WO2008014626A1 - Procédé pour régler un brûleur - Google Patents

Procédé pour régler un brûleur Download PDF

Info

Publication number
WO2008014626A1
WO2008014626A1 PCT/CH2007/000363 CH2007000363W WO2008014626A1 WO 2008014626 A1 WO2008014626 A1 WO 2008014626A1 CH 2007000363 W CH2007000363 W CH 2007000363W WO 2008014626 A1 WO2008014626 A1 WO 2008014626A1
Authority
WO
WIPO (PCT)
Prior art keywords
boiler water
burner
water temperature
power
setpoint
Prior art date
Application number
PCT/CH2007/000363
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 EP07785062.6A priority Critical patent/EP2049839B1/fr
Publication of WO2008014626A1 publication Critical patent/WO2008014626A1/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
    • F23N2227/10—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.
  • the difference between the boiler water temperature and the boiler water temperature setpoint value is used, the boiler water temperature setpoint for the heating operation is derived from the current outside temperature, as known for example from DE-C3-25 49 561 is. If the difference between actual and setpoint is large, 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 is running great performance. 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.
  • EP-A1-0 781 965 discloses a gas-heated process water heating system and a method for controlling the process water temperature in such a system. This is about reacting to a fluctuating hot water tapping quantity so that the outlet temperature remains as constant as possible. Therefore, there is a means for measuring the flow of the extracted hot water. It is not apparent that a power limitation is provided for the burner, which could be prevented by the short burner run times.
  • the invention has for its object to prevent these short burner life.
  • the determination variable is additionally varied by limiting the current burner output by means of an additional parameter.
  • the difference between the boiler water temperature actual value and the boiler water temperature set point characterizes the actual heat requirement only insufficiently, because it depends also on which part of the respectively produced heat is taken off immediately 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. Does that take Heating circuit on the other hand, little heat from, then the boiler water temperature increases when the burner is running very fast. This then leads to a quick shutdown of the burner, so a short burner runtime.
  • the effectively effective burner output is thus determined not only by the difference between the boiler water temperature actual value and the boiler water temperature setpoint alone, but additionally by the boiler water temperature setpoint.
  • the sole figure shows a graph for the burner output in function of the boiler water temperature setpoint.
  • the boiler water temperature setpoint T KSO II is plotted.
  • the smallest possible value of room temperature corresponds to T RSO H of 20 degrees.
  • the largest possible value is the boiler water temperature maximum setpoint T ⁇ so iiMax- This is determined by the design of the boiler and by the type of heating system and is for example 70 degrees.
  • the boiler water temperature setpoint TK SO II is in a known manner a function of the outside temperature.
  • the burner power Q is plotted.
  • a modulating burner has a maximum operating power, referred to as rated power QN.
  • a burner can now not be operated with a power close to zero, but it has a certain design minimum performance Q min . Modulating the burner thus takes place within the limits Q min and QN.
  • the ratio QN TO Q min is usually referred to as the degree of modulation.
  • a degree of modulation of the value 3 thus means that the minimum power Q min is one third of the rated power QN.
  • This relative modulation degree M re i is 0% when the burner is running at a power equal to the minimum power Q mm , and it is 100% when the burner is running at its nominal power Q N.
  • Boiler water temperature setpoint T ⁇ s oii 45 degrees, namely
  • the straight line AB ⁇ can also be described as a function with the aid of which the degree of modulation M re i can be calculated in percent:
  • the burner output derived from the difference between the boiler water temperature value T ⁇ i St and the boiler water temperature setpoint T KSOII .
  • this difference is 20 degrees.
  • this value is used for the determination of the instantaneous power of the burner.
  • the boiler water temperature actual value Tjci st 20 degrees and the boiler water temperature setpoint TK SO H - 40 degrees, so that again usually used to control the burner power difference between the boiler water temperature T ⁇ i St and the boiler water temperature setpoint T ⁇ S0 n 20 degrees.
  • the difference of 20 degrees is now not used to control the burner power, but there is a power limitation according to the diagram of the figure.
  • the burner output is limited to 40%. It follows, therefore, that due to the power limitation of the invention, the duration of the burner is extended.
  • the temperature difference of 20 degrees was taken as an example to illustrate the effect of the invention. In practice, of course, it depends on the switching difference, which is effective in the controller. These can be values of the order of 8 or 10 degrees, for example. But much higher differences occur regularly, for example, the transition from a working in the heating night reduction to normal operation, often carried out in a so-called rapid heating, thus ensuring that the occurred overnight cooling of rooms and walls is compensated as quickly as possible. Especially with such a rapid heating prevents the inventive limitation of the burner power frequent switching on and off of the burner with all its adverse effects.
  • the connecting line between points A and B in the diagram does not necessarily have to be a straight line. Also possible is a hyperbolic line, which is shown in dotted lines in the diagram. This leads to a stronger one
  • the effective modulation factor M at , s in percent corresponding to the true burner power can be calculated from the relative modulation degree M re i by means of the relationship QN to Q min as follows:
  • the power control for the burner is carried out in the known manner by a ratio controller for the fuel / air mixture.
  • a ratio controller for the fuel / air mixture is carried out in the known manner.
  • the amount of fuel per unit time is regulated and the amount of air tracked.
  • Boiler water temperature maximum setpoint T ⁇ so ii Max is effective, it does not need to switch between heating and hot water storage to control the burner power.

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 pour régler un brûleur à modulation dont la puissance peut varier entre une puissance minimale Qmin et une puissance nominale QN, la puissance étant réglable proportionnellement à la différence entre une valeur effective de température d'eau de chaudière TKist et une valeur théorique de température d'eau de chaudière TKsoll. Selon l'invention, il intervient une limitation de puissance qui est dérivée de la valeur théorique de température d'eau de chaudière TKsoll. Ainsi, le brûleur reste plus longtemps en service lorsque les besoins en chaleur sont faibles, de telle manière que le nombre de démarrages du brûleur est diminué.
PCT/CH2007/000363 2006-08-02 2007-07-24 Procédé pour régler un brûleur WO2008014626A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07785062.6A EP2049839B1 (fr) 2006-08-02 2007-07-24 Procédé pour régler un brûleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH12412006 2006-08-02
CH1241/06 2006-08-02

Publications (1)

Publication Number Publication Date
WO2008014626A1 true WO2008014626A1 (fr) 2008-02-07

Family

ID=37569642

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2007/000363 WO2008014626A1 (fr) 2006-08-02 2007-07-24 Procédé pour régler un brûleur

Country Status (2)

Country Link
EP (1) EP2049839B1 (fr)
WO (1) WO2008014626A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004799A1 (fr) * 2013-04-23 2014-10-24 Guillot Ind Sa Procede de protection d’un condenseur contre la surchauffe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284221A (ja) * 1985-10-08 1987-04-17 Sanyo Electric Co Ltd 燃焼制御装置
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
EP0781965A1 (fr) * 1995-12-01 1997-07-02 Gaz De France Installation de production d'eau chaude sanitaire par chaudière à gaz et procédé de régulation de la température d'eau chaude sanitaire dans une telle installation
DE102004026236A1 (de) * 2003-08-10 2005-12-15 Reinhard Wilzeck Regelung einer Heizungsanlage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6080019A (ja) * 1983-10-07 1985-05-07 Omron Tateisi Electronics Co 湯沸器の燃焼制御装置
JPH07111268B2 (ja) * 1987-12-09 1995-11-29 松下電器産業株式会社 給湯機の制御装置
JP2601110B2 (ja) * 1992-09-28 1997-04-16 三浦工業株式会社 ボイラの３位置燃焼制御方法
DE19841256C2 (de) * 1998-09-09 2000-10-26 Viessmann Werke Kg Verfahren und Vorrichtung zur Erwärmung bzw. Abkühlung eines Fluids in einem Wärmeaustauscher bzw. Kälteaustauscher und Regelung hierfür

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284221A (ja) * 1985-10-08 1987-04-17 Sanyo Electric Co Ltd 燃焼制御装置
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
EP0781965A1 (fr) * 1995-12-01 1997-07-02 Gaz De France Installation de production d'eau chaude sanitaire par chaudière à gaz et procédé de régulation de la température d'eau chaude sanitaire dans une telle installation
DE102004026236A1 (de) * 2003-08-10 2005-12-15 Reinhard Wilzeck Regelung einer Heizungsanlage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004799A1 (fr) * 2013-04-23 2014-10-24 Guillot Ind Sa Procede de protection d’un condenseur contre la surchauffe
EP2796807A1 (fr) * 2013-04-23 2014-10-29 Guillot Industrie Procédé de protection d un condenseur contre la surchauffe

Also Published As

Publication number Publication date
EP2049839B1 (fr) 2018-06-13
EP2049839A1 (fr) 2009-04-22

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