EP1710512B1 - Procédé pour faire fonctionner une installation de chaufage comportant un mélangeur - Google Patents

Procédé pour faire fonctionner une installation de chaufage comportant un mélangeur Download PDF

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Publication number
EP1710512B1
EP1710512B1 EP06101245A EP06101245A EP1710512B1 EP 1710512 B1 EP1710512 B1 EP 1710512B1 EP 06101245 A EP06101245 A EP 06101245A EP 06101245 A EP06101245 A EP 06101245A EP 1710512 B1 EP1710512 B1 EP 1710512B1
Authority
EP
European Patent Office
Prior art keywords
mixer
pump
heat
transfer medium
heat transfer
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.)
Not-in-force
Application number
EP06101245A
Other languages
German (de)
English (en)
Other versions
EP1710512A3 (fr
EP1710512A2 (fr
Inventor
Gerhard Pertiller
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.)
Siemens AG Oesterreich
Original Assignee
Siemens AG Oesterreich
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 Siemens AG Oesterreich filed Critical Siemens AG Oesterreich
Publication of EP1710512A2 publication Critical patent/EP1710512A2/fr
Publication of EP1710512A3 publication Critical patent/EP1710512A3/fr
Application granted granted Critical
Publication of EP1710512B1 publication Critical patent/EP1710512B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
    • F24D19/1033—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve motor operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve

Definitions

  • the invention relates to a method for operating a heating system in which a heat transfer medium is pumped with at least one pump from a heat source via a flow to at least one heat consumer and a return back to the heat source and at least one mixer, the flow temperature by admixture of heat transfer medium is regulated from the return. Furthermore, the invention relates to an arrangement for carrying out the method.
  • Heating systems with central heat generators and heat distribution by means of heat transfer medium to heat consumers are well known. As a rule, buildings are heated with such heating systems.
  • the heat generators are ovens, heat pumps, solar systems or other facilities in which heat is provided.
  • a heated by the heat source heat transfer medium can either circulate directly in the heating circuit or collected in a memory. It is also a renewed heat transfer via a heat exchanger or a four-way mixing valve possible, so that there is a separate heating circuit and a separate heat generator circuit.
  • the heat transfer medium is usually water, optionally mixed with additives to prevent deposits and corrosion in the pipe network.
  • the heated heat transfer medium is transported via a flow to the heat consumers.
  • heat consumers such as radiators, heat exchangers for hot water or heating hoses in foot or wall heaters
  • heat is dissipated to the rooms to be heated or the surfaces to be heated.
  • the cooled Heat transfer medium flows back via a return to the heat source.
  • Flow and return consisting of a line system with facilities for state detection and modification of the heat transfer medium (pumps, control and measuring units, etc.).
  • a natural circulation can be used as a result of the differences in weight between heated and cooled heat transfer medium.
  • the natural circulation is only conditionally controllable, which is why a pump is used according to the prior art for the circulation of the heat transfer medium.
  • the temperature of the heat transfer medium in the flow through the position of a mixer e.g. a three-way mixing valve or a four-way mixing valve, determined.
  • a mixer e.g. a three-way mixing valve or a four-way mixing valve
  • the pump and the mixer are designed for the maximum heating capacity of the heating system.
  • the pump is usually differential pressure controlled and the mixer flow temperature controlled. With decreasing output of heating power with less open heat consumers, the flow rates of the heat transfer medium through the pump and mixer drop. This has for larger heating systems, eg central heated residential buildings, with the result that the pump and mixer must be usable over a wide operating range. For example, only heat exchanger for hot water treatment as a heat consumer can be present in summer operation, pump and mixer then work only with a fraction of the maximum flow rate of the heat transfer medium. It often comes to an undesirable oscillation of the flow temperature, since with low flow rates of the heat transfer medium no optimal mixing operations are possible.
  • a control for heating systems by means of a pump with variable delivery rate for the circulation of a carrier liquid is also in the DE 26 13 297 described.
  • a smaller auxiliary mixer and a smaller auxiliary pump are arranged parallel to a main mixer and a main pump for heating systems which have a high maximum heating capacity with a large operating range.
  • Additional mixer and additional pump are designed for the low flow rates of the heat transfer medium, in which the main pump and main mixer no longer satisfactory mixing process. But even with this solution, it can come in operating areas with further reduction of the flow rates to a swing of the flow temperature.
  • the invention is therefore based on the object to provide a comparison with the prior art improved heating system with mixer.
  • the advantage lies in avoiding the oscillation of the flow temperature in all operating conditions and is due to the arrangement of a reflux bypass, at least a mixer and the at least one pump bridges and over which each supply line of the at least one mixer, a portion of the heat transfer medium is supplied. In that section of the flow, which is located between the connections of the reflux bypass, then the flow rates of the heat transfer medium through the open heat consumers and the return flow bypass. For the pumps and mixers in this section of the flow, it is thus possible to set a minimum flow rate at which the flow temperature does not yet oscillate.
  • An advantageous embodiment of the invention provides that for the at least one mixer a design-dependent minimum flow rate is set, wherein when approaching this with a valve in the return flow bypass, the flow is increased so far that the minimum flow rate in the at least one mixer does not fall below becomes.
  • the heating system can then be operated up to the flow rate through the heat consumer, in which no oscillation of the flow occurs, with closed valve in the return flow bypass. Only when the flow rate approaches the lower limit of the optimized mixer operating range, the valve is opened so that there is always a set minimum flow rate. This optimizes the power consumption of the pump for the entire operating range.
  • the valve is advantageously arranged in the region of the reflux bypass, which is not formed as branches to the mixer ports, so that the entire reflux amount of the heat transfer medium flows through the valve.
  • the non-return valve may be, for example, check valves or check valves, which allow only one direction of flow and thereby have a low flow resistance in the flow direction.
  • the flow rate over the speed of the at least one pump In order to detect the approach to the minimum flow rate in the at least one mixer, it is recommended that the flow rate over the speed of the at least one pump to measure, if it is a centrifugal pump with flow proportional speed.
  • the heat transfer medium is then performed when approaching a minimum speed of the main pump only by means of additional pump on the smaller additional mixer or open the valve in the return flow bypass.
  • additional elements for flow rate measurement can be omitted.
  • heating scheme shown is starting from a heat source 1 via a flow 2 by a mixer 4 and a pump 5, the heated heat transfer medium to heat consumers 8 moves.
  • the heat source 1 may be a heat generator (eg, oven, heat pump, solar element, thermal source, etc.), a memory or a heat transfer device (heat exchanger, four-way mixing valve).
  • the mixer 4 which is shown here as a three-way mixing valve with servomotor M, the heated heat transfer medium, a portion of the cooled heat transfer medium from the return 3 is added.
  • a pump 5 is usually a centrifugal circulation pump used, the flow rate is proportional to the speed.
  • the mixing ratio between the heated and cooled heat transfer medium is determined, resulting in the flow temperature T results, with the heat transfer medium reaches the heat consumers 8 and with a thermometer. 6 is detected.
  • the mixer 4 is regulated so that the flow temperature T follows the setpoint temperature specification.
  • the difference between the pressure in the flow 2 and in the return 4 is detected by a pressure gauge 7.
  • the pump 5 operates with a differential pressure control with constant differential pressure specification. This results in the dependence of the flow rate through the pump 5 on the number of flowed through heat consumer 8, which are usually divided into parallel zones. The fewer zone valves are opened, the lower the flow rate through the pump must be set so that the pressure drop in the heat consumers 8 remains constant. From a design-related minimum flow rate of the mixer 4, it may then come to unwanted oscillation of the flow temperature T.
  • FIG. 2 is that in FIG. 1 Scheme shown extended to the inventive arrangement of a reflux bypass 10, with which prevents the flow rate of the heat transfer medium through the mixer 4 and the pump 5 drops below a minimum value at which it comes to oscillation of the flow temperature T. It is advantageous if the flow rate is detected by the speed of the designed as a centrifugal circulation pump 5.
  • the reflux bypass 10 branches off after the thermometer 6 and leads to a valve 11, with which the flow rate through the reflux bypass 10 is controlled. Behind the valve 11 is a branching and continuation to the two connection points with the inflow lines of the mixer 4.
  • the valve 11 is for example a solenoid valve or a tap, which is controlled by a servomotor M.
  • non-return valve 12 In all lines that open into the inlet lines of the mixer 4, non-return valve 12 are arranged to prevent erroneous circulation.
  • FIG. 3 the scheme of a heating system according to the invention with two mixers 4 and 14 and two pumps 5 and 13 is shown for large residential buildings.
  • the line branch with the main pump 5 and the main mixer 4 a line branch with a smaller auxiliary pump 5 and an additional mixer 4 is connected in parallel.
  • a backflow bypass 10 with a valve 11 is again arranged.
  • the flow temperature T is detected, which serves as an actual variable for the temperature control of the mixer 4 and 14.
  • the pressure drop in the heat consumers 8 corresponding differential pressure Ap between the pressure in the flow 2 and the pressure in the return 3 is detected again via a pressure gauge 7.
  • the differential pressure ⁇ p is the actual variable for the differential pressure control of the pumps 5 and 13.
  • both pumps 5 and 13 are in operation.
  • the speed in the main pump 5 is lowered. This happens until the minimum flow rate for the main mixer 4 is reached.
  • the heat transfer medium is only passed through the smaller additional mixer 14 by the main pump 5 is no longer and the auxiliary pump 13 is operated.
  • the speed of the auxiliary pump 13 is further reduced until the minimum flow rate of the auxiliary mixer 14 is reached.
  • the valve 11 is opened in the return flow bypass and generates an additional circulation through the auxiliary mixer 14 and the auxiliary pump 13.

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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Central Heating Systems (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (6)

  1. Procédé pour faire fonctionner une installation de chauffage, dans lequel on pompe un fluide caloporteur par au moins une pompe ( 4 ) d'une source ( 1 ) de chaleur à au moins un consommateur ( 8 ) de chaleur par un aller ( 2 ) et on le retourne à la source ( 1 ) de chaleur par un retour ( 3 ) et dans lequel on règle la température ( T ) d'aller par au moins un mélangeur ( 4 ) en mélangeant du fluide caloporteur provenant du retour ( 3 ),
    caractérisé en ce qu'on envoie à chaque entrée du au moins un mélangeur une partie du fluide caloporteur par une dérivation ( 10 ) de recyclage court-circuitant le au moins un mélangeur ( 4 ) et la au moins une pompe ( 5 ).
  2. Procédé suivant la revendication 1, caractérisé en ce que pour le au moins un mélangeur ( 4 ) on fixe un débit minimum en fonction du type de construction et en ce que, lorsque l'on se rapproche de ce débit, on augmente, par une vanne ( 11 ) dans la dérivation ( 10 ) de recyclage, le débit tellement que l'on ne passe pas en dessous du débit minimum dans le au moins un mélangeur ( 4 ).
  3. Procédé suivant la revendication 1 à 2, caractérisé en ce que l'on empêche des circulations défectueuses en disposant des obstacles ( 12 ) au recyclage devant tous les points de réunion de conduit.
  4. Procédé suivant la revendication 1 à 2, caractérisé en ce que l'on détecte que l'on s'approche du débit minimum dans le au moins un mélangeur ( 4 ) par la vitesse de rotation de la au moins une pompe ( 5 ).
  5. Installation de chauffage pour la mise en oeuvre du procédé suivant l'une des revendications 1 à 4, caractérisée en ce que dans l'installation du chauffage sont disposées au moins une pompe ( 5 ) et au moins un mélangeur ( 4 ) et en ce qu'il est prévu une dérivation ( 10 ) de recyclage court-circuitant la au moins une pompe ( 5 ) et le au moins un mélangeur et en ce que cette dérivation de recyclage communique avec chaque entrée du au moins un mélangeur.
  6. Installation de chauffage suivant la revendication 5, caractérisée en ce qu'une vanne ( 11 ) de fixation du débit est montée dans la dérivation ( 10 ) de recyclage.
EP06101245A 2005-03-23 2006-02-03 Procédé pour faire fonctionner une installation de chaufage comportant un mélangeur Not-in-force EP1710512B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0049505A AT501299B8 (de) 2005-03-23 2005-03-23 Verfahren zum betreiben einer heizanlage mit mischer

Publications (3)

Publication Number Publication Date
EP1710512A2 EP1710512A2 (fr) 2006-10-11
EP1710512A3 EP1710512A3 (fr) 2008-07-23
EP1710512B1 true EP1710512B1 (fr) 2010-03-31

Family

ID=36587240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06101245A Not-in-force EP1710512B1 (fr) 2005-03-23 2006-02-03 Procédé pour faire fonctionner une installation de chaufage comportant un mélangeur

Country Status (3)

Country Link
EP (1) EP1710512B1 (fr)
AT (2) AT501299B8 (fr)
DE (1) DE502006006545D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013001532B4 (de) 2013-01-29 2018-08-16 Ritter Energie- Und Umwelttechnik Gmbh & Co. Kg Solarrücklaufbeimischung zur Solartemperaturbegrenzung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006054893A1 (de) * 2006-11-20 2008-05-21 Wilo Ag Kompaktheizungsanlage
DE102012202375A1 (de) * 2012-02-16 2013-08-22 Rotex Heating Systems Gmbh Heizsystem und Verfahren zu dessen Betrieb
DE102017116079A1 (de) * 2017-07-18 2019-01-24 Eisenmann Se Versorgungskreis für ein Wärmeträgermedium für einen Verbraucher, Industrieanlage und Verfahren zum Betreiben von solchen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2358754A1 (de) * 1973-11-26 1975-05-28 Schumacher Josef Verfahren und vorrichtung zur steuerung einer heizungsanlage
IT1036636B (it) * 1975-07-25 1979-10-30 Ve Ma Elettropompe Spa Perfezionamento nei mezzi per la regolazione della temperatura di ambienti particolarmente per impianti di riscaldamento a circo lazione forzata di fluido
DE2747969A1 (de) 1977-10-26 1979-05-10 Braukmann Armaturen Regelvorrichtung fuer eine heizungsanlage
DE3727442A1 (de) * 1987-08-17 1989-03-02 Gerhard Urban Verfahren zur erzeugung von warmwasser und vorrichtung zur durchfuehrung dieses verfahrens
DE10122475A1 (de) 2001-05-09 2002-11-14 Froeling Gmbh & Co Kessel Appb Verfahren zur besseren Zirkulation in Trinkwassererwärmungsanlagen
DE20217305U1 (de) 2002-11-09 2003-03-27 Dms Wasser Waermetechnik Gmbh Desinfektion des gesamten Zirkulations-Volumenstromes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013001532B4 (de) 2013-01-29 2018-08-16 Ritter Energie- Und Umwelttechnik Gmbh & Co. Kg Solarrücklaufbeimischung zur Solartemperaturbegrenzung

Also Published As

Publication number Publication date
EP1710512A3 (fr) 2008-07-23
AT501299B8 (de) 2007-02-15
ATE462936T1 (de) 2010-04-15
EP1710512A2 (fr) 2006-10-11
AT501299B1 (de) 2006-08-15
DE502006006545D1 (de) 2010-05-12
AT501299A4 (de) 2006-08-15

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