WO2023217752A1 - Procédé de surveillance et/ou de commande d'un système de chauffage - Google Patents

Procédé de surveillance et/ou de commande d'un système de chauffage Download PDF

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Publication number
WO2023217752A1
WO2023217752A1 PCT/EP2023/062219 EP2023062219W WO2023217752A1 WO 2023217752 A1 WO2023217752 A1 WO 2023217752A1 EP 2023062219 W EP2023062219 W EP 2023062219W WO 2023217752 A1 WO2023217752 A1 WO 2023217752A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating
flow
correlation value
heat source
temperature
Prior art date
Application number
PCT/EP2023/062219
Other languages
German (de)
English (en)
Inventor
Martin Eckl
Original Assignee
KSB SE & Co. KGaA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KSB SE & Co. KGaA filed Critical KSB SE & Co. KGaA
Publication of WO2023217752A1 publication Critical patent/WO2023217752A1/fr

Links

Classifications

    • 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
    • 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
    • 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
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/254—Room 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
    • F24H15/258—Outdoor 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F24H15/34—Control of the speed of pumps
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
    • G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space
    • 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
    • F24D2220/0264—Hydraulic balancing 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
    • F24D2220/042—Temperature sensors

Definitions

  • the invention relates to a method for monitoring and/or controlling a heating system, comprising a pipeline network with variable system resistance, at least one heat source which feeds a heating medium with a defined flow temperature into the pipeline network, and at least one circulation pump for circulating the heating medium within the pipeline network.
  • a heat source in particular a boiler, heats the medium circulating in the pipe network to a specific flow temperature before it is conveyed back to the heat source via the return line after flowing through the radiators that can be controlled using thermostatic valves.
  • a circulation pump provides the flow.
  • the target flow or return temperature of the central heating is set by the heating control, whereby setting the flow temperature based on the outside temperature has proven successful in practice.
  • the heating control typically receives the current outside temperature via a sensor signal, which serves as an indication of the expected heat requirement of the area to be heated.
  • the heating control receives the target specification for the flow or return temperature to be set from a stored heating curve, which specifies the corresponding target temperature for the flow or return depending on at least one operating parameter, here the current outside temperature.
  • a heating curve is usually building-specific and can therefore be modified by the operator of the system in order to be able to adjust the temperature control as required.
  • both the steepness of the heating curve and, optionally, a possible offset can be set.
  • a heating curve that is set too flat means that the building is not supplied with sufficient heat at low temperatures. In contrast, if the curve is set too steep, the building is supplied with sufficient heat, but energy consumption increases unnecessarily due to boiler and pipe losses.
  • the heating curve is building-specific and is usually set too steep
  • the object of the present invention is to provide an improved option for controlling the temperature of the circulating heating medium, which overcomes the above-mentioned disadvantages.
  • this object is achieved by a method according to the features of claim 1.
  • Advantageous versions of the process are the subject of the pending claims.
  • the invention is also achieved by a circulation pump, heat source and/or heating system according to the features of claims 15 to 16.
  • the preheating temperature is understood to be the temperature that the heating medium has immediately downstream or at least in the vicinity of the heat source before it flows through a heat exchanger or radiator.
  • the return temperature is understood to be the temperature of the heating medium that the heating medium has when it flows from the pipe network back to the heat source, i.e. preferably immediately upstream of the heat source.
  • the design of the heat source is arbitrary, for example it can include a burner, a condensing boiler, a heat pump, etc.
  • the system resistance of the pipeline network is determined, for example measured or calculated or estimated based on other operating data.
  • the system resistance of the pipe network is dynamic in heating circuits with integrated fittings, such as valves, especially thermostatic valves, and is made up of a static and dynamic component.
  • the static component is determined by the pipe resistance of the pipe network.
  • the dynamic component depends on any fitting positions, in particular valve positions within the system, and primarily on the degree of opening of installed valves, in particular thermostat valves of the individual radiators or other heat exchangers within the system. Since the degree of opening of the valves, especially thermostatic valves, is characteristic of the current heat requirement in the respective room, conclusions can be drawn about the current heat requirement based on the system resistance, in particular the dynamic component.
  • the method can be used to evaluate, for example, whether the current control of the heating system, in particular the heat source, can cover the current heating requirement without consuming energy unnecessarily. This enables, for example, extensive options for system control, for example the process can be used in addition to an outside temperature-controlled heating control. Ideally, it is even possible to forego the outside temperature as a reference variable, making the use and installation of an outside temperature sensor unnecessary.
  • the method provides an evaluation of the current flow and/or return temperature, for example to the effect that the currently set flow and/or return temperature is too high or too low in order to ensure optimally efficient heating operation.
  • the current flow or return temperature can be determined using sensors, i.e. by at least one integrated sensor in the corresponding pipe section.
  • a sensor built into the circulation pump could also be used. It is also conceivable to determine the flow and/or return temperature using an estimation algorithm or to calculate them indirectly based on other operating parameters.
  • the estimation algorithm uses in particular operating parameters of the pump, such as the current pump speed and/or the torque of the pump drive unit, and is therefore sensibly carried out on or by the circulation pump.
  • the current system resistance could theoretically be measured. However, it is preferred to calculate the system resistance using the flow rate Q and/or the hydraulic pressure of the heating medium within the Attachment.
  • the latter parameters are available, for example, in the circulation pump or the heating control, so that a calculation of the system resistance for the current operating point is possible.
  • the flow rate and delivery head of the pump can be determined using sensors, for example. However, it is also conceivable that these values are also calculated based on other operating parameters of the circulation pump, for example the current power consumption and speed of the pump drive. In this case too, the use of an estimation algorithm to determine the flow rate and head, restrictive system resistance is conceivable.
  • the correlation value is determined by the ratio of the current flow or return temperature to the current system resistance. In this context, it makes sense to determine the correlation value continuously. However, the correlation value could alternatively only be recorded at certain time periods or cyclically.
  • the heat source or the internal temperature control can take into account a heating curve which, depending on at least one parameter, in particular the outside temperature, sets a specification for the target temperature of the flow and/or return. If this is the case, an evaluation of the heating curve used can be made by evaluating the correlation value determined according to the invention.
  • the ideal flow or return temperature would always be set under all possible operating conditions, which covers the current heating requirement but does not consume energy unnecessarily.
  • the heating curve is If it is set too steeply, i.e. the flow temperature would be set too high for the current heating requirement, the thermostat valves have to throttle away the excess heat input, which increases the system resistance. The relationship and thus the correlation value between flow/return temperature and system resistance changes.
  • the slope and/or an offset value of the heating curve is assessed as too low.
  • the evaluation result can, for example, be provided in the form of a recommendation for action for adjusting the heating curve as electronic information that can be communicated to any external device.
  • a visual or acoustic information display of the result is also conceivable. Such an approach makes sense and is conceivable, for example, if the process is carried out entirely by a circulation pump.
  • the method can also provide for an automatic adjustment of the heating curve in order to increase its parameters, in particular the slope and/or offset value.
  • the slope of the heating curve can be assessed as too large. In this case, the heating curve could be automatically adjusted to reduce the slope of the curve.
  • the heating curve is optimally or at least sufficiently well adjusted. In this case, the heating curve is not adjusted.
  • the above statements refer to an adjustment of the heating curve of a heating control system.
  • the basic idea of the application that is essential to the invention can also be applied to heating controls that are not based on the outside temperature or do not control the flow temperature using a stored heating curve. Under such conditions, the method can also be used sensibly; in fact, the method may make it unnecessary to record and take the outside temperature into account. It is conceivable, for example, for the heating control to initially adjust the flow and/or return temperature to a predefined setpoint.
  • a subsequent adjustment of the flow temperature is then carried out exclusively or at least largely based on the specific correlation value, which makes it possible to make an exact statement about the current heating requirement.
  • an external sensor for detecting the outside temperature of the building could be dispensed with and instead control could be carried out exclusively on the basis of the proposed method according to the invention.
  • further parameters are taken into account for setting the flow and/or return temperature.
  • the method according to the invention is not used, or at least not only in regular operation, but instead a test procedure can be carried out, during which the flow temperature is specifically manipulated in order to determine the behavior of the system, in particular the change in the system resistance, based on this determine.
  • This approach enables, for example, a targeted optimization process or a learning function for setting the operating parameters of a heating control system.
  • the method according to the invention can also be combined with any other control functions of a heating control or can be superimposed on these already implemented control functions.
  • the type and extent of the automatic adjustment of the heating curve can be adjusted using one or more configurable parameters. In this context, a configurable risk factor is conceivable that determines the scope for change for adjusting the heating curve.
  • a resident feedback function can be implemented, which provides feedback from the resident using appropriate input means, in particular using operating means on the pump and/or the heating control and/or via external communication means, such as a smartphone or tablet with an installed application Heating buildings are recorded and taken into account for further execution of the process. This means that a manual evaluation of a previously made adjustment to the heating curve can be taken into account and included for future adjustments.
  • the invention also relates to a pump, in particular a centrifugal pump, with a pump control that is configured to carry out the method according to the invention, the pump preferably being communicatively connected to a heating control of the heat source via at least one interface in order to carry out an evaluation and/or adjustment the heating curve.
  • a heat source in particular a burner/boiler, with an internal heating control which is configured to carry out the method according to the invention, the heat source preferably being communicatively connected to a circulation pump of the heating system via at least one interface in order to carry out an evaluation and/or adjust the heating curve.
  • the invention also includes a heating system which has at least one pump and a heat source, wherein the pump and/or the heat source each have a controller and/or a central controller which are configured to carry out the method according to the invention.
  • the execution of the method or the individual method steps can be carried out entirely by the pump control or the heating control.
  • a distributed method execution is also conceivable, with substeps being carried out on both the pump control and the heating control.
  • the individual controls in particular the pump control and/or the heating control, can communicate with one another via suitable interfaces.
  • Figure 1 a diagram showing the time course of the flow temperature and the system resistance within a heating system
  • Figure 2 a diagram showing the time course of the calculated correlation value
  • Figure 3 a schematic representation of the flow chart of the method according to the invention.
  • the method according to the invention will be explained using the example of a heating system which, for example, includes a boiler as a heat source and sets the flow temperature using a heating curve.
  • the heat transfer medium is circulated in the pipeline network using a heating circulation pump, which pumps the medium in the circuit depending on the operating point, depending on a flow rate and a certain delivery head.
  • the system resistance is influenced by the valve position of individual thermostat valves on the radiators.
  • the method is largely carried out by the integral pump control of the heating circulation pump.
  • the heating pump determines the actual heat requirement in the heating system and provides the heating control of the burner with this information, for example, to adapt the flow temperature control.
  • the heating control then sets the flow temperature either only based on that determined by the pump as required or it combines the demand determined by the pump with the outside temperature signal.
  • the flow temperature is determined by the pump either through an external sensor or through an internal estimate.
  • the system resistance describes the losses of the pipes as well as the sum of the losses of all thermostatic valves. Since the losses in the pipes are constant, the position of the thermostatic valves can be determined directly from the system resistance.
  • the delivery flow Q and delivery head H are typically determined by the pump control using an internal estimation algorithm.
  • Figure 2 shows an example of the resulting course of this correlation value for the measured values determined in Figure 1.
  • the figure representation shows an almost constant course of the correlation value, with the exception of tolerable fluctuations.
  • This correlation value is proportional to the value by which the heating curve is set too steep. The heating control can therefore derive from the signal of the correlation value whether the heating curve is set too steep or too flat.
  • the thermostatic valves do not follow the flow temperature. This indicates that the heating curve is too flat. The heating curve must become steeper.
  • the constant correlation value means that there is no undersupply and the heating curve is not set too flat. If the amount of the correlation value is small, the heating curve is not too steep. In this case the heating runs optimally.
  • FIG. 3 shows the previously described control process again schematically.
  • the flow temperature and the system resistance are first determined.
  • the course of the correlation value is monitored over a certain period of time, in particular continuously. If this is approximately constant, the process goes to block 20, which determines the level of the correlation value. If the correlation value is above a specific limit value, the method continues with block 30.
  • the heating curve must be made steeper, which the pump communicates to the heating control via an interface. However, if the determined correlation value is low and below the limit value, the heating curve currently used is assessed as optimal and is not modified. The process returns to block 10.
  • the method moves to block 40.
  • a message is sent to the heating control system, according to which the heating curve must be made steeper in order to be able to cover the heat requirement in the building.

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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)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

L'invention concerne un procédé de surveillance et/ou de commande d'un système de chauffage, comprenant un réseau de conduites ayant une résistance de système variable et au moins une source de chaleur, qui alimente un milieu de chauffage avec une température de flux définie dans le réseau de conduites, et au moins une pompe de circulation pour faire circuler le milieu de chauffage à l'intérieur du réseau de conduites, les étapes de procédé consistant à déterminer le flux actuel et/ou la température de retour, à déterminer la résistance de système du réseau de conduites, et à calculer une valeur de corrélation entre le flux actuel et/ou la température de retour et la résistance de système actuelle.
PCT/EP2023/062219 2022-05-10 2023-05-09 Procédé de surveillance et/ou de commande d'un système de chauffage WO2023217752A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022001628.1A DE102022001628A1 (de) 2022-05-10 2022-05-10 Verfahren zur Überwachung und/oder Steuerung einer Heizungsanlage
DE102022001628.1 2022-05-10

Publications (1)

Publication Number Publication Date
WO2023217752A1 true WO2023217752A1 (fr) 2023-11-16

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PCT/EP2023/062219 WO2023217752A1 (fr) 2022-05-10 2023-05-09 Procédé de surveillance et/ou de commande d'un système de chauffage

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DE (1) DE102022001628A1 (fr)
WO (1) WO2023217752A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0730213A2 (fr) * 1995-03-02 1996-09-04 Hans-Georg Baunach Méthode et dispositif de régulation hydraulique optimisé de la température de départ
DE202012012915U1 (de) * 2012-09-24 2014-07-17 Huu-Thoi Le Heiz- und/oder Kühlanlage
US20190353399A1 (en) * 2018-05-15 2019-11-21 Gas Technology Institute Control apparatus and method for combination space and water heating
EP3936770A1 (fr) * 2020-07-07 2022-01-12 blossom-Ic Intelligent Controls GmbH & Co. KG Système de chauffage à équilibrage hydraulique adaptatif automatique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163987A1 (de) 2001-12-24 2003-07-10 Grundfos As Verfahren zum Steuern einer drehzahlregelbaren Heizungsumwälzpumpe
DE102008054043A1 (de) 2008-10-30 2010-05-12 Techem Energy Services Gmbh Verfahren und Vorrichtung zur wärmebedarfsgeführten Adaption der Vorlauftemperatur einer Heizungsanlage
EP2863134B1 (fr) 2013-10-15 2018-06-06 Grundfos Holding A/S Procédé d'adaptation d'une courbe de chauffe
DE102016104667A1 (de) 2016-03-14 2017-09-14 Techem Energy Services Gmbh Verfahren und Steuereinrichtung zur Erhöhung des Nutzungsgrads eines Wärmeerzeugers in einer Heizungsanlage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0730213A2 (fr) * 1995-03-02 1996-09-04 Hans-Georg Baunach Méthode et dispositif de régulation hydraulique optimisé de la température de départ
DE202012012915U1 (de) * 2012-09-24 2014-07-17 Huu-Thoi Le Heiz- und/oder Kühlanlage
US20190353399A1 (en) * 2018-05-15 2019-11-21 Gas Technology Institute Control apparatus and method for combination space and water heating
EP3936770A1 (fr) * 2020-07-07 2022-01-12 blossom-Ic Intelligent Controls GmbH & Co. KG Système de chauffage à équilibrage hydraulique adaptatif automatique

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