WO2008017177A1 - Procédé de réglage d'un brûleur - Google Patents

Procédé de réglage d'un brûleur Download PDF

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Publication number
WO2008017177A1
WO2008017177A1 PCT/CH2007/000364 CH2007000364W WO2008017177A1 WO 2008017177 A1 WO2008017177 A1 WO 2008017177A1 CH 2007000364 W CH2007000364 W CH 2007000364W WO 2008017177 A1 WO2008017177 A1 WO 2008017177A1
Authority
WO
WIPO (PCT)
Prior art keywords
water temperature
boiler water
burner
temperature setpoint
value
Prior art date
Application number
PCT/CH2007/000364
Other languages
German (de)
English (en)
Inventor
Josef Wüest
Original Assignee
Toby Ag
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 Toby Ag filed Critical Toby Ag
Priority to EP07785063.4A priority Critical patent/EP2052187B1/fr
Publication of WO2008017177A1 publication Critical patent/WO2008017177A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/082—Regulating fuel supply conjointly with another medium, e.g. boiler water using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/02—Starting or ignition cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/10—Sequential burner running

Definitions

  • the invention relates to a method for controlling a burner according to the preamble of claim 1.
  • Such burners are advantageously used in boilers of residential buildings, with the combination burner / boiler heat for the heating of rooms and usually also for the preparation of domestic hot water is generated.
  • Such boilers are advantageously designed as condensing boiler, through the design of which the exhaust gas is condensed, so that the heat of vaporization is used profitably.
  • EP-A1-0 909 922 discloses a gas-fired burner in which the ratio of gas to air is regulated by means of a microcontroller.
  • Used boiler water temperature setpoint wherein the boiler water temperature setpoint for the heating operation is derived from the current outdoor temperature, as is known for example from DE-C3-25 49 561. If the difference between actual and setpoint is large, so the burner is operated at high power. If the difference between actual and setpoint is small, the burner is operated at low power. At the moment of turning on the burner, the difference has its maximum value. The burner runs with great power. If the burner generates heat, the boiler water is heated. As a result, the boiler water temperature actual value increases continuously. Thus, the difference between the actual and setpoint continuously decreases, with the result that the performance of the burner is further reduced.
  • the invention has for its object to prevent these short burner life.
  • the determination variable is additionally varied by initially not using the actual difference between the boiler water temperature actual value and the boiler water temperature setpoint as the determination variable for the current burner output at the burner start, but rather a modified parameter, and then this parameter is time-dependent is modified so that after a certain time, the difference between the actual boiler water temperature and the boiler water temperature setpoint becomes effective as a determinant for the current burner performance.
  • the burner starts with a high output.
  • the burner's operating time also depends on the actual energy requirement during heat generation.
  • the difference between the boiler water temperature actual value and the boiler water temperature setpoint characterizes the actual heat requirement only insufficiently, because it also depends on which part of the produced heat is immediately removed from the heating circuit. If the heating circuit takes away a lot of heat, the boiler water temperature rises slowly when the burner is running. On the other hand, if the heating circuit absorbs little heat, then the boiler water temperature rises very quickly while the burner is running. This then leads to a quick shutdown of the burner, so a short burner runtime.
  • a corrected control difference Dkorr (Brstart) is used as the starting value for the control of the burner power, which is formed from a corrected boiler water temperature setpoint T ⁇ soiikorr (Brstart) at the moment of burner start and the current boiler water temperature actual value T ⁇ act (BrStart) at the moment of burner start.
  • the value of the boiler water temperature setpoint T ⁇ s oiikorr (Brstart) is set lower than the real current value of the boiler water temperature setpoint T ⁇ so that the corrected control difference Dkor ⁇ (BrStart) is smaller than the real control deviation D rea i, from the current boiler water temperature setpoint T ⁇ S0 n and the current
  • the boiler water temperature setpoint T ⁇ So iikorr at the burner start is equal to that boiler water temperature actual value T ⁇ ist (Brstart) > prevails at the moment of burner start.
  • the boiler water temperature setpoint T ⁇ So ii korr at the moment of burner start is referred to as kettle water temperature setpoint T ⁇ S oiikorr (Brstart).
  • the corrected control deviation Dkorr (Brstart) automatically becomes zero at the moment of burner start.
  • the controller is a PI controller
  • the integral component is set to zero.
  • the burner starts in any case with a minimum power Q m corresponding to its design; n .
  • This minimum power Q ra j n is considerably smaller than a nominal power QN of the burner. Modulating the burner thus takes place in the Limits Q m j n and QN.
  • the ratio QN TO Q m j n is commonly referred to as the degree of modulation.
  • a modulation factor of 3 means that the minimum power Q m j n is one third of the rated power Q N.
  • control difference D w ; rk equals the difference between the actual and setpoint values
  • the control difference changes with the change of the actual and setpoint values.
  • the control difference D W j rk starts with the value zero and is then varied.
  • the boiler water temperature actual value T ⁇ i St is subject to continuous changes. After the burner has heated the combustion chamber, then rises in the sequence and the actual boiler water temperature T ⁇ i S , whose current size is taken into account in the scheme.
  • the factor k in heating operation is about 2 degrees per minute, in operation for charging a hot water tank about 10 degrees per minute.
  • the factor k can be variable in heating mode by adopting variable values as a function of an outside temperature TA.
  • the base value B may be, for example, 1, the multiplier f 0.05.
  • the factor k at -20 degrees outside temperature TA has a value of 3, at 0 degrees outside temperature TA a value of 2 and at 10 degrees outside temperature T A a value of 1.5. Since the actual heat demand is related to the outdoor temperature T A , so a longer burner run time is achieved even when the heat demand is small.
  • the heat demand can be different.
  • a varying heat requirement due to the set boiler water temperature setpoint TK SO II for the boiler load is taken into account anyway. But it also depends on the size of the hot water tank. Therefore, it may be advantageous to provide a value of the factor k that deviates from 10 degrees per minute for the boiler load, namely a smaller value than 10 for a smaller boiler.
  • Fig. 2 shows such a diagram in the event that during the
  • FIG. 1 shows the time t in minutes on the abscissa axis and the temperature on the ordinate axis. Shown on the left is the boiler water temperature setpoint T KSO II, as specified, for example, by the weather control of the heating system.
  • the curve of the boiler water temperature actual value T ⁇ i St is also shown . Before switching on the burner, it will decrease until the switch-on command for the burner is issued. However, after switching on the burner, this value does not increase immediately because it takes a while for the heat produced by the burner to pass to the boiler water.
  • the time-limited variation by the corrected boiler water temperature setpoint Ttc so iiko ⁇ - is effective only in the context of power control, but does not affect the switching behavior with respect to turning off the burner.
  • the true boiler water temperature setpoint TK SO II continues to be effective. This prevents the burner from switching off unnecessarily as long as the controller is not yet in its normal control mode with the formation of the control difference between the true boiler water temperature setpoint T KSO II and the boiler water temperature actual value T ⁇ i s t.
  • FIG. 2 largely corresponds to FIG. 1, so that the explanations for FIG. 1 also apply to FIG. 2.
  • the end of the correction phase determines the boiler water temperature setpoint T ⁇ S oii (Brsta rt ) at the burner start, while in the case of FIG. 2 the comparison value is a boiler water temperature setpoint T ⁇ soiineu which has been changed after the burner start.
  • the invention achieves a greater burner running time. Very short burner run times are avoided. This reduces the number of burner starts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

L'invention concerne un procédé de réglage d'un brûleur modulé dont la puissance est variable entre une puissance minimale Q<SUB>min</SUB> et une puissance nominale Q<SUB>N</SUB>, la puissance étant réglable proportionnellement à la différence entre une température effective T<SUB>Kist</SUB> et une température théorique T<SUB>Ksoll</SUB> d'eau de chaudière. Selon l'invention, comme grandeur déterminante pour la puissance du brûleur au démarrage du brûleur, on n'utilise pas la différence actuelle entre la température effective T<SUB>Kist</SUB> et la température théorique T<SUB>Ksoll</SUB> d'eau de chaudière, mais un paramètre modifié. Ce paramètre est modifié en fonction du temps de telle sorte qu'au bout d'un certain temps, la différence entre la température effective T<SUB>Kist</SUB> et la température théorique T<SUB>Ksoll</SUB> d'eau de chaudière est active comme grandeur déterminante pour la puissance actuelle respective du brûleur. Ce paramètre est une température théorique corrigée T<SUB>Ksollkorr</SUB> d'eau de chaudière, qui influe sur la différence active servant à régler la puissance du brûleur. L'invention permet d'obtenir de plus longs temps de fonctionnement du brûleur.
PCT/CH2007/000364 2006-08-10 2007-07-24 Procédé de réglage d'un brûleur WO2008017177A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07785063.4A EP2052187B1 (fr) 2006-08-10 2007-07-24 Procédé de réglage d'un brûleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1294/06 2006-08-10
CH12942006 2006-08-10

Publications (1)

Publication Number Publication Date
WO2008017177A1 true WO2008017177A1 (fr) 2008-02-14

Family

ID=37575229

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2007/000364 WO2008017177A1 (fr) 2006-08-10 2007-07-24 Procédé de réglage d'un brûleur

Country Status (2)

Country Link
EP (1) EP2052187B1 (fr)
WO (1) WO2008017177A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549561A1 (de) * 1975-11-05 1977-05-18 Buderus Eisenwerk Brennerregelung in heizungsanlagen
GB2161962A (en) * 1984-07-21 1986-01-22 Danfoss As Controllers for heating systems
JPS63148050A (ja) * 1986-12-11 1988-06-20 Hanshin Electric Co Ltd 給湯機における燃焼制御方法
EP0909922A1 (fr) * 1997-10-17 1999-04-21 IABER S.p.A. Système de commande combinée à gaz et à air pour commander la combustion d'une chaudière à gaz
DE19841256A1 (de) * 1998-09-09 2000-03-30 Viessmann Werke Kg Verfahren und Vorrichtung zur Erwärmung bzw. Abkühlung eines Fluids in einem Wärmeaustauscher bzw. Kälteaustauscher und Regelung hierfür
US6129284A (en) * 1998-01-23 2000-10-10 Tridelta Industries, Inc. Integrated appliance control system
DE10203395A1 (de) * 2001-01-31 2002-10-24 Vaillant Gmbh Umlaufwasserheizer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578949B1 (fr) * 1992-07-13 1995-09-06 Landis &amp; Gyr Technology Innovation AG Procédé et dispositif de régulation de la température d'une chaudière
KR0157231B1 (ko) * 1995-11-30 1998-11-16 배순훈 소음감소를 위한 보일러 제어방법

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549561A1 (de) * 1975-11-05 1977-05-18 Buderus Eisenwerk Brennerregelung in heizungsanlagen
GB2161962A (en) * 1984-07-21 1986-01-22 Danfoss As Controllers for heating systems
JPS63148050A (ja) * 1986-12-11 1988-06-20 Hanshin Electric Co Ltd 給湯機における燃焼制御方法
EP0909922A1 (fr) * 1997-10-17 1999-04-21 IABER S.p.A. Système de commande combinée à gaz et à air pour commander la combustion d'une chaudière à gaz
US6129284A (en) * 1998-01-23 2000-10-10 Tridelta Industries, Inc. Integrated appliance control system
DE19841256A1 (de) * 1998-09-09 2000-03-30 Viessmann Werke Kg Verfahren und Vorrichtung zur Erwärmung bzw. Abkühlung eines Fluids in einem Wärmeaustauscher bzw. Kälteaustauscher und Regelung hierfür
DE10203395A1 (de) * 2001-01-31 2002-10-24 Vaillant Gmbh Umlaufwasserheizer

Also Published As

Publication number Publication date
EP2052187B1 (fr) 2017-06-14
EP2052187A1 (fr) 2009-04-29

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