DE2641223A1 - Heating system boiler control - has regulator producing water temp. varied in response to demand - Google Patents

Heating system boiler control - has regulator producing water temp. varied in response to demand

Info

Publication number
DE2641223A1
DE2641223A1 DE19762641223 DE2641223A DE2641223A1 DE 2641223 A1 DE2641223 A1 DE 2641223A1 DE 19762641223 DE19762641223 DE 19762641223 DE 2641223 A DE2641223 A DE 2641223A DE 2641223 A1 DE2641223 A1 DE 2641223A1
Authority
DE
Germany
Prior art keywords
difference
switching
varied
boiler water
demand
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Withdrawn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
DE19762641223
Other languages
German (de)
Inventor
Helmut Herbig
Klaus Lennarz
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.)
Buderus AG
Original Assignee
Buderus 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 Buderus AG filed Critical Buderus AG
Priority to DE19762641223 priority Critical patent/DE2641223A1/en
Priority to CH1307676A priority patent/CH615013A5/en
Publication of DE2641223A1 publication Critical patent/DE2641223A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium

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

The burner regulating system is used in heating systems in which the difference between the on and off switching temp. response is varied in relation to the given output demand. This regulator is used for producing boiler water temps. which are not to be held at the fixed value but which is varied in relation to the demand, for example by an outside temperature sensor. The difference between the switching on and off temp. is in each situation, smaller than the difference between the inlet and outlet temp. of the boiler water. The switching on and off temperature difference is reduced if this difference is, in operation, greater than the expected non-correctable difference between the inlet and outlet temp. of the boiler water.

Description

Brennerregelung in Heizungsanlagen Burner control in heating systems

Die Erfindung bezieht sich auf eine Brennerregelung in Heizungsanlagen, bei der die Differenz zwischen der Ein- und Ausschalttemperatur (Schaltdifferenz) des Reglers in Abhängigkeit von der jeweiligen Leistungsanforderung veränderlich ist nach Patentanmeldung P 25 49 561.8.The invention relates to a burner control in heating systems, at which the difference between the switch-on and switch-off temperature (switching differential) of the controller can be changed depending on the respective performance requirement is according to patent application P 25 49 561.8.

Durch eine solche Brennerregelung ist es möglich, bei großen Leistungsanforderungen, d.h. bei relativ hohen Kesselwassertemperaturen infolge einer geringen Schaltdifferenz eine hohe mittlere Kesselwassertemperatur zu erzielenund bei kleinen Leistungsanforderungen, d.h. bei relativ niedrigen Kesselwassertemperaturen infolge einer größeren Schaltdifferenz die Brennerlaufzeit zu verlängern. Die geschilderte Brennerregelung ist in Kesselanlagen von Vorteil, in denen die Kesselwassertemperatur nicht auf einem festen Wert gehalten sondern in Abhängigkeit von der benötigten Leistung, z.B. durch einen Außentemperaturfühler variiert wird, d.h. in Anlagen ohne einen dem Kessel nachgeschalteten Heizungsmischer.With such a burner control it is possible, with high performance requirements, i.e. at relatively high boiler water temperatures due to a low switching differential to achieve a high mean boiler water temperature and with low output requirements, i.e. at relatively low boiler water temperatures due to a larger switching differential to extend the burner runtime. The burner control described is in boiler systems advantageous in which the boiler water temperature is not kept at a fixed value but depending on the required power, e.g. by an outside temperature sensor is varied, i.e. in systems without a heating mixer connected downstream of the boiler.

In der Hauptanmeldung ist eine obere Schaltdifferenz von 80 C und eine untere etwa doppelt so große Schaltdifferenz als Beispiel angegeben. In Versuchen haben sich für bestimmte Kesselanlagen Schaltdifferenzen von SO C und 100 C als zweckmäßig erwiesen.In the main application is an upper switching differential of 80 C and a lower switching differential that is approximately twice as large is given as an example. In trials have turned out to be switching differences of SO C and 100 C for certain boiler systems proven expedient.

Es hat sich herausgestellt, daß neben der Leistungsanforderung, d.h. der Höhe der benötigten Kesselwassertemperatur noch ein weiterer Faktor für die Bemessung der Schaltdifferenz berücksichtigt werden muß, u.zw. die Differenz zwischen der Vor- und Rücklauftemperatur des Kesselwassers. Im Allgemeinen liegt diese Temperaturdifferenz bei etwa 200 C. Es passiert jedoch sehr häufig, daß aufgrund überdimensionierter Heizungsumwälzpumpen oder auch falscher Berechnung diese Temperaturdifferenz niedriger liegt.It has been found that in addition to the power requirement, i. the level of the required boiler water temperature is another factor for the Dimensioning of the switching differential must be taken into account, u.zw. the difference between the flow and return temperature of the boiler water. In general, this temperature difference lies at around 200 C. However, it happens a lot often that due to oversized Heating circulation pumps or incorrect calculation, this temperature difference is lower lies.

Da die Brennerregelung nach der Hauptanmeldung in unteren Leistungsbereichen eine große Schaltdifferenz vorsieht, ist es nicht auszuschließen, daß die Schaltdifferenz größer ist als die Differenz zwischen der Vor- und Rücklauftemperatur des Kesselwassers. Infolge der größeren Schaltdifferenz kann dieses zu einer erheblichen Uberheizung des Gebäudes und zu einer Energievergeudung führen.Since the burner control according to the main registration is in the lower performance ranges provides a large switching differential, it cannot be ruled out that the switching differential is greater than the difference between the flow and return temperatures of the boiler water. As a result of the larger switching differential, this can lead to considerable overheating of the building and lead to a waste of energy.

Die geschilderten Nachteile werden gemäß der Erfindung dadurch behoben, daß die Schaltdifferenz in jeder Situation geringer ist als die Differenz zwischen der Vor- und Rücklauftemperatur des Kesselwassers.The disadvantages outlined are eliminated according to the invention by that the switching difference in any situation is less than the difference between the flow and return temperature of the boiler water.

In oberen Leistungsbereichen wird die relativ geringe Schaltdifferenz auf jeden Fall niedriger liegen, als die Differenz zwischen der Vor- und Rücklauftemperatur. In unteren Leistungsbereichen können hingegen Schwierigkeiten auftreten. Sofern hier die Differenz zwischen der Vor- und Rücklauftemperatur die in der Brennerregelung vorgesehene Schaltdifferenz unterschreitet und nicht korrigierbar ist, ist es zweckmäßig, die Schaltdifferenz entsprechend zu verringern. Durch ein geeignetes Element z.B.The relatively low switching differential is in the upper performance ranges in any case lower than the difference between the flow and return temperatures. In contrast, difficulties can arise in the lower performance areas. Provided here the difference between the flow and return temperatures in the burner control is below the intended switching differential and cannot be corrected, it is advisable to to reduce the switching differential accordingly. A suitable element e.g.

einen Schalter im Bereich der Anschlußklemmen ist die Umschaltung durch den Heizungsbauer vorzunehmen.a switch in the area of the connection terminals is the switchover to be carried out by the heating engineer.

Auf den Vorteil einer großen Schaltdifferenz und einer langen Brennerlaufzeit bei niedrigen Kesselwassertemperaturen wird zumindest teilweise verzichtet und dadurch eine Energievergeudung vermieden.On the advantage of a large switching differential and a long burner running time at low boiler water temperatures is at least partially dispensed with and therefore a waste of energy avoided.

Claims (2)

Patentansprüche 1. Brennerregelung in Heizungsanlagen, bei der die Differenz zwischen der Ein- und Ausschalttemperatur (Schaltdifferenz) des Reglers in Abhängigkeit von der jeweiligen Leistungsanforderung veränderlich ist nach Patentanmeldung P 25 49 561.8, dadurch gekennzeichnet, daß die Schaltdifferenz in jeder Situation geringer ist als die Differenz zwischen der Vor- und Rücklauftemperatur des Kesselwassers. Claims 1. Burner control in heating systems in which the Difference between the switch-on and switch-off temperature (switching differential) of the controller depending on the respective performance requirement is variable according to patent application P 25 49 561.8, characterized in that the switching differential in every situation is less than the difference between the flow and return temperatures of the boiler water. 2. Einrichtung zur Brennerreglung nach Anspruch 1, gekennzeichnet durch einen Schalter zur Verringerung der Schaltdifferenz sofern diese im Betriebsfall größer als die nicht korrigierbare Differenz zwischen der Vor- und Rücklauftemperatur des Kesselwassers sein sollte.2. Device for burner control according to claim 1, characterized by means of a switch to reduce the switching difference if this is in operation greater than the uncorrectable difference between the flow and return temperatures of the boiler water should be.
DE19762641223 1975-05-13 1976-09-14 Heating system boiler control - has regulator producing water temp. varied in response to demand Withdrawn DE2641223A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19762641223 DE2641223A1 (en) 1976-09-14 1976-09-14 Heating system boiler control - has regulator producing water temp. varied in response to demand
CH1307676A CH615013A5 (en) 1975-05-13 1976-10-15 Method and device for burner regulation in heating installations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762641223 DE2641223A1 (en) 1976-09-14 1976-09-14 Heating system boiler control - has regulator producing water temp. varied in response to demand

Publications (1)

Publication Number Publication Date
DE2641223A1 true DE2641223A1 (en) 1978-03-30

Family

ID=5987824

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762641223 Withdrawn DE2641223A1 (en) 1975-05-13 1976-09-14 Heating system boiler control - has regulator producing water temp. varied in response to demand

Country Status (1)

Country Link
DE (1) DE2641223A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576332A (en) * 1984-03-02 1986-03-18 Danfoss A/S Heating installation with heat pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576332A (en) * 1984-03-02 1986-03-18 Danfoss A/S Heating installation with heat pump

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Legal Events

Date Code Title Description
8141 Disposal/no request for examination