proposed control device has interfaces for controlling the heat generator, the at least one heating circuit and the hot water preparation, as well as a computing device that is set up to carry out the method described above or parts thereof.
  • the computing device can be located both in the control unit on site (local) and, for example, in an IT cloud or a data center (remote). If the computing device is in the IT cloud or in a data center (e.g. in a central IT system), parameters for controlling the heat generator can be downloaded to the control unit, for example via a mobile data transmission interface.
  • the control unit can be integrated into the control unit that is usually present in the heating system and can have internal interfaces for controlling the heat generator, the at least one heating circuit and the hot water preparation.
  • the control unit can also be provided as a device separate from the heating system and can be connected to the control unit of the heating system via a control interface, for example a suitable bus or other interface via which the aforementioned interfaces can be implemented.
  • control unit can carry out a flow temperature simulation and thus indirectly bring the existing control unit of the heating system to adjust the flow temperature.
  • temperature sensors for detecting the heat generator flow temperature, the heat generator return temperature, the heating circuit flow temperature, the heating circuit return temperature and/or the actual hot water temperature can be connected or can be connected to the interfaces of the control unit. This enables the control device to carry out the method proposed according to the invention in a simple and precise manner.
  • a further refinement of the invention can take place in that the control device controls a mixer of the heating system directly.
  • the control signal from the original heating controller can be recorded by the control unit, interpreted and forwarded to the mixer either unchanged or manipulated.
  • An optimized control of the mixer can be based on measured temperature values or can be achieved with knowledge of the mixer runtime and mixer position.
  • control unit 1 is shown according to an embodiment of the invention.
  • the control device 1 is connected via interfaces 2, 3, 4, 5 to components of a heating system 100 of a building.
  • a computing device (not shown) which is set up to carry out the method proposed according to the invention for controlling the heating system 100 .
  • the computing device can be arranged in an IT cloud or in a computing center, in which case there is a communication unit (not shown) in control unit 1 instead of the computing device.
  • the heating system 100 has a heat generator 101, preferably designed as a condensing boiler, a heating circuit 111 for heating the building and a water heater 121 for heating service water to a desired hot water temperature.
  • the service water can be tapped by the users of the building.
  • the water heater 121 also includes an in figure 1 water reservoir, not shown, in which the heated domestic water is stored.
  • Interface 2 connects control unit 1 to heat generator 101.
  • Interface 3 connects control unit 1 to hot water preparation 121.
  • Interface 4 connects control unit 1 to heating circuit 111.
  • Optional interface 5 connects control unit 1 to mixer 112 of heating circuit 111 Via the interface 5, the control device 1 can set the mixer 112 via the activation of the electrically operated mixer motor or servomotor and thus the heating circuit flow temperature ⁇ HZ VL affect directly.
  • Control signals are output via interfaces 2, 3, 4, 5. This is in the figure 1 shown as a dashed line.
  • the heating circuit 111 is connected to the heat generator flow 102 via a mixer 112 .
  • the heat generator 101 outputs the heated heat transfer medium at a heat transfer medium flow temperature via the heat generator flow 102 ⁇ WE VL out of.
  • the temperatures are in figure 1 represented by a labeled dot at the respective positions where they are measurable by a temperature sensor. These points can also represent temperature sensors, which can be queried by the controller 1, for example, via the interfaces 2, 3, 4 (and a signal transmission that is not shown).
  • the heated heat transfer medium with the heat transfer medium flow temperature ⁇ WE VL is fed to a first input of the mixer 112 .
  • a second input of the mixer 112 is connected to the heating circuit return 114 in order to cool the heat transfer medium from the heat generator flow 102 by adding the (cooled down) heat transfer medium from the heating circuit return 114 and in the heating circuit flow 113 one of the heating circuit set temperature ⁇ HZ should corresponding heating circuit flow temperature ⁇ HZ VL set.
  • the heating circuit target temperature ⁇ HZ should not marked.
  • the heating circuit 111 is in the heat transfer medium with the flow temperature ⁇ HZ VL Stored thermal energy is partially released via heat exchangers, preferably radiator heat exchangers (classic radiators).
  • the heat transfer medium cools down to the return temperature ⁇ HZ RL away.
  • the heat transfer medium is fed back to the heat generator 101 for reheating via the heat generator return 103 .
  • the heat transfer medium is used at the heat transfer medium flow temperature ⁇ WE VL supplied to the hot water treatment 121, in which the heat carrier transfers the thermal energy via a heat exchanger to the hot water, which is usually stored in an insulated heat accumulator, not shown, and is available for tapping by the user. After the thermal energy has been released by the heat transfer medium to the process water, the heat transfer medium is fed back into the return 103 of the heat generator 101 via the hot water preparation return 122 . In the flow, the hot water preparation 121 is connected directly to the heat generator flow 102 .
  • hot water preparation 121 is carried out in a so-called priority mode, in which mixer 112 of heating circuit 111 is closed, so that no heat is supplied to heating circuit 111 during hot water preparation 121.
  • heating circuit 111 for the sake of clarity, only one heating circuit 111 is shown. However, more than one heating circuit 111 can also be provided in buildings; the plurality of heating circuits 111 are then connected to the heat generator flow 102 in a comparable manner, preferably via their own mixer 112 .
  • the temperature profile in parallel operation of hot water preparation 121 and heating operation in the heating circuit 111 is in figure 3 shown.
  • the heating system 100 is still in pure heating mode (left side of the time axis before time t1).
  • the heat generator flow temperature ⁇ WE VL and the heating circuit flow temperature ⁇ HZ VL fall in unison from a temperature value ⁇ - in the example - greater than 50 °C to a temperature value of about - in the example - 45 °C, which is close to the heating circuit return temperature ⁇ HZ RL lies.
  • the heating circuit target temperature ⁇ HZ VL is - in the example - at 50 °C.
  • hot water preparation is also activated parallel to heating operation.
  • the heat generator flow temperature is used for this ⁇ WE VL to - in the example - increased to about 85 ° C and fed to the heat transfer medium of hot water preparation 121. There it partially transfers its thermal energy to the process water and leaves the hot water preparation 121 with the heating water return temperature ⁇ ww RL , which is only slightly lower than the heat generator flow temperature ⁇ WE VL and is significantly higher than the heating circuit return temperature ⁇ HZ RL .
  • the temperatures mentioned correspond to possible temperature values that can occur in typical systems.
  • the invention is not intended to be limited to these temperature values, which those skilled in the art will adjust as needed.
  • the heat generator flow temperature ⁇ WE VL is kept at the temperature level of a good 80 °C until time t2, at which the actual service water temperature ⁇ ww is the required domestic water target temperature ⁇ ww should is equivalent to. This temperature value is also only to be understood as an example. However, it is desirable that the heat generator flow temperature ⁇ WE VL is significantly increased in the hot water preparation 121 compared to the heating mode, so that the hot water is heated quickly. An increase in the heat generator flow temperature ⁇ WE VL compared to the target hot water temperature by, for example, 15 K to 25 K can definitely be aimed for.
  • the heat generator 101 is also switched off, so that the heat generator flow temperature ⁇ WE VL drops and the heating circuit flow temperature ⁇ HZ VL approaching. In other words, the heat carrier in the flow 102 of the heat generator 101 cools down slowly. It then begins again at time t3 Pure (regular) heating operation, i.e. heating operation without additional heat input from hot water preparation 121.
  • FIG 4 is the heat output ⁇ for the in figure 3 shown temperature curve reproduced, the heat output is shown separately for hot water preparation and the heating circuit. It can be seen that the heat energy given off during hot water preparation 121 (integrated heat output ⁇ between times t1 and t2; the integrated heat output is also referred to as heat quantity) is about twice as high as the heat energy 116 given off in the heating circuit 111.
  • the invention proposes a method for controlling a heating system, the main features of which are shown in a schematic flowchart accordingly figure 2 are shown. It is pointed out that only the basic ideas of the invention are listed here for the sake of clarity. The optional elements already described can be incorporated into this process flow by those skilled in the art.
  • the start 51 of the illustrated method 50 for controlling a heating system is in method step 52 in the detection of a need for hot water preparation and the lowering of the heating circuit setpoint temperature ⁇ HZ should by a predetermined value.
  • the mixer 112 closes and decouples the heating circuit 111 from the heat generator 101 or reduces the flow of the heat transfer medium in the heating circuit 111. This takes place automatically in method step 53.
  • the heating circuit setpoint temperature ⁇ HZ should raised again to the regular value, ie the value before hot water preparation. The method thus ends in method step 57.
  • the temperature curve resulting from this process accordingly figure 3 is in figure 5 shown.
  • the reduction in the heating circuit set temperature can be seen ⁇ HZ should between times t1 and t2 during hot water preparation. Due to the closing of the mixer 112 following the lowering of the heating circuit target temperature ⁇ HZ should the heating circuit flow temperature increases ⁇ HZ VL despite the increase in the heat generator flow temperature ⁇ WE VL barely.
  • the mixer 112 mixes a small portion of the heat output generated by the heat generator 101 into the heating circuit 111 merely to prevent the building from cooling down too much.
  • the heating circuit setpoint ⁇ HZ should back to the previous level, ie the regular heating circuit set point specified, for example, by a heating curve ⁇ HZ should raised.
  • the heating circuit setpoint ⁇ HZ should Lowered by 10 °C, from 50 °C to 40 °C.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Water Supply & Treatment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Claims (10)

  1. Procédé de commande d'une installation de chauffage (100) avec un générateur de chaleur (101), avec au moins un circuit de chauffage (111) pour le chauffage de bâtiments et avec une production d'eau chaude (121) pour chauffer de l'eau sanitaire, sachant qu'une température d'arrivée du générateur de chaleur (&VL/WE) est choisie plus élevée ou identique à la température théorique de circuit de chauffage (ϑsoll/HZ) et un mitigeur (112) est prévu pour régler une température d'arrivée de circuit de chauffage (SVL/HZ), caractérisé en ce que pendant la production d'eau chaude, une température théorique de circuit de chauffage régulière(ϑsoll/HZ) est réduite en mode de chauffage d'une valeur configurable et est à nouveau replacée après la production d'au chaude (121) sur la température théorique de circuit de chauffage régulière (ϑsoll/HZ) du mode de chauffage.
  2. Procédé selon la revendication 1, caractérisé en ce que la réduction de la température théorique de circuit de chauffage (ϑsoll/HZ) a lieu avant que la température d'arrivée du générateur de chaleur (&VL/WE) soit augmentée lors de la production d'eau chaude (121).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la durée de la réduction de la température théorique de circuit de chauffage (ϑsoll/HZ) est limitée pendant la production d'eau chaude (121) et est à nouveau ajustée après expiration de la durée de la température théorique de circuit de chauffage régulière (ϑsoll/HZ).
  4. Procédé selon la revendication 3, caractérisé en ce que la durée de la réduction de la température théorique de circuit de chauffage (ϑsoll/HZ) est acquise à partir de la durée habituelle d'une production d'eau chaude (121) dans le bâtiment, la durée de la production d'eau chaude (121) étant saisie sur une période définie et une durée moyenne étant déterminée, sachant que la durée de la réduction de la température théorique de circuit de chauffage (ϑsoll/HZ) est choisie en tant que multiple de la durée moyenne déterminée.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température de retour de circuit de chauffage (dRL/HZ) est mesurée et la réduction est ramenée à la température théorique de circuit de chauffage (ϑsoll/HZ), si la température de retour du circuit de chauffage (dRL/HZ) se situe au-dessus d'une température limite de valeur calorifique.
  6. Appareil de commande pour la commande d'une installation de chauffage (100) avec un générateur de chaleur (101), avec au moins un circuit de chauffage (111) pour le chauffage de bâtiments et avec une production d'eau chaude (121) pour le chauffage de l'eau sanitaire, sachant que l'appareil de commande (1) comporte des interfaces (2, 3, 4) pour commander le générateur de chaleur (101), d'au moins un circuit de chauffage (111) et de la production d'eau chaude (121) et avec un système de calcul, caractérisé en ce que le système de calcul est agencé pour exécuter le procédé selon l'une quelconques des revendications 1 à 4.
  7. Appareil de commande selon la revendication 6, caractérisé en ce que des capteurs de température peuvent être raccordés aux interfaces (2, 3, 4) pour la saisie de la température d'arrivée du générateur de chaleur (ϑVL/WE), de la température de retour du générateur de chaleur (dRL/WE), de la température d'arrivée du circuit de chauffage (SVL/HZ), de la température de retour du circuit de chauffage (dRL/HZ) et/ou de la température réelle de l'eau chaude (ϑist/WW).
  8. Appareil de commande selon la revendication 7, caractérisé en ce qu'un capteur de température est raccordé à une des interfaces (2, 3, 4) pour la saisie de la température de retour du circuit de chauffage (ϑRL/HZ) et le système de calcul est agencé pour exécuter le procédé selon la revendication 5.
  9. Appareil de commande selon l'une quelconque des revendications 6 à 8, caractérisé en ce que le système de calcul se trouve dans un système de nuage informatique (Cloud).
  10. Appareil de commande selon l'une quelconque des revendications 6 à 8, caractérisé en ce que le système de calcul se trouve dans un système informatique central.
EP20207398.7A 2019-12-13 2020-11-13 Procédé de commande d'une installation de chauffage et appareil de commande associé Active EP3835667B1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701823B4 (de) * 1996-01-15 2006-06-22 Vaillant Gmbh Wasserheizungsanlage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3503738A1 (de) * 1984-02-14 1985-08-14 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Schaltung zum steuern der waermeabgabe einer brennstoffbeheizten waermequelle
DK0608500T3 (da) * 1993-01-28 1997-12-01 Landis & Gyr Business Support Varmeanlæg med varmtvandsbeholder og prioriteret kobling til varmtvandsbeholderen
DE4313277C1 (de) * 1993-04-23 1994-08-11 Buderus Heiztechnik Gmbh Verfahren zum Betreiben einer Heizungsanlage
DE4438881A1 (de) * 1994-10-31 1996-05-02 Buderus Heiztechnik Gmbh Verfahren zum bedarfsangepaßten Betreiben einer Heizungsanlage
DE102009019619A1 (de) * 2009-04-30 2010-11-04 Robert Bosch Gmbh Verfahren zum Regeln eines Heizungssystems
JP6830339B2 (ja) * 2016-11-01 2021-02-17 リンナイ株式会社 熱源装置
EP3492828B1 (fr) * 2017-11-29 2021-02-24 Robert Bosch GmbH Procédé et dispositif de réglage d'un programme de temporisation d'un système de chauffage et / ou d'un programme de temporisation d'un système d'automatisation domestique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701823B4 (de) * 1996-01-15 2006-06-22 Vaillant Gmbh Wasserheizungsanlage

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PL3835667T3 (pl) 2023-12-27
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