EP1862878A2 - Steuerungssystem und Verfahren für ein Netzwerk aus Flüssigkeitsrohren wie z. B. ein Zentralheizungssystem - Google Patents

Steuerungssystem und Verfahren für ein Netzwerk aus Flüssigkeitsrohren wie z. B. ein Zentralheizungssystem Download PDF

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Publication number
EP1862878A2
EP1862878A2 EP07108634A EP07108634A EP1862878A2 EP 1862878 A2 EP1862878 A2 EP 1862878A2 EP 07108634 A EP07108634 A EP 07108634A EP 07108634 A EP07108634 A EP 07108634A EP 1862878 A2 EP1862878 A2 EP 1862878A2
Authority
EP
European Patent Office
Prior art keywords
flow
valve
valves
computer
central computer
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.)
Granted
Application number
EP07108634A
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English (en)
French (fr)
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EP1862878A3 (de
EP1862878B1 (de
Inventor
Mads Lildholdt
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Broen AS
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Broen AS
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Publication date
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Publication of EP1862878A2 publication Critical patent/EP1862878A2/de
Publication of EP1862878A3 publication Critical patent/EP1862878A3/de
Application granted granted Critical
Publication of EP1862878B1 publication Critical patent/EP1862878B1/de
Not-in-force legal-status Critical Current
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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

Definitions

  • the present invention relates to a system for controlling the flow of fluid in a tube network, preferably flow balancing of central heating systems
  • the flow is measured in the valve farthest away, typically called the reference valve, and the flow is balanced with the flow in the valve next to the reference valve.
  • This procedure is tedious and lengthy and is even further difficult if there are general errors in the network such as closed valves or missing throughput through certain tubes. Such errors have to be corrected before flow balancing of the system.
  • Such a check takes typically half an hour for each valve and up to an hour for difficult accessible valves.
  • the initial check for proper throughput in the tubes of the system and the following balancing method is lengthy and tedious.
  • a system for adjustment of valves is disclosed in German open laid script DE 102576211 by Schmitt .
  • the valves are configured for mutual wireless communication.
  • a system for controlling the flow of fluid in a tube network for example a central heating system, the network comprising a fluid forward tube and a fluid return tube, between which there are provided a number of parallel tube strings to constitute parallel fluid circuits,
  • a single person can perform the initial check for errors in the tubing system in a fast way, because all valves can be checked simultaneously with computer, especially if the computer is a handheld device.
  • the tedious procedure where one person is checking flow through one valve and another person is adjusting a valve in a neighbouring string is not necessary, because a single person can read the flow from one valve while adjusting another valve.
  • the person may follow the flow not only to a single valve but may during the valve adjustment follow the flow through all other valves in a branch.
  • the unique ID is comprised by an electronic circuit of the corresponding valve and wherein the electronic circuit is functionally connected to the transmitter, in order for the transmitter to receive this ID for further transmission of the ID to the central computer.
  • the transmitters may be identified by the ID from the corresponding valves, in other words, the transmitters take over the ID of the valve to which the transmitters are connected.
  • the transmitters may have an own ID which, optionally, may be combined with the valve ID.
  • the computer is configured for pre-selection of the IDs of a number of valves and for programming through the keypad to only receive or display measurements from the pre-selected valves.
  • This feature allows a grouping of valves, for example in the same or in a number of buildings.
  • the central computer can thus identify those valves that belong to a certain group and may even combine different groups or part a group into subgroups, if desired. For example, subgroups may belong to different floors in a building, which are combined in the end to form a large group for one building. These large groups for a building may again be part of a balancing method comprising a number of buildings.
  • the grouping according to the invention of the valve IDs may result in a tree-like structure of the balancing method, where subgroups are balanced first and then in steps combined to larger parallel groups, which again are compared mutually for balancing.
  • all transmitters may be programmed to send the measurement data in a steady manner. However, in order to reduce the amount of data to be handled in the computer, it may be programmed to discard or disregard those measurements that are not relevant for the actual adjustment. In addition only relevant, pre-selected measurements may be indicated on the display.
  • An advantage of the above mentioned subgrouping is the possible reduced power consumption because the transmitters may be programmed only to use power for the transmission in case that the valve connected to the transmitter belongs to a selected subgroup.
  • the central computer may be configured to indicate alerts on the display and the IDs of those valves for which the flow through the valves is below a predetermined threshold value.
  • the computer may be started and receive measurements and may automatically indicate those valves for which there are expected errors due to the predetermined parameter values.
  • the transmission unit is also able to receive data.
  • This transceiver may additionally be configured for receiving a trigger signal from the central computer for initiating transmission of flow data to the computer. It may be inconvenient that all transceivers are sending measurement data repeatedly as long as there is no computer to receive the signals or as long as these measurement data are not needed. In order to reduce the electricity consumption and in order to reduce the transmission of unnecessary data, the data transmission may be triggered by a trigger signal from the computer.
  • the transceivers may be configured to transmit a sequence of polling signals with a predetermined time delay between consecutive polling signals as requests for receiving a trigger signal from the central computer.
  • the transceivers may in addition be programmed to await a trigger signal before transmission of flow data. This way, a transmission of measurement data is only performed after receiving such a trigger signal.
  • the combination of the flow gauge and the transceiver may optionally be programmed to only perform the flow measurement after having received such a trigger signal.
  • the computer can be configured for selection of a number of valve IDs and configured for only sending a trigger signal to these selected valves. This implies that the different transceivers select between signals received that are not addressing the transceiver and trigger signals that are addressing the specific transceiver and gauge.
  • the transceivers may be programmed to only perform one transmission of measurement data after having received a trigger signal from the computer.
  • the flow gauges together with the transceiver may be configured for performing and transmitting measurements until a second trigger signal is received.
  • the transceivers may also be configured to send data to the functionally connected electronic circuit of the valve. These data may be received from the central computer for a proper programming of the valves, for example for change of the ID of the valve. However, normally, each valve is provided with a unique ID that cannot be changed.
  • the central computer may be provided with information from a database about the valves, for example the size and capacity of a valve, such that relevant data are available as soon as the ID of a valve is received by the central computer.
  • a different option are flow gauges with transceivers that are configured for performing and transmitting further measurements only if the flow through a valve changes more than a predetermined value. This reduces the number of data sent such that only transmissions are performed if there are measured pronounced changes in the flow through the valve. For example, there may be no need for a new data transmission unless the flow changes by more than a certain percentage of the flow value.
  • the valves may be equipped with an automated electric actuator for regulation of the valve.
  • the actuator may be connected to a receiver that is configured for receiving a wireless data signal from the central computer indicating the desired valve setting and configured for automatically adjusting the valve in response to the signal.
  • the receiver may identical to the same transceiver as mentioned before.
  • the computer may be configured to transmit a valve setting for continuous flow reduction of the valve until a valve setting stop signal is received.
  • the actuator may be set to reduce or increase the valve opening in a steady manner at a predetermined speed, until a stop signal is received by the actuator.
  • the central computer may set a number of valves to change the valve opening steadily while measurements of a number of valves - the same and/or other valves - are performed in order to study the influence of the changes and in order to find an optimum final balance.
  • valves according to the invention may optionally be provided with venturis for the flow measurements. Venturi valves are described in International patent applications WO O1/71289 by Lildholdt or WO 2005/88263 by Engelbrektsson . As alternatives to venturis, fixed or variable orifices may be employed.
  • the computer may be configured for calculating an optimal flow in the tube network in accordance with predetermined flow parameters, and configured for calculating a setting of the flow through each valve to achieve the optimal flow.
  • the computer may in addition be programmed to perform the entire initial check automatically and indicate where errors are to be expected. If there are no errors detected or if errors may be neglected or if errors have been corrected, the entire balancing process may be performed with programmed software routines by the computer. Service personnel or technicians may follow the process by means of the display.
  • the technician enters a building with a central heating system and initiates the triggering process after which the computer with the data transmission capabilities performs the entire check automatically while the technician surveys the process by means of the display.
  • the computer may be configured to await receipt of flow measurement data only from selected transmitters before calculation is initiated of the setting for the first valve to be set in accordance with the predetermined scheme.
  • the central computer can be configured for calculating the regulation of the valves in accordance with a predetermined proportional balancing model for a sequential regulation of the valves in dependence on a valve position in the network.
  • This method has proved to be advantageous due to its simplicity and reliability.
  • due to the aforementioned automatic process a readjustment of the valves is possible without much additional work.
  • other processes may be used for balancing, even those processes that are tedious and difficult according to prior art techniques but which due to the automatic process according to the invention can be performed quickly and reliable without the necessity of substantive human interference.
  • valves are in accordance with a further development provided from a manufacturer or distributor with a flow gauge and a transmitter as a demountable add-on unit on the valve.
  • the unit is then demounted after a flow balancing procedure and sent back to the manufacturer or distributor for recirculation with new valves.
  • the unit also comprises an electric actuator for automated valve setting.
  • the tube system according to the invention has been described as a central heating system.
  • the invention may be used for other tube systems where a control of the flow through a number of parallel strings is desired, for example where a likewise balancing technique is necessary or desired.
  • the data transmission from a transmitter or transceiver may be directly to the central computer of through other transceivers or through special external unit designed for forwarding signals from the different transmitters or transceivers.
  • FIG. 1 illustrates a branch 1 in a fluid network 2.
  • a supply tube 3 delivers heating water to the branch 1 and a network return tube 4 receives the heating water after heat has been delivered to the branch 1.
  • the branch comprises a forward fluid tube 5 and a return fluid tube 6, between which there are provided a number of parallel tube strings 7, 7', 7" to constitute parallel fluid circuits.
  • a circuit implies transport of heating water from supply tube 3 through forward fluid tube 5, string 7, 7', 7", return fluid tube 6 and return tube 4.
  • Each string 7, 7', 7" comprises a heat exchange system 8, 8', 8" and a adjustment valve 9, 9', 9" in each string 7, 7', 7".
  • the branch itself, as well, comprises an overall adjustment valve 10 for adjustment of the total flow through the branch 1.
  • each valve - as illustrated in more detail in FIG. 2 - is equipped with a flow gauge 11 connected to a transceiver 12 for transmission of flow data to a central handheld computer 13 by wireless transmission 14, for example Bluetooth or radio transmission.
  • the actual flow data are transmitted with an ID unique for the corresponding valve 9 and are preferably shown on a display 15 of the handheld computer.
  • a service person may control, whether the flow through the valves are higher than a predetermined value in order to be acceptable.
  • This check may be performed by comparison with a list containing the position of the valves with a corresponding identification code (ID) and the expected flows through the valves.
  • ID identification code
  • a list may be provided manually or may be programmed into the handheld computer.
  • the handheld computer may give an alarm, if the flow through any of the valves is below a predetermined threshold value. Such an alarm would indicate that either the adjustment of the valve is incorrect or that there are obstacles or damages in the tubes preventing a proper functioning of the system. Thus, an alarm would require a subsequent check of valves and tubes.
  • a valve is delivered form the factory fully open to provide maximum flow through the valve when installed.
  • the valve may have been adjusted by mistake which may be checked manually.
  • the valve 9 according to the invention is provided with an adjustment system 16 in combination with an actuator 17.
  • the actuator 17 may report the actual position through the transceiver 12 and to the computer.
  • the computer may be used for transmission of a desired valve setting from the computer 13 to the actuator 17, such that an automated valve adjustment is possible from a remote location. This is an important facilitation for the person performing the check in as much as the valves not always are easily accessible.
  • a balancing adjustment of the valves is performed.
  • This balancing method may be performed in different ways.
  • the problem for a new system is the fact that an adjustment of one valve changes the flow through all the other connected tubes and valves. For example, if one valve is adjusted to a reduced flow, the pressure increases for the other valves, such that the setting is no longer correct. This implies a steady readjustment, until satisfactory system has been found. Adjusting many valves several times requires substantial labour. Doing this with manual labour requires many hours of working in prior art systems.
  • a reference valve 7 is selected, which is typically the valve that is farthest away from the fluid supplying pump. This valve may be adjusted until the flow through the valve 7 reaches its design value. If the design value is larger than the actual value, the valve flow is not reduced but kept fully open and the flow through the other valves is reduced in order to increase the flow through the reference valve.
  • valve 7' is adjusted to its design setting. However, the reduction of flow through valve 7' may cause a slight increase in the first valve 7. This is then reduced by adjustment of the branch valve 10, which also is termed partner valve. The adjustment of the remaining valves 7" in the branch is then performed accordingly with readjustment of the branch valve 10.
  • the flow balancing of the valves in a network is only performed once, such that the valve settings remain stationary for the rest of the lifetime of the valve.
  • the flow gauge 11, the adjustment system 16 actuator 17 and the transceiver 12 only is used once, namely for the balancing procedure.
  • these components are rather expensive, the saved working time by the person checking and adjusting the valves may balance the costs for these additional components.
  • the flow gauge 11, the adjustment system 16 actuator 17 and the transceiver 12 is provided as a complete add on unit, which is mounted on the valve during fabrication of the valve but in a demountable way, such that the unit may be demounted from the valve after the balancing method and sent back to the manufacturer in order to be mounted on the next valve.
  • the handheld computer is provided with a display for displaying the settings and the flow measurements from the different valves.
  • the computer is also provided with a keypad in order to enter commands such as scrolling through the menus and the results and for input of valve settings in accordance with a list.
  • the list may be stored inside the computer memory already, and the balancing method may be performed automatically by the computer.
  • the personnel may in this case only be involved, if there are design settings for the flow cannot be achieved during the initial check or during the balancing method.
  • the display may inform the user about the status of the balancing method. This implies that the initial check as well as the balancing can be performed with a minimum of man power required.
  • the initial check and balancing may be performed in a typical large system with a number of branches. Once all branches have been adjusted individually, the different branches may be adjusted mutually in the same way in which the different strings were adjusted such that the branch valve 10 of the branch farthest away from the pump is adjusted to its design value, after which the remaining branches are correspondingly adjusted.
  • the time from installation of the first valve until all other branches are installed may be substantial.
  • the valves flow gauges in combination with the transceiver should start transmitting flow measurements to the computer. If the transceivers start transmitting measurements from the moment of installation, the power source may not be strong enough to continue the transmission until the last valve has been installed and the balancing method is performed. In order to take account for that, in a further embodiment, the transceiver 12 awaits a trigger signal from the computer 13. Furthermore, the transceiver may only be open for receiving such a trigger signal in repeatedly small time spans in order to further mimimise consumption of electricity.
  • the transceiver In order to synchronise the time span where the transceiver is ready to receive a trigger signal and the computer to send the trigger signal, the transceiver sends a polling signal periodically, for example for each half hour. Once, the computer is ready for performing the initial check of the balancing, the computer sends the trigger signal immediately after having received a polling signal. The trigger signal arrives within the receiving time span of the transceiver, which activates the flow gauge to submit flow measurement data to the transceiver for further transmission to the computer. This set up minimises the current consumption in the measuring and adjusting unit.
  • the transceiver 12, the flow gauge I 1 and the adjustment actuator 16, 17 may stay activated and alert for a certain time such as some hours in order for being capable to receive the adjustment commands and commands for transmission of flow data during the balancing method.
EP07108634A 2006-05-30 2007-05-22 Steuerungssystem für ein Netzwerk aus Flüssigkeitsrohren wie z. B. ein Zentralheizungssystem Not-in-force EP1862878B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK200600734A DK200600734A (en) 2006-05-30 2006-05-30 Flow Balancing

Publications (3)

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EP1862878A2 true EP1862878A2 (de) 2007-12-05
EP1862878A3 EP1862878A3 (de) 2008-05-21
EP1862878B1 EP1862878B1 (de) 2013-01-23

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EP07108634A Not-in-force EP1862878B1 (de) 2006-05-30 2007-05-22 Steuerungssystem für ein Netzwerk aus Flüssigkeitsrohren wie z. B. ein Zentralheizungssystem

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DK (2) DK200600734A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2426421A2 (de) * 2009-04-29 2012-03-07 Semsystem Co., Ltd. Vorrichtung zur automatischen regelung eines konstanten flusses unter berücksichtigung einer heizlast
CN106989278A (zh) * 2016-01-20 2017-07-28 丹佛斯有限公司 利用流量确认过程调试流系统
CN107559926A (zh) * 2017-09-14 2018-01-09 天津大学 一种集中供热系统中的家庭热网主动式换热系统
CN112859938A (zh) * 2021-01-15 2021-05-28 北京动力机械研究所 一种高焓值发动机试车台设施酒精调节系统及控制方法
DE102021202800A1 (de) 2021-03-23 2022-09-29 Bosch Termoteknik Isitma ve Klima Sanayi Ticaret Anonim Sirketi Verfahren zu einem hydraulischen Abgleich eines Fluidkreislaufs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001071289A1 (en) 2000-03-21 2001-09-27 Broen Armatur A/S Control valve
WO2003001312A1 (en) 2001-06-21 2003-01-03 Abb Oy Method and apparatus for controlling systems distributing flowing medium
DE10257621A1 (de) 2002-12-09 2004-07-15 Schleifring Und Apparatebau Gmbh Justagevorrichtung für Schleifringbürsten
WO2005088263A1 (en) 2004-03-16 2005-09-22 Tour And Andersson Ab Valve assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6116512A (en) * 1997-02-19 2000-09-12 Dushane; Steven D. Wireless programmable digital thermostat system
FR2805622B1 (fr) * 2000-02-29 2002-09-13 Didier Catherin Reglage des debits dans une installation constituee de canalisations reliees en parallele ou en serie dans lesquelles circule un fluide
DE10057360C2 (de) * 2000-11-18 2003-10-23 Danfoss As Verfahren zum Überprüfen eines Heizungssystems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001071289A1 (en) 2000-03-21 2001-09-27 Broen Armatur A/S Control valve
WO2003001312A1 (en) 2001-06-21 2003-01-03 Abb Oy Method and apparatus for controlling systems distributing flowing medium
DE10257621A1 (de) 2002-12-09 2004-07-15 Schleifring Und Apparatebau Gmbh Justagevorrichtung für Schleifringbürsten
WO2005088263A1 (en) 2004-03-16 2005-09-22 Tour And Andersson Ab Valve assembly

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2426421A2 (de) * 2009-04-29 2012-03-07 Semsystem Co., Ltd. Vorrichtung zur automatischen regelung eines konstanten flusses unter berücksichtigung einer heizlast
EP2426421A4 (de) * 2009-04-29 2013-12-18 Semsystem Co Ltd Vorrichtung zur automatischen regelung eines konstanten flusses unter berücksichtigung einer heizlast
CN106989278A (zh) * 2016-01-20 2017-07-28 丹佛斯有限公司 利用流量确认过程调试流系统
EP3200041A1 (de) * 2016-01-20 2017-08-02 Danfoss A/S Inbetriebnahme eines durchflusssystems mit einem durchflussverifizierungsverfahren
RU2669181C2 (ru) * 2016-01-20 2018-10-08 Данфосс А/С Ввод в эксплуатацию проточной системы с процедурой верификации потока
CN107559926A (zh) * 2017-09-14 2018-01-09 天津大学 一种集中供热系统中的家庭热网主动式换热系统
CN112859938A (zh) * 2021-01-15 2021-05-28 北京动力机械研究所 一种高焓值发动机试车台设施酒精调节系统及控制方法
CN112859938B (zh) * 2021-01-15 2023-09-08 北京动力机械研究所 一种高焓值发动机试车台设施酒精调节系统及控制方法
DE102021202800A1 (de) 2021-03-23 2022-09-29 Bosch Termoteknik Isitma ve Klima Sanayi Ticaret Anonim Sirketi Verfahren zu einem hydraulischen Abgleich eines Fluidkreislaufs

Also Published As

Publication number Publication date
EP1862878A3 (de) 2008-05-21
EP1862878B1 (de) 2013-01-23
DK1862878T3 (en) 2013-04-22
DK200600734A (en) 2007-12-01

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