EP4500089A1 - Verfahren zum steuern eines heizungssystems, heizungssystem und steuervorrichtung - Google Patents
Verfahren zum steuern eines heizungssystems, heizungssystem und steuervorrichtungInfo
- Publication number
- EP4500089A1 EP4500089A1 EP23715795.3A EP23715795A EP4500089A1 EP 4500089 A1 EP4500089 A1 EP 4500089A1 EP 23715795 A EP23715795 A EP 23715795A EP 4500089 A1 EP4500089 A1 EP 4500089A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transport medium
- energy transport
- heating circuit
- heating
- network
- 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.)
- Pending
Links
Classifications
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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
- F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
-
- 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
- F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
-
- 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
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/238—Flow rate
-
- 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
- F24H15/305—Control of valves
- F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
-
- 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
- F24H15/305—Control of valves
- F24H15/315—Control of valves of mixing valves
-
- 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
- F24H15/305—Control of valves
- F24H15/325—Control of valves of by-pass 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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0235—Three-way-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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/044—Flow sensors
Definitions
- the present invention relates to a method for controlling a heating system, a heating system and a control device for use in a heating system.
- Heating systems for air conditioning a building are known from the prior art, in their usual use room temperatures in the rooms of the building are to be controlled in a targeted manner.
- Such heating systems generally include a heat source device for controlling the temperature of an energy transport medium and a network through which this energy transport medium flows.
- the energy transport medium can be distributed over one or more heating circuits, each of which includes one or more heat exchange devices, which are usually assigned to a room to be air-conditioned and via which a heat exchange takes place between the energy transport medium in the network and an environment of the heat exchange device, for example to regulate a room temperature in the respective room.
- a flow rate of the energy transport medium in a heating circuit depends on a variety of factors. For example, if a control valve of a heat exchange device is closed when a desired target temperature is reached, the flow of the energy transport medium in the associated heating circuit may be completely stopped, which leads to a drop in the flow rate or, in extreme cases, even to a complete cessation of the flow of the energy transport medium in the network can come.
- the temperature-controlled energy transport medium can no longer be adequately removed from the heat source device and this results in both an extremely excessive flow resistance in the network and an energy backlog, which under certain circumstances can lead to an emergency shutdown or even damage to the heating system.
- bypass solutions in the prior art in which a flow of the energy transport medium is made possible even in the extreme case of a closed heating circuit outlined above, by the heating circuit
- a bridging bypass is opened via a bypass valve so that the flow of the energy transport medium in the network does not come to a complete standstill.
- the bypass is preferably opened depending on a detected volume flow or a flow rate of the energy transport medium in the network
- DE 10 2011 001223 A1 discloses a heating system with a heat source device and a hydraulic network with a heating circuit, a bypass device and a volume flow sensor.
- a control device of the heating system is set up to bridge the heating circuit via the bypass device by opening a bypass valve if a total volume flow detected by the volume flow sensor falls below a minimum value of the total volume flow in the heating system, for example in the event that a control valve in the heating circuit closes
- said heating systems usually only have one volume flow sensor, which is arranged on a central flow or return line at the interface to the heat source device and a resulting total volume flow, i.e. a sum of all Partial volume flows in the network are recorded
- An object of the present invention is therefore to provide a more efficient way of controlling a heating system compared to the prior art.
- a heating system according to claim 15 and a control device for a heating system according to claim 16 are provided.
- a method for controlling a heating system comprising at least one heat source device for controlling the temperature of an energy transport medium and a network connected to the heat source device for passing the energy transport medium through.
- the latter in turn comprises a flow for introducing the energy transport medium tempered by the heat source device into the network, a return for returning the energy transport medium in the network into the heat source device, a first heating circuit arranged between the flow and the return, which comprises a heat exchange device to be supplied with the energy transport medium, and a bypass device arranged between the flow and the return for bridging the first heating circuit, which comprises a switchable valve unit for regulating the energy transport medium passed through the bypass device.
- the method includes setting a first limit value for a total volume flow of the energy transport medium in the network, which describes a minimum value to be maintained of the total volume flow of the energy transport medium in the network, and setting a second limit value for the total volume flow of the energy transport medium in the network, which is greater than the first limit value Detecting a total volume flow of the energy transport medium in the network and controlling the heating system depending on the detected total volume flow, in turn comprising increasing a degree of opening of the valve unit of the bypass device if the detected total volume flow falls below the specified first limit value, and reducing the degree of opening of the valve unit of the bypass device if the recorded total volume flow exceeds the specified second limit value.
- the energy transport medium is distributed starting from the heat source device over the network, which is to be understood as a hydraulic or as a pneumatic network with lines connecting the components of the network (for example one or more heating circuits, heat storage, etc.) or a connecting line network is.
- a heating circuit of the network supplied with the energy transport medium has at least one heat exchange device, via which a heat exchange takes place between the energy transport medium flowing in the network and an environment of the heat exchange device, in particular a room in a building to be air-conditioned by the heat exchange device.
- the energy flow is based on a prevailing temperature difference and can be directed in both directions, i.e. starting from the energy transport medium or towards the energy transport medium.
- the heat exchange devices can, for example and not by way of limitation, be used as surface heat exchangers for use in a floor, a wall or a ceiling air-conditioned room or as well-known radiators arranged in the room to be air-conditioned.
- a heating circuit of the heating system is to be understood as a part of the network, which can include at least one but also a large number of heat exchange devices, which are connected in series, in parallel or in any combination of the two circuits mentioned above in relation to a direction of passage of the energy transport medium can be arranged.
- a first heating circuit can comprise only one surface heat exchanger or a large number of surface heat exchangers connected in parallel, for example all surface heat exchangers on one floor of the building.
- any liquid or gaseous medium that is suitable for energy transport or for heat exchange in the heat exchange devices in the network can be used as the energy transport medium.
- water or an aqueous solution is preferably used and in the pneumatic case, air is preferably used.
- the heat source device is set up to control the temperature of the energy transport medium and can be used for this purpose in a heating and/or in a cooling operation in order to heat and/or cool the energy transport medium.
- the heating operation is suitable for increasing a room temperature of an exemplary room to be air-conditioned by the heating system to a desired higher room temperature
- the cooling operation is suitable for lowering the room temperature of the exemplary room to a desired lower room temperature.
- the heat source device may be a gas/oil or pellet heater.
- the functionality of a heat pump is well known to those skilled in the art and will not be discussed in detail below.
- the switchable valve unit of the bypass device can be switched between a fully open and a closed state and preferably comprises one or more intermediate stages. Particularly preferably, the valve unit can be switched continuously between the closed and the fully open state. The same applies to all valve units described below that have the addition “switchable”.
- the total volume flow is understood to mean the resulting volume flow of the energy transport medium passed through the network, for example at Flow or return is applied or can be detected and describes the sum of all partial volume flows by components and / or component groups arranged in parallel in the network
- the method provides a particularly efficient option for controlling the heating system, in the course of which disadvantageous operating states of the heating system are avoided.
- Said disadvantageous operating states include, among other things, an operating state with insufficient energy consumption at the heat source device but also an operating state with insufficient supply of the first heating circuit with the temperature-controlled energy transport medium.
- the energy requirement in the first heating circuit is met, there is a reduction in the flow of the energy transport medium there, for example due to a closing of a control valve in the first heating circuit, for example a thermostat valve of the heat exchanger in the first heating circuit, which leads to a drop in the total volume flow of the Energy transport medium in the network
- the thermal energy (or cold energy in cooling mode) transferred to the energy transport medium from the heat source device can no longer be sufficiently removed from the heat source device via the network, as a result of which Without remedial action, an emergency shutdown or possibly even damage to the heat source device can occur.
- Opening the valve unit of the bypass device depending on the value falling below the first limit prevents such an unfavorable operating state and ensures that the first heating circuit is bridged in the event of a reduced flow by giving the energy transport medium the opportunity to return through the bypass device to flow back. In this way, a corresponding minimum value of the total volume flow in the network and thus an energy consumption at the heat source device can be maintained.
- the exemplary control valve in the first heating circuit opens in order to allow the energy transport medium to flow through it again.
- an operating state is disadvantageous from an energy perspective, since part of the heat or cold energy provided by the energy transport medium is passed through the bypass device unused, even though there is a need in the first heating circuit.
- the valve unit of the bypass device is closed if the recorded total volume flow exceeds the second limit value.
- Exceeding the second limit value provides information about changing partial volume flows in the network and serves in particular as an indicator for an increase in the flow of the energy transport medium in the first heating circuit and thus for a corresponding energy requirement in the same.
- the degree of opening of the valve unit of the bypass device is reduced after the second limit value is exceeded, whereby the otherwise unused heat or cold energy is redistributed from the bypass device to the first heating circuit
- the reduction in the degree of opening of the valve unit of the bypass device is preferably carried out under the condition that the specified minimum value of the total volume flow is maintained (first limit value).
- the degree of opening is therefore only reduced to the extent that this does not result in the first limit value being undershot
- the method thus allows efficient control of the heating system, with which both an energy consumption at the heat source device by maintaining the minimum value of the total volume flow and an efficient and, above all, demand-oriented energy supply to the first heating circuit when using a bypass device is made possible, without relying on additional volume flow sensors in the first heating circuit or in the bypass device.
- the network further comprises a switchable first valve unit connected upstream of the first heating circuit for regulating the energy transport medium passed through the first heating circuit, wherein controlling the heating system further comprises increasing a degree of opening of the first valve unit if the detected total volume flow is exceeds the specified second limit value
- the method is provided with an additional actuator for controlling the heating system, with which the flow of the energy transport medium through the first heating circuit can be regulated.
- valve unit of the bypass device and the first valve unit are both designed as part of a distribution device of the network, in particular the distribution device is a three-way valve, such that increasing the degree of opening of the valve unit of the bypass device reduces the Degree of opening of the first valve unit and vice versa and a reduction of the Degree of opening of the valve unit of the bypass device causes an increase in the degree of opening of the first valve unit and vice versa
- valve units can be designed as part of a single distribution device, which reduces both the manufacturing costs of the heating system and the maintenance effort during operation. Likewise, a simultaneous closing of both valve units due to possibly incorrect switching is prevented, as a result of which the heat source device would have to work against a closed network, which would lead to an emergency shutdown or, in extreme cases, even to damage.
- the network comprises a second heating circuit arranged between the flow and the return, which comprises a further heat exchange device to be supplied with the energy transport medium, wherein controlling the heating system further involves regulating a quantitative ratio between a quantity passed through the first heating circuit of the energy transport medium and an amount of the energy transport medium passed through the second heating circuit.
- the heating system is expanded to include a further heating circuit to be supplied with the energy transport medium, whereby the quantitative ratio of the energy transport medium to be conducted through the two heating circuits can be regulated, preferably depending on the respective energy requirement.
- the advantages according to the invention of maintaining the minimum value of the total volume flow as well as the efficient energy supply also extend to the second heating circuit.
- the use of a second heating circuit makes it possible to provide modular heating systems in which a single heating circuit, for example, includes all heat exchangers on a single floor of a building.
- the network comprises a switchable second valve unit connected upstream of the second heating circuit for regulating the energy transport medium passed through the second heating circuit, the quantitative ratio being regulated by adjusting a degree of opening of the second valve unit
- the method is provided with an additional actuator for controlling the heating system, with which the flow of the energy transport medium through the second heating circuit can be regulated, which in turn has an influence on the quantitative ratio
- the second heating circuit is designed as part of the bypass device, wherein the bypass device comprises a bypass line arranged between the valve unit of the bypass device and the return of the network and the second heating circuit is arranged parallel to the bypass line, the regulation of the Quantitative ratio by adjusting the degree of opening of the valve unit of the bypass device and / or the first valve unit (if present).
- the second heating circuit is integrated into the bypass device, whereby a particularly compact design of the heating system can be provided without additional distribution devices.
- the second heating circuit in the bypass device acts as an energy consumer, so that in the case of a closed first heating circuit, the heat or cold energy of the energy transport medium flowing through the bypass can be used in the heat exchange device of the second heating circuit. This also requires an increase in the temperature difference of the energy transport medium between the flow and return and thus counteracts overheating or undercooling of the heat source device due to a lack of energy dissipation.
- the second heating circuit comprises a heating circuit pump for regulating the energy transport medium passed through the second heating circuit, the quantitative ratio being regulated by adjusting a pump power or a speed of the heating circuit pump.
- the method is provided with an additional actuator for controlling the heating system, with which the flow of the energy transport medium through the second heating circuit can be regulated.
- the procedure continues to include determining a first heating requirements for the first heating circuit, which describes an energy quantity to be available to the first heating circuit through the energy transport medium, and determining a second heating requirements for the second heating circuit, which is through the second heating circuit through the second heating circuit the energy transport medium describes the amount of energy to be provided, the heating system being controlled depending on the determined first and second heating power requirement values, in particular the quantitative ratio being regulated depending on said heating power requirement values.
- the method is expanded to include an energy requirement-based functionality, in the course of which the energy transport medium is distributed based on the heating power requirement values mentioned.
- the temperature-controlled energy transport medium can be increasingly made available to the heating circuit in which there is a higher energy or power requirement.
- the dependencies when controlling the heating system are prioritized in such a way that controlling the heating system depending on the detected total volume flow has priority over controlling the heating system depending on the heating power requirement values.
- control actions to be carried out by the method regarding the recorded total volume flow always displace other control actions based on the heating power requirement values, in order primarily to ensure compliance with the volume flow-based boundary conditions.
- regulating the quantitative ratio includes increasing the amount of energy transport medium passed through the first heating circuit if the first heating power requirement value exceeds the second heating power requirement value, and increasing the amount of energy transport medium passed through the second heating circuit if the first heating power requirement value falls below the second heating power requirement value
- determining the first heating power requirement value includes setting a target temperature for a first environment to be tempered by the heat exchange device of the first heating circuit, detecting an actual temperature of the first environment and determining the first heating power requirement value depending on a Difference between the specified target temperature and the recorded actual temperature of the first environment. Additionally or alternatively, determining the second heating power requirement value includes setting a target temperature for a second environment to be tempered by the further heat exchange device of the second heating circuit, detecting an actual temperature of the second environment and determining the second heating power requirement value depending on a difference between the specified Target temperature and recorded actual temperature of the second environment.
- the heating power requirement values are provided depending on the environment to be air-conditioned by the heat exchange device, so that the heating system can be controlled in an advantageous manner with regard to the room temperatures to be controlled.
- determining the first heating power requirement value includes setting a target temperature of the energy transport medium in the first heating circuit for a first point upstream of the heat exchange device with respect to a direction of passage of the energy transport medium, detecting an actual temperature of the energy transport medium at the first point and determining the first heating power requirement value depending on a difference between the specified target temperature and the recorded actual temperature at the first point.
- determining the second heating power requirement value includes setting a target temperature of the energy transport medium in the second heating circuit for a second point upstream of the further heat exchange device with respect to a direction of passage of the energy transport medium, detecting an actual temperature of the energy transport medium at the second point and determining of the second heating power requirement value depending on a difference between the specified target temperature and the recorded actual temperature at the second location.
- the heating power requirement values are provided with the aim of maintaining a predetermined target temperature of the energy transport medium in the respective heating circuit.
- control of room temperatures in the rooms tempered by the heat exchange devices of the heating system can be optimized in such a way that the control can be carried out by control valves of the heat exchange devices themselves, whereby a largely constant input temperature of the energy transport medium can be assumed.
- This allows a simple combination of control of the heating system with a separately provided room temperature control, which can advantageously be based on a constant temperature of the energy transport medium provided to the heat exchange device.
- the method further comprises controlling a temperature of the energy transport medium in the second heating circuit, wherein controlling the temperature of the energy transport medium in the second heating circuit in particular returns a portion of the energy transport medium discharged from the further heat exchange device to an inlet of the second heating circuit and includes admixing the returned portion to the energy transport medium supplied through the inlet of the second heating circuit.
- a heating system comprising a heat source device for controlling the temperature of an energy transport medium and a network connected to the heat source device for passing the energy transport medium through, which in turn has a flow for introducing the energy transport medium tempered by the heat source device into the network Return for returning the energy transport medium in the network into the heat source device, a first heating circuit arranged between the flow and the return, which comprises a heat exchange device to be supplied with the energy transport medium, a bypass device arranged between the flow and the return for bridging the first heating circuit, which has a switchable Valve unit for regulating the energy transport medium passed through the bypass device, and a volume flow measuring device for detecting a total volume flow of the energy transport medium in the network, in particular at the flow or is arranged on the return.
- the heating system comprises a control device for controlling the heating system, which is coupled at least to the valve unit of the bypass device and is set up to adjust a degree of opening of the valve unit, wherein the control device is set up to increase the degree of opening of the valve unit of the bypass device in the course of controlling the heating system , if a total volume flow recorded by the volume flow measuring device falls below a specified first limit value provided to the control device for a total volume flow of the energy transport medium in the network, which describes a minimum value to be maintained of the total volume flow of the energy transport medium in the network, and is set up to increase the degree of opening of the valve unit of the bypass device reduce if the total volume flow recorded by the volume flow measuring device exceeds a specified second limit value provided to the control device for the total volume flow of the energy transport medium in the network, which is greater than the first limit value.
- the heating system according to the second aspect can therefore be controlled based on the method according to the first aspect with all the advantages mentioned in this regard.
- the network further comprises a switchable first valve unit, which is connected upstream of the first heating circuit and is coupled to the control device, for regulating the energy transport medium passed through the first heating circuit, wherein the control device is set up to increase a degree of opening of the first valve unit, if the degree of opening is detected Total volume flow exceeds the specified second limit value
- valve unit of the bypass device and the first valve unit are both designed as part of a distribution device of the network, in particular the distribution device is a three-way valve, such that increasing the degree of opening of the valve unit of the bypass device reduces the degree of opening of the first valve unit and vice versa and reducing the degree of opening of the valve unit of the bypass device requires increasing the degree of opening of the first valve unit and vice versa
- the network comprises a second heating circuit arranged between the flow and the return, which comprises a further heat exchange device to be supplied with the energy transport medium.
- the network comprises a switchable second valve unit upstream of the second heating circuit and coupled to the control device for regulating the energy transport medium passed through the second heating circuit, the control device being set up to determine a quantitative ratio between an amount of the energy transport medium passed through the first heating circuit and to regulate an amount of energy transport medium passed through the second heating circuit by adjusting an opening degree of the second valve unit and / or the valve unit of the first heating circuit (if present).
- the second heating circuit is designed as part of the bypass device, wherein the bypass device comprises a bypass line arranged between the valve unit of the bypass device and the return of the network and the second heating circuit is arranged parallel to the bypass line, the control device being set up to determine the quantitative ratio to regulate an adjustment of the degree of opening of the valve unit of the bypass device.
- the second heating circuit comprises a heating circuit pump coupled to the control device for regulating the energy transport medium passed through the second heating circuit, wherein the control device is set up to regulate the quantitative ratio by adjusting a pump power of the heating circuit pump.
- the control device is set up to have a first heating power requirement value for the first heating circuit, which describes an amount of energy to be provided to the first heating circuit by the energy transport medium, and a second heating power requirement value for the second heating circuit, which describes an amount of energy to be provided to the second heating circuit through the energy transport medium, to determine and to control the heating system depending on the determined first and second heating power requirement values and in particular to regulate the quantitative ratio depending on the determined first and second heating power requirement values.
- control device is set up to increase the amount of energy transport medium passed through the first heating circuit if the first heating power requirement value exceeds the second heating power requirement value, and to increase the amount of energy transport medium passed through the second heating circuit if the first heating power requirement value exceeds the falls below the second heating output requirement value
- the heating system comprises a first setpoint generator for determining a target temperature for a first environment to be tempered by the heat exchange device of the first heating circuit and a first temperature sensor for detecting an actual temperature of the first environment, the control device being set up to be the first To determine the heating power requirement value depending on a difference between the specified target temperature and the recorded actual temperature of the first environment.
- the heating system comprises a second setpoint generator for determining a target temperature for a second environment to be tempered by the heat exchange device of the second heating circuit and a second temperature sensor for detecting an actual temperature of the second environment, the control device being set up to be the second To determine the heating power requirement value depending on a difference between the specified target temperature and the recorded actual temperature of the second environment.
- the heating system preferably comprises a third setpoint generator for determining a target temperature of the energy transport medium in the first heating circuit for a first point upstream of the heat exchange device with respect to a direction of passage of the energy transport medium and a third temperature sensor for detecting an actual temperature of the energy transport medium at the first point , wherein the control device is set up to determine the first heating power requirement value depending on a difference between the specified target temperature and the recorded actual temperature at the first point.
- the heating system comprises a fourth setpoint generator for determining a target temperature of the energy transport medium in the second heating circuit for a second point upstream of the further heat exchange device with respect to a direction of passage of the energy transport medium, and a fourth temperature sensor for detecting an actual temperature of the energy transport medium at the second point , wherein the control device is set up to determine the second heating power requirement value depending on a difference between the specified target temperature and the recorded actual temperature at the second location.
- control device is set up to control a temperature of the energy transport medium in the second heating circuit and, for this purpose, in particular comprises a return device with which a portion of the energy transport medium discharged from the second heating circuit is returned to an inlet of the second heating circuit and the returned portion to that through which Inlet of the second heating circuit is added to the tempered energy transport medium coming from the heat source device.
- the control device is preferably set up to adapt the proportion to be returned by adjusting the pump power or the speed of the heating circuit pump of the second heating circuit.
- a control device for use in a heating system according to the second aspect of the invention.
- FIG. 1 shows a flowchart of an exemplary embodiment of the method according to the invention for controlling the heating system.
- FIGS. 2 and 3 show schematic exemplary embodiments of the heating system according to the invention.
- 4 shows schematically various operating states of an exemplary embodiment of the heating system according to the invention.
- FIG. 5 shows exemplary time curves of various operating variables in the course of an exemplary embodiment of the method according to the invention for controlling the heating system.
- FIG. 1 shows a flowchart of an exemplary embodiment of the method according to the invention for controlling the heating system.
- the underlying heating system comprises at least one heat source device for controlling the temperature of an energy transport medium and a network connected to the heat source device for passing the energy transport medium through.
- the latter in turn comprises a flow for introducing the energy transport medium tempered by the heat source device into the network, a return for returning the energy transport medium in the network into the heat source device, a first heating circuit arranged between the flow and the return, which comprises a heat exchange device to be supplied with the energy transport medium, and a bypass device arranged between the flow and the return for bridging the first heating circuit, which comprises a switchable valve unit for regulating the energy transport medium passed through the bypass device.
- a first limit value Gi is set for a total volume flow of the energy transport medium in the network, which describes a minimum value to be maintained of the total volume flow of the energy transport medium in the network
- a second limit value G2 is set for the total volume flow of the energy transport medium in the network, which is greater than the first limit value.
- step S3 a total volume flow Q to t of the energy transport medium in the network is recorded, in particular on the supply or return line.
- step S4 the heating system is controlled depending on the total volume flow Q to t recorded in step S3 and the limit values Gi and G2 from steps S1 and S2.
- step S4 includes a comparison step S4.1, from which one of the steps S4.2, S4.3 or S5 follows
- step S5 The method is not limited to this case of the direct transition from step S4.1 to step S5.
- any number of further steps can be taken at this point to adapt the operating variables of the heating system depending on the total volume flow recorded.
- an adjustment of operating variables of the heat source device for example an operating power or a supply pressure of the energy transport medium at the flow, can be carried out.
- step S5 a pause of a predetermined length occurs before the method is repeated starting from step S3.
- the process steps are repeated as often as desired in order to provide continuous control of the heating system.
- FIG. 2A shows a schematic exemplary embodiment of the heating system 1 according to the invention.
- the heating system 1 includes a heat pump 10 as a heat source device, a hydraulic network 20 and a control device 30 for controlling the heating system 1.
- the heat pump 10 is connected to the hydraulic network 20 via a flow 201 and a return 209 and is set up to control the temperature of an energy transport medium.
- the heat pump 10 is connected to an ambient energy source, for example a geo- or aerothermal energy source, via corresponding connecting lines 2.
- the tempered energy transport medium is then passed through the hydraulic network 20 in accordance with the arrow directions shown.
- the hydraulic network 20 set up to convey the energy transport medium includes several lines 200 (bold connecting lines) as well as components connected to one another by these. These include a distribution system 202a, a first heating circuit 203 branching off from it, a bypass device 204, a volume flow sensor 205 arranged on the return 209 for detecting a volume flow of the energy transport medium passed through the return 209 of the hydraulic network 20, and a flow 201 arranged temperature sensor 251 for detecting a temperature of the energy transport medium at the flow 201 of the hydraulic network.
- the volume flow sensor 205 and the temperature sensor 251 are coupled to the control device 30 and set up to transmit the measured values recorded by the sensors to the control device 30
- the energy transport medium which is tempered by the heat pump 10, is fed into the hydraulic network 20 via the flow 201, passed through it and returned to the heat pump 10 via the return line 209
- the first heating circuit 203 comprises a plurality of heat exchangers 232, which is designed as a parallel connection of one heat exchanger 232 and a series connection of two further heat exchangers 232.
- the individual heat exchangers can each include control valves, for example thermostat valves, which are shown in FIG. 2A however, are not shown.
- the bypass device 204 arranged between the flow 201 and the return 209 serves to bridge the first heating circuit 203 and in the present case comprises a switchable bypass valve 241 coupled to the control device 30 for regulating the energy transport medium passed through the bypass device 204 and one connected downstream of the bypass valve 241 Bypass system 240a, which in the present case only includes a bypass line 242 opening into the return 209.
- the bypass valve 241 is part of the distribution system 202a, which can also be designed in alternative embodiments according to FIG. 2B or FIG. 2C.
- control device 30 is designed separately and coupled to the heat pump 10, but can also be designed as part of the heat pump 10.
- the control device 30 is set up at least to adjust an opening degree of the bypass valve 241 of the bypass device 204.
- the first heating circuit 203 is bridged if it can no longer ensure a sufficient total volume flow in the hydraulic network, for example as a result of a closing control valve in a heat exchanger 232.
- control device 30 is set up to reduce the degree of opening of the bypass valve 241 if the total volume flow detected by the volume flow sensor 205 exceeds a specified second limit value provided to the control device 30 for the total volume flow of the energy transport medium in the network 20, which is greater than that first limit value, exceeds. In this way, an energetically unfavorable state with an unnecessary bridging of the first heating circuit 203 via the bypass device 204 is avoided, in which the energy transport medium is again primarily passed through the first heating circuit 203 in the case mentioned.
- a particularly efficient heating system 1 is thus provided, in which disadvantageous operating states are avoided.
- Said disadvantageous operating states include, among other things, an operating state with insufficient energy consumption at the heat pump 10 but also an operating state with insufficient supply of the first heating circuit 203 with the temperature-controlled energy transport medium.
- 2B to 2E show various alternatives for components of the heating system 1 from FIG. 2A in a schematic representation.
- FIG. 2B and 2C show alternative distribution systems 202b and 202c that can be used in place of the distribution system 202a of FIG. 2A.
- the respective connections of the distribution systems are labeled V for flow, B for bypass system and Hi for the first heating circuit.
- the distribution system 202b from FIG. 2B includes a switchable control valve 231 for the first heating circuit 203, which is also electrically connected to the control device 30 from FIG. 2A. This provides the control device 30 with a further actuator for controlling the heating system 1, via which in particular the flow through the first heating circuit 203 can be regulated.
- bypass valve 241 and the switchable control valve 231 for the first heating circuit 203 are combined in a switchable valve device, which in the present case is designed as a switchable 3/2-way valve 221, which is electrically connected to the control device 30 from Fig. 2A is connected.
- control device 30 is set up to set the degrees of opening of the respectively coupled valves 231, 241 and 221.
- FIG. 2D and 2E show alternative bypass systems 240b and 240c that can be used in place of the bypass system 240a of FIG. 2A.
- the bypass system 240b from FIG. 2D comprises a second heating circuit 206 arranged parallel to a bypass line 242 with a further heat exchanger 232 to be supplied by the energy transport medium and one with the control device 30 from FIG. 2A electrically connected heating circuit pump 233, whose pump power can be used to regulate the amount of energy transport medium passed through the second heating circuit 206.
- a temperature sensor 252 which is electrically connected to the control device 30 from FIG. 2A, is arranged in front of the second heating circuit 206 for detecting a temperature of the energy transport medium flowing into the second heating circuit 206.
- the heat or cold energy contained in the energy transport medium (depending on the operating state of the heat pump 1) can be transferred to an environment of the heat exchanger 232, in order to ensure efficient operation the heat source device 10 to increase the required temperature difference of the energy transport medium between the flow 201 and return 209 and to use said energy to control the temperature of the environment of the heat exchanger 232 of the second heating circuit 206.
- the bypass system 240c from Fig. 2E comprises an energy storage 270 for a storage medium (for example water) that can be introduced into and discharged into the energy storage 270, the storage medium being heated or cooled via a heat exchanger by the energy transport medium flowing through the bypass system 240c.
- a storage medium for example water
- the heat or cold energy contained in the energy transport medium (depending on the operating state of the heat pump 1) can be transferred to the storage medium in order to achieve the temperature difference required for the efficient operation of the heat source device 10
- Energy transport medium between flow 201 and return 209 without releasing the heat or cold energy to be withdrawn from the energy transport medium unused into an environment of the heating system 1.
- thermal energy from the energy transport medium flowing through the bypass system 240c can be used to heat process water.
- FIG. 3 shows a further schematic exemplary embodiment of the heating system 1 according to the invention.
- the basic structure essentially corresponds to that of FIG. 2A, with a distribution system 202d with an additional outlet being used here.
- the distribution system 202d includes a switchable 4/3- Directional valve, wherein an outlet leads to a first heating circuit 203, an outlet to a bypass device 204 with a bypass system 240b with a second heating circuit 206 according to FIG. 2D and an outlet to an energy storage system 207, which includes an energy storage 270 according to FIG. 2E.
- a heating system 1 which provides the energy storage 270 in addition to the bypass device 204, which includes the second heating circuit 206.
- excess heat or cold energy from the energy transport medium can be transferred either via the heat exchanger 232 in the second Heating circuit 206 can be withdrawn, or, if an energy requirement in the second heating circuit 206 is also covered, this can be transferred via the energy storage 270 to the storage medium contained therein.
- FIGS. 4A to 4F shows schematically different operating states of an exemplary embodiment of the heating system according to the invention in the sequence from FIGS. 4A to 4F.
- the heating system on which FIG. 4 is based corresponds to the exemplary embodiment shown in FIG. 2A, in which the distribution system 202c according to FIG. 2C was selected.
- FIG. 4A to 4F show a valve position of the distribution system comprising a switchable 3/2-way valve, which is indicated by the arrow position, which represents a ratio of the degrees of opening between the first valve unit for the first heating circuit (Hi) and the valve unit of the bypass device (B) describes Starting from the position at Hi (see Fig. 4A), an arrow position of 90 ° corresponds to a 50 percent opening of the first valve unit and a 50 percent opening of the valve unit of the bypass device and a Arrow position of 180° corresponds to a closed first valve unit (0% opening degree) and a fully opened valve unit of the bypass device (100% opening degree).
- the first and second limit values are given by Gi and G2.
- valve unit of the bypass device (B) is closed and the total volume flow (return) corresponds to the volume flow through the first heating circuit (Hr).
- the total volume flow (return) also drops (see Fig .4B). In the present case, this even drops below the first limit value Gi, which describes the minimum value of the total volume flow.
- valve unit of the bypass device (B) is completely closed and that of the first heating circuit (Hi) is thus completely opened again, so that the total volume flow (return) again corresponds to the volume flow through the first heating circuit (Hi) (see Fig. 4F ).
- the underlying heating system can be advantageously controlled in such a way that bridging of the first heating circuit via the bypass device is avoided in energetically unfavorable operating states, i.e. in operating states with an energy requirement of the first heating circuit when the valve unit of the bypass device is at least partially open .
- 5A and 5B show exemplary time curves of various operating variables in the course of an exemplary embodiment of the method according to the invention for controlling a heating system, which is based on the exemplary embodiment shown in FIG. 2A, in which the bypass system 240b according to FIG. 2D was selected.
- the degree of opening of the bypass valve of the bypass device is shown on the right ordinate.
- the degree of opening can take values between “0” and “1", where “0” corresponds to a closed bypass valve and “1" corresponds to a fully opened bypass valve
- 5A shows the time profiles of the total volume flow Q to t and the volume flow Qi in the first heating circuit. Although only the total volume flow is recorded as part of the method for controlling the heating system, the volume flow Qi is shown for the purpose of explaining the method.
- the volume flow Qi and thus also the total volume flow Q to t decrease due to a closing control valve in the first heating circuit.
- said control valve closes completely, as a result of which the volume flow Qi drops to zero and the total volume flow Q also drops to t.
- the degree of opening of the bypass valve of the bypass device at time ti, at which the total volume flow Q to t reaches a first limit value Gi falls below increases
- the first heating circuit is increasingly bridged and the total volume flow Q to t increases again.
- the volume flow Qi and thus also the total volume flow Q to t increase again due to the opening control valve in the first heating circuit.
- the total volume flow Q to t exceeds a second limit value G2, as a result of which the degree of opening of the bypass valve is reduced again, since there is now an energy requirement in the first heating circuit and the bridging via the bypass device can be reduced.
- FIG. 5B shows the temperature curves of the energy transport medium in the network associated with FIG. 5A.
- Ti describes the temperature of the energy transport medium at the flow, as recorded by the temperature sensor 251 (see FIG. 2A), and also corresponds to the temperature at the inlet of the first heating circuit if it is open.
- T2 describes the temperature in front of the second heating circuit, as detected by the temperature sensor 252 (see FIG. 2D).
- the temperatures Ti or T2 of the energy transport medium should be kept as close as possible to the specified target temperatures Tsoii.i or Tsoii,2 in the course of controlling the heating system.
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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)
- Fluid Mechanics (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022107592.3A DE102022107592A1 (de) | 2022-03-30 | 2022-03-30 | Verfahren zum Steuern eines Heizungssystems, Heizungssystem und Steuervorrichtung |
| PCT/EP2023/057790 WO2023186783A1 (de) | 2022-03-30 | 2023-03-27 | Verfahren zum steuern eines heizungssystems, heizungssystem und steuervorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4500089A1 true EP4500089A1 (de) | 2025-02-05 |
Family
ID=85979562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23715795.3A Pending EP4500089A1 (de) | 2022-03-30 | 2023-03-27 | Verfahren zum steuern eines heizungssystems, heizungssystem und steuervorrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4500089A1 (de) |
| DE (1) | DE102022107592A1 (de) |
| WO (1) | WO2023186783A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4509770A1 (de) * | 2023-08-16 | 2025-02-19 | Danfoss A/S | Vorrichtung zur steuerung eines systems zum heizen und kühlen und zugehöriges verfahren |
| DE102024115906A1 (de) * | 2024-06-07 | 2025-12-11 | Vaillant Gmbh | Verfahren zum Betreiben eines Heizgerätes, Heizgerät, Computerprogramm und Verwendung einer Warmwasserbereitstellung |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2211108A5 (de) * | 1972-12-20 | 1974-07-12 | Pont A Mousson | |
| FR2724160B1 (fr) * | 1994-09-07 | 1997-01-17 | Comap | Installation de distribution d'un fluide circulant en circuit ferme, a regulation, et procede de reglage de cette installation |
| ATA119897A (de) | 1997-07-14 | 1998-09-15 | Seebacher Theodor | Anlage zur wärmeversorgung wenigstens eines verbraucherkreises |
| DE102004017593B3 (de) | 2004-04-07 | 2005-11-03 | Albert Bauer | Kühl- und/oder Heizvorrichtung |
| DE102011001223A1 (de) | 2011-03-11 | 2012-09-13 | SCHÜCO International KG | Heizungsanlage sowie Betriebsverfahren und Steuereinrichtung für eine Heizungsanlage |
| PL2613097T5 (pl) * | 2012-01-09 | 2021-06-14 | Grundfos Holding A/S | Przyrząd grzejny |
| GB2551407B (en) * | 2016-11-03 | 2018-04-25 | Esg Pool Ventilation Ltd | Hot water and energy storage |
| DE102021121888A1 (de) | 2021-08-24 | 2023-03-02 | Vaillant Gmbh | Verfahren zum Betrieb einer Brennwert-Heizanlage, Brennwert-Heizanlage sowie Computerprogramm |
-
2022
- 2022-03-30 DE DE102022107592.3A patent/DE102022107592A1/de active Pending
-
2023
- 2023-03-27 EP EP23715795.3A patent/EP4500089A1/de active Pending
- 2023-03-27 WO PCT/EP2023/057790 patent/WO2023186783A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023186783A1 (de) | 2023-10-05 |
| DE102022107592A1 (de) | 2023-10-05 |
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