EP3431888B1 - Method for hydraulic balancing of a heating and/or cooling system - Google Patents
Method for hydraulic balancing of a heating and/or cooling system Download PDFInfo
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- EP3431888B1 EP3431888B1 EP18181083.9A EP18181083A EP3431888B1 EP 3431888 B1 EP3431888 B1 EP 3431888B1 EP 18181083 A EP18181083 A EP 18181083A EP 3431888 B1 EP3431888 B1 EP 3431888B1
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- Prior art keywords
- heating
- opening
- cooling
- cooling circuit
- flow rate
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- 238000010438 heat treatment Methods 0.000 title claims description 123
- 238000001816 cooling Methods 0.000 title claims description 94
- 238000000034 method Methods 0.000 title claims description 49
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 description 7
- 241001136792 Alle Species 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000013439 planning Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013440 design planning Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 240000003517 Elaeocarpus dentatus Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
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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
-
- 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
Definitions
- the invention relates to a method for performing hydraulic balancing of a heating and / or cooling system operated by means of a temperature control medium for, for example, a building, in particular a surface heating and / or cooling system.
- the energy-efficient operation of a water-operated heating system that meets the needs of comfort requires - in addition to the needs-based temperature of the heating medium - measures to create defined hydraulic conditions in the system and the use of a room temperature control system.
- the hydraulic balancing of surface heating or cooling systems is a work step that is part of the professional commissioning of the system.
- the hydraulic balancing is intended to ensure that each circuit of the system is supplied with the heating medium quantities determined in the design planning, thus creating the prerequisite for the downstream room temperature control to work optimally.
- thermoelectric 2-point actuators that operate a valve on the heating circuit distributor. These actuators occupy 2 positions: fully open or fully closed.
- drives are used that are moved into a defined position either via a control signal or by targeted activation of the electric motor (continuous drive) in order to influence the flow through the heating circuit.
- This procedure also brings improvements in terms of comfort and energy consumption in systems in which the hydraulic balancing has not been carried out properly or in which there have been changes in the design of the system that deviate from the original plan.
- WO 2008/055498 A1 describes a heating / cooling system in which the thermostatic control of the return temperature is used to effect a hydraulic balance between heating circuits of different lengths.
- DE 10 2004 017 593 B3 describes a heating / cooling system in which a sensor is provided in each circuit to be calibrated via a valve, which acts as an input to a controller. The controller determines the correct position of the valves in such a way that hydraulic balancing is guaranteed.
- DE 10 2004 017 593 B3 does not describe the procedure required for this, only the basic structure of the system.
- EP 2 894 408 A1 or. DE 10 2012 015 892 A1 describes a process for the temperature control of rooms in a building, in which the valve drives of the heating circuit distributors (in 3-point design, with self-locking gear) are brought into a defined position by successive actuation via a controller.
- US 2014/150883 A1 describes a method for hydraulic balancing of a heating system that has heating circuits with control valves. For the hydraulic balance, a heating circuit is selected as the heating circuit to be examined and the flow rate of the heating medium is determined. Several different valve positions can be saved for different flow rates.
- the flow rate can only be influenced statically by a valve and thus by the heating circuit and thus the hydraulic balancing of the circuits with one another, i.e. by setting the valves according to the values determined in the design Values for the design case. If this setting is not made exactly or not at all, or if changes occur after the commissioning of the heating system compared to the assumptions made in the design planning, operating conditions result that result in partial oversupply and partial undersupply of individual heating circuits and rooms. This can also happen in operating states outside of the design case.
- Deficiencies in the hydraulic coordination of a system can manifest themselves in a considerable loss of comfort for the user.
- the temperature of the heating medium is often increased to such an extent that the possibly undersupplied rooms are better supplied, but this results in an oversupply of other rooms and thus an increased room temperature and, as a result, increased energy consumption.
- the object of the invention is to create a method for the hydraulic balancing of a heating and / or cooling system that can be carried out reliably, specifically also in the regular operation of the heating and / or cooling system.
- an error message is output and the method is terminated if, when performing step h), at least the valve of one of the other heating and / or cooling circuits not to be examined is to be closed to such an extent that it reaches or falls below the minimum degree of opening according to its initial value or its newly determined minimum degree of opening.
- the method according to the invention can be used with advantage in the control or normal operation of the heating and / or cooling system by analyzing the room temperature curves during normal operation of the heating and / or cooling system when individual rooms with too little temperature control medium and other rooms are recognized are supplied with too much temperature control medium, in which case in a first step the minimum opening degrees of the valves that control the heating and / or cooling circuits for the rooms with insufficient supply of the temperature control medium are increased and in a second step the maximum opening degrees of the valves that control the heating and / or cooling circuits for the rooms with an excessively high supply of the temperature control medium can be reduced.
- the procedure according to the invention described below can be used in systems in which the hydraulic balancing is carried out using method 1 (throttling of the Flow through circuits), as well as in systems in which, apart from the valves used for room temperature control, which determine the flow rate of the heating circuits, there are no other control elements that determine the flow rate.
- the method is based on the basic procedure of iteratively determining the minimum necessary degree of opening for each circuit at maximum load of all other circuits as well as the maximum permissible degree of opening of each circuit, at which all other circuits can still be supplied. Once these results have been found, they are corrected and thus optimized by the requirements placed on the individual circuits during regular operation.
- the adjustment path of the valve drives extends from a minimum value (valve closed), referred to as "Aclosed”, to a maximum value, referred to as "Aopen".
Description
Die Erfindung betrifft ein Verfahren zur Durchführung eines hydraulischen Abgleichs eines mittels eines Temperiermediums betriebenen Heizungs- und/oder Kühlungssystems für z.B. ein Gebäude, insbesondere eines Flächenheizungs- und/oder -kühlungssystems.The invention relates to a method for performing hydraulic balancing of a heating and / or cooling system operated by means of a temperature control medium for, for example, a building, in particular a surface heating and / or cooling system.
Der energieeffiziente und den Komfortbedürfnissen gerecht werdende Betrieb einer wasserbetriebenen Heizungsanlage erfordert - neben der bedarfsgerechten Temperatur des Heizmittels - Maßnahmen, um definierte hydraulische Verhältnisse in der Anlage zu schaffen, und den Einsatz eines Raumtemperaturregelsystems.The energy-efficient operation of a water-operated heating system that meets the needs of comfort requires - in addition to the needs-based temperature of the heating medium - measures to create defined hydraulic conditions in the system and the use of a room temperature control system.
Der hydraulische Abgleich bei Flächenheizungs- oder Kühlungssystemen (im Folgenden wird nur von Heizsystemen gesprochen, die Überlegungen sind aber auf Kühlsysteme übertragbar) ist ein Arbeitsschritt, der zur fachgerechten Inbetriebsetzung der Anlage gehört. Durch den hydraulischen Abgleich soll gewährleistet werden, dass jeder Kreis der Anlage mit den in der Auslegungsplanung ermittelten Heizmittelmengen versorgt wird und damit die Voraussetzung geschaffen wird, dass die nachgeschaltete Raumtemperaturregelung optimal arbeitet.The hydraulic balancing of surface heating or cooling systems (in the following only heating systems are spoken of, the considerations can, however, be transferred to cooling systems) is a work step that is part of the professional commissioning of the system. The hydraulic balancing is intended to ensure that each circuit of the system is supplied with the heating medium quantities determined in the design planning, thus creating the prerequisite for the downstream room temperature control to work optimally.
Die Regelung der Raumtemperatur geschieht in den meisten Fällen über thermoelektrische 2-Punkt-Antriebe, die ein Ventil am Heizkreisverteiler betätigen. Diese Antriebe nehmen 2 Positionen ein: vollständig geöffnet oder vollständig geschlossen.In most cases, the room temperature is regulated using thermoelectric 2-point actuators that operate a valve on the heating circuit distributor. These actuators occupy 2 positions: fully open or fully closed.
Alternativ zu den 2-Punkt-Antrieben werden Antriebe verwendet, die entweder über ein Steuersignal oder durch gezieltes Ansteuern des Elektromotors in eine definierte Position gefahren werden (stetiger Antrieb), um den Durchfluss durch den Heizkreis so zu beeinflussen.As an alternative to the 2-point drives, drives are used that are moved into a defined position either via a control signal or by targeted activation of the electric motor (continuous drive) in order to influence the flow through the heating circuit.
Für die Durchführung des hydraulischen Abgleichs am Heizkreisverteiler stehen folgende Möglichkeiten zur Verfügung:
- 1) Einstellen eines Ventils im Vorlauf- oder Rücklauf des Heizkreises, um die Heizmittelmenge durch diesen Kreis bei vollständig geöffnetem Ventil zu begrenzen (Abdrosseln, statischer Abgleich).
- 2) Verwenden von Durchflussreglern, die den Heizmittelstrom durch den Heizkreis auf den eingestellten Wert begrenzen (dynamischer Abgleich)
Die unter 1) beschriebene Vorgehensweise bringt nur im Auslegungsfall ein optimales Ergebnis. Wenn sich die Heizmediumströme in der Anlage im Teillastbetrieb verändern, ergeben sich andere Druckverluste und damit an dem fest eingestellten Ventil ein anderer als der gewollte Durchfluss.
Bei der unter 2) beschriebenen Vorgehensweise wird innerhalb bestimmter Grenzen der gewünschte Durchfluss konstant gehalten, weshalb diese Vorgehensweise also auch außerhalb des Auslegungsfalls gute Ergebnisse erbringt. - 3) Eine dritte im Stand der Technik bekannte Möglichkeit wird nachfolgend beschrieben:
Bei bestimmten Regelsystemen werden neben der Raumtemperatur auch die Vorlauf- und Rücklauftemperatur der Heizkreise berücksichtigt. Weicht die Rücklauftemperatur von dem vorgegebenen Wert ab, wird entweder die Ventilstellung des von der Raumtemperaturregelung betätigten Ventils verändert (hierzu ist ein stetiger Antrieb notwendig), oder die Durchflussrate über die Zeit so variiert, dass sich im Mittel die gewünschte Rücklauftemperatur ergibt. In diesem Fall wird also ein automatischer hydraulischer Abgleich angestrebt.
- 1) Setting a valve in the flow or return of the heating circuit in order to limit the amount of heating medium through this circuit when the valve is fully open (throttling, static balancing).
- 2) Use of flow regulators that limit the heating medium flow through the heating circuit to the set value (dynamic adjustment)
The procedure described under 1) only provides an optimal result in the design case. If the heating medium flows in the system change in partial load operation, there are different pressure losses and thus a different flow rate at the fixed valve than the intended flow.
In the procedure described under 2), the desired flow rate is kept constant within certain limits, which is why this procedure also produces good results outside of the design case. - 3) A third possibility known in the prior art is described below:
With certain control systems, in addition to the room temperature, the flow and return temperatures of the heating circuits are also taken into account. If the return temperature deviates from the specified value, either the valve position of the valve operated by the room temperature control is changed (this requires a continuous drive), or the flow rate is varied over time so that the desired return temperature is obtained on average. In this case, an automatic hydraulic balance is sought.
Diese Vorgehensweise bringt also auch bei Anlagen, bei denen der hydraulische Abgleich nicht fachgerecht ausgeführt wurde oder sich in der Ausführung der Anlage Änderungen ergeben haben, die von der ursprünglichen Planung abweichen, Verbesserungen hinsichtlich Komfort und Energieverbrauch.This procedure also brings improvements in terms of comfort and energy consumption in systems in which the hydraulic balancing has not been carried out properly or in which there have been changes in the design of the system that deviate from the original plan.
In
In
In
Weitere Verfahren zur Durchführung eines hydraulischen Abgleichs sind in der
Die zuvor genannten Vorgehensweisen sind mit den folgenden Problemen verbunden.The above procedures involve the following problems.
Bei Verwendung der 2-Punkt-Antriebe und der unter 1) beschriebenen Vorgehensweise kann eine Beeinflussung der Durchflussrate durch ein Ventil und damit durch den Heizkreis und somit der hydraulische Abgleich der Kreise untereinander nur statisch, also durch Einstellung der Ventile nach den in der Auslegung ermittelten Werten für den Auslegungsfall erfolgen. Erfolgt diese Einstellung nicht exakt oder gar nicht oder stellen sich nach der Inbetriebsetzung der Heizungsanlage Veränderungen gegenüber den in der Auslegungsplanung getroffenen Annahmen ein, so ergeben sich Betriebszustände, die eine teilweise Überversorgung und eine teilweise Unterversorgung einzelner Heizkreise und Räume zur Folge haben. Das kann auch in Betriebszuständen außerhalb des Auslegungsfalls geschehen. Der Einfluss von Fehlern, die bei der Einstellung des hydraulischen Abgleichs gemacht werden, wird durch die übliche Verwendung von 2-Punkt-Antrieben noch verschärft, da durch das komplette Öffnen eines Verteilerabgangs ein stärkerer hydraulischer Einfluss auf die anderen Heizkreise ausgeübt wird, als wenn ein Kreis nur zum Teil geöffnet wird. Die Verwendung von Durchflussreglern, wie bei Methode 2 erforderlich, ist eine Lösung, die auch außerhalb des Auslegungsfalls funktioniert. Allerdings kann diese Lösung nicht auf Veränderungen in der Anlage gegenüber dem ursprünglichen Planungszustand reagieren. Die oben unter 3) beschriebene Methode erfordert die Verwendung von Antrieben, die einen beliebigen Hub einnehmen können. Im Regelfall handelt es sich hierbei um motorisch betriebene 3-Punkt-Antriebe oder um Antriebe, die über ein stetiges Regelsignal in eine bestimmte Position gefahren werden können.When using the 2-point drives and the procedure described under 1), the flow rate can only be influenced statically by a valve and thus by the heating circuit and thus the hydraulic balancing of the circuits with one another, i.e. by setting the valves according to the values determined in the design Values for the design case. If this setting is not made exactly or not at all, or if changes occur after the commissioning of the heating system compared to the assumptions made in the design planning, operating conditions result that result in partial oversupply and partial undersupply of individual heating circuits and rooms. This can also happen in operating states outside of the design case. The influence of errors that are made when setting the hydraulic balancing is exacerbated by the usual use of 2-point drives, since the complete opening of a distributor outlet exerts a greater hydraulic influence on the other heating circuits than if a Circle is only partially opened. Using flow regulators, as required in Method 2, is a solution that works outside of the design case as well. However, this solution cannot react to changes in the system compared to the original planning status. The method described above under 3) requires the use of drives that can adopt any stroke. As a rule, these are motorized 3-point drives or drives that can be moved to a specific position via a continuous control signal.
Generell wäre auch bei Methode 1 der Einsatz von stetig arbeitenden Antrieben zur Ansteuerung der Ventile vorzuziehen, da dadurch sowohl eine feinfühligere Regelung der Raumtemperatur möglich wäre, als auch durch das stufenlose Ansteuern der Ventile die hydraulische Situation - zumindest über bestimmte Zeitabschnitte - verbessert wird.In general, the use of continuously operating drives to control the valves would also be preferable for method 1, as this would enable both more sensitive control of the room temperature and the stepless control of the valves to improve the hydraulic situation - at least over certain periods of time.
Jede der bekannten Methoden setzt voraus, dass Planungsunterlagen vorliegen, aus denen die hydraulischen Einstellwerte hervorgehen. Das ist jedoch bei Bestandsanlagen nicht immer der Fall. Hinzu kommt, dass in der Praxis der Abgleich nicht sorgfältig genug erfolgt, oder sogar ganz unterbleibt, so dass die hydraulische Abstimmung der Anlage mangelhaft ist.Each of the known methods assumes that planning documents are available from which the hydraulic setting values can be derived. However, this is not always the case with existing systems. In addition, the comparison is not carried out carefully enough in practice, or is even omitted entirely, so that the hydraulic coordination of the system is inadequate.
Mängel in der hydraulischen Abstimmung einer Anlage können sich für den Nutzer in einem erheblichen Komfortverlust äußern. Um diesem eventuell auftretenden Komfortverlust vorzubeugen bzw. um diesen auszugleichen wird häufig die Temperatur des Heizmediums soweit erhöht, dass zwar die eventuell unterversorgten Räume besser versorgt werden, aber sich dadurch eine Überversorgung anderer Räume und damit eine erhöhte Raumtemperatur und in Folge ein erhöhter Energieverbrauch einstellt.Deficiencies in the hydraulic coordination of a system can manifest themselves in a considerable loss of comfort for the user. In order to prevent or compensate for this loss of comfort that may occur, the temperature of the heating medium is often increased to such an extent that the possibly undersupplied rooms are better supplied, but this results in an oversupply of other rooms and thus an increased room temperature and, as a result, increased energy consumption.
Aufgabe der Erfindung ist es, ein Verfahren für den hydraulischen Abgleich eines Heizungs- und/oder Kühlungssystems zu schaffen, das sich zuverlässig durchführen lässt, und zwar auch im Regelbetrieb des Heizungs- und/oder Kühlungssystems.The object of the invention is to create a method for the hydraulic balancing of a heating and / or cooling system that can be carried out reliably, specifically also in the regular operation of the heating and / or cooling system.
Zur Lösung dieser Aufgabe wird mit der Erfindung ein Verfahren zur Durchführung eines hydraulischen Abgleichs eines mittels eines Temperiermediums betriebenen Heizungs- und/oder Kühlungssystems für z.B. ein Gebäude, insbesondere eines Flächenheizungs- und/oder -kühlungssystems, vorgeschlagen, wobei bei dem Verfahren
- das Heizungs- und/oder Kühlungssystem eine Vorlaufleitung, eine Rücklaufleitung und mehrere jeweils mit der Vorlaufleitung und der Rücklaufleitung verbundene Heiz- und/oder Kühlkreise aufweist,
- jeder Heiz- und/oder Kühlkreis ein motorisch betätigbares Ventil aufweist, dessen Öffnungsgrad zwischen vollständig geschlossen und vollständig offen kontinuierlich oder quasi-kontinuierlich verstellbar ist,
- während solcher Phasen des Betriebs des Heizungs- und/oder Kühlungssystems, in denen sämtliche Heiz- und/oder Kühlkreise mit Temperiermedium zu versorgen sind, gilt, dass durch jeden Heiz- und/oder oder Kühlkreis Temperiermedium mit einer Durchflussrate fließt, die zwischen einer Minimaldurchflussrate und einer Maximaldurchflussrate liegt, und
- der Minimaldurchflussrate ein Minimalöffnungsgrad und der Maximaldurchflussrate ein Maximalöffnungsgrad des Ventils des betreffenden Heiz- und/oder Kühlkreises zugeordnet ist,
wobei bei dem Verfahren- a) für das Ventil jedes Heiz- und/oder Kühlkreises ein Anfangswert für den Minimalöffnungsgrad und ein Anfangswert für den Maximalöffnungsgrad vorgegeben wird,
- b) ein erster der Heiz- und/oder Kühlkreise als zu untersuchender Heiz- und/oder Kühlkreis ausgewählt wird,
- c) bis auf das Ventil des zu untersuchenden Heiz- und/oder Kühlkreises an den Ventilen der nicht zu untersuchenden anderen Heiz- und/oder Kühlkreise der jeweilige Anfangswert für den Maximalöffnungsgrad oder ein zu diesem Zeitpunkt bereits neu ermittelter Maximalöffnungsgrad eingestellt wird,
- d) an dem Ventil des zu untersuchenden Heiz- und/oder Kühlkreises der Anfangswert für den Minimalöffnungsgrad eingestellt wird,
- e) die Durchflussrate des Temperiermediums in dem zu untersuchenden Heiz- und/oder Kühlkreis ermittelt wird,
- f) überprüft wird, ob die Durchflussrate in dem zu untersuchenden Heiz- und/oder Kühlkreis gleich der Minimaldurchflussrate für diesen Heiz- und/oder Kühlkreis ist,
- g) dann, wenn die ermittelte Durchflussrate in dem zu untersuchenden Heiz- und/oder Kühlkreis kleiner als die Minimaldurchflussrate für diesen Heiz- und/oder Kühlkreis ist, der Öffnungsgrad des Ventils des zu untersuchenden Heiz- und/oder Kühlkreises vergrößert wird, bis die ermittelte Durchflussrate für den zu untersuchenden Heiz- und/oder Kühlkreis gleich der Minimaldurchflussrate für diesen Heiz- und/oder Kühlkreis ist, und dieser Öffnungsgrad des Ventils als neuer Minimalöffnungsgrad des Ventils für den zu untersuchenden Heiz- und/oder Kühlkreis abgespeichert wird,
- h) oder dann, wenn die ermittelte Durchflussrate für den zu untersuchenden Heiz- und/oder Kühlkreis kleiner als die Minimaldurchflussrate für diesen Heiz- und/oder Kühlkreis ist und sich in dem zu untersuchenden Heiz- und/oder Kühlkreis auch bei dem Maximalöffnungsgrad des Ventils für diesen Heiz- und/oder Kühlkreis noch nicht die Minimaldurchflussrate für diesen Heiz- und/oder Kühlkreis einstellt, die Öffnungsgrade der Ventile der nicht zu untersuchenden anderen Heiz- und/oder Kühlkreise schrittweise solange verringert werden, bis sich in dem zu untersuchenden Heiz- und/oder Kühlkreis die Mindestdurchflussrate einstellt, und die Öffnungsgrade der Ventile der nicht zu untersuchenden anderen Heiz- und/oder Kühlkreise als deren jeweilige neue Maximalöffnungsgrade abgespeichert werden (wobei insbesondere die Öffnungsgrade sämtlicher Ventile außer dem gerade zu untersuchenden Ventil gleichzeitig verringert werden),
- i) ein nächster der Heiz- und/oder Kühlkreise als zu untersuchender Heiz- und/oder Kühlkreis ausgewählt wird und das Verfahren gemäß den Schritten c) bis h) durchgeführt wird,
- j) die Schritte b) bis i) für sämtliche Heiz- und/oder Kühlkreise durchgeführt werden, wobei danach für das Ventil jedes Heiz- und/oder Kühlkreises ein Minimalöffnungsgrad und ein Maximalöffnungsgrad für die Einhaltung des hydraulischen Abgleichs während des Betriebs des Heizungs- und/oder Kühlungssystems ermittelt ist.
- the heating and / or cooling system has a flow line, a return line and several heating and / or cooling circuits each connected to the flow line and the return line,
- each heating and / or cooling circuit has a motor-operated valve whose degree of opening can be continuously or quasi-continuously adjustable between fully closed and fully open,
- During those phases of the operation of the heating and / or cooling system in which all heating and / or cooling circuits are to be supplied with temperature control medium, the rule is that temperature control medium flows through each heating and / or cooling circuit at a flow rate between a minimum flow rate and a maximum flow rate, and
- the minimum flow rate is assigned a minimum degree of opening and the maximum flow rate is assigned a maximum degree of opening of the valve of the relevant heating and / or cooling circuit,
being in the process- a) an initial value for the minimum degree of opening and an initial value for the maximum degree of opening are specified for the valve of each heating and / or cooling circuit,
- b) a first of the heating and / or cooling circuits is selected as the heating and / or cooling circuit to be examined,
- c) with the exception of the valve of the heating and / or cooling circuit to be examined, the respective initial value for the maximum degree of opening or a maximum degree of opening that has already been newly determined at this point is set on the valves of the other heating and / or cooling circuits not to be examined,
- d) the initial value for the minimum degree of opening is set on the valve of the heating and / or cooling circuit to be examined,
- e) the flow rate of the temperature control medium in the heating and / or cooling circuit to be examined is determined,
- f) it is checked whether the flow rate in the heating and / or cooling circuit to be examined is equal to the minimum flow rate for this heating and / or cooling circuit,
- g) when the determined flow rate in the heating and / or cooling circuit to be examined is less than the minimum flow rate for this heating and / or cooling circuit, the degree of opening of the valve of the heating and / or cooling circuit to be examined is increased until the the determined flow rate for the heating and / or cooling circuit to be examined is equal to the minimum flow rate for this heating and / or cooling circuit, and this degree of opening of the valve is saved as the new minimum degree of opening of the valve for the heating and / or cooling circuit to be examined,
- h) or when the determined flow rate for the heating and / or cooling circuit to be examined is less than the minimum flow rate for this heating and / or cooling circuit and is also in the heating and / or cooling circuit to be examined with the maximum degree of opening of the valve has not yet set the minimum flow rate for this heating and / or cooling circuit for this heating and / or cooling circuit, the degrees of opening of the valves of the other heating and / or cooling circuits not to be examined are gradually reduced until the heating and / or cooling circuit to be examined and / or cooling circuit sets the minimum flow rate, and the degrees of opening of the valves of the other heating and / or cooling circuits not to be examined are stored as their respective new maximum degrees of opening (in particular the degrees of opening of all valves except for the valve to be examined are simultaneously reduced),
- i) a next one of the heating and / or cooling circuits is selected as the heating and / or cooling circuit to be examined and the method according to steps c) to h) is carried out,
- j) steps b) to i) are carried out for all heating and / or cooling circuits, after which a minimum degree of opening and a maximum degree of opening for the valve of each heating and / or cooling circuit for maintaining the hydraulic balance during operation of the heating and cooling circuit / or cooling system is determined.
Gemäß dem erfindungsgemäßen Verfahren wird also zusammengefasst sinngemäß wie folgt vorgegangen:
- Erkennen der Minimalöffnung bei geringer Last des Systems
- Speichern dieser Öffnungsgrade
- Erkennen, ob diese für jeden Kreis gefundene Minimalöffnung bei maximaler Last des Systems noch ausreicht
- Ggf. korrigieren der Minimalöffnung des einen Kreises oder Verringern der Maximalöffnung aller anderen Kreise
- Korrigieren der gefundenen Minimal- und Maximalwerte anhand der Ergebnisse der Raumtemperaturregelung.
- Detection of the minimum opening when the system is under low load
- Save these degrees of opening
- Recognize whether this minimum opening found for each circuit is still sufficient when the system is under maximum load
- If necessary, correct the minimum opening of one circle or reduce the maximum opening of all other circles
- Correcting the minimum and maximum values found based on the results of the room temperature control.
In vorteilhafter Weiterbildung der Erfindung kann vorgesehen sein, dass eine Fehlermeldung ausgegeben und das Verfahren abgebrochen wird, wenn bei der Durchführung des Schritts h) zumindest das Ventil eines der nicht zu untersuchenden anderen Heiz- und/oder Kühlkreise so weit zu schließen ist, dass es den Minimalöffnungsgrad gemäß seines Anfangswerts oder seinen bereits neu ermittelten Minimalöffnungsgrad erreicht oder unterschreitet.In an advantageous development of the invention, it can be provided that an error message is output and the method is terminated if, when performing step h), at least the valve of one of the other heating and / or cooling circuits not to be examined is to be closed to such an extent that it reaches or falls below the minimum degree of opening according to its initial value or its newly determined minimum degree of opening.
Schließlich lässt sich das erfindungsgemäße Verfahren mit Vorteil im Regel- bzw. Normalbetrieb des Heizungs- und/oder Kühlungssystems einsetzen, indem im Regelbetrieb des Heizungs- und/oder Kühlungssystems durch Analyse der Raumtemperaturverläufe erkannt wird, wenn einzelne Räume mit zu wenig Temperiermedium und andere Räume mit zu viel Temperiermedium versorgt werden, wobei in diesem Fall in einem ersten Schritt die Minimalöffnungsgrade der Ventile, die die Heiz- und/oder Kühlkreise für die Räume mit einer zu geringen Versorgung durch das Temperiermedium steuern, erhöht werden und in einem zweiten Schritt die Maximalöffnungsgrade der Ventile, die die Heiz- und/oder Kühlkreise für die Räume mit einer zu hohen Versorgung durch das Temperiermedium steuern, verringert werden.Finally, the method according to the invention can be used with advantage in the control or normal operation of the heating and / or cooling system by analyzing the room temperature curves during normal operation of the heating and / or cooling system when individual rooms with too little temperature control medium and other rooms are recognized are supplied with too much temperature control medium, in which case in a first step the minimum opening degrees of the valves that control the heating and / or cooling circuits for the rooms with insufficient supply of the temperature control medium are increased and in a second step the maximum opening degrees of the valves that control the heating and / or cooling circuits for the rooms with an excessively high supply of the temperature control medium can be reduced.
Die im Folgenden beschriebene erfindungsgemäße Vorgehensweise kann bei Anlagen, bei denen der hydraulische Abgleich durch Anwendung des Verfahrens 1 (Abdrosseln des Durchflusses von Kreisen) realisiert wird, als auch bei Anlagen angewendet werden, bei denen außer den für die Raumtemperaturregelung verwendeten Ventilen, die den Durchfluss der Heizkreise bestimmen, keine weiteren den Durchfluss bestimmenden Stellorgane vorhanden sind.The procedure according to the invention described below can be used in systems in which the hydraulic balancing is carried out using method 1 (throttling of the Flow through circuits), as well as in systems in which, apart from the valves used for room temperature control, which determine the flow rate of the heating circuits, there are no other control elements that determine the flow rate.
Für die Anwendung des erfindungsgemäßen Verfahrens ist es notwendig, Antriebe zu verwenden, deren Verstellweg stetig einstellbar istFor the application of the method according to the invention, it is necessary to use drives whose adjustment path is continuously adjustable
Für die Anwendung des Verfahrens ist es außerdem notwendig, für jeden Kreis getrennt einen Mindestdurchfluss durch diesen Kreis zu erkennen. Die Erkennung dieses Mindestdurchflusses kann durch verschiedene Methoden geschehen:
- es wird in jedem Kreis ein Sensor eingebracht, der diesen Mindestdurchfluss in diesem Kreis detektiert;
- dieser Sensor kann ein Durchflussmengenmesser, ein Durchflussschalter oder ein Temperatursensor sein;
- durch eine Veränderung des Summenstroms eines Durchflussmengenmessers oder eines anderen geeigneten Sensors im zentralen Vorlauf- oder Rücklauf des Verteilers wird das Hinzukommen oder Fehlen des Heizmedium-Stroms durch einen einzelnen Kreis detektiert
- a sensor is installed in each circuit that detects this minimum flow rate in this circuit;
- this sensor can be a flow meter, a flow switch or a temperature sensor;
- By changing the total flow of a flow meter or another suitable sensor in the central flow or return of the distributor, the addition or absence of the heating medium flow through a single circuit is detected
Das Verfahren basiert auf der grundsätzlichen Vorgehensweise, iterativ für jeden Kreis den minimalen notwendigen Öffnungsgrad bei maximaler Last aller anderer Kreise sowie den maximal zulässigen Öffnungsgrad eines jeden Kreises, bei dem alle anderen Kreise noch versorgt werden können, zu ermitteln. Diese einmal gefundenen Ergebnisse werden durch die im Regelbetrieb sich einstellenden Anforderungen an die einzelnen Kreise korrigiert und damit optimiert.The method is based on the basic procedure of iteratively determining the minimum necessary degree of opening for each circuit at maximum load of all other circuits as well as the maximum permissible degree of opening of each circuit, at which all other circuits can still be supplied. Once these results have been found, they are corrected and thus optimized by the requirements placed on the individual circuits during regular operation.
Die Vorgehensweise bei den unten beschriebenen Verfahrensschritten unterscheidet sich im Detail nach der Positionierung der verwendeten Sensoren:The procedure for the process steps described below differs in detail according to the positioning of the sensors used:
Bei zentraler Anordnung eines Sensors kann nur die Änderung des gesamten Durchflusses erkannt werden. Deshalb muss in diesem Fall der zu testende Kreis immer zuerst geschlossen werden, bevor er bis zu dem Punkt geöffnet wird, an dem der Mindestdurchfluss erkannt wird.With a central arrangement of a sensor, only the change in the total flow can be detected. Therefore, in this case, the circuit to be tested must always be closed first before it is opened to the point at which the minimum flow is detected.
Der Verstellweg der Ventilantriebe (Öffnungsgrad) erstreckt sich von einem minimalen Wert (Ventil geschlossen), bezeichnet als "Aclosed", bis zu einem maximalen Wert, bezeichnet als "Aopen".The adjustment path of the valve drives (degree of opening) extends from a minimum value (valve closed), referred to as "Aclosed", to a maximum value, referred to as "Aopen".
Das untenstehende Verfahren bezieht sich auf einen Verteiler mit m Abgängen und m Antrieben. Diese m Abgänge sind einer Anzahl von Räumen zugeordnet, wobei mehrere Abgänge (Kreise) einem Raum zugeordnet sein können.
- 1) In einem initialen Schritt, der ohne Eingriff des Nutzers nur einmal durchlaufen wird, der aber durch den Nutzer erneut aufgerufen werden kann (Reset-Funktion), werden Anfangswerte für den maximalen Öffnungsgrad der Antriebe (A max(n), n=1...m) und damit der Ventile, die den Durchfluss regulieren, gesetzt. Ebenso wird der für den minimalen Öffnungsgrad der Antriebe notwendige Wert (A min(n), n=1...m) gesetzt. Im initialen Schritt werden die Werte für alle Antriebe auf den gleichen Wert gesetzt, solange keine Vorgabewerte existieren. In eine Variante des Verfahrens können individuelle Vorgabewerte, die z.B. aus den Planungswerten hervorgehen, gesetzt werden.
- 2) In einem insbesondere regelmäßig wiederkehrenden ersten Kalibrierungsschritt wird der Öffnungsgrad eines jeden Antriebs von der geschlossenen Stellung ausgehend solange gesteigert, bis der Wert A min(n) erreicht ist, und darüber hinaus so lange bis der Grenzwert des Durchflusses in jedem Kreis erkannt wird. Dieser Öffnungsgrad wird für jeden Antrieb als Untergrenze A min (n), n=1...m des Verstellbereichs abgespeichert.
- 3) In einem insbesondere regelmäßig wiederkehrenden und vorzugsweise mehrfach vorzunehmenden zweiten Kalibrierungsschritt werden nun alle Antriebe mit Ausnahme des n-ten Antriebs, beginnend mit n=1, gleichzeitig bis zu dem Öffnungsgrad A max(n) geöffnet, wobei diese Öffnungsgrade entweder den in Schritt 1 vorbestimmten Werten, bei einem zweiten Aufruf den in dem weiter unten beschriebenen Schritt 4 ermittelten Werten oder bei einem späteren erneuten Aufruf dieses Kalibrierungsschritts den in dem weiter unten beschriebenen Verfahrensschritt 6 für jeden Heizkreis ermittelten optimierten Öffnungsgraden A max(n) entsprechen.
Stellt sich nach Öffnen aller Antriebe außer dem n-ten Antrieb bis zu den genannten Werten A max(n) die Situation ein, dass an dem n-ten Kreis der Schwellwert für den Mindestdurchfluss nicht mehr erreicht wird, so wird in einem ersten Schritt das Ventil des n-ten Kreises so weit geöffnet, dass dieser Schwellwert wieder erreicht wird. Der Wert A min(n) wird mit diesem Wert neu besetzt.
Sollte sich die Mindest-Durchflussrate auch bis zum vollständigen Öffnen des n-ten Antriebs (Position "Aopen") nicht einstellen, also der Durchfluss in dem n-ten Kreis weiterhin unterhalb des Schwellwerts für den Mindestdurchfluss liegen, so werden die Antriebe aller anderen Ventile solange schrittweise geschlossen, bis der Durchfluss in dem n-ten Heizkreis wieder den Schwellwert für den Mindestdurchfluss erreicht. Die Werte A max(n) werden abgespeichert. Zusätzlich wird die Bedingung "Maximalwert erreicht" als erfüllt markiert.
Sollten dabei der Antrieb für zumindest einen Heizkreis soweit geschlossen werden müssen, dass für diesen Heizkreis der Wert A min(n) erreicht wird, ist eine weitere Kalibrierung nicht mehr sinnvoll und der Vorgang wird mit der Ausgabe einer Fehlermeldung beendet.
Nach Abschluss des Vorgangs wird der Zähler n um den Wert 1 erhöht, also der nächste Kreis ausgewählt, und Schritt 3 durchgeführt sowie diese Vorgehensweise so lange wiederholt, bis alle Antriebe behandelt wurden.
Nach Ablauf dieses Vorgangs ist für jeden Ventilantrieb ein Maximalwert des Öffnungsgrades (A max(n), n=1...m) bekannt, bei dem die Versorgung aller anderen Kreise gewährleistet wird. Für jeden Ventilantrieb ist außerdem ein Minimalwert (A min(n), n=1..m) bekannt, der nicht unterschritten werden darf, wenn alle anderen Antriebe bis zu dem ermittelten Maximalwert geöffnet sind. - 4) Der Vorgang von Schritt 3 kann nun wiederholt werden, wobei im nächsten Durchlauf der noch zur Verfügung stehende Verstellbereich der Antriebe bis zum Wert "Aopen" (maximale Öffnung) ausgeschöpft wird. Diese Wiederholung des Optimierschrittes unterbleibt, wenn die Bedingung "Maximalwert erreicht" erfüllt ist oder die Anlage bereits im Regelbetrieb war.
- 5) Nach Abschluss der iterativen Optimierungsschritte 3 und 4 stehen für jeden der Ventilantriebe ein maximaler Öffnungsgrad (A max(n), n=1...m), der nicht überschritten werden darf, um in jedem anderen Kreis einen Minimalwert des Durchflusses zu gewährleisten, sowie für jeden Kreis der minimale Öffnungsgrad des Ventilantriebs (A min(n), n=1..m) bei maximalem Öffnungsgrad aller anderen Ventilantriebe fest.
- 6) Im folgenden Regelbetrieb der Anlage - dem Ausregeln der Raumtemperaturen - wird sich mit den durch den Regelalgorithmus errechneten und durch den vorhergegangenen Mechanismus begrenzten Öffnungsgraden der Ventilantriebe eine Überdeckung oder Unterdeckung einzelner Räume einstellen.
Es werden fortlaufend Zu/Abschläge für die einzelnen Räume errechnet. Überschreitet der Betrag der Zu/Abschläge einen Schwellwert, so werden die Tabellen A max(n) und A min(n) unter Beachtung der möglichen Grenzwerte neu besetzt:- Bei überversorgten Räumen wird die in A max(n) festgelegte Obergrenze der Öffnung in Abhängigkeit von den errechneten Abschlägen nach unten korrigiert, jedoch nicht unter den Wert A min (n).
- Bei unterversorgten Räumen wird der Wert A min (n) in Abhängigkeit von den errechneten Zuschlägen nach oben korrigiert, jedoch nicht über den Wert A max (n).
- Mit diesen neuen Startwerten erfolgt ein erneutes Durchlaufen der Verfahrensschritte ab Schritt 2). Schritt 3) wird dabei nur noch einmal durchlaufen.
- Durch diese wiederkehrenden Optimierungsschritte stellt sich ein Zustand der Anlage ein, bei dem alle Ventile nur noch so weit geöffnet werden, wie es für die Versorgung der Räume notwendig ist, ohne dass eine Unterversorgung der anderen Räume eintritt.
- Im Rahmen der Gegebenheiten der Anlage werden außerdem auch alle Ventile soweit geöffnet und damit der Durchfluss soweit gesteigert, dass keine Unterversorgung auftritt.
- Das Verfahren kann auch bei Anlagen mit Heizkörpern angewendet werden, die über elektrisch betriebene Antriebe angesteuert werden.
- Im Betrieb der Anlage wird durch wiederkehrende Optimierungsschritte für jeden Heizkreis der optimale Durchflusswert eingestellt.
- Dieser ermittelte Zustand ist nicht unveränderlich, sondern passt sich laufend an Änderungen der Bedingungen an, die möglicherweise durch das Nutzerverhalten oder Parameteränderungen, die den Betrieb der Anlage betreffen, hervorgerufen werden. Diese kontinuierlichen Optimierungen führen zu einer Verbesserung des vom Nutzer empfundenen Komforts sowie zu einer Verringerung von unnötigem Energieverbrauch.
- 1) In an initial step, which is run through only once without user intervention, but which can be called up again by the user (reset function), initial values for the maximum degree of opening of the drives (A max (n), n = 1 ... m) and thus the valves that regulate the flow are set. The value required for the minimum degree of opening of the drives (A min (n), n = 1 ... m) is also set. In the initial step, the values for all drives are set to the same value as long as there are no default values. In a variant of the process, individual default values, which, for example, result from the planning values, can be set.
- 2) In a particularly regularly recurring first calibration step, the degree of opening of each drive is increased from the closed position until the value A min (n) is reached, and beyond that until the limit value of the flow in each circuit is recognized. This degree of opening is saved for each drive as the lower limit A min (n), n = 1 ... m of the adjustment range.
- 3) In a particularly regularly recurring and preferably repeated second calibration step, all drives with the exception of the nth drive, starting with n = 1, are now simultaneously up to the degree of opening A. max (n), whereby these degrees of opening either correspond to the values predetermined in step 1, in a second call the values determined in step 4 described below, or if this calibration step is called up again later, the values determined in method step 6 described further below for each heating circuit determined optimized degrees of opening A max (n) correspond.
If, after opening all drives except for the nth drive up to the stated values A max (n), the situation arises that the threshold value for the minimum flow is no longer reached on the nth circuit, then in a first step the Valve of the nth circuit opened so far that this threshold value is reached again. The value A min (n) is newly assigned with this value.
If the minimum flow rate is not set even until the nth drive is fully opened ("Aopen" position), that is, the flow in the nth circuit is still below the threshold value for the minimum flow, the drives of all other valves are switched off closed gradually until the flow in the nth heating circuit reaches the threshold value for the minimum flow again. The values A max (n) are saved. In addition, the condition "maximum value reached" is marked as fulfilled.
If the drive for at least one heating circuit has to be closed to such an extent that the value A min (n) is reached for this heating circuit, further calibration is no longer useful and the process is ended with an error message being output.
After completion of the process, the counter n is increased by the value 1, i.e. the next circuit is selected, and step 3 is carried out and this procedure is repeated until all drives have been dealt with.
After this process has been completed, a maximum value of the degree of opening (A max (n), n = 1 ... m) is known for each valve drive, at which the supply of all other circuits is guaranteed. A minimum value (A min (n), n = 1..m) is also known for each valve drive, which must not be fallen below if all other drives are open up to the determined maximum value. - 4) The process from step 3 can now be repeated, whereby in the next cycle the adjustment range of the drives that is still available is exhausted up to the value "Aopen" (maximum opening). This repetition of the optimization step does not take place if the condition "maximum value reached" is met or the system was already in normal operation.
- 5) After completing the iterative optimization steps 3 and 4, each of the valve drives has a maximum degree of opening (A max (n), n = 1 ... m), which must not be exceeded in order to achieve a minimum flow value in every other circuit ensure, as well as the minimum degree of opening of the valve drive for each circuit (A min (n), n = 1..m) with the maximum degree of opening of all other valve drives.
- 6) In the following regular operation of the system - regulating the room temperatures - the opening degrees of the valve drives calculated by the control algorithm and limited by the previous mechanism will result in an overlap or shortfall in individual rooms.
Surcharges / discounts are continuously calculated for the individual rooms. If the amount of the surcharges / deductions exceeds a threshold value, the tables A max (n) and A min (n) are re-assigned, taking into account the possible limit values:- In the case of oversupplied rooms, the upper limit of the opening set in A max (n) is corrected downwards depending on the calculated deductions, but not below the value A min (n).
- In the case of undersupplied rooms, the value A min (n) is corrected upwards depending on the calculated surcharges, but not above the value A max (n).
- With these new starting values, the process steps from step 2) are run through again. Step 3) is only run through once.
- As a result of these recurring optimization steps, the system is in a state in which all valves are only opened as far as is necessary to supply the rooms, without the other rooms being undersupplied.
- In the context of the conditions of the system, all valves are also opened to the extent that the flow is increased so that there is no undersupply.
- The method can also be used in systems with radiators that are controlled by electrically operated drives.
- When the system is in operation, recurring optimization steps are used to set the optimum flow rate for each heating circuit.
- This determined state is not unchangeable, but continuously adapts to changes in the conditions that may be caused by user behavior or parameter changes that affect the operation of the system. These continuous optimizations lead to an improvement in the comfort perceived by the user and to a reduction in unnecessary energy consumption.
Claims (3)
- Method for carrying out hydraulic balancing of a heating and/or cooling system, operated by means of a temperature-control medium, for e.g. a building, in particular a radiant panel heating and/or cooling system, wherein- the heating and/or cooling system comprises a feed line, a return line and a plurality of heating and/or cooling circuits which are each connected to the feed line and the return line,- each heating and/or cooling circuit comprises a motor-operated valve, the degree of opening of which can be continuously or quasi-continuously adjusted between completely closed and completely open,- during the phases of operation of the heating and/or cooling system in which all the heating and/or cooling circuits are to be supplied with temperature-control medium, temperature-control medium flows through each heating and/or cooling circuit at a flow rate that is between a minimum flow rate and a maximum flow rate, and- a minimum degree of opening and a maximum degree of opening of the valve of the related heating and/or cooling circuit is respectively assigned to the minimum flow rate and to the maximum flow rate,wherein, in the method,a) an initial value for the minimum degree of opening and an initial value for the maximum degree of opening is predetermined for each valve of each heating and/or cooling circuit,b) a first circuit of the heating and/or cooling circuits is selected as the heating and/or cooling circuit to be inspected,c) except for the valve of the heating and/or cooling circuit to be inspected, the relevant initial value for the maximum degree of opening or a maximum degree of opening that has already been re-determined at this point in time is set at the valves of the other heating and/or cooling circuits that are not to be inspected,d) the initial value for the minimum degree of opening is set at the valve of the heating and/or cooling circuit to be inspected,e) the flow rate of the temperature-control medium in the heating and/or cooling circuit to be inspected is determined,f) a check is performed to determine whether the flow rate in the heating and/or cooling circuit to be inspected is equal to the minimum flow rate for this heating and/or cooling circuit,g) if the determined flow rate in the heating and/or cooling circuit to be inspected is less than the minimum flow rate for this heating and/or cooling circuit, the degree of opening of the valve of the heating and/or cooling circuit to be inspected is increased until the determined flow rate for the heating and/or cooling circuit to be inspected is equal to the minimum flow rate for this heating and/or cooling circuit, and this degree of opening of the valve is stored as the new minimum degree of opening of the valve for the heating and/or cooling circuit to be inspected,h) or, if the determined flow rate for the heating and/or cooling circuit to be inspected is less than the minimum flow rate for this heating and/or cooling circuit and the minimum flow rate for the heating and/or cooling circuit still does not come about in this heating and/or cooling circuit even at the maximum degree of opening of the valve for this heating and/or cooling circuit, the degrees of opening of the valves of the other heating and/or cooling circuits that are not to be inspected are gradually reduced until the minimum flow rate comes about in the heating and/or cooling circuit to be inspected, and the degrees of opening of the valves of the other heating and/or cooling circuits that are not to be inspected are stored as their respective new maximum degrees of opening,i) the next circuit of the heating and/or cooling circuits is selected as the heating and/or cooling circuit to be inspected and the method according to steps c) to h) is carried out,j) steps b) to i) are carried out for all the heating and/or cooling circuits, and subsequently a minimum degree of opening and a maximum degree of opening for maintaining the hydraulic balance during operation of the heating and/or cooling system are determined for the valve of each heating and/or cooling circuit.
- Method according to claim 1, characterised in that an error message is output and the method is aborted if, when step h) is carried out, at least the valve of one of the other heating and/or cooling circuits that is not be inspected needs to be closed to such an extent that it reaches or falls below the minimum degree of opening according to its initial value or its already re-determined minimum degree of opening.
- Method according to claim 1 or 2, characterised in that, in regular operation of the heating and/or cooling system, it is identified by analysing the room-temperature profiles if individual rooms are being supplied with too little temperature-control medium and other rooms are being supplied with too much temperature-control medium and, in this case, in a first step, the minimum degrees of opening of the valves that control the heating and/or cooling circuits for the rooms that are being supplied with too little temperature-control medium are increased and, in a second step, the maximum degrees of opening of the valves that control the heating and/or cooling circuits for the rooms that are being supplied with too much temperature-control medium are decreased.
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DE102017115376.4A DE102017115376A1 (en) | 2017-07-10 | 2017-07-10 | Method for carrying out a hydraulic balancing of a heating and / or cooling system such. B. a building |
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DE102004017593B3 (en) | 2004-04-07 | 2005-11-03 | Albert Bauer | Cooling and / or heating device |
DE102006052124A1 (en) | 2006-11-06 | 2008-05-15 | Danfoss A/S | Balancing system for a floor tempering arrangement |
DE102008039525A1 (en) * | 2008-08-23 | 2010-04-15 | Honeywell Technologies Sarl | System for cooling or heating and arrangement for hydraulic balancing of a water or steam-carrying system for cooling or heating |
DE102008049619A1 (en) * | 2008-09-30 | 2010-04-01 | Simplex Armaturen + Fittings Gmbh | Building heating system has two heating circuits, which have heating fluid, and electronic actual flow rate comparison arithmetic unit |
DE102010022763A1 (en) * | 2010-06-05 | 2011-12-08 | Oventrop Gmbh & Co. Kg | Method for automatic hydraulic balancing in fluid-carrying systems |
CH705143A1 (en) * | 2011-06-30 | 2012-12-31 | Belimo Holding Ag | Method and apparatus for balancing a group of consumers in a fluid transport system. |
DE102012002941B4 (en) * | 2012-02-16 | 2015-02-05 | Huu-Thoi Le | Method for operating a heating or cooling system and heating and cooling system |
DE102012015892A1 (en) | 2012-08-10 | 2014-02-13 | Möhlenhoff GmbH | Method for controlling temperature of rooms in building, involves installing heating circuit dispatcher that is connected to rooms of building corresponding to valve that is set between open position and closed position |
DK2894408T3 (en) | 2014-01-14 | 2021-09-27 | Moehlenhoff Gmbh | Method for controlling the temperature in the rooms of a building |
DE102014202738B4 (en) * | 2014-02-14 | 2022-11-17 | Robert Bosch Gmbh | Process for automated hydraulic balancing of a heating system |
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