EP2687784B1 - System comprising an exhaust device and method for operating such a system - Google Patents

System comprising an exhaust device and method for operating such a system Download PDF

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Publication number
EP2687784B1
EP2687784B1 EP12005270.9A EP12005270A EP2687784B1 EP 2687784 B1 EP2687784 B1 EP 2687784B1 EP 12005270 A EP12005270 A EP 12005270A EP 2687784 B1 EP2687784 B1 EP 2687784B1
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EP
European Patent Office
Prior art keywords
exhaust
air flow
pressure
exhaust pipe
monitor
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EP12005270.9A
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German (de)
French (fr)
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EP2687784A1 (en
Inventor
Dario Quadroni
Urs Forster
Marcel Weber
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Condair Group AG
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Condair Group AG
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Priority to EP12005270.9A priority Critical patent/EP2687784B1/en
Priority to PL12005270T priority patent/PL2687784T3/en
Publication of EP2687784A1 publication Critical patent/EP2687784A1/en
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Publication of EP2687784B1 publication Critical patent/EP2687784B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J11/00—Devices for conducting smoke or fumes, e.g. flues 
    • F23J11/12—Smoke conduit systems for factories or large buildings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/06—Regulating fuel supply conjointly with draught
    • F23N1/062—Regulating fuel supply conjointly with draught using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/02—Regulating draught by direct pressure operation of single valves or dampers

Definitions

  • the present invention relates to a system with a furnace, a ventilation system and an exhaust device and a method for operating such a system according to the preamble of the independent claims.
  • a heat generator Under a furnace, a heat generator is provided with a burner, such as a burner. a hot water system, an oil and / or gas-fired furnace, a gas-operated steam humidifier or the like understood.
  • gas-fired steam humidifiers natural gas is used for steam production e.g. used for humidification in rooms of buildings.
  • the natural gas is burned in a burner of the steam humidifier.
  • the combustion gases are then passed through a heat exchanger of the steam humidifier, so that they heat the water surrounding the heat exchanger, which leads to the generation of steam.
  • a gas-operated steam humidifier is, for example, the Condair GS product from Condair AG (see http://www.waltermeier.com/international/sky/en/product_e_1/dampfbefeuchtung.html).
  • an exhaust device for a firing system in particular a gas-operated steam humidifier, which can be integrated into an existing building without great constructional effort, so that exhaust gas from the firing system can be dissipated in a simple way. It is a particular object of the invention to provide a system with an exhaust device for a firing system, by means of the exhaust gas of the firing system in a permissible manner in an exhaust duct of a room ventilation system of the system initiate and can dissipate through this to the outside.
  • the term "in a permissible manner” refers to the fulfillment of technical safety regulations, as prescribed in particular by state laws and regulations, compliance with which, for example, the Technical Inspection Association (TÜV) and the German Association of Gas and Water (DVGW) and is checked by these and by chimney sweeps.
  • TÜV Technical Inspection Association
  • DVGW German Association of Gas and Water
  • the technical rules DVGW G 631 called.
  • exhaust air duct is understood to mean the air flowing out of the rooms of a building by means of the air conditioning system / extracted and conveyed into the open air.
  • exhaust air includes the air flowing out of the rooms / extracted air before and after one (or more) provided in the exhaust duct of the ventilation system fan.
  • a throttle valve is arranged, which serves to adjust the pressure working range of the furnace. Upstream of the throttle valve in the exhaust pipe, a draft limiter is arranged, which serves to stabilize the pressure in the exhaust pipe.
  • the exhaust device of the system comprises an air flow monitor arranged in the continuous duct of the air conditioning system, by means of which the air flow velocity prevailing in the exhaust air duct can be determined and the gas-operated steam humidifier can be controlled as a function of the determined air flow speed.
  • Terms such as “upstream” and “downstream” refer to the operation of the inventive exhaust device.
  • the term “pressure” includes negative pressure.
  • the firing system can be, for example, a gas-operated steam humidifier.
  • the air flow monitor preferably comprises an air flow sensor for determining the air flow speed and a drive unit for the furnace, for example in the form of a switch for switching on and off the furnace or its power supply.
  • the airflow monitor compares the determined airflow velocity with a predetermined airflow velocity limit set on or deposited in the airflow monitor.
  • the air flow monitor for example, the air flow monitor INT55 of Kriwan Industrie-Elektronik GmbH can be used.
  • the airflow monitor need not be connected to the exhaust pipe, but is preferably provided separately from it.
  • the throttle valve By means of the throttle valve, the working range of the furnace is set. The more the throttle is brought to a closed position, i. the more it closes off the exhaust pipe, the more the negative pressure in the exhaust pipe resulting from the exhaust air flow decreases. At the same time, the throttle valve position influences the overpressure created by the combustion process taking place at the burner of the combustion system. The further the throttle valve is closed, the greater the effect of the overpressure of the burner.
  • the throttle valve is located in the exhaust pipe preferably as close as structurally possible at that open end of the exhaust pipe, which is / is introduced into the exhaust air duct.
  • the throttle valve is provided in the introduced into the exhaust duct / to be introduced portion of the exhaust pipe.
  • the setting of the throttle valve is made and fixed, in particular sealed, prior to commissioning of the inventive exhaust device or the inventive system depending on the structure of the system and the rated power of the furnace.
  • the draft limiter is used to stabilize the pressure in the exhaust pipe.
  • the draft regulator ensures stable pressure conditions at the firing system.
  • a draft limiter for example, a commercial draft limiter of the company Kutzner + Weber can be used.
  • the exhaust device of the system comprises a differential pressure switch which is arranged upstream of the draft limiter on or in the exhaust pipe.
  • the differential pressure monitor preferably comprises a differential pressure sensor for determining the pressure and a drive unit for the furnace, which is designed, for example, as a switch for switching on and off the furnace or its power supply.
  • the differential pressure monitor preferably compares the determined pressure with one or more predetermined pressure limit values which are set or stored in the differential pressure monitor.
  • a differential pressure monitor for example, a commercial differential pressure monitor of the company Condair AG or the company Karl Dungs GmbH & Co. KG can be used. Since the differential pressure monitor monitors the pressure in the exhaust pipe, it does not necessarily have to be pressure-tight.
  • an exhaust gas distribution unit is preferably provided, which may also include that this end of the exhaust pipe is designed as Abgasverteiltician.
  • the Abgasverteiltician is preferably designed as a tube which extends transversely to the direction of exhaust air flow direction and having a plurality of openings for the exit of the exhaust gas of the furnace in the exhaust air duct.
  • the openings in this case point in the direction of the exhaust air flow, so that the exhaust gas inlet takes place in the exhaust air flow in the flow direction and in this way back pressures and inflow of the exhaust air can be avoided in the exhaust pipe.
  • the openings are uniformly distributed over the length of the Abgasverteiltician to allow a uniform in the transverse direction of the exhaust air duct discharge of the exhaust gas.
  • the inventive system comprises a furnace, a ventilation system and an exhaust device.
  • the one open end of the exhaust pipe is attached to an exhaust port of the furnace.
  • the other open end of the exhaust pipe is introduced upstream of one (or more) provided in an exhaust duct of the air conditioning system fan in the continuous channel of the ventilation system.
  • This open end of the exhaust pipe optionally with Abgasverteilä upstream of the fan or is to ensure that at the outlet of the exhaust gas from the exhaust pipe during operation of the air conditioning system always there is a negative pressure.
  • the firing system and the exhaust air duct of the ventilation and air conditioning systems are preferably located in the same room of a building.
  • the air velocity in the exhaust air duct of the ventilation and air-conditioning system is determined by means of the airflow monitor.
  • the determined value of the air flow velocity is compared by means of the air flow monitor with the predetermined air flow velocity limit. If the determined airflow velocity value is below the airflow velocity limit, the airflow monitor will shut off the furnace or its power supply.
  • the specified airflow velocity limit value results from safety regulations, eg for the protection of the environment, in particular in accordance with DVGW G 631. To ensure sufficient dilution of the exhaust gas in the exhaust air of the exhaust air duct before the exhaust air is blown into the atmosphere with the exhaust gas , this preset air flow velocity limit must not be exceeded. As already stated, its falling below for safety reasons leads to the shutdown of the furnace.
  • the air flow velocity limit value (also called the minimum air flow rate) for the exhaust air duct is in particular 50 m 3 / h per kW rated output of the combustion plant. Furthermore, after the initiation of the Be exhaust gas in the exhaust duct in the exhaust duct duct a dilution distance of at least 1 m to be provided.
  • a differential pressure switch is provided and it is determined by means of this prevailing in the exhaust line pressure and compared with a predetermined upper pressure value and preferably also with a predetermined lower pressure limit. If the determined pressure value exceeds the upper pressure limit, then the furnace or its power supply is switched off with the aid of the differential pressure switch. Accordingly, the combustion system or its power supply is switched off or kept in an off state when falling below the lower pressure limit, so that switching on the furnace by the differential pressure monitor is prevented until the determined pressure above the lower pressure limit (and below the upper pressure limit) lies.
  • the differential pressure switch used in particular fulfills the requirements of the standard EN 1854.
  • the upper (lower) pressure limit is in particular at -20 Pa.
  • the upper pressure limit applies to the switched-on state of the gas-operated steam humidifier.
  • the lower (lower) pressure limit is in particular at -80 Pa.
  • the lower pressure limit applies to the off state, e.g. when the gas-powered steam humidifier is in standby mode.
  • the firing system is switched off by the differential pressure switch. If, in contrast, the pressure falls below the lower pressure limit value in the exhaust gas line, this can happen when the firing system is switched on As a result, the flame is drawn from its burner in the exhaust pipe. To prevent this, the differential pressure switch in this case prevents switching on the firing system. Maintaining the upper pressure limit for the furnace and the lower pressure limit for the deactivated combustion system will allow optimal combustion in the furnace.
  • Turning off the furnace or its power supply is also referred to as locking the furnace.
  • the flue gas of the combustion plant is discharged in a simple and safety-permissible manner via the exhaust air duct of the ventilation and air-conditioning system.
  • FIG. 1 shows a system 1 according to the invention with a firing system by way of example in the form of a gas-operated steam humidifier 2 and with a ventilation system, of which the exhaust air duct 3 is shown.
  • a fan 4 is provided for conveying the exhaust air to the outside.
  • the exhaust air duct 3 and several fans can be provided.
  • a steam line 5 connected to the gas-operated steam humidifier 2 the steam generated in the steam humidifier 2 flows via a steam air distribution unit 9 into a supply air duct 6, via which the steam is supplied, for example, to rooms of a building for steam humidification.
  • the steam air distribution unit 9 preferably extends transversely to the flow direction and has a plurality of openings pointing in the direction of flow and unspecified.
  • the gas-operated steam humidifier 2 preferably has a flame monitoring for the burner and an exhaust gas temperature measurement / regulation.
  • the system 1 further comprises an exhaust device 7, which serves the introduction of (combustion) exhaust gas of the gas-operated steam humidifier 2 in the exhaust air duct 3 of the ventilation system.
  • the exhaust device 7 is framed by a dotted box.
  • the exhaust device 7 comprises an exhaust pipe 8, whose one open end is connected to an exhaust port 9 of the gas-operated steam humidifier 2.
  • the other open end of the exhaust pipe 8 is introduced into the exhaust air duct 3 and that upstream of the fan 4 (or the fans 4), so that at this open end of the exhaust pipe 8 during operation of the air conditioning system negative pressure prevails.
  • the exhaust pipe 8 preferably has a length between 3 m and 10 m, wherein taking place in the exhaust pipe 8 pressure reduction due to their cable length and the number of contra-angles provided is preferably not more than 1 Pa per linear meter and per 90 ° angle.
  • the diameter of the exhaust pipe 8 is for example between 80 mm and 160 mm depending on the rated power of the steam humidifier 2 used.
  • one or more condensate traps 18 may be provided for separating condensate from the exhaust pipe 8.
  • a condensate trap 18 is preferably arranged near the waste gas outlet 9 of the steam humidifier 2.
  • a throttle valve 10 is provided in the exhaust pipe 8, the throttle valve position is set before commissioning for adjusting the pressure working range of the gas-operated steam humidifier 2 fixed.
  • the overpressure at the burner of the steam humidifier 2 preferably does not exceed 80 Pa at full load and 5 Pa at partial load, these values depending on the nominal capacity of the steam humidifier 2 used.
  • the throttle valve 10 is arranged as close as possible to the introduced into the exhaust duct open end of the exhaust pipe 8.
  • a draft regulator 11 for stabilizing the prevailing pressure in the exhaust pipe 8 and the pressure conditions at the steam humidifier 2 .
  • the draft limiter 11 in the exhaust pipe 8 is preferably arranged as close as possible to the steam humidifier 2, but preferably not closer than 2 m. It can also be provided in series in series Werbegrenzer 11, resulting in an increase of for safety reasons in the exhaust duct 3 maximum permissible negative pressure results, but also affects the minimum limit for this negative pressure.
  • the draft limiter 11 has in particular a vacuum flap 12 and a supply air supply 13. At elevated negative pressure, the negative pressure flap 12 opens and thus allows the entry of supply air into the exhaust pipe 8 via the supply air supply 13, which leads to a limitation of the pressure prevailing in the exhaust pipe 8 negative pressure. As soon as the desired value for the negative pressure is reached, closes the vacuum flap 12 again. Between the throttle valve 10 and the draft regulator 11, a condensate trap 18 is preferably provided in the exhaust pipe 8.
  • the exhaust device 7 a - preferably separate from the exhaust pipe 8 - arranged in the exhaust air duct 3 of the air conditioning system air flow monitor 14.
  • the air flow monitor 14 measures the prevailing in the exhaust duct 3 air flow velocity. If the measured value of the airflow velocity falls below a set in the air flow monitor 14 air flow speed limit, resulting from safety requirements, the air flow monitor 14 switches off the gas-operated steam humidifier 2.
  • the airflow velocity limit is 50 m 3 / h per kW rated power of the steam humidifier 2.
  • the air flow monitor 14 serves to ensure a sufficient dilution of the introduced into the exhaust duct 3 exhaust gas of the steam humidifier 2 under all conceivable operating conditions of the system 1, for example, even with a blockage in the air conditioning system optionally provided air filter or the like. It is ensured by means of the air flow monitor 14 that only exhaust gas from the steam humidifier 2 in the exhaust air duct 3 of the ventilation system is initiated when a sufficient dilution the exhaust gas in the exhaust air is ensured by a sufficient air flow velocity of the exhaust air, without a separate monitoring of the quality of the exhaust air would be required.
  • the safety-related and legally prescribed limits of 1000 ppm carbon monoxide during normal operation of the ventilation system, of 2000 ppm carbon monoxide at the shutdown (time) point of the ventilation system and of the exhaust air of the exhaust air humidifier 5000 ppm of carbon dioxide are maintained.
  • the operating state of the fan 4 is preferably also detected and the gas-operated steam humidifier 2 is controlled as a function of this operating state.
  • the detection of the operating state of the fan 4 can be done in particular via the detection of the switching state of a release relay, not shown, of the fan 4. If a stop or a shutdown of the fan 4, an immediate rinsing of the steam humidifier 2 is caused by a corresponding control of the gas-operated steam humidifier 2, to exploit the existing shortly after switching off the fan 4 in the exhaust duct 3 air flow.
  • the burner of the rinsing air humidifier 2 that is completely open for rinsing is operated, so that any remaining dirt components or exhaust gases are rinsed out and removed by the air flow still present in the exhaust air duct 3.
  • a differential pressure switch 15 is provided on or in the exhaust pipe 8, which measures the pressure prevailing in the exhaust pipe 8 pressure.
  • the differential pressure switch 15 is upstream of the draft regulator 11, that is arranged between the draft regulator 11 and the exhaust port 9 of the steam humidifier 2, preferably in the center between draft regulator 11 and steam humidifier 2.
  • the differential pressure switch 15 is not arranged closer than 1 m from the exhaust port 9, so that a stationary pressure (essentially without transient response) can be measured.
  • the differential pressure switch 15 switches off the gas-operated steam humidifier 2 when, during operation of the steam humidifier 2, the measured pressure value exceeds an upper pressure limit set at the differential pressure switch 15, in particular -20 Pa, since otherwise the negative pressure prevailing in the exhaust gas line 8 is too low in order to ensure a sufficient discharge of the exhaust gas of the steam humidifier 2 via the exhaust air duct 3.
  • differential pressure switch 15 prevents switching on of the steam humidifier 2 when the measured pressure falls below a set at the differential pressure switch 15 lower pressure limit, otherwise its flame would be sucked into the exhaust pipe 8 when switching on the burner.
  • the introduced into the exhaust duct 3 end of the exhaust pipe 8 is preferably designed as Abgasverteilhow 16, as described in more detail in FIG. 2 is shown.
  • the Abgasverteilhow 16 is preferably formed as extending transversely to the flow direction in the exhaust duct 3 tube, which is provided with a plurality of openings / holes / holes 17 for the exit of the coming of the steam humidifier 2 exhaust gas in the exhaust duct 3.
  • the openings 17 are preferably evenly distributed over the length of the Abgasverteilhow16 and point in the direction of air flow in the exhaust duct 3, so that the exiting the Abgasverteilhow 16 exhaust gases are introduced as uniformly over the width of the exhaust air duct 3 in the exhaust air and thereby a thorough mixing of Exhaust gas and exhaust air and optimal dilution of the exhaust gas in the exhaust air are ensured. Characterized in that the openings 17 point in the direction of the air flow in the exhaust air duct 3, a negative influence on the pressure prevailing in the exhaust pipe 7 / Abgasverteilhowhow 16 negative pressure can be avoided.
  • a plurality of rows of transversely uniformly distributed openings 17 may be provided, wherein the plurality of rows are preferably arranged offset in the transverse direction to each other to further promote the uniform distribution of the exhaust gas in the exhaust air.
  • exhaust gases of a combustion plant e.g. in the form of a gas-operated steam humidifier, efficiently dissipate into the open air via the exhaust duct of a ventilation and air conditioning system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Architecture (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Ventilation (AREA)

Description

Die vorliegende Erfindung betrifft ein System mit einer Feuerungsanlage, einer raumlufttechnischen Anlage und einer Abgasvorrichtung und ein Verfahren zum Betreiben eines solchen Systems gemäss Oberbegriff der unabhängigen Ansprüche.The present invention relates to a system with a furnace, a ventilation system and an exhaust device and a method for operating such a system according to the preamble of the independent claims.

Unter einer Feuerungsanlage wird ein Wärmeerzeuger mit einem Brenner, wie z.B. eine Warmwasseranlage, eine mit Öl und/oder Gas betriebene Feuerungsanlage, ein gasbetriebener Dampfluftbefeuchter oder ähnliches verstanden.Under a furnace, a heat generator is provided with a burner, such as a burner. a hot water system, an oil and / or gas-fired furnace, a gas-operated steam humidifier or the like understood.

Bei gasbetriebenen Dampfluftbefeuchtern wird Erdgas zur Dampfproduktion z.B. für die Luftbefeuchtung in Räumen von Gebäuden eingesetzt. Das Erdgas wird in einem Brenner des Dampfluftbefeuchters verbrannt. Die Verbrennungsgase werden dann durch einen Wärmetauscher des Dampfluftbefeuchters geleitet, sodass sie das den Wärmetauscher umgebende Wasser erhitzen, was zur Dampferzeugung führt. Ein solcher gasbetriebener Dampfluftbefeuchter ist beispielsweise das Produkt Condair GS der Condair AG (siehe http://www.waltermeier.com/international/klima/de/produkt e_1/dampfbefeuchtung.html).In gas-fired steam humidifiers, natural gas is used for steam production e.g. used for humidification in rooms of buildings. The natural gas is burned in a burner of the steam humidifier. The combustion gases are then passed through a heat exchanger of the steam humidifier, so that they heat the water surrounding the heat exchanger, which leads to the generation of steam. Such a gas-operated steam humidifier is, for example, the Condair GS product from Condair AG (see http://www.waltermeier.com/international/klima/en/product_e_1/dampfbefeuchtung.html).

Die (Verbrennungs-)Abgase des gasbetriebenen Dampfluftbefeuchters oder auch anderer Feuerungsanlagen werden üblicherweise über einen Kamin über das Gebäudedach oder Aussenwände des Gebäudes ins Freie abgeführt. US 2012/0083194 A1 zeigt die mechanische Abfuhr der Abgase mehrerer Feuerungsanlagen in einen mit einem Ventilator ausgerüsteten Kamin. Das Anbringen eines derartigen Kamins zur Abgasabfuhr über Dach oder Aussenwände erfordert jedoch einen grösseren bautechnischen Eingriff in das Gebäude.The (combustion) exhaust gases of the gas-operated steam humidifier or other combustion plants are usually discharged through a chimney over the building roof or exterior walls of the building to the outside. US 2012/0083194 A1 shows the mechanical removal of the exhaust gases from several firing systems into a fan-equipped chimney. However, the attachment of such a chimney for flue gas removal via roof or exterior walls requires a major structural intervention in the building.

Ausgehend hiervon ist es Aufgabe der vorliegenden Erfindung, ein System mit einer Abgasvorrichtung für eine Feuerungsanlage, insbesondere einen gasbetriebenen Dampfluftbefeuchter, bereitzustellen, das sich ohne grossen bautechnischen Aufwand in ein bestehendes Gebäude integrieren lässt, sodass sich Abgas der Feuerungsanlage auf einfachem Wege abführen lässt. Es ist insbesondere Aufgabe der Erfindung, ein System mit einer Abgasvorrichtung für eine Feuerungsanlage bereitzustellen, mittels der sich Abgas der Feuerungsanlage auf zulässige Weise in einen Fortluftkanal einer raumlufttechnischen Anlage des Systems einleiten und über diese ins Freie abführen lässt. Mit dem Ausdruck "auf zulässige Weise" wird auf das Erfüllen von technischen Sicherheitsbestimmungen Bezug genommen, wie sie insbesondere durch staatliche Gesetze und Anordnungen vorgeschrieben sind und deren Einhaltung beispielsweise vom Technischen Überwachungs-Verein (TÜV) und vom Deutschen Verein des Gas- und Wasserfaches (DVGW) verlangt und von diesen und von Schornsteinfegern überprüft wird. Insbesondere sei das technische Regelwerk DVGW G 631 genannt.Proceeding from this, it is the object of the present invention to provide a system with an exhaust device for a firing system, in particular a gas-operated steam humidifier, which can be integrated into an existing building without great constructional effort, so that exhaust gas from the firing system can be dissipated in a simple way. It is a particular object of the invention to provide a system with an exhaust device for a firing system, by means of the exhaust gas of the firing system in a permissible manner in an exhaust duct of a room ventilation system of the system initiate and can dissipate through this to the outside. The term "in a permissible manner" refers to the fulfillment of technical safety regulations, as prescribed in particular by state laws and regulations, compliance with which, for example, the Technical Inspection Association (TÜV) and the German Association of Gas and Water ( DVGW) and is checked by these and by chimney sweeps. In particular, the technical rules DVGW G 631 called.

Es ist ferner Aufgabe der Erfindung, ein System mit einer Feuerungsanlage, einer raumlufttechnischen Anlage und einer solchen Abgasvorrichtung und ein Verfahren zum Betreiben eines derartigen Systems bereitzustellen.It is a further object of the invention to provide a system with a combustion system, a ventilation system and such an exhaust device and a method for operating such a system.

Unter einer raumlufttechnischen Anlage wird eine mechanische Lüftungsanlage zur Lüftung von Räumen eines Gebäudes mittels einem oder mehrerer Ventilatoren verstanden. Über den Fortluftkanal wird die aus den Räumen eines Gebäudes mittels der raumlufttechnischen Anlage abströmende/abgesaugte und ins Freie beförderte Luft verstanden. Der Begriff "Fortluft" umfasst die aus den Räumen abströmende/abgesaugte Luft vor und nach einem (oder mehrerer) in dem Fortluftkanal der raumlufttechnischen Anlage vorgesehenen Ventilator.Under a ventilation system is a mechanical ventilation system for ventilation of rooms of a building understood by one or more fans. The exhaust air duct is understood to mean the air flowing out of the rooms of a building by means of the air conditioning system / extracted and conveyed into the open air. The term "exhaust air" includes the air flowing out of the rooms / extracted air before and after one (or more) provided in the exhaust duct of the ventilation system fan.

Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst.This object is solved by the features of the independent claims.

Die Abgasvorrichtung des Systems, welche zur Einleitung von Abgas der Feuerungsanlage in einen Fortlaufkanal einer raumlufttechnischen Anlage vorgesehen ist umfasst eine Abgasleitung, deren eines offene Ende an einen Abgasstutzen einer Feuerungsanlage angeschlossenen werden kann. Das andere offene Ende der Abgasleitung kann in den Fortlaufkanal einer raumlufttechnischen Anlage eingebracht werden. In der Abgasleitung ist eine Drosselklappe angeordnet, die der Einstellung des Druckarbeitsbereichs der Feuerungsanlage dient. Stromauf der Drosselklappe ist in der Abgasleitung ein Zugbegrenzer angeordnet, der der Stabilisierung des Drucks in der Abgasleitung dient. Ferner umfasst die Abgasvorrichtung des Systems einen in dem Fortlaufkanal der raumlufttechnischen Anlage angeordneten Luftstromwächter, mittels dem die in dem Fortluftkanal herrschende Luftstromgeschwindigkeit bestimmt und der gasbetriebene Dampfluftbefeuchter in Abhängigkeit von der bestimmten Luftstromgeschwindigkeit angesteuert werden können. Begriffe wie "stromauf" und "stromab" beziehen sich auf den Betrieb der erfindungsgemässen Abgasvorrichtung. Der Begriff "Druck" umfasst Unterdruck. Bei der Feuerungsanlage kann es sich beispielsweise um einen gasbetriebenen Dampfluftbefeuchter handeln.The exhaust device of the system, which is provided for the introduction of exhaust gas of the furnace in a continuous channel of a ventilation system includes an exhaust pipe, one open end of which can be connected to an exhaust port of a furnace. The other open end of the exhaust pipe can be introduced into the continuous channel of a ventilation system. In the exhaust pipe, a throttle valve is arranged, which serves to adjust the pressure working range of the furnace. Upstream of the throttle valve in the exhaust pipe, a draft limiter is arranged, which serves to stabilize the pressure in the exhaust pipe. Furthermore, the exhaust device of the system comprises an air flow monitor arranged in the continuous duct of the air conditioning system, by means of which the air flow velocity prevailing in the exhaust air duct can be determined and the gas-operated steam humidifier can be controlled as a function of the determined air flow speed. Terms such as "upstream" and "downstream" refer to the operation of the inventive exhaust device. The term "pressure" includes negative pressure. The firing system can be, for example, a gas-operated steam humidifier.

Der Luftstromwächter umfasst vorzugsweise einen Luftstromsensor zur Bestimmung der Luftstromgeschwindigkeit und eine Ansteuereinheit für die Feuerungsanlage, z.B. in Form eines Schalters zum Ein- und Ausschalten der Feuerungsanlage bzw. von deren Stromversorgung. Insbesondere vergleicht der Luftstromwächter die ermittelte Luftstromgeschwindigkeit mit einem vorgegebenen Luftstromgeschwindigkeitsgrenzwert, der an dem Luftstromwächter eingestellt bzw. in diesem hinterlegt ist. Als Luftstromwächter kann beispielsweise der Luftstromwächter INT55 der Kriwan Industrie-Elektronik GmbH eingesetzt werden. Der Luftstromwächter muss nicht mit der Abgasleitung verbunden sein, sondern ist vorzugsweise separat von diesem vorgesehen.The air flow monitor preferably comprises an air flow sensor for determining the air flow speed and a drive unit for the furnace, for example in the form of a switch for switching on and off the furnace or its power supply. In particular, the airflow monitor compares the determined airflow velocity with a predetermined airflow velocity limit set on or deposited in the airflow monitor. As an air flow monitor, for example, the air flow monitor INT55 of Kriwan Industrie-Elektronik GmbH can be used. The airflow monitor need not be connected to the exhaust pipe, but is preferably provided separately from it.

Mittels der Drosselklappe wird der Arbeitsbereich der Feuerungsanlage eingestellt. Je mehr die Drosselklappe in eine geschlossene Stellung gebracht wird, d.h. je mehr sie die Abgasleitung verschliesst, desto mehr vermindert sich der aus dem Fortluftstrom resultierende Unterdruck in der Abgasleitung. Gleichzeitig beeinflusst die Drosselklappenstellung den durch den beim Brenner der Feuerungsanlage ablaufenden Verbrennungsprozess entstehenden Überdruck. Je weiter die Drosselklappe geschlossen wird, desto grösser ist der Effekt des Überdrucks des Brenners.By means of the throttle valve, the working range of the furnace is set. The more the throttle is brought to a closed position, i. the more it closes off the exhaust pipe, the more the negative pressure in the exhaust pipe resulting from the exhaust air flow decreases. At the same time, the throttle valve position influences the overpressure created by the combustion process taking place at the burner of the combustion system. The further the throttle valve is closed, the greater the effect of the overpressure of the burner.

Die Drosselklappe befindet sich in der Abgasleitung vorzugsweise so nahe wie bautechnisch möglich an demjenigen offenen Ende der Abgasleitung, welches in den Fortluftkanal eingebracht ist/werden soll. Bevorzugt ist die Drosselklappe in dem in den Fortluftkanal eingebrachten/einzubringenden Abschnitt der Abgasleitung vorgesehen. Die Einstellung der Drosselklappe wird vor der Inbetriebnahme der erfindungsgemässen Abgasvorrichtung bzw. des erfindungsgemässen Systems in Abhängigkeit vom Aufbau des Systems und von der Nennleistung der Feuerungsanlage vorgenommen und fixiert, insbesondere plombiert.The throttle valve is located in the exhaust pipe preferably as close as structurally possible at that open end of the exhaust pipe, which is / is introduced into the exhaust air duct. Preferably, the throttle valve is provided in the introduced into the exhaust duct / to be introduced portion of the exhaust pipe. The setting of the throttle valve is made and fixed, in particular sealed, prior to commissioning of the inventive exhaust device or the inventive system depending on the structure of the system and the rated power of the furnace.

Der Zugbegrenzer dient der Stabilisierung des Drucks in der Abgasleitung. Ausserdem stellt der Zugbegrenzer stabile Druckverhältnisse an der Feuerungsanlage sicher. Als Zugbegrenzer kann beispielsweise ein handelsüblicher Zugbegrenzer des Unternehmens Kutzner + Weber eingesetzt werden.The draft limiter is used to stabilize the pressure in the exhaust pipe. In addition, the draft regulator ensures stable pressure conditions at the firing system. As a draft limiter, for example, a commercial draft limiter of the company Kutzner + Weber can be used.

Weiter umfasst die Abgasvorrichtung des Systems einen Differenzdruckwächter der stromauf des Zugbegrenzers an bzw. in der Abgasleitung angeordnet ist. Mit dem Differenzdruckwächter können der in der Abgasleitung herrschende Druck bestimmt und die Feuerungsanlage in Abhängigkeit von dem bestimmten Druck angesteuert werden. Der Differenzdruckwächter umfasst vorzugsweise einen Differenzdrucksensor zur Bestimmung des Drucks und eine Ansteuereinheit für die Feuerungsanlage, die z.B. als Schalter zum Ein- und Ausschalten der Feuerungsanlage bzw. von deren Stromversorgung ausgestaltet ist. Der Differenzdruckwächter vergleicht dabei bevorzugt den ermittelten Druck mit einem oder mehreren vorgegebenen Druckgrenzwerten, die an dem Differenzdruckwächter eingestellt bzw. in diesem hinterlegt sind. Als Differenzdruckwächter kann beispielsweise ein handelsüblicher Differenzdruckwächter des Unternehmens Condair AG oder des Unternehmens Karl Dungs GmbH & Co. KG eingesetzt werden. Da durch den Differenzdruckwächter eine Überwachung des Drucks in der Abgasleitung erfolgt, muss diese nicht zwingend druckdicht sein.Furthermore, the exhaust device of the system comprises a differential pressure switch which is arranged upstream of the draft limiter on or in the exhaust pipe. With the differential pressure switch, the pressure prevailing in the exhaust pipe pressure can be determined and the firing system can be controlled in dependence on the specific pressure. The differential pressure monitor preferably comprises a differential pressure sensor for determining the pressure and a drive unit for the furnace, which is designed, for example, as a switch for switching on and off the furnace or its power supply. The differential pressure monitor preferably compares the determined pressure with one or more predetermined pressure limit values which are set or stored in the differential pressure monitor. As a differential pressure monitor, for example, a commercial differential pressure monitor of the company Condair AG or the company Karl Dungs GmbH & Co. KG can be used. Since the differential pressure monitor monitors the pressure in the exhaust pipe, it does not necessarily have to be pressure-tight.

An demjenigen offenen Ende der Abgasleitung, welches im montierten Zustand in den Fortluftkanal eingebracht ist, ist vorzugsweise eine Abgasverteileinheit vorgesehen, was auch beinhalten kann, dass dieses Ende der Abgasleitung als Abgasverteileinheit ausgeführt ist. Die Abgasverteileinheit ist bevorzugt als Rohr ausgeführt, welches sich quer zur Fortluftströmungsrichtung erstreckt und mehrere Öffnungen für den Austritt des Abgases der Feuerungsanlage in den Fortluftkanal aufweist. Die Öffnungen weisen dabei in Richtung der Fortluftströmung, sodass die Abgaseinleitung in den Fortluftstrom in dessen Strömungsrichtung erfolgt und auf diese Weise Staudrücke und ein Einströmen der Fortluft in die Abgasleitung vermieden werden können. Vorzugsweise sind die Öffnungen gleichmässig über die Länge der Abgasverteileinheit verteilt, um eine in Querrichtung des Fortluftkanals gleichmässige Einleitung des Abgases zu ermöglichen.At the open end of the exhaust pipe, which is introduced in the assembled state in the exhaust air duct, an exhaust gas distribution unit is preferably provided, which may also include that this end of the exhaust pipe is designed as Abgasverteileinheit. The Abgasverteileinheit is preferably designed as a tube which extends transversely to the direction of exhaust air flow direction and having a plurality of openings for the exit of the exhaust gas of the furnace in the exhaust air duct. The openings in this case point in the direction of the exhaust air flow, so that the exhaust gas inlet takes place in the exhaust air flow in the flow direction and in this way back pressures and inflow of the exhaust air can be avoided in the exhaust pipe. Preferably, the openings are uniformly distributed over the length of the Abgasverteileinheit to allow a uniform in the transverse direction of the exhaust air duct discharge of the exhaust gas.

Das erfindungsgemässe System umfasst eine Feuerungsanlage, eine raumlufttechnische Anlage und eine Abgasvorrichtung. Das eine offene Ende der Abgasleitung ist an einem Abgasstutzen der Feuerungsanlage angebracht. Das andere offene Ende der Abgasleitung ist stromauf eines (oder mehrerer) in einem Fortluftkanal der raumlufttechnischen Anlage vorgesehenen Ventilators in den Fortlaufkanal der raumlufttechnischen Anlage eingebracht. Durch Anordnung dieses offenen Endes der Abgasleitung, gegebenenfalls mit Abgasverteileinheit, stromauf des bzw. der Ventilatoren wird sichergestellt, dass am Austritt des Abgases aus der Abgasleitung bei Betrieb der raumlufttechnischen Anlage immer ein Unterdruck herrscht. Die Feuerungsanlage und der Fortluftkanal der raumlufttechnischen Anlagen befinden sich vorzugsweise im selben Raum eines Gebäudes.The inventive system comprises a furnace, a ventilation system and an exhaust device. The one open end of the exhaust pipe is attached to an exhaust port of the furnace. The other open end of the exhaust pipe is introduced upstream of one (or more) provided in an exhaust duct of the air conditioning system fan in the continuous channel of the ventilation system. By arranging this open end of the exhaust pipe, optionally with Abgasverteileinheit upstream of the fan or is to ensure that at the outlet of the exhaust gas from the exhaust pipe during operation of the air conditioning system always there is a negative pressure. The firing system and the exhaust air duct of the ventilation and air conditioning systems are preferably located in the same room of a building.

Bei dem erfindungsgemässen Verfahren zum Betreiben des Systems gemäss der Erfindung wird mittels des Luftstromwächters die Luftgeschwindigkeit in dem Fortluftkanal der raumlufttechnischen Anlage bestimmt. Der ermittelte Wert der Luftstromgeschwindigkeit wird mittels des Luftstromwächters mit dem vorgegebenen Luftstromgeschwindigkeitsgrenzwert verglichen. Liegt der ermittelte Luftstromgeschwindigkeitswert unterhalb des Luftstromgeschwindigkeitsgrenzwerts, schaltet der Luftstromwächter die Feuerungsanlage bzw. deren Stromversorgung ab.In the method according to the invention for operating the system according to the invention, the air velocity in the exhaust air duct of the ventilation and air-conditioning system is determined by means of the airflow monitor. The determined value of the air flow velocity is compared by means of the air flow monitor with the predetermined air flow velocity limit. If the determined airflow velocity value is below the airflow velocity limit, the airflow monitor will shut off the furnace or its power supply.

Der vorgegebene Luftstromgeschwindigkeitsgrenzwert ergibt sich aus sicherheitstechnischen Bestimmungen, z.B. zum Schutze der Umwelt, und zwar insbesondere in Anlehnung an das Regelwerk DVGW G 631. Um eine ausreichende Verdünnung des Abgases in der Fortluft des Fortluftkanals sicherzustellen, bevor die Fortluft mit dem Abgas ins Freie geblasen wird, darf dieser vorgegebene Luftstromgeschwindigkeitsgrenzwert nicht unterschritten werden. Wie bereits ausgeführt, führt dessen Unterschreitung aus Sicherheitsgründen zur Abschaltung der Feuerungsanlage. Der Luftstromgeschwindigkeitsgrenzwert (auch Mindestluftvolumenstrom genannt) für den Fortluftkanal beträgt insbesondere 50 m3/h pro kW Nennleistung der Feuerungsanlage. Ferner sollte nach Einleitung des Abgases in den Fortluftkanal im Fortluftkanal eine Verdünnungsstrecke von wenigstens 1 m vorgesehen sein.The specified airflow velocity limit value results from safety regulations, eg for the protection of the environment, in particular in accordance with DVGW G 631. To ensure sufficient dilution of the exhaust gas in the exhaust air of the exhaust air duct before the exhaust air is blown into the atmosphere with the exhaust gas , this preset air flow velocity limit must not be exceeded. As already stated, its falling below for safety reasons leads to the shutdown of the furnace. The air flow velocity limit value (also called the minimum air flow rate) for the exhaust air duct is in particular 50 m 3 / h per kW rated output of the combustion plant. Furthermore, after the initiation of the Be exhaust gas in the exhaust duct in the exhaust duct a dilution distance of at least 1 m to be provided.

Es ist zusätzlich ein Differenzdruckwächter vorgesehen und es wird mittels diesem der in der Abgasleitung herrschende Druck bestimmt und mit einem vorgegebenen oberen Druckwert und vorzugsweise auch mit einem vorgegebenen unteren Druckgrenzwert verglichen. Überschreitet der ermittelte Druckwert den oberen Druckgrenzwert, so wird die Feuerungsanlage bzw. deren Stromversorgung mit Hilfe des Differenzdruckwächters ausgeschaltet. Entsprechend wird bei Unterschreiten des unteren Druckgrenzwerts die Feuerungsanlage bzw. deren Stromversorgung ausgeschaltet bzw. in einem ausgeschalteten Zustand gehalten, so dass ein Einschalten der Feuerungsanlage von dem Differenzdruckwächter solange verhindert wird, bis der ermittelte Druckwert oberhalb des unteren Druckgrenzwerts (und unterhalb des oberen Druckgrenzwerts) liegt. Der eingesetzte Differenzdruckwächter erfüllt insbesondere die Vorgaben in der Norm EN 1854.In addition, a differential pressure switch is provided and it is determined by means of this prevailing in the exhaust line pressure and compared with a predetermined upper pressure value and preferably also with a predetermined lower pressure limit. If the determined pressure value exceeds the upper pressure limit, then the furnace or its power supply is switched off with the aid of the differential pressure switch. Accordingly, the combustion system or its power supply is switched off or kept in an off state when falling below the lower pressure limit, so that switching on the furnace by the differential pressure monitor is prevented until the determined pressure above the lower pressure limit (and below the upper pressure limit) lies. The differential pressure switch used in particular fulfills the requirements of the standard EN 1854.

Für gängige Feuerungsanlagen in Form von gasbetriebenen Dampfluftbefeuchtern, zum Beispiel den eingangs erwähnten Condair GS, liegt der obere (Unter-)Druckgrenzwert insbesondere bei -20 Pa. Der obere Druckgrenzwert gilt für den eingeschalteten Zustand des gasbetriebenen Dampfluftbefeuchters. Der untere (Unter-)Druckgrenzwert liegt insbesondere bei -80 Pa. Der untere Druckgrenzwert gilt für den ausgeschalteten Zustand, z.B. wenn sich der gasbetriebene Dampfluftbefeuchter im Standby-Betrieb befindet.For common firing systems in the form of gas-operated steam humidifiers, for example the aforementioned Condair GS, the upper (lower) pressure limit is in particular at -20 Pa. The upper pressure limit applies to the switched-on state of the gas-operated steam humidifier. The lower (lower) pressure limit is in particular at -80 Pa. The lower pressure limit applies to the off state, e.g. when the gas-powered steam humidifier is in standby mode.

Wird in der Abgasleitung der Abgasvorrichtung der obere Druckgrenzwert überschritten, so liegt nicht genügend Unterdruck bzw. zuviel Staudruck in der Abgasleitung vor, um eine genügende Einleitung des Abgases in den Fortluftkanal zu gewährleisten, und die Feuerungsanlage wird vom Differenzdruckwächter abgeschaltet. Wird in der Abgasleitung dahingegen der untere Druckgrenzwert unterschritten, so kann dies beim Einschalten der Feuerungsanlage zur Folge haben, dass die Flamme von dessen Brenner in die Abgasleitung gezogen wird. Um dies zu verhindern, unterbindet der Differenzdruckwächter in diesem Fall ein Einschalten der Feuerungsanlage. Das Einhalten des oberen Druckgrenzwerts für die Feuerungsanlage und des unteren Druckgrenzwerts für die ausgeschaltete Feuerungsanlage ermöglicht eine optimale Verbrennung bei der Feuerungsanlage.If the upper pressure limit value is exceeded in the exhaust pipe of the exhaust gas device, there is insufficient negative pressure or too much back pressure in the exhaust pipe to ensure sufficient introduction of the exhaust gas into the exhaust air duct, and the firing system is switched off by the differential pressure switch. If, in contrast, the pressure falls below the lower pressure limit value in the exhaust gas line, this can happen when the firing system is switched on As a result, the flame is drawn from its burner in the exhaust pipe. To prevent this, the differential pressure switch in this case prevents switching on the firing system. Maintaining the upper pressure limit for the furnace and the lower pressure limit for the deactivated combustion system will allow optimal combustion in the furnace.

Das Ausschalten der Feuerungsanlage bzw. von deren Stromversorgung wird auch als Verriegelung der Feuerungsanlage bezeichnet.Turning off the furnace or its power supply is also referred to as locking the furnace.

Mit Hilfe der Erfindung kann vorteilhafterweise auf eine zusätzliche, separate Abgasanlage für die Abführung von Abgas der Feuerungsanlage verzichtet werden. Das Abgas der Feuerungsanlage wird einfach und auf sicherheitstechnisch zulässige Weise über den Fortluftkanal der raumlufttechnischen Anlage abgeführt.With the help of the invention can advantageously be dispensed with an additional, separate exhaust system for the discharge of exhaust gas of the furnace. The flue gas of the combustion plant is discharged in a simple and safety-permissible manner via the exhaust air duct of the ventilation and air-conditioning system.

Ferner lässt sich über die Einleitung des Abgases der Feuerungsanlage in den Fortluftkanal der raumlufttechnischen Anlage vorteilhafterweise die Wärme der Fortluft rückgewinnen und von der raumlufttechnischen Anlage nutzen. Die Wärme des Abgases kann also regenerativ genutzt werden, was abhängig vom Wirkungsgrad der raumlufttechnischen Anlage zu deutlichen Energiegewinnen führen kann.Furthermore, can be on the introduction of the exhaust gas of the furnace in the exhaust air duct of the ventilation system recover advantageously the heat of the exhaust air and use of the air conditioning system. The heat of the exhaust gas can thus be used regeneratively, which can lead to significant energy gains depending on the efficiency of the ventilation system.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen und den anhand der Zeichnungen nachfolgend dargestellten Ausführungsbeispielen. Es zeigen:

  • Fig. 1 eine schematische Darstellung des erfindungsgemässen Systems mit erfindungsgemässer Abgasvorrichtung für eine Feuerungsanlage in Form eines gasbetriebenen Dampfluftbefeuchters und
  • Fig. 2 eine schematische perspektivische Darstellung einer in den Fortluftkanal einer raumlufttechnischen Anlage eingebrachten Abgasverteileinheit einer erfindungsgemässen Abgasvorrichtung.
Further advantageous embodiments of the invention will become apparent from the dependent claims and the embodiments illustrated below with reference to the drawings. Show it:
  • Fig. 1 a schematic representation of the inventive system with inventive exhaust device for a furnace in the form of a gas-operated steam humidifier and
  • Fig. 2 a schematic perspective view of an introduced into the exhaust air duct of a ventilation system exhaust gas distribution unit of an inventive exhaust device.

In den Figuren bezeichnen gleiche Bezugszeichen gleiche oder gleich wirkende Komponenten. Die Pfeile in den Figuren kennzeichnen die Strömungsrichtung.In the figures, like reference numerals designate like or equivalent components. The arrows in the figures indicate the direction of flow.

Figur 1 zeigt ein erfindungsgemässes System 1 mit einer Feuerungsanlage beispielhaft in Form eines gasbetriebenen Dampfluftbefeuchters 2 und mit einer raumlufttechnischen Anlage, von der der Fortluftkanal 3 gezeigt ist. In dem Fortluftkanal 3 ist ein Ventilator 4 zur Förderung der Fortluft ins Freie vorgesehen. In dem Fortluftkanal 3 können auch mehrere Ventilatoren vorgesehen sein. Über eine mit dem gasbetriebenen Dampfluftbefeuchter 2 verbundene Dampfleitung 5 strömt der in dem Dampfluftbefeuchter 2 erzeugte Wasserdampf über eine Dampfluftverteileinheit 9 in einen Zuluftkanal 6, über welchen der Wasserdampf z.B. Räumlichkeiten eines Gebäudes zur Dampfluftbefeuchtung zugeführt wird. Die Dampfluftverteileinheit 9 erstreckt sich vorzugsweise quer zur Strömungsrichtung und weist mehrere in Strömungsrichtung weisende, nicht näher bezeichnete Öffnungen auf. Der gasbetriebene Dampfluftbefeuchter 2 weist vorzugsweise eine Flammenüberwachung für den Brenner und eine Abgastemperaturmessung/-regelung auf. FIG. 1 shows a system 1 according to the invention with a firing system by way of example in the form of a gas-operated steam humidifier 2 and with a ventilation system, of which the exhaust air duct 3 is shown. In the exhaust air duct 3, a fan 4 is provided for conveying the exhaust air to the outside. In the exhaust air duct 3 and several fans can be provided. Via a steam line 5 connected to the gas-operated steam humidifier 2, the steam generated in the steam humidifier 2 flows via a steam air distribution unit 9 into a supply air duct 6, via which the steam is supplied, for example, to rooms of a building for steam humidification. The steam air distribution unit 9 preferably extends transversely to the flow direction and has a plurality of openings pointing in the direction of flow and unspecified. The gas-operated steam humidifier 2 preferably has a flame monitoring for the burner and an exhaust gas temperature measurement / regulation.

Das System 1 umfasst ferner eine Abgasvorrichtung 7, die der Einleitung von (Verbrennungs-)Abgas des gasbetriebenen Dampfluftbefeuchters 2 in den Fortluftkanal 3 der raumlufttechnischen Anlage dient. In der Figur 1 ist die Abgasvorrichtung 7 durch eine gepunktete Box eingerahmt. Die Abgasvorrichtung 7 umfasst eine Abgasleitung 8, deren eines offene Ende an einen Abgasstutzen 9 des gasbetriebenen Dampfluftbefeuchters 2 angeschlossen ist. Das andere offene Ende der Abgasleitung 8 ist in den Fortluftkanal 3 eingebracht und zwar stromauf des Ventilators 4 (bzw. der Ventilatoren 4), sodass an diesem offenen Ende der Abgasleitung 8 im Betrieb der raumlufttechnischen Anlage Unterdruck herrscht.The system 1 further comprises an exhaust device 7, which serves the introduction of (combustion) exhaust gas of the gas-operated steam humidifier 2 in the exhaust air duct 3 of the ventilation system. In the FIG. 1 the exhaust device 7 is framed by a dotted box. The exhaust device 7 comprises an exhaust pipe 8, whose one open end is connected to an exhaust port 9 of the gas-operated steam humidifier 2. The other open end of the exhaust pipe 8 is introduced into the exhaust air duct 3 and that upstream of the fan 4 (or the fans 4), so that at this open end of the exhaust pipe 8 during operation of the air conditioning system negative pressure prevails.

Abhängig vom Gebäude, in welchem die erfindungsgemässe Abgasvorrichtung 7 installiert werden soll, und/oder der Nennleistung des gasbetriebenen Dampfluftbefeuchters 2 hat die Abgasleitung 8 vorzugsweise eine Länge zwischen 3 m und 10 m, wobei der in der Abgasleitung 8 stattfindende Druckabbau infolge von deren Leitungslänge und der Anzahl vorgesehener Winkelstücke bevorzugt maximal 1 Pa pro Längenmeter und pro 90°-Winkel beträgt. Der Durchmesser der Abgasleitung 8 beträgt beispielsweise zwischen 80 mm und 160 mm abhängig von der Nennleistung des eingesetzten Dampfluftbefeuchters 2. In der Abgasleitung 8 können eine oder mehrere Kondensatfallen 18 zum Abscheiden von Kondensat aus der Abgasleitung 8 vorgesehen sein. Eine Kondensatfalle 18 ist vorzugsweise nahe dem Abgasstutzen 9 des Dampfluftbefeuchters 2 angeordnet.Depending on the building in which the inventive exhaust device 7 is to be installed, and / or the rated power of the gas-operated steam humidifier 2, the exhaust pipe 8 preferably has a length between 3 m and 10 m, wherein taking place in the exhaust pipe 8 pressure reduction due to their cable length and the number of contra-angles provided is preferably not more than 1 Pa per linear meter and per 90 ° angle. The diameter of the exhaust pipe 8 is for example between 80 mm and 160 mm depending on the rated power of the steam humidifier 2 used. In the exhaust pipe 8, one or more condensate traps 18 may be provided for separating condensate from the exhaust pipe 8. A condensate trap 18 is preferably arranged near the waste gas outlet 9 of the steam humidifier 2.

Ferner ist in der Abgasleitung 8 eine Drosselklappe 10 vorgesehen, deren Drosselklappenstellung vor Inbetriebnahme zur Einstellung des Druckarbeitsbereichs des gasbetriebenen Dampfluftbefeuchters 2 fest eingestellt wird. Dabei überschreitet der Überdruck am Brenner des Dampfluftbefeuchters 2 vorzugsweise 80 Pa bei Volllast und 5 Pa bei Teillast nicht, wobei diese Werte von der Nennleistung des eingesetzten Dampfluftbefeuchters 2 abhängen. Die Drosselklappe 10 ist möglichst nahe des in den Fortluftkanal eingebrachten offenen Endes der Abgasleitung 8 angeordnet.Further, a throttle valve 10 is provided in the exhaust pipe 8, the throttle valve position is set before commissioning for adjusting the pressure working range of the gas-operated steam humidifier 2 fixed. In this case, the overpressure at the burner of the steam humidifier 2 preferably does not exceed 80 Pa at full load and 5 Pa at partial load, these values depending on the nominal capacity of the steam humidifier 2 used. The throttle valve 10 is arranged as close as possible to the introduced into the exhaust duct open end of the exhaust pipe 8.

Stromauf der Drosselklappe 10, d.h. zwischen der Drosselklappe 10 und dem mit dem Abgasstutzen 9 des Dampfluftbefeuchters 2 verbundenen/verbindbaren Ende der Abgasleitung 8 ist in der Abgasleitung 8 ein Zugbegrenzer 11 zur Stabilisierung des in der Abgasleitung 8 herrschenden Drucks und der Druckverhältnisse am Dampfluftbefeuchter 2 vorgesehen. Hierfür ist der Zugbegrenzer 11 in der Abgasleitung 8 vorzugsweise möglichst nahe zum Dampfluftbefeuchter 2 angeordnet, jedoch bevorzugt nicht näher als 2 m. Es können auch mehrere in Serie geschaltete Zugbegrenzer 11 vorgesehen sein, was zu einer Erhöhung des aus sicherheitstechnischen Gründen in dem Fortluftkanal 3 maximalen zulässigen Unterdrucks führt, jedoch auch den minimalen Grenzwert für diesen Unterdruck beeinflusst.Upstream of the throttle valve 10, that is, between the throttle valve 10 and connected to the exhaust port 9 of the steam humidifier 2 / connectable end of the exhaust pipe 8 is provided in the exhaust pipe 8, a draft regulator 11 for stabilizing the prevailing pressure in the exhaust pipe 8 and the pressure conditions at the steam humidifier 2 , For this purpose, the draft limiter 11 in the exhaust pipe 8 is preferably arranged as close as possible to the steam humidifier 2, but preferably not closer than 2 m. It can also be provided in series in series Zugbegrenzer 11, resulting in an increase of for safety reasons in the exhaust duct 3 maximum permissible negative pressure results, but also affects the minimum limit for this negative pressure.

Der Zugbegrenzer 11 weist insbesondere eine Unterdruckklappe 12 und eine Zuluftzufuhr 13 auf. Bei erhöhtem Unterdruck öffnet die Unterdruckklappe 12 und ermöglicht damit den Eintritt von Zuluft in die Abgasleitung 8 über die Zuluftzufuhr 13, was zu einer Begrenzung des in der Abgasleitung 8 herrschenden Unterdrucks führt. Sobald der gewünschte Wert für den Unterdruck erreicht ist, schliesst die Unterdruckklappe 12 wieder. Zwischen der Drosselklappe 10 und dem Zugbegrenzer 11 ist in der Abgasleitung 8 vorzugsweise eine Kondensatfalle 18 vorgesehen.The draft limiter 11 has in particular a vacuum flap 12 and a supply air supply 13. At elevated negative pressure, the negative pressure flap 12 opens and thus allows the entry of supply air into the exhaust pipe 8 via the supply air supply 13, which leads to a limitation of the pressure prevailing in the exhaust pipe 8 negative pressure. As soon as the desired value for the negative pressure is reached, closes the vacuum flap 12 again. Between the throttle valve 10 and the draft regulator 11, a condensate trap 18 is preferably provided in the exhaust pipe 8.

Weiterhin weist die Abgasvorrichtung 7 einen - vorzugsweise separat von der Abgasleitung 8 - in dem Fortluftkanal 3 der raumlufttechnischen Anlage angeordneten Luftstromwächter 14 auf. Der Luftstromwächter 14 misst die in dem Fortluftkanal 3 herrschende Luftstromgeschwindigkeit. Unterschreitet der gemessene Wert der Luftstromgeschwindigkeit einen in dem Luftstromwächter 14 eingestellten Luftstromgeschwindigkeitsgrenzwert, der sich aus sicherheitstechnischen Anforderungen ergibt, so schaltet der Luftstromwächter 14 den gasbetriebenen Dampfluftbefeuchter 2 ab. Insbesondere liegt der Luftstromgeschwindigkeitsgrenzwert bei 50 m3/h pro kW Nennleistung des Dampfluftbefeuchters 2.Furthermore, the exhaust device 7 a - preferably separate from the exhaust pipe 8 - arranged in the exhaust air duct 3 of the air conditioning system air flow monitor 14. The air flow monitor 14 measures the prevailing in the exhaust duct 3 air flow velocity. If the measured value of the airflow velocity falls below a set in the air flow monitor 14 air flow speed limit, resulting from safety requirements, the air flow monitor 14 switches off the gas-operated steam humidifier 2. In particular, the airflow velocity limit is 50 m 3 / h per kW rated power of the steam humidifier 2.

Der Luftstromwächter 14 dient der Gewährleistung einer ausreichenden Verdünnung des in den Fortluftkanal 3 eingeleiteten Abgases des Dampfluftbefeuchters 2 unter allen denkbaren Betriebszuständen des Systems 1, so z.B. auch bei einer Verstopfung eines in der raumlufttechnischen Anlage gegebenenfalls vorgesehenen Luftfilters oder ähnlichem. Es wird mittels des Luftstromwächters 14 sichergestellt, dass nur dann Abgas vom Dampfluftbefeuchter 2 in den Fortluftkanal 3 der raumlufttechnischen Anlage eingeleitet wird, wenn eine genügende Verdünnung des Abgases in der Fortluft durch eine ausreichende Luftstromgeschwindigkeit der Fortluft gewährleistet ist, ohne dass eine gesonderte Überwachung der Qualität der Fortluft erforderlich wäre. Mit der erfindungsgemässen Abgasvorrichtung 7 können bei der Fortluft auch bei Einleitung des Abgases des Dampfluftbefeuchters 2 vorteilhafterweise die sicherheitstechnisch bedingten und gesetzlich vorgeschriebenen Grenzwerte von 1000 ppm Kohlenmonoxid bei Normalbetrieb der raumlufttechnischen Anlage, von 2000 ppm Kohlenmonoxid am Abschalt(zeit)punkt der raumlufttechnischen Anlage und von 5000 ppm Kohlendioxid eingehalten werden.The air flow monitor 14 serves to ensure a sufficient dilution of the introduced into the exhaust duct 3 exhaust gas of the steam humidifier 2 under all conceivable operating conditions of the system 1, for example, even with a blockage in the air conditioning system optionally provided air filter or the like. It is ensured by means of the air flow monitor 14 that only exhaust gas from the steam humidifier 2 in the exhaust air duct 3 of the ventilation system is initiated when a sufficient dilution the exhaust gas in the exhaust air is ensured by a sufficient air flow velocity of the exhaust air, without a separate monitoring of the quality of the exhaust air would be required. With the exhaust device 7 according to the invention, the safety-related and legally prescribed limits of 1000 ppm carbon monoxide during normal operation of the ventilation system, of 2000 ppm carbon monoxide at the shutdown (time) point of the ventilation system and of the exhaust air of the exhaust air humidifier 5000 ppm of carbon dioxide are maintained.

Ferner wird vorzugsweise bei der erfindungsgemässen Abgasvorrichtung 7/dem erfindungsgemässen System 1 der Betriebszustand des Ventilators 4 ebenfalls erfasst und der gasbetriebene Dampfluftbefeuchter 2 in Abhängigkeit von diesem Betriebszustand gesteuert. Die Erfassung des Betriebszustands des Ventilators 4 kann insbesondere über die Erfassung des Schaltzustandes eines nicht dargestellten Freigaberelais des Ventilators 4 erfolgen. Erfolgt ein Stopp bzw. ein Abschalten des Ventilators 4, wird über eine entsprechende Ansteuerung des gasbetriebenen Dampfluftbefeuchters 2 eine sofortige Nachspülung des Dampfluftbefeuchters 2 veranlasst, um die kurz nach Abschalten des Ventilators 4 noch im Fortluftkanal 3 vorhandene Luftströmung auszunutzen. Bei der Nachspülung wird nur der Brenner des für die Nachspülung vollständig offenen Dampfluftbefeuchters 2 betrieben, sodass restliche vorhandene Verschmutzungsbestandteile bzw. Abgase herausgespült und durch die noch im Fortluftkanal 3 vorhandene Luftströmung abgeführt werden.Furthermore, in the inventive exhaust device 7 / the system 1 according to the invention, the operating state of the fan 4 is preferably also detected and the gas-operated steam humidifier 2 is controlled as a function of this operating state. The detection of the operating state of the fan 4 can be done in particular via the detection of the switching state of a release relay, not shown, of the fan 4. If a stop or a shutdown of the fan 4, an immediate rinsing of the steam humidifier 2 is caused by a corresponding control of the gas-operated steam humidifier 2, to exploit the existing shortly after switching off the fan 4 in the exhaust duct 3 air flow. During the final rinse, only the burner of the rinsing air humidifier 2 that is completely open for rinsing is operated, so that any remaining dirt components or exhaust gases are rinsed out and removed by the air flow still present in the exhaust air duct 3.

Weiterhin ist an bzw. in der Abgasleitung 8 ein Differenzdruckwächter 15 vorgesehen, der den in der Abgasleitung 8 herrschenden Druck misst. Der Differenzdruckwächter 15 ist stromauf des Zugbegrenzers 11, d.h. zwischen Zugbegrenzer 11 und Abgasstutzen 9 des Dampfluftbefeuchters 2 angeordnet und zwar vorzugsweise mittig zwischen Zugbegrenzer 11 und Dampfluftbefeuchter 2. Bevorzugt ist der Differenzdruckwächter 15 jedoch nicht näher als 1 m von dem Abgasstutzen 9 angeordnet, sodass ein stationärer Druck (im Wesentlichen ohne Einschwingverhalten) gemessen werden kann. Wie eingangs erwähnt schaltet der Differenzdruckwächter 15 den gasbetriebenen Dampfluftbefeuchter 2 ab, wenn im Betrieb des Dampfluftbefeuchters 2 der gemessene Druckwert einen an dem Differenzdruckwächter 15 eingestellten oberen Druckgrenzwert, insbesondere -20 Pa, überschreitet, da ansonsten der in der Abgasleitung 8 herrschende Unterdruck zu gering ist, um eine ausreichende Abführung des Abgases des Dampfluftbefeuchters 2 über den Fortluftkanal 3 sicherzustellen.Furthermore, a differential pressure switch 15 is provided on or in the exhaust pipe 8, which measures the pressure prevailing in the exhaust pipe 8 pressure. The differential pressure switch 15 is upstream of the draft regulator 11, that is arranged between the draft regulator 11 and the exhaust port 9 of the steam humidifier 2, preferably in the center between draft regulator 11 and steam humidifier 2. Preferably, however, the differential pressure switch 15 is not arranged closer than 1 m from the exhaust port 9, so that a stationary pressure (essentially without transient response) can be measured. As mentioned above, the differential pressure switch 15 switches off the gas-operated steam humidifier 2 when, during operation of the steam humidifier 2, the measured pressure value exceeds an upper pressure limit set at the differential pressure switch 15, in particular -20 Pa, since otherwise the negative pressure prevailing in the exhaust gas line 8 is too low in order to ensure a sufficient discharge of the exhaust gas of the steam humidifier 2 via the exhaust air duct 3.

Ausserdem verhindert der Differenzdruckwächter 15 ein Einschalten des Dampfluftbefeuchters 2, wenn der gemessene Druck einen an dem Differenzdruckwächter 15 eingestellten unteren Druckgrenzwert unterschreitet, da ansonsten bei Einschalten des Brenners dessen Flamme in die Abgasleitung 8 gesaugt werden würde.In addition, the differential pressure switch 15 prevents switching on of the steam humidifier 2 when the measured pressure falls below a set at the differential pressure switch 15 lower pressure limit, otherwise its flame would be sucked into the exhaust pipe 8 when switching on the burner.

Das in den Fortluftkanal 3 eingebrachte Ende der Abgasleitung 8 ist vorzugsweise als Abgasverteileinheit 16 ausgestaltet, wie sie detaillierter in Figur 2 dargestellt ist. Die Abgasverteileinheit 16 ist bevorzugt als sich quer zur Strömungsrichtung im Fortluftkanal 3 erstreckendes Rohr ausgebildet, welches mit mehreren Öffnungen/Löchern/Bohrungen 17 für den Austritt des vom Dampfluftbefeuchter 2 kommenden Abgases in den Fortluftkanal 3 versehen ist. Die Öffnungen 17 sind vorzugsweise gleichmässig über die Länge der Abgasverteileinheit 16 verteilt und weisen in Richtung der Luftströmung im Fortluftkanal 3, sodass die aus der Abgasverteileinheit 16 austretenden Abgase möglichst gleichmässig über die Breite des Fortluftkanals 3 in die Fortluft eingeleitet werden und hierdurch eine gute Durchmischung von Abgas und Fortluft und ein optimale Verdünnung des Abgases in der Fortluft gewährleistet sind. Dadurch, dass die Öffnungen 17 in Richtung der Luftströmung im Fortluftkanal 3 weisen, kann ein negativer Einfluss auf den in der Abgasleitung 7/ Abgasverteileinheit 16 herrschenden Unterdruck vermieden werden.The introduced into the exhaust duct 3 end of the exhaust pipe 8 is preferably designed as Abgasverteileinheit 16, as described in more detail in FIG. 2 is shown. The Abgasverteileinheit 16 is preferably formed as extending transversely to the flow direction in the exhaust duct 3 tube, which is provided with a plurality of openings / holes / holes 17 for the exit of the coming of the steam humidifier 2 exhaust gas in the exhaust duct 3. The openings 17 are preferably evenly distributed over the length of the Abgasverteileinheit 16 and point in the direction of air flow in the exhaust duct 3, so that the exiting the Abgasverteileinheit 16 exhaust gases are introduced as uniformly over the width of the exhaust air duct 3 in the exhaust air and thereby a thorough mixing of Exhaust gas and exhaust air and optimal dilution of the exhaust gas in the exhaust air are ensured. Characterized in that the openings 17 point in the direction of the air flow in the exhaust air duct 3, a negative influence on the pressure prevailing in the exhaust pipe 7 / Abgasverteileinheit 16 negative pressure can be avoided.

Selbstverständlich können über die Höhe der Abgasverteileinheit 16 verteilt mehrere Reihen aus in Querrichtung gleichmässig verteilten Öffnungen 17 vorgesehen sein, wobei die mehreren Reihen vorzugsweise in Querrichtung versetzt zueinander angeordnet sind, um die gleichmässige Verteilung des Abgases in der Fortluft weiter zu fördern. Je grösser die Nennleistung des gasbetriebenen Dampfluftbefeuchters 2 ist, desto mehr Reihen von Öffnungen 17 sind vorzugsweise vorgesehen und/oder desto grösser ist vorzugsweise der Durchmesser der einzelnen Öffnungen 17.Of course, distributed over the height of the Abgasverteileinheit 16 a plurality of rows of transversely uniformly distributed openings 17 may be provided, wherein the plurality of rows are preferably arranged offset in the transverse direction to each other to further promote the uniform distribution of the exhaust gas in the exhaust air. The greater the nominal power of the gas-operated steam humidifier 2, the more rows of openings 17 are preferably provided and / or the larger is preferably the diameter of the individual openings 17.

Beispielhafte Messungen an dem erfindungsgemässen System 1, wobei als gasbetriebener Dampfluftbefeuchter 2 der Dampfluftbefeuchter GS-80 kg/h des Unternehmens Condair AG und als Fortluftkanal 3 ein Monoblock mit einer Durchtrittsfläche von 1070 mm x 1070 mm und mit einem Luftstromgeschwindigkeit von 19372 m3/h eingesetzt wurden, ergaben bei einem konstanten, im Fortluftkanal 3 herrschenden Unterdruck von -400 Pa am Abgasstutzen 9 einen Kohlendioxidgehalt von 9.5 % und 10 cm stromab der Abgasverteileinheit 16 im Fortluftkanal 3 einen Kohlendioxidgehalt von nur noch 2.4 %. Messungen, die mehr als 1 m nach der Abgasverteileinheit 16 durchgeführt worden waren, führten aufgrund der durch die erfindungsgemässe Abgasvorrichtung 7 erreichte Verdünnung des Abgases in der Fortluft vorteilhafterweise zu keinen brauchbaren Messwerten für den Kohlendioxidgehalt.Exemplary measurements on the system 1 according to the invention, the steam humidifier GS-80 kg / h from Condair AG being used as the gas-operated steam humidifier 2 and the exhaust duct 3 being a monoblock having a passage area of 1070 mm × 1070 mm and an air flow speed of 19372 m 3 / h were used at a constant, prevailing in the exhaust duct 3 negative pressure of -400 Pa at the exhaust port 9 a carbon dioxide content of 9.5% and 10 cm downstream of the Abgasverteileinheit 16 in the exhaust duct 3 a carbon dioxide content of only 2.4%. Measurements which were carried out more than 1 m after the exhaust gas distribution unit 16 advantageously did not lead to any useful measurements of the carbon dioxide content due to the dilution of the exhaust gas in the exhaust air achieved by the exhaust gas device 7 according to the invention.

Mit der erfindungsgemässen Abgasvorrichtung lassen sich somit auf sicherheitstechnisch zulässige Weise Abgase einer Feuerungsanlage, z.B. in Form eines gasbetriebenen Dampfluftbefeuchters, auf effiziente Weise über den Fortluftkanal einer raumlufttechnischen Anlage ins Freie abführen.Thus, with the exhaust device according to the invention, exhaust gases of a combustion plant, e.g. in the form of a gas-operated steam humidifier, efficiently dissipate into the open air via the exhaust duct of a ventilation and air conditioning system.

Claims (5)

  1. System comprising a firing installation (2) and a ventilation installation with an exhaust channel (3) and an exhaust device (7), wherein the exhaust device is adapted to introduce exhaust gas of the firing installation (2) into the exhaust channel (3) of the ventilation installation and has an exhaust pipe (8), wherein the exhaust pipe (8) of the exhaust device (7) is coupled at an end to an exhaust socket (9) of the firing installation (2) and is introduced with its other end upstream of a fan (4) of the ventilation installation into the exhaust channel (3) of the ventilation installation and the exhaust device comprises
    - a throttle valve (10) arranged inside the exhaust pipe (8) for adjusting the pressure operation range of the firing installation (2),
    - a draught limiter (11) arranged inside the exhaust pipe (8) upstream of the throttle valve (10) for stabilizing the pressure in the exhaust pipe (8), characterized in that the exhaust device
    - has an air flow monitor (14) arranged in the exhaust channel (3) of the ventilation installation for determining the air flow speed present in the exhaust channel (3) and for controlling the firing installation (3) depending on the determined air flow speed, and in that the exhaust device
    - comprises a differential pressure monitor (15) for determining the pressure present in the exhaust pipe (8) and for controlling the firing installation (2) depending on the determined pressure, wherein the differential pressure monitor (15) is arranged at the exhaust pipe (8) upstream of the draught limiter (11).
  2. System according to claim 1, characterized in that an exhaust distribution unit (16) is provided at the exhaust device at the end of the exhaust pipe (8) provided for introduction into the exhaust channel (3) of the ventilation installation, which is formed as a tube extending obliquely to the exhaust flow direction and has multiple openings (17) for the gas exhaust.
  3. Method for operating a system according to claim 1, characterized in that
    - the air flow speed in the exhaust channel (3) of the ventilation installation is determined by means of the air flow monitor (14),
    - the determined value of the air flow speed is compared to a preset air flow speed threshold value by means of the air flow monitor (14), and
    - the firing installation (2) is switched off by means of the air flow monitor (14) if the determined value of the air flow speed falls below the preset air flow speed threshold value.
  4. Method according to claim 3, characterized in that the pressure present in the exhaust pipe (8) is determined by means of the differential pressure monitor (15) which is arranged at the exhaust pipe (8) of the exhaust device (7) upstream of the draught limiter (11), wherein the determined pressure value is compared with a preset upper pressure threshold value by means of the differential pressure monitor (15) and the firing installation (2) is switched off by means of the differential pressure monitor (15) if the determined pressure value exceeds the upper pressure threshold value.
  5. Method according to claim 4, characterized in that the determined pressure value is compared with a preset lower pressure threshold value by means of the differential pressure monitor (15) and the firing installation (2) is kept in the switched off state by means of the differential pressure monitor (15) if the determined pressure value falls below the lower pressure threshold value.
EP12005270.9A 2012-07-18 2012-07-18 System comprising an exhaust device and method for operating such a system Active EP2687784B1 (en)

Priority Applications (2)

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EP12005270.9A EP2687784B1 (en) 2012-07-18 2012-07-18 System comprising an exhaust device and method for operating such a system
PL12005270T PL2687784T3 (en) 2012-07-18 2012-07-18 System comprising an exhaust device and method for operating such a system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12005270.9A EP2687784B1 (en) 2012-07-18 2012-07-18 System comprising an exhaust device and method for operating such a system

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EP2687784A1 EP2687784A1 (en) 2014-01-22
EP2687784B1 true EP2687784B1 (en) 2017-08-02

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Publication number Priority date Publication date Assignee Title
NL1016049C2 (en) * 2000-08-30 2002-03-01 Gastec Nv Device for connecting exhaust gases from a gas consumption appliance and a ventilation system with or without connection to a heat-recovery unit.
US20120083194A1 (en) * 2003-03-06 2012-04-05 Enervex, Inc. Mechanical draft systems
US20110203569A1 (en) * 2010-02-23 2011-08-25 John Robert Weimer Boiler system stabilizing damper and flue control method

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PL2687784T3 (en) 2018-01-31

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