EP2937116A1 - Reduction of noise and positive air pressure when discharging a gas extinguisher system - Google Patents
Reduction of noise and positive air pressure when discharging a gas extinguisher system Download PDFInfo
- Publication number
- EP2937116A1 EP2937116A1 EP14165943.3A EP14165943A EP2937116A1 EP 2937116 A1 EP2937116 A1 EP 2937116A1 EP 14165943 A EP14165943 A EP 14165943A EP 2937116 A1 EP2937116 A1 EP 2937116A1
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- EP
- European Patent Office
- Prior art keywords
- extinguishing
- gas
- pressure
- flow rate
- control device
- 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.)
- Granted
Links
- 230000009467 reduction Effects 0.000 title claims description 21
- 238000007599 discharging Methods 0.000 title claims 2
- 239000007789 gas Substances 0.000 claims abstract description 71
- 239000012530 fluid Substances 0.000 claims abstract description 49
- 239000012071 phase Substances 0.000 claims abstract description 19
- 230000007704 transition Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000003380 propellant Substances 0.000 claims abstract description 13
- 239000007792 gaseous phase Substances 0.000 claims abstract description 10
- 239000007791 liquid phase Substances 0.000 claims abstract description 9
- 238000010791 quenching Methods 0.000 claims abstract description 9
- 230000007423 decrease Effects 0.000 claims abstract description 7
- 230000000171 quenching effect Effects 0.000 claims abstract description 7
- 239000003570 air Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000012080 ambient air Substances 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- -1 hydrogen halides Chemical class 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 description 7
- 239000008186 active pharmaceutical agent Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- YFMFNYKEUDLDTL-UHFFFAOYSA-N 1,1,1,2,3,3,3-heptafluoropropane Chemical compound FC(F)(F)C(F)C(F)(F)F YFMFNYKEUDLDTL-UHFFFAOYSA-N 0.000 description 1
- 229920004449 Halon® Polymers 0.000 description 1
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- 230000001419 dependent effect Effects 0.000 description 1
- 150000005826 halohydrocarbons Chemical class 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
- A62C35/023—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/58—Pipe-line systems
- A62C35/68—Details, e.g. of pipes or valve systems
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
- A62C99/0027—Carbon dioxide extinguishers
Definitions
- Gas extinguishing systems and extinguishing methods are known from the prior art, in which an extinguishing fluid is conducted from a pressure vessel via a container valve and line system to one or more extinguishing nozzles during the discharge.
- the extinguishing fluid stored in the pressure vessel has an extinguishing liquid and a propellant gas.
- the extinguishing liquid is preferably a chemical extinguishing liquid. It is particularly based on halohydrocarbons (halons), e.g. on HFC-227ea or HFC-23, or on fluorinated ketones, e.g. on FK-5-1-12 sold under the trade name Novec® 1230.
- the propellant gas is preferably an inert gas such as nitrogen or argon, or carbon dioxide.
- the extinguishing fluid is present in the line system at the beginning of the discharge mainly in the liquid phase.
- the extinguishing fluid in the line system in a mainly gaseous phase.
- mainly is meant a volume fraction of the respective phase over the other phase of more than 90%. In terms of time of the phase transition, this is the period in which the propellant gas in the pressure vessel promotes the local extinguishing liquid from the pressure vessel or "squeezes out” until ultimately only the propellant gas is present in the pressure vessel.
- This residual propellant gas also empties via the connected line system and on via the nozzles to the typically depressurized state.
- the mass flow or mass flow is reduced or stopped.
- noise-sensitive components e.g. magnetic hard disks
- Another advantage is that pressure compensation flaps in protected rooms, which are opened in the event of triggering a gas extinguishing system to reduce the pressure in the room to minimize building damage and personal injury, can now be sized smaller. The structural and cost expenditure is reduced.
- the flow rate is reduced so that the noise level of the resulting noise is limited to a maximum value of 100 dB.
- the flow rate is reduced in such a way that the ambient air pressure is limited to an overpressure value in a range of 200 to 1000 Pa.
- the room air pressure is based on the prevailing in the vicinity of the gas extinguishing system atmospheric atmospheric pressure as a reference level. It normally corresponds, i. in the non-triggered state of the gas extinguishing system, the ambient air pressure.
- the (active) reduction of the flow rate is timed.
- the reduction takes place via a timer with a predetermined delay time, e.g. by means of a time relay.
- a timer Triggered by a trigger signal of the gas extinguishing system, this can be used to trigger a throttle or a reducing valve in the line system of the gas extinguishing system, at least indirectly, in order to reduce the mass flow of the extinguishing fluid.
- the timer can also be realized pneumatically or hydraulically, as well as the control of the throttle.
- the adjustable delay time is preferably in the range of 5 to 15 seconds, in particular in the range of 7 to 10 seconds.
- the mass flow reduction may also be line pressure controlled, e.g. by means of a pressure sensor for detecting the line pressure.
- the mass flow reduction may also be ambient air pressure controlled, i. controlled by the prevailing in the gas extinguishing system air pressure, take place, such. by means of an air pressure sensor or differential pressure sensor. If the room air pressure exceeds a predetermined overpressure value, such as a pressure value of 200 Pa, so the control of the throttle takes place to reduce the flow rate.
- a predetermined overpressure value such as a pressure value of 200 Pa
- the mass flow reduction may also be noise controlled, e.g. through a microphone or a structure-borne sound sensor.
- the mass flow reduction can continue alternatively or additionally via the current level of the pressure vessel.
- a level gauge be arranged, such as a float.
- the level gauge can also be an ultrasonic level gauge.
- the mass flow reduction can be done via the current weight of the pressure vessel, which decreases with increasing discharge of the pressure vessel.
- the current weight of the container may be determined by means of a weighing device, such as a weighing device. by means of a balance or load cell.
- the mass flow reduction can take place via a metrologically measured value for the mass flow, such as, for example, by means of a flow meter, a volumetric flow meter or a mass flow meter.
- a metrologically measured value for the mass flow such as, for example, by means of a flow meter, a volumetric flow meter or a mass flow meter.
- such measuring devices can detect the flow rate on the basis of a rotating impeller or a fluid pressure dropping along a measuring path.
- the measurement can also be made by optical means, e.g. based on the change in the refractive index in the liquid and gaseous phase, or by means of ultrasound.
- the reduction of the flow rate takes place in one stage.
- a particularly simple realization of the flow rate of the extinguishing fluid is possible.
- a two-stage or generally a multi-stage reduction of the flow rate is conceivable.
- the object of the invention is further achieved by a gas extinguishing system which has at least one pressure vessel for the pressure storage of an extinguishing fluid.
- the extinguishing fluid has an extinguishing liquid and a propellant gas.
- the respective pressure vessel is connected via a container valve or via a container valve release to a line system at least one extinguishing nozzle.
- the conduit system may include conduits, headers and / or pressure hoses.
- the gas extinguishing system has a trigger for opening the respective container valve in order to discharge the extinguishing fluid into the line system.
- all container valves have a trigger.
- the trigger on the first tank valve is controlled by the fire panel.
- the remaining triggers are then preferably driven together by the first open pressure vessel.
- the trigger can be an electrically, pneumatically or hydraulically controllable trigger, which is mechanically connected to the respective container valve for opening.
- the gas extinguishing system also includes a throttle or reducing valve, which is arranged in the line system.
- the throttle can be controlled via a control device of the gas extinguishing system for (further active) reducing or also for stopping the extinguishing fluid flow rate.
- the control device is designed to control the throttle during the phase transition from a mainly liquid phase into a mainly gaseous phase.
- the quenching fluid flow rate is reduced. If there is already a reduction in the mass flow due to the phase transition of the extinguishing fluid from the mainly liquid phase into the mainly gaseous phase, then the mass flow is actively further reduced by the activation of the throttle.
- the throttle for reducing the mass flow in the pipe system is dimensioned such that the sound level of the resulting noise can be limited to a maximum value of 100 dB. This can e.g. as part of a type test of such a gas extinguishing system. As part of the design, e.g. Perforated diaphragms with different flow diameters can be tested.
- the throttle is dimensioned such that the ambient air pressure can be limited to an overpressure value in a range of 200 to 1000 Pa.
- the design can also be done so that both the aforementioned maximum sound level value as well as the overpressure value are maintained.
- the control device of the gas extinguishing system may e.g. a triggerable time delay, i. a so-called timer.
- the control device for this purpose has an external electrical input for triggering the time delay element.
- the time delay element can then be triggered by the trigger, by an upstream fire panel or by a manually triggerable reset button to control the throttle.
- the trigger, the fire alarm panel as well as the extinguishing switch can then be connected to the electrical trigger input as a switching input of the control device.
- the control device can also have a first pressure sensor for detecting the line pressure in the line system of the gas extinguishing system and / or a second pressure sensor for detecting the ambient air overpressure in a region of the gas extinguishing system remote from the extinguishing nozzles.
- a first pressure sensor for detecting the line pressure in the line system of the gas extinguishing system
- a second pressure sensor for detecting the ambient air overpressure in a region of the gas extinguishing system remote from the extinguishing nozzles.
- control device has a microphone for detecting the noise in the area of the gas extinguishing system and / or a structure-borne noise sensor attached to components of the gas extinguishing system for detecting structure-borne noise.
- the control device may further comprise a mass flow meter for detecting the extinguishing fluid flow rate flowing in the line system.
- the mass flow meter can be arranged in the flow direction of the extinguishing fluid before the throttle or after the throttle.
- control device and the throttle are combined to form a structural unit.
- the control device has hydrodynamic and / or hydrostatic acting Components for actuating the throttle on.
- the assembly of control device and throttle can also be "electronics-free", that is, be implemented without electrical components, such as by the use of mechanical, hydraulic and / or pneumatic components.
- the extinguishing fluid has a chemically acting extinguishing liquid based on hydrogen halides and an inert gas, such as nitrogen or argon, or carbon dioxide as a propellant gas.
- an inert gas such as nitrogen or argon, or carbon dioxide as a propellant gas.
- FIG. 1 shows by way of example the time course of the occurring during the discharge of a gas extinguishing system noise and room air pressure according to the prior art.
- the registered room air pressure p R is based on the prevailing in the environment of the gas extinguishing system atmospheric atmospheric pressure as a reference level and typically has approximately the pressure value 0 Pa in the unresolved case of the gas extinguishing system.
- the phase transition is ideally illustrated in the present example as time t1. In practice, the phase transition takes place within a few seconds. In the present example, the maximum sound level value L Max at time t2 is just over 110 dB. Such sound level values are highly critical to the proper operation of magnetic drives in data centers.
- FIG. 2 shows by way of example the time course of the occurring during the discharge of a gas extinguishing system reduced noise and room air pressure by active reduction of the extinguishing fluid flow rate ⁇ according to the inventive method.
- the mass flow rate ⁇ is reduced.
- FIG. 3 shows an example of a gas extinguishing system A according to the invention with a throttle arranged in the line LS throttle DR, which via a control device SV for reducing or Stopping the quenching fluid flow rate is controlled.
- a control device SV for reducing or Stopping the quenching fluid flow rate is controlled.
- At the output end of the line system LS only one extinguishing nozzle D is shown by way of example. The latter is the actual source of the noise and the increase in ambient or ambient pressure.
- the gas extinguishing system A comprises, by way of example only, a single pressure vessel B for the pressure storage of an extinguishing fluid F.
- the latter comprises an extinguishing liquid L, such as e.g. Novec® 1230, and a propellant G, e.g. Nitrogen, up.
- the pressure vessel B is connected via a container valve BV to the line system LS and to the extinguishing nozzle D.
- the gas extinguishing system A further has a trigger AL for opening the container valve BV in order to discharge the extinguishing fluid F into the line system LS.
- the trigger AL is triggered by a fire panel BMZ.
- a throttle DR is arranged in the line system LS, which can be controlled via a control device SV for reducing or stopping the quenching fluid flow rate.
- the control device SV is designed to control the throttle DR during the phase transition of the extinguishing fluid F from a mainly liquid phase into a mainly gaseous phase.
- the detection of the phase transition can be e.g. sensory, i. by means of sensors.
- the phase transition can also be considered as established after a predetermined delay time has elapsed after triggering of the gas extinguishing system A.
- FIG. 4 shows an example of an inventive gas extinguishing system A according to a first embodiment.
- the gas extinguishing system A more pressure vessel B.
- the left pressure vessel B is connected via a container valve BV and a pressure hose DS to the line system LS.
- the container valve BV is thereby triggered in the case of release by a trigger AL to open.
- the other two are each a container valve release BVA and via a respective pressure hose DS to a common manifold SR connected.
- the two right-hand container valve actuators BVA are triggered jointly by the upstream container valve BV of the left-hand pressure vessel B.
- Both the pressure hoses DS, common manifold SR and the pipe R for connecting the manifold SR with the extinguishing nozzle D are components of the line system LS.
- control device SV which has only a pressure sensor S1 for detecting the line pressure, and the throttle DR combined to form a unit BE.
- the control device SV can have (exclusively) mechanical, hydrodynamic and / or hydrostatic-acting components for actuating the throttle DR, such as a pressure switch S1 as a pressure sensor which mechanically changes its switching state when it falls below a predetermined pressure value.
- the control device SV and the throttle DR can be used as a unit BE, e.g. a common flow flap or a common flow valve, which at the phase transition of the extinguishing fluid F preferably invariably folds over or jump over or snap over, and consequently reduces the flow cross section for the extinguishing fluid F.
- This assembly BE can also be designed so that the flow flap or the flow valve after unloading the gas extinguishing system A can be reset again.
- FIG. 5 shows an example of an inventive gas extinguishing system A according to another embodiment.
- various embodiments of the control device SV are shown together in a figure.
- the control device SV on a switching logic SL, which may be realized for example by a processor-based control computer.
- the switching logic SL may alternatively comprise one or more switching relays or threshold switches with a preferably potential-free switching contact.
- the switching logic SL controls to reduce of the mass flow ⁇ the throttle DR.
- the latter is an electrically controllable throttle in the example shown.
- the control device SV can have only one of the detectors or sensors S1, S2, M, KS, MM shown for detecting the phase transition from the mainly liquid phase of the extinguishing fluid F into the mainly gaseous phase.
- these may be OR-linked by the switching logic, so that in terms of time the first incoming input signal upon detection of the phase transition or the time-delayed signal from the time delay TIMER is decisive for the control of the throttle DR.
- the control device SV as one of a plurality of sensors, has a first pressure sensor S1 for detecting the line pressure p L in the line system LS of the gas extinguishing system A.
- the control device SV signal or data technology can be connected to this pressure sensor S1. If a detected line pressure value falls below a predeterminable comparison value, the control of the throttle DR takes place.
- control device SV may have a second pressure sensor S2 for detecting the room air overpressure p R in the area of the gas extinguishing system A or may be connected to it by signal or data technology. If a detected room air overpressure value exceeds a predefinable comparison value, the control of the throttle DR takes place.
- the control device SV can also alternatively or additionally a microphone M for detecting the noise in the area include the gas extinguishing system A or be connected by signal or data technology to this. If a detected noise level value exceeds a predefinable comparison value, the control of the throttle DR takes place.
- control device may have a structure-borne sound sensor KS attached to components of the gas extinguishing system A for detecting structure-borne noise or may be connected to it by signal or data technology, such as, for example, on a pipe of the pipe system LS. Exceeds a detected structure-borne noise level value a predetermined reference value, the control of the throttle DR takes place.
- a structure-borne sound sensor KS attached to components of the gas extinguishing system A for detecting structure-borne noise or may be connected to it by signal or data technology, such as, for example, on a pipe of the pipe system LS.
- Exceeds a detected structure-borne noise level value a predetermined reference value the control of the throttle DR takes place.
- control device SV may have a mass flow meter MM for detecting the extinguishing fluid flow rate fl flowing in the line system LS. If a detected value for the extinguishing fluid flow rate ⁇ falls below a predeterminable comparison value, the control of the throttle DR takes place.
- the control device SV may alternatively or additionally be connected to a level indicator FM of a pressure vessel B signal or data technology. If a detected fill level value falls below a predeterminable comparison value, the control of the throttle DR takes place.
- control device SV can also have a weighing device W, such as a balance or a load cell, or be connected to this signal or data technology. If a detected weight value falls below a predetermined comparison value, the control of the throttle DR also takes place here.
- a weighing device W such as a balance or a load cell
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Measuring Volume Flow (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur Reduktion von Lärm und Raumluftüberdruck beim Entladen einer Gaslöschanlage (A), wobei während der Entladung aus einem Druckbehälter (B) ein Löschfluid (F) über ein Behälterventil (V) und Leitungssystem (LS) zu einer Löschdüse (D) geführt wird. Das im Druckbehälter gespeicherte Löschfluid weist eine Löschflüssigkeit (L) und ein Treibgas (G) auf, wobei das Löschfluid im Leitungssystem (LS) zu Beginn der Entladung hauptsächlich in flüssiger Phase vorliegt und dann nach Austragung der Löschflüssigkeit in eine hauptsächlich gasförmige Phase übergeht. Es wird in einem Phasenübergangsbereich (T), der mit einer signifikanten Abnahme des Löschfluid-Mengenstroms ( m ) und einem signifikanten Anstieg des Lärms und des Raumluftdrucks (p R ) einhergeht, dann der Mengenstrom reduziert oder gestoppt. Die Erfindung betrifft zudem eine korrespondierende Gaslöschanlage.The invention relates to a method for reducing noise and positive air pressure when unloading a gas extinguishing system (A), wherein during discharge from a pressure vessel (B) an extinguishing fluid (F) via a container valve (V) and line system (LS) to a quenching nozzle (D ) to be led. The extinguishing fluid stored in the pressure vessel has an extinguishing liquid (L) and a propellant gas (G), wherein the extinguishing fluid is present in the line system (LS) at the beginning of the discharge mainly in the liquid phase and then passes after discharge of the extinguishing liquid in a mainly gaseous phase. Then, in a phase transition region (T) accompanied by a significant decrease in the quench fluid flow (m) and a significant increase in noise and air pressure (p R), the flow is reduced or stopped. The invention also relates to a corresponding gas extinguishing system.
Description
Aus dem Stand der Technik sind Gaslöschanlagen und Löschverfahren bekannt, bei denen während der Entladung ein Löschfluid aus einem Druckbehälter über ein Behälterventil und Leitungssystem zu einer oder mehreren Löschdüsen geführt wird. Das im Druckbehälter gespeicherte Löschfluid weist eine Löschflüssigkeit und ein Treibgas auf. Die Löschflüssigkeit ist vorzugsweise eine chemisch wirkende Löschflüssigkeit. Sie basiert insbesondere auf Halogenkohlenwasserstoffen (Halone), wie z.B. auf HFC-227ea oder HFC-23, oder auf fluorierten Ketonen, wie z.B. auf FK-5-1-12, das unter dem Markennamen Novec® 1230 vertrieben wird. Das Treibgas ist vorzugsweise ein Inertgas wie Stickstoff oder Argon, oder Kohlenstoffdioxid.Gas extinguishing systems and extinguishing methods are known from the prior art, in which an extinguishing fluid is conducted from a pressure vessel via a container valve and line system to one or more extinguishing nozzles during the discharge. The extinguishing fluid stored in the pressure vessel has an extinguishing liquid and a propellant gas. The extinguishing liquid is preferably a chemical extinguishing liquid. It is particularly based on halohydrocarbons (halons), e.g. on HFC-227ea or HFC-23, or on fluorinated ketones, e.g. on FK-5-1-12 sold under the trade name Novec® 1230. The propellant gas is preferably an inert gas such as nitrogen or argon, or carbon dioxide.
Das Löschfluid liegt im Leitungssystem zu Beginn der Entladung hauptsächlich in flüssiger Phase vor. Nach Austragung der Löschflüssigkeit geht dann das Löschfluid im Leitungssystem in eine hauptsächlich gasförmige Phase über. Mit "hauptsächlich" ist hier ein Volumenanteil der jeweiligen Phase gegenüber der anderen Phase von mehr als 90% gemeint. In zeitlicher Hinsicht des Phasenübergangs ist dies der Zeitraum, in dem das Treibgas im Druckbehälter die dortige Löschflüssigkeit aus dem Druckbehälter fördert bzw. "hinauspresst", bis letztendlich nur noch das Treibgas im Druckbehälter vorhanden ist. Auch dieses restliche Treibgas entleert sich über das angeschlossene Leitungssystem und weiter über die Düsen bis zum typischerweise drucklosen Zustand.The extinguishing fluid is present in the line system at the beginning of the discharge mainly in the liquid phase. After discharge of the extinguishing liquid then the extinguishing fluid in the line system in a mainly gaseous phase. By "mainly" is meant a volume fraction of the respective phase over the other phase of more than 90%. In terms of time of the phase transition, this is the period in which the propellant gas in the pressure vessel promotes the local extinguishing liquid from the pressure vessel or "squeezes out" until ultimately only the propellant gas is present in the pressure vessel. This residual propellant gas also empties via the connected line system and on via the nozzles to the typically depressurized state.
Bekannt ist auch, dass beim Auslösen und während der Entladung einer solchen Gaslöschanlage Lärmpegel bis zu 110 dB und mehr auftreten können. Befinden sich in geschützten Räumen, wie z.B. in Datencentern, die mit einer solchen Gaslöschanlage verbunden sind, magnetische Festplatten, so ist bekannt, dass diese ab Lärmpegel von mehr als 100 dB beeinträchtigt werden und zum Teil auch ausfallen können.It is also known that when triggered and during the discharge of such a gas extinguishing system noise levels up to 110 dB and more can occur. Are in protected areas, such as in data centers, which are connected to such a gas extinguishing system, magnetic hard disks, it is known that these are affected by noise levels of more than 100 dB and can sometimes fail.
Ausgehend von dem eingangs genannten Stand der Technik ist es eine Aufgabe der Erfindung, ein Verfahren anzugeben, welches den Lärm und Raumluftüberdruck reduziert.Based on the above-mentioned prior art, it is an object of the invention to provide a method which reduces the noise and room air pressure.
Die Aufgabe wird mit den Gegenständen des Hauptanspruchs gelöst. Vorteilhafte Ausführungsformen der vorliegenden Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved with the objects of the main claim. Advantageous embodiments of the present invention are indicated in the dependent claims.
Erfindungsgemäss wird in einem Phasenübergangsbereich, der mit einer signifikanten Abnahme des Löschfluid-Mengenstroms und einem signifikanten Anstieg des Lärms und des Raumluftdrucks einhergeht, der Mengenstrom bzw. der Massenstrom reduziert oder gestoppt.According to the invention, in a phase transition region that is accompanied by a significant decrease in the quench fluid flow rate and a significant increase in noise and in the room air pressure, the mass flow or mass flow is reduced or stopped.
Dadurch wird vorteilhaft wirksam die weitere Zunahme von Lärm wirksam reduziert, sodass lärmsensitive Komponenten, wie z.B. magnetische Festplatten, im Bereich der Löschdüsen nicht beeinträchtigt werden.This advantageously effectively effectively reduces the further increase in noise, so that noise-sensitive components, e.g. magnetic hard disks, in the area of the extinguishing nozzles are not affected.
Ein weiterer Vorteil ist, dass Druckausgleichsklappen in geschützten Räumen, welche im Falle der Auslösung einer Gaslöschanlage zur Reduzierung des Raumüberdrucks geöffnet werden, um Gebäude- und Personenschäden zu minimieren, nun kleiner dimensioniert werden können. Der bauliche sowie kostenmässige Aufwand reduziert sich.Another advantage is that pressure compensation flaps in protected rooms, which are opened in the event of triggering a gas extinguishing system to reduce the pressure in the room to minimize building damage and personal injury, can now be sized smaller. The structural and cost expenditure is reduced.
Nach einer Verfahrensvariante wird der Mengenstrom derart reduziert, dass der Schallpegel des entstehenden Lärms auf einen Wert von maximal 100 dB begrenzt.According to a variant of the method, the flow rate is reduced so that the noise level of the resulting noise is limited to a maximum value of 100 dB.
Einer Verfahrensvariante zufolge wird der Mengenstrom derart reduziert, dass der Raumluftüberdruck auf einen Überdruckwert in einem Bereich von 200 bis 1000 Pa begrenzt wird.According to a variant of the method, the flow rate is reduced in such a way that the ambient air pressure is limited to an overpressure value in a range of 200 to 1000 Pa.
Dadurch wird das Schädigungsrisiko von Personen, die sich in geschützten Räumen befinden, vorteilhaft minimiert. Der Raumluftüberdruck ist dabei auf den in der Umgebung der Gaslöschanlage herrschenden atmosphärischen Normaldruck als Bezugsniveau bezogen. Es entspricht im Normalfall, d.h. im nicht ausgelösten Zustand der Gaslöschanlage, dem Umgebungsluftdruck.This advantageously minimizes the risk of damage to persons in protected areas. The room air pressure is based on the prevailing in the vicinity of the gas extinguishing system atmospheric atmospheric pressure as a reference level. It normally corresponds, i. in the non-triggered state of the gas extinguishing system, the ambient air pressure.
Vorzugsweise erfolgt die (aktive) Reduzierung des Mengenstroms zeitgesteuert. In diesem Fall erfolgt die Reduzierung über ein Zeitglied mit einer vorgegebenen Verzögerungszeit, wie z.B. mittels eines Zeitrelais. Über dieses kann zumindest mittelbar getriggert durch ein Auslösesignal der Gaslöschanlage eine Drossel bzw. ein Reduzierventil im Leitungssystem der Gaslöschanlage angesteuert werden, um den Mengenstrom des Löschfluids zu reduzieren. Das Zeitglied kann auch pneumatisch oder hydraulisch realisiert sein, ebenso wie die Ansteuerung der Drossel. Die einstellbare Verzögerungszeit liegt vorzugsweise im Bereich von 5 bis 15 Sekunden, insbesondere in einem Bereich von 7 bis 10 Sekunden.Preferably, the (active) reduction of the flow rate is timed. In this case, the reduction takes place via a timer with a predetermined delay time, e.g. by means of a time relay. Triggered by a trigger signal of the gas extinguishing system, this can be used to trigger a throttle or a reducing valve in the line system of the gas extinguishing system, at least indirectly, in order to reduce the mass flow of the extinguishing fluid. The timer can also be realized pneumatically or hydraulically, as well as the control of the throttle. The adjustable delay time is preferably in the range of 5 to 15 seconds, in particular in the range of 7 to 10 seconds.
Die Mengenstromreduzierung kann auch leitungsdruckgesteuert erfolgen, wie z.B. mittels eines Drucksensors zur Erfassung des Leitungsdrucks.The mass flow reduction may also be line pressure controlled, e.g. by means of a pressure sensor for detecting the line pressure.
Die Mengenstromreduzierung kann auch umgebungsluftdruckgesteuert, d.h. gesteuert über den in der Gaslöschanlage vorherrschenden Raumluftdruck, erfolgen, wie z.B. mittels eines Luftdrucksensors oder Differenzdrucksensors. Überschreitet der Raumluftüberdruck einen vorgegebenen Überdruckwert, wie z.B. einen Druckwert von 200 Pa, so erfolgt die Ansteuerung der Drossel zur Reduzierung des Mengenstroms.The mass flow reduction may also be ambient air pressure controlled, i. controlled by the prevailing in the gas extinguishing system air pressure, take place, such. by means of an air pressure sensor or differential pressure sensor. If the room air pressure exceeds a predetermined overpressure value, such as a pressure value of 200 Pa, so the control of the throttle takes place to reduce the flow rate.
Die Mengenstromreduzierung kann auch lärmgesteuert erfolgen, wie z.B. durch ein Mikrophon oder einen Körperschallsensor.The mass flow reduction may also be noise controlled, e.g. through a microphone or a structure-borne sound sensor.
Die Mengenstromreduzierung kann weiterhin alternativ oder zusätzlich über den aktuellen Füllstand des Druckbehälters erfolgen. In diesem Fall kann im Druckbehälter ein Füllstandsmesser angeordnet sein, wie z.B. ein Schwimmer. Der Füllstandsmesser kann auch ein Ultraschall-Füllstandsmesser sein.The mass flow reduction can continue alternatively or additionally via the current level of the pressure vessel. In this case, in the pressure vessel, a level gauge be arranged, such as a float. The level gauge can also be an ultrasonic level gauge.
Weiterhin kann die Mengenstromreduzierung über das aktuelle Gewicht des Druckbehälters erfolgen, welches mit zunehmender Entladung des Druckbehälters abnimmt. Das aktuelle Gewicht des Behälters kann mittels einer Wiegevorrichtung, wie z.B. mittels einer Waage oder Kraftmessdose, gemessen werden.Furthermore, the mass flow reduction can be done via the current weight of the pressure vessel, which decreases with increasing discharge of the pressure vessel. The current weight of the container may be determined by means of a weighing device, such as a weighing device. by means of a balance or load cell.
Weiterhin alternativ oder zusätzlich kann die Mengenstromreduzierung über einen messtechnisch erfassten Wert für den Mengenstrom erfolgen, wie z.B. mittels eines Durchflussmessers, eines Volumenstrommessers oder eines Massenstrommessers. Derartige Messgeräte können in technologischer Hinsicht den Durchfluss auf Basis eines sich drehenden Flügelrades oder eines entlang einer Messstrecke abfallenden Fluiddrucks erfassen. Die Messung kann auch auf optischem Wege, wie z.B. auf Basis der Änderung des Brechungsindex bei flüssiger und gasförmiger Phase, oder mittels Ultraschall erfolgen.As an alternative or in addition, the mass flow reduction can take place via a metrologically measured value for the mass flow, such as, for example, by means of a flow meter, a volumetric flow meter or a mass flow meter. Technologically, such measuring devices can detect the flow rate on the basis of a rotating impeller or a fluid pressure dropping along a measuring path. The measurement can also be made by optical means, e.g. based on the change in the refractive index in the liquid and gaseous phase, or by means of ultrasound.
Nach einer Verfahrensvariante erfolgt die Reduzierung des Mengenstroms einstufig. Dadurch ist eine besonders einfache Realisierung des Mengenstroms des Löschfluids möglich. Alternativ ist auch eine zweistufige oder allgemein eine mehrstufige Reduzierung des Mengenstroms vorstellbar.According to a variant of the method, the reduction of the flow rate takes place in one stage. As a result, a particularly simple realization of the flow rate of the extinguishing fluid is possible. Alternatively, a two-stage or generally a multi-stage reduction of the flow rate is conceivable.
Die Aufgabe der Erfindung wird weiterhin durch eine Gaslöschanlage gelöst, die zumindest einen Druckbehälter zur Druckbevorratung eines Löschfluids aufweist. Das Löschfluid weist eine Löschflüssigkeit und ein Treibgas auf. Der jeweilige Druckbehälter ist über ein Behälterventil oder über einen Behälterventilauslöser an ein Leitungssystem an zumindest einer Löschdüse angeschlossen. Das Leitungssystem kann Leitungsrohre, Sammelrohre und/oder Druckschläuche umfassen.The object of the invention is further achieved by a gas extinguishing system which has at least one pressure vessel for the pressure storage of an extinguishing fluid. The extinguishing fluid has an extinguishing liquid and a propellant gas. The respective pressure vessel is connected via a container valve or via a container valve release to a line system at least one extinguishing nozzle. The conduit system may include conduits, headers and / or pressure hoses.
Weiterhin weist die Gaslöschanlage einen Auslöser zum Öffnen des jeweiligen Behälterventils auf, um das Löschfluid in das Leitungssystem auszutragen.Furthermore, the gas extinguishing system has a trigger for opening the respective container valve in order to discharge the extinguishing fluid into the line system.
Typischerweise weisen alle Behälterventile einen Auslöser auf. Der Auslöser auf dem ersten Behälterventil wird von der Brandmeldezentrale angesteuert. Die verbleibenden Auslöser werden dann vorzugsweise durch den ersten geöffneten Druckbehälter gemeinsam angesteuert.Typically, all container valves have a trigger. The trigger on the first tank valve is controlled by the fire panel. The remaining triggers are then preferably driven together by the first open pressure vessel.
Der Auslöser kann ein elektrisch, pneumatisch oder hydraulisch ansteuerbarer Auslöser sein, der mechanisch mit dem jeweiligen Behälterventil zum Öffnen verbunden ist. Die Gaslöschanlage umfasst zudem eine Drossel oder Reduzierventil, die bzw. das im Leitungssystem angeordnet ist. Die Drossel ist über eine Steuervorrichtung der Gaslöschanlage zum (weiteren aktiven) Reduzieren oder auch zum Stoppen des Löschfluids-Mengenstroms ansteuerbar. Die Steuervorrichtung ist dazu eingerichtet, die Drossel beim Phasenübergang von einer hauptsächlich flüssigen Phase in eine hauptsächlich gasförmige Phase anzusteuern.The trigger can be an electrically, pneumatically or hydraulically controllable trigger, which is mechanically connected to the respective container valve for opening. The gas extinguishing system also includes a throttle or reducing valve, which is arranged in the line system. The throttle can be controlled via a control device of the gas extinguishing system for (further active) reducing or also for stopping the extinguishing fluid flow rate. The control device is designed to control the throttle during the phase transition from a mainly liquid phase into a mainly gaseous phase.
Durch die Ansteuerung der Drossel wird der Löschfluid-Mengenstrom reduziert. Erfolgt bereits eine Reduktion des Mengenstroms aufgrund des Phasenübergangs des Löschfluids von der hauptsächlich flüssigen Phase in die hauptsächlich gasförmige Phase, so wird durch die Ansteuerung der Drossel der Mengenstrom aktiv weiter reduziert.By controlling the throttle, the quenching fluid flow rate is reduced. If there is already a reduction in the mass flow due to the phase transition of the extinguishing fluid from the mainly liquid phase into the mainly gaseous phase, then the mass flow is actively further reduced by the activation of the throttle.
Nach einer Ausführungsform der Gaslöschanlage ist die Drossel zur Reduktion des Mengenstroms im Leitungssystem derart bemessen, dass der Schallpegel des entstehenden Lärms auf einen Wert von maximal 100 dB begrenzbar ist. Dies kann z.B. im Rahmen einer Typprüfung einer solchen Gaslöschanlage erfolgen. Im Rahmen der Bemessung können z.B. Lochblenden mit unterschiedlichen Strömungsdurchmessern getestet werden.According to one embodiment of the gas extinguishing system, the throttle for reducing the mass flow in the pipe system is dimensioned such that the sound level of the resulting noise can be limited to a maximum value of 100 dB. This can e.g. as part of a type test of such a gas extinguishing system. As part of the design, e.g. Perforated diaphragms with different flow diameters can be tested.
Einer weiteren Ausführungsform zufolge ist die Drossel derart bemessen, dass der Raumluftüberdruck auf einen Überdruckwert in einem Bereich von 200 bis 1000 Pa begrenzbar ist. Die Bemessung kann auch so erfolgen, dass sowohl der zuvor genannte maximale Schallpegelwert als auch der Überdruckwert eingehalten werden.According to another embodiment, the throttle is dimensioned such that the ambient air pressure can be limited to an overpressure value in a range of 200 to 1000 Pa. The design can also be done so that both the aforementioned maximum sound level value as well as the overpressure value are maintained.
Die Steuervorrichtung der erfindungsgemässen Gaslöschanlage kann z.B. ein triggerbares Zeitverzögerungsglied, d.h. einen sogenannten Timer, aufweisen. Im einfachsten Fall weist die Steuervorrichtung hierzu einen externen elektrischen Eingang zum Triggern des Zeitverzögerungsglieds auf. Das Zeitverzögerungsglied kann dann durch den Auslöser, durch eine vorgeschaltete Brandmeldezentrale oder auch durch einen manuell auslösbaren Löschtaster zum Ansteuern der Drossel getriggert werden. Der Auslöser, die Brandmeldezentrale wie auch der Löschtaster können dann an den elektrischen Triggereingang als Schalteingang der Steuervorrichtung angeschlossen werden.The control device of the gas extinguishing system according to the invention may e.g. a triggerable time delay, i. a so-called timer. In the simplest case, the control device for this purpose has an external electrical input for triggering the time delay element. The time delay element can then be triggered by the trigger, by an upstream fire panel or by a manually triggerable reset button to control the throttle. The trigger, the fire alarm panel as well as the extinguishing switch can then be connected to the electrical trigger input as a switching input of the control device.
Die Steuervorrichtung kann auch einen ersten Drucksensor zur Erfassung des Leitungsdrucks im Leitungssystems der Gaslöschanlage und/oder einen zweiten Drucksensor zur Erfassung des Raumluftüberdrucks in einem von den Löschdüsen entfernten Bereich der Gaslöschanlage aufweisen. Mit "entfernt" ist hier gemeint, dass der zweite Drucksensor nicht im Auslasssektor bzw. Ausströmbereich der Löschdüsen angeordnet sein soll.The control device can also have a first pressure sensor for detecting the line pressure in the line system of the gas extinguishing system and / or a second pressure sensor for detecting the ambient air overpressure in a region of the gas extinguishing system remote from the extinguishing nozzles. By "removed" is meant here that the second pressure sensor should not be arranged in the outlet sector or outflow area of the extinguishing nozzles.
Weiterhin alternativ oder zusätzlich weist die Steuervorrichtung ein Mikrophon zur Erfassung des Lärms im Bereich der Gaslöschanlage und/oder einen an Komponenten der Gaslöschanlage angebrachten Körperschallsensor zur Erfassung des Körperschalls auf.As an alternative or in addition, the control device has a microphone for detecting the noise in the area of the gas extinguishing system and / or a structure-borne noise sensor attached to components of the gas extinguishing system for detecting structure-borne noise.
Die Steuervorrichtung kann weiterhin einen Mengenstrommesser zur Erfassung des im Leitungssystem fliessenden Löschfluid-Mengenstroms aufweisen. Der Mengenstrommesser kann dabei in Flussrichtung des Löschfluids gesehen vor der Drossel oder auch nach der Drossel angeordnet sein.The control device may further comprise a mass flow meter for detecting the extinguishing fluid flow rate flowing in the line system. The mass flow meter can be arranged in the flow direction of the extinguishing fluid before the throttle or after the throttle.
Nach einer Ausführungsform sind die Steuervorrichtung und die Drossel zu einer Baueinheit zusammengefasst. Die Steuervorrichtung weist hydrodynamisch und/oder hydrostatisch wirkende Komponenten zum Betätigen der Drossel auf. Die Baueinheit aus Steuervorrichtung und Drossel kann auch "elektronikfrei", das heisst ohne elektrische Komponenten realisiert sein, wie z.B. durch Verwendung von mechanischen, hydraulischen und/oder pneumatischen Komponenten.According to one embodiment, the control device and the throttle are combined to form a structural unit. The control device has hydrodynamic and / or hydrostatic acting Components for actuating the throttle on. The assembly of control device and throttle can also be "electronics-free", that is, be implemented without electrical components, such as by the use of mechanical, hydraulic and / or pneumatic components.
Nach einer weiteren Ausführungsform weist das Löschfluid eine chemisch wirkende Löschflüssigkeit auf Basis von Halogenwasserstoffen und ein Inertgas, wie Stickstoff oder Argon, oder Kohlenstoffdioxid als Treibgas auf.According to a further embodiment, the extinguishing fluid has a chemically acting extinguishing liquid based on hydrogen halides and an inert gas, such as nitrogen or argon, or carbon dioxide as a propellant gas.
Die Erfindung sowie vorteilhafte Ausführungen der vorliegenden Erfindung werden am Beispiel der nachfolgenden Figuren erläutert. Dabei zeigen:
- FIG 1
- beispielhaft den zeitlichen Verlauf des während der Entladung einer Gaslöschanlage auftretenden Lärms und Raumluftüberdrucks nach dem Stand der Technik,
- FIG 2
- beispielhaft den zeitlichen Verlauf des während der Entladung einer Gaslöschanlage auftretenden reduzierten Lärms und Raumluftüberdrucks durch aktive Reduktion des Löschfluid-Mengenstroms gemäss dem erfindungsgemässen Verfahren,
- FIG 3
- ein Beispiel für eine erfindungsgemässe Gaslöschanlage mit einer im Leitungssystem angeordneten Drossel, welche über eine Steuervorrichtung zum Reduzieren oder Stoppen des Löschfluids-Mengenstroms ansteuerbar ist,
- FIG 4
- ein Beispiel für eine erfindungsgemässe Gaslöschanlage nach einer ersten Ausführungsform und
- FIG 5
- ein Beispiel für eine erfindungsgemässe Gaslöschanlage nach einer weiteren Ausführungsform.
- FIG. 1
- by way of example, the time course of the noise occurring during the discharge of a gas extinguishing system and room air overpressure according to the prior art,
- FIG. 2
- by way of example the time profile of the reduced noise and room air pressure occurring during the discharge of a gas extinguishing system by active reduction of the extinguishing fluid flow rate according to the method according to the invention,
- FIG. 3
- an example of an inventive gas extinguishing system with a throttle arranged in the line system, which can be controlled via a control device for reducing or stopping the quenching fluid flow rate,
- FIG. 4
- an example of an inventive gas extinguishing system according to a first embodiment and
- FIG. 5
- an example of a gas extinguishing system according to the invention according to a further embodiment.
Im oberen Teil der
Wie die
Im unteren Teil der
Erfindungsgemäss wird nun in einem Phasenübergangsbereich T, der mit einer signifikanten Abnahme des Löschfluid-Mengenstroms ṁ und einem signifikanten Anstieg des Lärms und des Raumluftdrucks einhergeht, der Mengenstrom ṁ reduziert.According to the invention, in a phase transition region T, which is accompanied by a significant decrease in the extinguishing fluid mass flow rate ṁ and a significant increase in the noise and the ambient air pressure, the mass flow rate ṁ is reduced.
Im oberen gezeigten Verlauf des Mengenstroms ṁ wird im Zeitpunkt t0 die signifikante Abnahme des Mengenstroms ṁ detektiert. Rechts davon ist der Verlauf des Mengenstroms ṁ dargestellt, wie dieser ohne die erfindungsgemässe weitere Reduzierung des Mengenstroms ṁ verlaufen würde. Die Detektion der signifikanten Abnahme des Mengenstroms ṁ bewirkt beispielhaft eine Änderung eines darunter eingezeichneten Verlaufs eines logischen binären Schaltzustandes S von dem Wert 0 auf den Wert 1. Der logische Wert 1 kann z.B. der Ansteuerung einer Drossel zur aktiven weiteren Reduzierung des Mengenstroms ṁ entsprechen. Ein logischer Wert von 0 entspricht folglich keiner aktiven Reduzierung des Mengenstroms ṁ. Der Verlauf des nun reduzierten Mengenstroms ṁ ist darunterliegend aufgetragen. Diese Reduzierung bewirkt letztlich die Begrenzung des sonstigen Lärmanstiegs auf einen reduzierten Schallpegelwert LRed von knapp 100 dB im Zeitpunkt t2 sowie eine Begrenzung des Raumluftüberdrucks pR auf einen Maximaldruckwert PRed im Zeitpunkt t3.In the upper course of the mass flow ṁ shown , the significant decrease of the mass flow ṁ is detected at the time t0. To the right of this, the course of the mass flow ṁ is shown, as it would run without the inventive further reduction of the mass flow ṁ . The detection of the significant decrease of the mass flow ṁ causes, for example, a change of a course drawn below a logical binary switching state S from the
Die Gaslöschanlage A umfasst beispielhaft nur einen einzigen Druckbehälter B zur Druckbevorratung eines Löschfluids F. Letzteres weist eine Löschflüssigkeit L, wie z.B. Novec® 1230, und ein Treibgas G, wie z.B. Stickstoff, auf. Der Druckbehälter B ist über ein Behälterventil BV an das Leitungssystem LS und an die Löschdüse D angeschlossen. Die Gaslöschanlage A weist weiterhin einen Auslöser AL zum Öffnen des Behälterventils BV auf, um das Löschfluid F in das Leitungssystem LS auszutragen. Im vorliegenden Beispiel wird der Auslöser AL durch eine Brandmeldezentrale BMZ getriggert.The gas extinguishing system A comprises, by way of example only, a single pressure vessel B for the pressure storage of an extinguishing fluid F. The latter comprises an extinguishing liquid L, such as e.g. Novec® 1230, and a propellant G, e.g. Nitrogen, up. The pressure vessel B is connected via a container valve BV to the line system LS and to the extinguishing nozzle D. The gas extinguishing system A further has a trigger AL for opening the container valve BV in order to discharge the extinguishing fluid F into the line system LS. In the present example, the trigger AL is triggered by a fire panel BMZ.
Gemäss der Erfindung ist im Leitungssystem LS eine Drossel DR angeordnet, welche über eine Steuervorrichtung SV zum Reduzieren oder Stoppen des Löschfluids-Mengenstroms ansteuerbar ist. Die Steuervorrichtung SV ist dazu eingerichtet, die Drossel DR beim Phasenübergang des Löschfluids F von einer hauptsächlich flüssigen Phase in eine hauptsächlich gasförmige Phase anzusteuern. Die Feststellung des Phasenübergangs kann z.B. sensorisch, d.h. mittels Sensoren, erfolgen. Der Phasenübergang kann auch nach Ablauf einer vorgegebenen Verzögerungszeit nach Auslösen der Gaslöschanlage A als festgestellt gelten.According to the invention, a throttle DR is arranged in the line system LS, which can be controlled via a control device SV for reducing or stopping the quenching fluid flow rate. The control device SV is designed to control the throttle DR during the phase transition of the extinguishing fluid F from a mainly liquid phase into a mainly gaseous phase. The detection of the phase transition can be e.g. sensory, i. by means of sensors. The phase transition can also be considered as established after a predetermined delay time has elapsed after triggering of the gas extinguishing system A.
Wie die
Die Steuervorrichtung SV und die Drossel DR können als Baueinheit BE z.B. eine gemeinsame Strömungsklappe oder ein gemeinsames Strömungsventil aufweisen, welche bzw. welches bei dem Phasenübergang des Löschfluids F vorzugsweise unumkehrbar umklappt bzw. umspringt oder umschnappt, und folglich den Strömungsquerschnitt für das Löschfluid F reduziert. Diese Baueinheit BE kann auch so ausgeführt sein, dass das Strömungsklappe bzw. das Strömungsventil nach dem Entladen der Gaslöschanlage A wieder zurückgesetzt werden kann.The control device SV and the throttle DR can be used as a unit BE, e.g. a common flow flap or a common flow valve, which at the phase transition of the extinguishing fluid F preferably invariably folds over or jump over or snap over, and consequently reduces the flow cross section for the extinguishing fluid F. This assembly BE can also be designed so that the flow flap or the flow valve after unloading the gas extinguishing system A can be reset again.
Im vorliegenden Fall weist die Steuervorrichtung SV eine Schaltlogik SL auf, die z.B. durch einen prozessorgestützten Steuerrechner realisiert sein kann. Die Schaltlogik SL kann alternativ ein oder mehrere Schaltrelais oder Schwellwertschalter mit einem vorzugsweise potentialfreien Schaltkontakt aufweisen. Ausgangsseitig steuert die Schaltlogik SL zum Reduzieren des Mengenstroms ṁ die Drossel DR an. Letztere ist im gezeigten Beispiel eine elektrisch ansteuerbare Drossel.In the present case, the control device SV on a switching logic SL, which may be realized for example by a processor-based control computer. The switching logic SL may alternatively comprise one or more switching relays or threshold switches with a preferably potential-free switching contact. On the output side, the switching logic SL controls to reduce of the mass flow ṁ the throttle DR. The latter is an electrically controllable throttle in the example shown.
Die Steuervorrichtung SV kann nur einen der gezeigten Detektoren bzw. Sensoren S1, S2, M, KS, MM zur Detektion des Phasenübergangs von der hauptsächlich flüssigen Phase des Löschfluids F in die hauptsächlich gasförmige Phase aufweisen.The control device SV can have only one of the detectors or sensors S1, S2, M, KS, MM shown for detecting the phase transition from the mainly liquid phase of the extinguishing fluid F into the mainly gaseous phase.
Sie kann alterativ oder zusätzlich einen Schalteingang zum Triggern eines Zeitverzögerungsglieds TIMER mit einer vorgegebenen Verzögerungszeit durch den Auslöser AL oder durch die vorgeschaltete Brandmeldezentrale BMZ aufweisen. Im Falle von zumindest zwei Eingangssignalen können diese durch die Schaltlogik ODER-verknüpft sein, so dass das in zeitlicher Hinsicht das zuerst eintreffende Eingangssignal bei Detektion des Phasenübergangs oder das zeitverzögerte Signal vom Zeitverzögerungsglied TIMER massgeblich für die Ansteuerung der Drossel DR ist.It may alternatively or in addition have a switching input for triggering a time delay element TIMER with a predetermined delay time by the trigger AL or by the upstream fire panel BMZ. In the case of at least two input signals, these may be OR-linked by the switching logic, so that in terms of time the first incoming input signal upon detection of the phase transition or the time-delayed signal from the time delay TIMER is decisive for the control of the throttle DR.
Im vorliegenden Beispiel weist die Steuervorrichtung SV als einen von mehreren Sensoren einen ersten Drucksensor S1 zur Erfassung des Leitungsdrucks pL im Leitungssystems LS der Gaslöschanlage A auf. Alternativ kann die Steuervorrichtung SV signal- oder datentechnisch an diesen Drucksensor S1 angeschlossen sein. Unterschreitet ein erfasster Leitungsdruckwert einen vorgebbaren Vergleichswert, so erfolgt die Ansteuerung der Drossel DR.In the present example, the control device SV, as one of a plurality of sensors, has a first pressure sensor S1 for detecting the line pressure p L in the line system LS of the gas extinguishing system A. Alternatively, the control device SV signal or data technology can be connected to this pressure sensor S1. If a detected line pressure value falls below a predeterminable comparison value, the control of the throttle DR takes place.
Weiterhin kann die Steuervorrichtung SV einen zweiten Drucksensor S2 zur Erfassung des Raumluftüberdrucks pR im Bereich der Gaslöschanlage A aufweisen oder signal- oder datentechnisch an diesen angeschlossen sein. Überschreitet ein erfasster Raumluftüberdruckwert einen vorgebbaren Vergleichswert, so erfolgt die Ansteuerung der Drossel DR.Furthermore, the control device SV may have a second pressure sensor S2 for detecting the room air overpressure p R in the area of the gas extinguishing system A or may be connected to it by signal or data technology. If a detected room air overpressure value exceeds a predefinable comparison value, the control of the throttle DR takes place.
Die Steuervorrichtung SV kann weiterhin alternativ oder zusätzlich ein Mikrophon M zur Erfassung des Lärms im Bereich der Gaslöschanlage A umfassen oder signal- oder datentechnisch an diesen angeschlossen sein. Überschreitet ein erfasster Lärmpegelwert einen vorgebbaren Vergleichswert, so erfolgt die Ansteuerung der Drossel DR.The control device SV can also alternatively or additionally a microphone M for detecting the noise in the area include the gas extinguishing system A or be connected by signal or data technology to this. If a detected noise level value exceeds a predefinable comparison value, the control of the throttle DR takes place.
Weiterhin kann die Steuervorrichtung einen an Komponenten der Gaslöschanlage A angebrachten Körperschallsensor KS zur Erfassung des Körperschalls aufweisen oder signal- oder datentechnisch an diesen angeschlossen sein, wie z.B. an einem Rohr des Leitungssystems LS. Überschreitet ein erfasster Körperschall-Lärmpegelwert einen vorgebbaren Vergleichswert, so erfolgt die Ansteuerung der Drossel DR.Furthermore, the control device may have a structure-borne sound sensor KS attached to components of the gas extinguishing system A for detecting structure-borne noise or may be connected to it by signal or data technology, such as, for example, on a pipe of the pipe system LS. Exceeds a detected structure-borne noise level value a predetermined reference value, the control of the throttle DR takes place.
Weiterhin kann die Steuervorrichtung SV einen Mengenstrommesser MM zur Erfassung des im Leitungssystem LS fliessenden Löschfluid-Mengenstroms ṁ aufweisen. Unterschreitet ein erfasster Wert für den Löschfluid-Mengenstroms ṁ einen vorgebbaren Vergleichswert, so erfolgt die Ansteuerung der Drossel DR.Furthermore, the control device SV may have a mass flow meter MM for detecting the extinguishing fluid flow rate fl flowing in the line system LS. If a detected value for the extinguishing fluid flow rate ṁ falls below a predeterminable comparison value, the control of the throttle DR takes place.
Die Steuervorrichtung SV kann alternativ oder zusätzlich signal- oder datentechnisch an einen Füllstandsmesser FM eines Druckbehälters B angeschlossen sein. Unterschreitet ein erfasster Füllstandswert einen vorgebbaren Vergleichswert, so erfolgt die Ansteuerung der Drossel DR.The control device SV may alternatively or additionally be connected to a level indicator FM of a pressure vessel B signal or data technology. If a detected fill level value falls below a predeterminable comparison value, the control of the throttle DR takes place.
Schliesslich kann die Steuervorrichtung SV auch eine Wiegevorrichtung W, wie z.B. eine Waage oder eine Kraftmessdose, aufweisen oder signal- oder datentechnisch an diese angeschlossen sein. Unterschreitet ein erfasster Gewichtswert einen vorgegebenen Vergleichswert, so erfolgt auch hier die Ansteuerung der Drossel DR.Finally, the control device SV can also have a weighing device W, such as a balance or a load cell, or be connected to this signal or data technology. If a detected weight value falls below a predetermined comparison value, the control of the throttle DR also takes place here.
- AA
- GaslöschanlageGas extinguishing system
- ALAL
- Auslösertrigger
- BB
- Druckbehälterpressure vessel
- BEBE
- Baueinheitunit
- BMZBMZ
- BrandmeldezentraleFire Panel
- BVBV
- Behälterventilcontainer valve
- BVABVA
- BehälterventilauslöserContainer valve actuator
- DD
- Löschdüseextinguishing nozzle
- DRDR
- Drossel, Reduzierventil, AbsperrventilThrottle, reducing valve, shut-off valve
- DSDS
- Druckschlauchpressure hose
- FF
- Löschfluidextinguishing fluid
- FMFM
- Füllstandsmesser, SchwimmerLevel gauge, float
- GG
- Treibgaspropellant
- KSKS
- KörperschallsensorAcoustic emission sensor
- LL
- Löschflüssigkeitextinguishing liquid
- LMax L Max
- MaximalschallpegelwertMaximum sound level value
- LPLP
- Schallpegelsound
- LRed L red
- reduzierter Schallpegelwertreduced sound level value
- LSLS
- Leitungssystemline system
- ṁm '
- Mengenstrom, MassenstromMass flow, mass flow
- MM
- Mikrophonmicrophone
- MMMM
- Mengenstrommesser, MassenstrommesserFlow meter, mass flow meter
- pL p L
- Leitungsdruckline pressure
- PMax P max
- MaximalüberdruckwertMaximum pressure value
- pR p R
- RaumluftüberdruckAir pressure
- PRed P Red
- ÜberdruckwertOverpressure value
- RR
- Rohr, RohrsystemPipe, pipe system
- SS
- Schaltzustandswitching status
- S1, S2S1, S2
- Drucksensorpressure sensor
- SLSL
- Schaltlogik, SteuerrechnerSwitching logic, control computer
- SRSR
- Sammelrohrmanifold
- SVSV
- Steuervorrichtungcontrol device
- TT
- PhasenübergangsbereichPhase transition area
- t, t0-t3t, t0-t3
- Zeit, ZeitpunkteTime, times
- TIMERTIMER
- Zeitverzögerungsglied, Timer, ZeitgliedTime delay element, timer, timer
- WW
- Wiegevorrichtung, WaageWeighing device, balance
Claims (15)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14165943.3A EP2937116B1 (en) | 2014-04-25 | 2014-04-25 | Reduction of noise and positive air pressure when discharging a gas extinguisher system |
US14/696,641 US9889326B2 (en) | 2014-04-25 | 2015-04-27 | Method and system for reducing noise and room air overpressure on discharge of a gas extinguisher system |
US15/814,444 US10603533B2 (en) | 2014-04-25 | 2017-11-16 | Method for reducing noise and room air overpressure on discharge of a gas extinguisher system |
Applications Claiming Priority (1)
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EP14165943.3A EP2937116B1 (en) | 2014-04-25 | 2014-04-25 | Reduction of noise and positive air pressure when discharging a gas extinguisher system |
Publications (2)
Publication Number | Publication Date |
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EP2937116A1 true EP2937116A1 (en) | 2015-10-28 |
EP2937116B1 EP2937116B1 (en) | 2023-10-18 |
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EP14165943.3A Active EP2937116B1 (en) | 2014-04-25 | 2014-04-25 | Reduction of noise and positive air pressure when discharging a gas extinguisher system |
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US (2) | US9889326B2 (en) |
EP (1) | EP2937116B1 (en) |
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CN107815818A (en) * | 2016-09-14 | 2018-03-20 | 迪尔阿扣基金两合公司 | Distributor and the electrical equipment with the distributor |
CN112334743A (en) * | 2018-11-30 | 2021-02-05 | 开利公司 | Suppression tank scale and level determination |
FR3107940B1 (en) * | 2020-03-04 | 2022-02-11 | Air Liquide | Pressurized gas container with electronic device that automatically calculates the expiry date of the gas |
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US2311845A (en) * | 1940-02-03 | 1943-02-23 | American La France Foamite | Carbon dioxide system |
FR2725776A1 (en) * | 1994-10-14 | 1996-04-19 | Abc Protection Environnement S | Compressed gas generator and fire extinguishing system for large buildings |
WO2009126155A1 (en) * | 2008-04-10 | 2009-10-15 | Utc Fire & Security Corporation | Fire suppression system with improved two-phase flow distribution |
WO2010071622A1 (en) * | 2008-12-18 | 2010-06-24 | Utc Fire & Security Corporation | Atomizing nozzle for a fire suppression system |
Family Cites Families (3)
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FI100701B (en) * | 1996-09-05 | 1998-02-13 | Marioff Corp Oy | Fire-fighting equipment |
DE10361020B4 (en) * | 2003-12-24 | 2010-09-30 | Airbus Deutschland Gmbh | Fire fighting equipment |
ES2351888T3 (en) * | 2008-10-07 | 2011-02-11 | Amrona Ag | INSTALLATION OF FIRE EXTINGUISHING BY GAS INERTE TO REDUCE THE RISK AND EXTINGUISH FIRE IN A PROTECTED PREMISES. |
-
2014
- 2014-04-25 EP EP14165943.3A patent/EP2937116B1/en active Active
-
2015
- 2015-04-27 US US14/696,641 patent/US9889326B2/en active Active
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2017
- 2017-11-16 US US15/814,444 patent/US10603533B2/en active Active
Patent Citations (4)
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US2311845A (en) * | 1940-02-03 | 1943-02-23 | American La France Foamite | Carbon dioxide system |
FR2725776A1 (en) * | 1994-10-14 | 1996-04-19 | Abc Protection Environnement S | Compressed gas generator and fire extinguishing system for large buildings |
WO2009126155A1 (en) * | 2008-04-10 | 2009-10-15 | Utc Fire & Security Corporation | Fire suppression system with improved two-phase flow distribution |
WO2010071622A1 (en) * | 2008-12-18 | 2010-06-24 | Utc Fire & Security Corporation | Atomizing nozzle for a fire suppression system |
Non-Patent Citations (1)
Title |
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WAGNER GROUP GMBH: "FirExting Inert gas extinguishing systems", 1 July 2013 (2013-07-01), www.wagner-uk.com/news/downloads/brochures, pages 1 - 12, XP055141669, Retrieved from the Internet <URL:http://www.wagner-uk.com/uploads/tx_wwdownloads/WAGNER_FirExting_Inertgas_Loeschanlagen__E_.pdf> [retrieved on 20140919] * |
Also Published As
Publication number | Publication date |
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US10603533B2 (en) | 2020-03-31 |
US20180071561A1 (en) | 2018-03-15 |
US9889326B2 (en) | 2018-02-13 |
US20150306438A1 (en) | 2015-10-29 |
EP2937116B1 (en) | 2023-10-18 |
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