EP2463593A1 - Procédé de opération d'une installation de chauffage - Google Patents

Procédé de opération d'une installation de chauffage Download PDF

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Publication number
EP2463593A1
EP2463593A1 EP11192503A EP11192503A EP2463593A1 EP 2463593 A1 EP2463593 A1 EP 2463593A1 EP 11192503 A EP11192503 A EP 11192503A EP 11192503 A EP11192503 A EP 11192503A EP 2463593 A1 EP2463593 A1 EP 2463593A1
Authority
EP
European Patent Office
Prior art keywords
volume flow
burner
flow
heating circuit
heating
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.)
Withdrawn
Application number
EP11192503A
Other languages
German (de)
English (en)
Inventor
Huu-Thoi Prof. Dr.-Ing. Le
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viessmann Werke GmbH and Co KG
Original Assignee
Viessmann Werke GmbH and Co KG
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 Viessmann Werke GmbH and Co KG filed Critical Viessmann Werke GmbH and Co KG
Publication of EP2463593A1 publication Critical patent/EP2463593A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—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
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users
    • 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

Definitions

  • the invention relates to a method for operating a heating system according to the preamble of patent claim 1.
  • a heating system or a method for operating a heating system of the type mentioned is according to the DE 10 2008 003 315 A1 known.
  • a circulating in a heating circuit heating medium is at least temporarily heated with a burner, wherein the circulation or a circulation measure of the heating medium with a flow meter (a means for detecting the flow rate) determines and the burner is switched on and off via a control.
  • the invention has for its object to improve a method for operating a heating system of the type mentioned.
  • a heating system for example, even with closed thermostatic valves.
  • the switching on and off of the burner below a predefined minimum volume flow of the heating medium in the heating circuit is determined in dependence on a volumetric flow determined by the volumetric flow meter with the control.
  • volumetric flow meter connected to the regulation according to the invention, it is now possible to detect the actual volumetric flow in a targeted manner, and to selectively influence the service life of the burner when the minimum volumetric flow is undershot. According to the invention, therefore, provision is made in particular for the burner to be actuated by the control above a predefined minimum volume flow in the usual way. However, if the said minimum volume flow is not reached, a function to be explained in more detail is used to determine the maximum Set the burner operating time as a function of the actual volume flow of the heating circuit.
  • an overflow valve (bypass) integrated to operate the heater properly.
  • This overflow valve is installed between the supply and return of the heating system (see FIG. 1 ).
  • FIG. 1 represents the example case that the thermostatic valve on the radiator 5 is closed by the user intervention, so that the volume flow through this radiator 5 is practically close to zero.
  • the return temperature of this radiator is thus very low (approximately room temperature).
  • the thermostatic valve from the radiator 6 is almost closed in this example due to high solar radiation.
  • the return temperature of the radiator 6 is higher than that of the radiator 5.
  • the total volume flow through the heating system is for the case mentioned far below 50 l / h.
  • the boiler with low water content mentioned above requires a minimum volume flow that is well above 100 l / h. If this minimum volume flow is not reached, boiling occurs within the heat exchanger. The frequent repetition of this operating condition caused by the boiling material breaks, corrosion and limescale. As a result, damage to the heat exchanger and, ultimately, this shortens the life of the boiler. In summary, the reliability of the heater in the illustrated example is not guaranteed.
  • the heating system equip with an overflow valve that connects the flow line with the return line. If the thermostatic valves of radiator 5 and 6 are almost closed, the hydraulic resistance of the heating system and the available delivery pressure increase. If this delivery pressure exceeds the spring force of the overflow valve, it opens, ie, the heating water (heating medium) flows via the overflow valve from the flow line to the return line.
  • the overflow valve ensures the minimum volume flow in the boiler circuit.
  • the volume flow that flows through the boiler consists of two partial volume flows: the one flowing through the overflow valve and the one flowing through the heating circuit with the two radiators 5 and 6.
  • overflow valves are equipped with springs.
  • the spring force can be adjusted. If the spring force is set too low, the overflow valve will open too often. Thus, the boiler efficiency or the calorific value utilization is not exhausted.
  • the pump must be driven at high speed in order to transport the heat from the boiler to the individual rooms. Although this ensures user comfort, but increases the electrical energy for pump operation.
  • the pump speed is low, the heating medium flows exclusively through the heating circuit. In this case, the overflow valve does not open, d. H. the minimum circulation through the boiler is not guaranteed.
  • the pump In cases where the spring force is set too high, the pump must always ensure a certain available delivery pressure, which is higher than the spring force of the spill valve, with a correspondingly high pump speed to ensure that at a very low total volume flow, the spill valve opens.
  • the overflow valve guarantees the minimum volume flow. However, this results in a reduction of the boiler efficiency and a greater consumption of electrical energy for pump operation. Incorrect setting of the pump speed and / or the spring force of the overflow valve, which unfortunately often occurs in practice, moreover, noise, loss of comfort and a reduction in the boiler efficiency.
  • the invention is in particular that instead of the overflow valve, a means for detecting the volume flow 3 or a volume flow meter is arranged on the heating circuit or particularly preferably on the central return line of the heating circuit (see FIG. 2 ).
  • the volume flow sensor preferably has a measuring range of 10 to 2000 l / h with an accuracy of less than 2% of the measured value or an absolute deviation of +/- 10 l / h.
  • the pressure drop at the volume flow sensor at a flow rate of 2000 l / h is preferably less than 70 mbar.
  • the function "duration of the burner runtime" depending on the "volume flow” is stored in case it is smaller than a predefined minimum volume flow. This minimum volume flow is either permanently stored in the control or can be entered individually. If, for example, the volumetric flow sensor detects the current volume flow of 30 l / h, which is far below the predefined minimum volumetric flow of, for example, 120 l / h, the above-mentioned function is activated. This function passes the Control then the maximum allowable burner runtime of, for example, 50 seconds. At the same time, the controller checks whether the current boiler return temperature falls below a temperature setpoint. If this is the case, the burner is started for the previously determined permissible burner runtime.
  • a return temperature at return 7 of the heating circuit 1 is determined and the burner 2 is turned on at a below the predefined minimum volume flow volume flow in the heating circuit 1 only when the return temperature falls below a predetermined temperature setpoint.
  • a function is stored in the control 4, with which a maximum permissible burner running time is assigned to each actually determined volume flow lying below the predefined minimum volume flow.
  • FIG. 3 illustrates this connection: After the expiry of the specified burner runtime (from - as in this example - 60 seconds), the temperature at the flow is still below 40 ° C. Although the burner 1 is switched off, the flow temperature continues to rise and reaches the maximum value of about 60 ° C. Thus, vice versa is preferably provided that the burner 2 is switched off at a below the predefined minimum volume flow volume flow after the burner run time even if a flow temperature at the flow 8 of the heating circuit 1 does not yet correspond to a predetermined temperature setpoint.
  • FIG. 4 finally shows an example of the above-mentioned function of the permissible burner running time as a function of the volume flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
EP11192503A 2010-12-10 2011-12-08 Procédé de opération d'une installation de chauffage Withdrawn EP2463593A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010054147A DE102010054147A1 (de) 2010-12-10 2010-12-10 Verfahren zum Betrieb einer Heizungsanlage

Publications (1)

Publication Number Publication Date
EP2463593A1 true EP2463593A1 (fr) 2012-06-13

Family

ID=45315592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11192503A Withdrawn EP2463593A1 (fr) 2010-12-10 2011-12-08 Procédé de opération d'une installation de chauffage

Country Status (2)

Country Link
EP (1) EP2463593A1 (fr)
DE (1) DE102010054147A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024025919A1 (fr) * 2022-07-28 2024-02-01 Bradford White Corporation Recirculation interne avec commande de déclenchement à faible impulsion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014104435U1 (de) 2013-10-01 2014-10-15 Viessmann Werke Gmbh & Co Kg Heizungsanlage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511366A1 (de) * 1994-03-28 1995-10-05 Vaillant Joh Gmbh & Co Verfahren zur Steuerung einer Heizungsanlage
DE19646314C1 (de) 1996-11-09 1998-04-23 Buderus Heiztechnik Gmbh Verfahren zum Betreiben einer Heizungsanlage mit einem Brennwert-Umlaufwassererhitzer
EP1403588A2 (fr) * 2002-09-24 2004-03-31 Robert Bosch Gmbh Installation de chauffage pour bâtiment
DE102008003315A1 (de) 2008-01-07 2009-07-09 Viessmann Werke Gmbh & Co Kg Heizungsanlage und Verfahren zum Betrieb einer Heizungsanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007063489B4 (de) * 2006-12-30 2021-02-04 Hg Baunach Gmbh & Co Kg Verfahren zum Steuern einer Heizanlage mit einer einen von einem Brenner beheizten Wärmetauscher aufweisenden, insbesondere im Brennwertbereich betriebenen Wärmequelle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511366A1 (de) * 1994-03-28 1995-10-05 Vaillant Joh Gmbh & Co Verfahren zur Steuerung einer Heizungsanlage
DE19646314C1 (de) 1996-11-09 1998-04-23 Buderus Heiztechnik Gmbh Verfahren zum Betreiben einer Heizungsanlage mit einem Brennwert-Umlaufwassererhitzer
EP1403588A2 (fr) * 2002-09-24 2004-03-31 Robert Bosch Gmbh Installation de chauffage pour bâtiment
DE102008003315A1 (de) 2008-01-07 2009-07-09 Viessmann Werke Gmbh & Co Kg Heizungsanlage und Verfahren zum Betrieb einer Heizungsanlage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024025919A1 (fr) * 2022-07-28 2024-02-01 Bradford White Corporation Recirculation interne avec commande de déclenchement à faible impulsion

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Publication number Publication date
DE102010054147A1 (de) 2012-06-14

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