Arrangement for exchanging a gaseous medium

Abstract

The invention relates to an arrangement for exchanging a gaseous medium (MRL, FL), which is located in a chamber (MR) of a rail vehicle, comprising a chamber (MR) of a rail vehicle and comprising a gas jet ventilator (GSV). The gas jet ventilator (GSV) has an intake nozzle (DUS) and an outlet opening (AUSL). The intake nozzle (DUS) has a first inlet to which a gaseous propellant (TRM) is connected, the propellant (TRM) being introduced under pressure into the intake nozzle (DUS). The intake nozzle (DUS) has a second inlet through which a gaseous medium (MRL, FL) is sucked into the intake nozzle (DUS). The intake nozzle (DUS) is designed in such a way that a negative pressure is produced in the intake nozzle (DUS) by the introduced propellant (TRM) and the gaseous medium (MRL, FL) is sucked into the intake nozzle (DUS) by the negative pressure. The propellant (TRM) and the gaseous medium (MRL, FL) are conducted via the outlet opening (AUSL) in order to leave the gas jet ventilator (GSV) as a discharge. The gas jet ventilator (GSV) is coupled to the chamber (MR) in such a way that the gaseous medium (MRL) is exchanged in the chamber (MR) by discharging the gaseous medium (MRL, FL) and the propellant (TRM) via the outlet opening (AUSL).

Description

[0001] 202416355

[0002] 1

[0003] Description

[0004] Arrangement for the exchange of a gaseous medium

[0005] The invention relates to an arrangement for exchanging a gaseous medium located in a space, for example in an engine room, of a rail vehicle.

[0006] Introduction and State of the Art

[0007] Components of a rail vehicle, such as tanks and containers, are located either on the outside of the vehicle or in special compartments (engine room, fuel room, etc.) inside the vehicle. In locomotives, in particular, these components are located in the engine room.

[0008] The space is preferably separated from other spaces in the rail vehicle and forms a self-contained functional unit within the rail vehicle.

[0009] The term "aggregate" refers in particular to several, preferably interacting, machines, apparatus, or devices. Examples include cooling systems, emergency power generators, drives, drive components, tanks or containers, gearboxes, etc.

[0010] To ensure proper and long-term reliable operation of the units, it is necessary to renew or replace the gas or air mixture present in the room at regular intervals.

[0011] For this exchange, fans are used that are coupled to the room in such a way that, during ventilation, for example, air from the surroundings of the rail vehicle enters the room and / or that during ventilation of the room, air or a gas mixture contained therein is released from the room into the surroundings of the rail vehicle.

[0012] The fans thus effect an exchange of a gaseous medium within the space under consideration. This exchange occurs via a constant or variable volume flow, ensuring that the atmosphere within the space meets the requirements of the equipment. 202416355

[0013] 2

[0014] Selecting suitable fans is made more difficult by space constraints, limited room volume, fire protection requirements, suitability for the intended use (which is specified under the term "rail strength" for the rail vehicle), and / or explosion protection requirements for the room.

[0015] Task

[0016] It is therefore an object of the invention described below to provide an arrangement for the exchange of gases in a space, in particular in an engine room, of a rail vehicle, which makes it possible to comply with the above-mentioned or specified requirements in a simple and cost-effective manner.

[0017] This problem is solved by the features of claim 1. Advantageous further developments are specified in the dependent claims.

[0018] Description of the invention

[0019] The invention relates to an arrangement for exchanging a gaseous medium located in a space, in particular in an engine room, of a rail vehicle.

[0020] A gas jet fan is used for the replacement; its operating principle, which is known in itself, is briefly explained below.

[0021] The gas jet fan has an intake nozzle and an associated outlet opening.

[0022] The suction nozzle has a first inlet and a second inlet. A gaseous propellant medium is connected to the first inlet of the suction nozzle and is introduced into the suction nozzle under pressure.

[0023] The suction nozzle is designed such that the introduced motive medium creates a vacuum inside the nozzle. This vacuum draws the gaseous medium to be conveyed into the interior of the suction nozzle through the second inlet. 202416355

[0024] 3

[0025] Both the motive medium and the gaseous medium exit the gas jet fan via the outlet opening.

[0026] The gas jet fan is coupled to the room via its inlets and outlet opening in such a way that the combined discharge of the conveyed gaseous medium and the motive medium via the outlet opening results in an exchange of the gaseous medium in the room.

[0027] In a first embodiment of the invention, which is described below with the aid of FIG 1, a tank container, for example a hydrogen tank, is arranged in the room.

[0028] The tank is connected to the first inlet of the gas jet fan, so that its tank contents, for example hydrogen, can be used as a gaseous motive medium in the gas jet fan.

[0029] Depending on the tank capacity, it is also conceivable to use other gases, such as nitrogen, CO2, natural gas, propane, etc., as a gaseous propellant.

[0030] The second inlet of the gas jet fan is connected to the interior of the room, so that the gaseous medium present there, for example air, is drawn into the interior of the gas jet fan as the gaseous medium to be conveyed.

[0031] The outlet opening of the gas jet fan is preferably located in the outside of the room or connected to an outside of the rail vehicle in order to ventilate the room during the replacement process.

[0032] In an advantageous further development, the gas jet fan is arranged inside the room, e.g. in the roof area of ​​the room.

[0033] In an advantageous further development, a valve is arranged between the tank container and the first inlet of the gas jet fan, through which the operation of the gas jet fan is controlled.

[0034] In an advantageous further development, the interior of the room is connected to an exterior area. For this purpose, a ventilation opening is provided in the room. 202416355

[0035] 4. These are located, for example, in a floor area of ​​the room. The connection between the room and its exterior, or the ventilation opening, ensures ventilation of the room along with the exhaust air.

[0036] For example, fresh, unused air enters the room through the ventilation opening to ensure the required atmosphere for the room.

[0037] In a second embodiment of the invention, which is described below with the aid of FIG. 2, the first inlet of the gas jet fan is connected to a compressed air system of the rail vehicle in order to use compressed air as a motive medium.

[0038] The second inlet of the gas jet fan is connected to an outside of the room or to an outside of the rail vehicle, for example to use fresh air as the gaseous medium to be conveyed.

[0039] The outlet opening of the gas jet fan is connected to the interior of the room in order to ventilate the room as part of the exchange process.

[0040] In an advantageous further development, the gas jet fan is arranged inside the room, for example in the floor area of ​​the room.

[0041] In an advantageous further development, the intake nozzle of the gas jet fan is arranged outside the room.

[0042] In an advantageous further development, the outlet opening of the gas jet fan is located at least partially inside the room.

[0043] In an advantageous further development, a valve is arranged between the compressed air system of the rail vehicle and the first inlet of the gas jet fan, through which the operation of the gas jet fan is controlled.

[0044] In an advantageous further development, the interior of the room is connected to an exterior area. For this purpose, a ventilation opening is provided in the room, located, for example, in the roof area. This connection to the exterior, or the ventilation opening, ensures proper ventilation of the room. 202416355

[0045] 5

[0046] In an advantageous further development of the two embodiments, the gas jet fan is connected to an earthing system to prevent its electrostatic charging.

[0047] Advantages:

[0048] The present invention requires only a small installation space volume compared to previously used fans.

[0049] The present invention makes it possible to effectively ventilate or extract air from large rooms or machine rooms.

[0050] The present invention enables compliance with fire protection requirements and / or explosion protection requirements with minimal effort.

[0051] The present invention avoids the use of previously used fans with moving or rotating parts. Thus, the present invention ensures the track strength, the longevity of the arrangement, and its reliability with minimal effort.

[0052] The present invention can be operated without an electrical energy supply. Therefore, the present arrangement does not constitute a hazardous ignition source, which makes it possible to use the arrangement even in explosion-proof areas of the rail vehicle or in the event of power supply failures.

[0053] The present invention can be used in any room, in particular in a tank room or engine room considered to be at risk.

[0054] Character description:

[0055] The invention is explained in more detail below with the aid of a drawing.

[0056] This shows:

[0057] FIG 1 shows a first embodiment of the invention and

[0058] FIG 2 shows a second embodiment of the invention. 202416355

[0059] 6

[0060] FIG 1 shows a first embodiment of the invention in which an engine room MR of a rail vehicle, not shown in detail here, is ventilated or extracted in the sense of an emergency ventilation system.

[0061] For example, hydrogen tanks H2T are located in the engine room MR, which provide hydrogen gas under high pressure as a propellant TRM.

[0062] The following assumes that due to an emergency in the engine room MR, it needs to be ventilated as quickly as possible.

[0063] In the roof area MRD of the engine room MR a gas jet fan GSV is arranged, which has an intake nozzle DUS and an outlet opening AUSL.

[0064] In this example, the intake nozzle DUS is located inside the engine room MR and the outlet opening AUSL is located at least partially outside the engine room MR.

[0065] Gaseous hydrogen is fed as gaseous propellant TRM (at a correspondingly high speed or pressure) into a first inlet of the intake nozzle DUS and leaves the gas jet fan GSV via the outlet opening AUSL.

[0066] The hydrogen is supplied to the gas jet fan GSV as a gaseous propellant TRM via a valve VENT.

[0067] The intake nozzle DUS is shaped such that the gaseous motive medium TRM creates a vacuum inside the intake nozzle DUS. This vacuum draws machine room air MRL, located in the machine room MR, into the intake nozzle DUS as the gaseous medium to be conveyed, via a second inlet of the intake nozzle DUS.

[0068] The engine room air (MRL) also leaves the gas jet fan (GSV) via the outlet opening (AUSL).

[0069] The outlet opening AUSL, which contains no moving parts, is designed here, for example, in the form of a funnel.

[0070] The gaseous propellant TRM (hydrogen) and the gaseous medium to be pumped (engine room air MRL) mix in the area of ​​the outlet opening AUSL and enter as 202416355

[0071] 7

[0072] Exhaust air AL via an opening in the roof area MRD of the engine room MR into an outside AB of the rail vehicle or into an external environment of the rail vehicle, so that the engine room MR is ventilated.

[0073] The outlet opening AUSL thus forms an opening in the roof area MRD of the engine room MR.

[0074] To ensure the ventilation of the engine room MR associated with the venting, a ventilation opening BOF is provided in the floor area MRB of the engine room MR and / or in its side walls.

[0075] Their opening or opening diameter is preferably controllable or adjustable.

[0076] Fresh air FL from the outside AB of the rail vehicle or from the external environment of the rail vehicle enters the engine room MR via the ventilation opening BOF.

[0077] The GSV gas jet fan is connected to a grounding system to prevent electrostatic charging.

[0078] The VENT valve controls the supply of the gaseous propellant TRM, so that the amount of exhaust air AL of the gas jet fan GSV is controlled via the VENT valve.

[0079] The example shown here is particularly advantageous if hydrogen escapes through a leak in one of the hydrogen tanks H2T in the engine room MR and an explosive air-hydrogen mixture is to be feared inside the engine room MR.

[0080] Preferably, the leakage of hydrogen from a defective hydrogen tank H2T is detected.

[0081] Preferably, the damaged hydrogen tank H2T is isolated from the undamaged hydrogen tanks H2T.

[0082] Preferably, the hydrogen contained in a damaged hydrogen tank (H2T) is used as the propellant (TRM). 202416355

[0083] 8

[0084] Alternatively, hydrogen from an undamaged hydrogen tank H2T is used as propellant TRM.

[0085] As an alternative to the example described here, exhaust gases from engine room units or gaseous fire extinguishing agents can also be used as a gaseous propellant TRM.

[0086] FIG 2 shows a second embodiment of the invention, in which an engine room MR of a rail vehicle, which is not shown in detail here, is ventilated.

[0087] In the floor area MRB of the engine room MR a gas jet fan GSV is arranged, which has an intake nozzle DUS and an outlet opening AUSL.

[0088] The intake nozzle DUS is shown here outside the engine room MR and the outlet opening AUSL is shown here inside the engine room MR as an example.

[0089] A gaseous propellant medium TRM is directed (at a correspondingly high speed or pressure) into a first inlet of the intake nozzle DUS and exits the gas jet fan GSV via the outlet opening AUSL.

[0090] Compressed air is preferably used as the gaseous propellant TRM, which is preferably formed by a compressed air system of the rail vehicle and supplied via a valve VENT or reaches the first inlet of the suction nozzle DUS.

[0091] The intake nozzle DUS is shaped in such a way that the gaseous propellant TRM creates a vacuum inside the intake nozzle DUS. This vacuum draws fresh air FL, the gaseous medium to be conveyed, into the intake nozzle DUS through a second inlet.

[0092] The fresh air FL preferably originates from an exterior AB of the rail vehicle or from an external environment of the rail vehicle.

[0093] The fresh air FL also leaves the gas jet fan GSV via the outlet opening AUSL.

[0094] The outlet opening AUSL, which contains no moving parts, is designed here, for example, in the form of a funnel. 202416355

[0095] 9

[0096] In the area of ​​the outlet opening AUSL, the gaseous propellant medium TRM (compressed air) and the gaseous medium FL (fresh air) to be conveyed mix.

[0097] The resulting mixture LFTG is expelled into the engine room MR via the outlet opening of the gas jet fan GSV in order to ventilate it.

[0098] The LFTG mixture mixes inside the engine room MR with the air contained therein, in particular used air, and escapes as exhaust air AL into the environment of the rail vehicle or into the outside AB of the rail vehicle via a vent opening EOF, which is provided in the roof area MRD of the engine room MR.

[0099] The GSV gas jet fan is connected to a grounding system to prevent electrostatic charging.

[0100] The VENT valve controls the supply of the gaseous propellant TRM, so that the delivery of the quantity of the mixture LFTG of the gas jet fan GSV is controlled via the VENT valve.

Claims

202416355 10 Patent claims 1. Arrangement for the exchange of a gaseous medium (MRL, FL) located in a space (MR) of a rail vehicle, - with a room (MR) of a rail vehicle and with a gas jet fan (GSV), - in which the gas jet fan (GSV) has an intake nozzle (DUS) and an outlet opening (AUSL), - in which the suction nozzle (DUS) has a first inlet to which a gaseous propellant medium (TRM) is connected, and the propellant medium (TRM) is introduced into the suction nozzle (DUS) under pressure, - in which the intake nozzle (DUS) has a second inlet through which a gaseous medium (MRL, FL) is drawn into the intake nozzle (DUS), - in which the intake nozzle (DUS) is designed in such a way that a negative pressure is created in the intake nozzle (DUS) by the introduced propellant medium (TRM) and the gaseous medium (MRL, FL) is drawn into the intake nozzle (DUS) by the negative pressure, - in which the propellant medium (TRM) and the gaseous medium (MRL, FL) are directed through the outlet opening (AUSL) to exit the gas jet fan (GSV) as a discharge, - in which the gas jet fan (GSV) is coupled to the room (MR) in such a way that the release of the gaseous medium (MRL, FL) and the motive medium (TRM) via the outlet opening (AUSL) results in an exchange of the gaseous medium (MRL) in the room (MR).

2. Arrangement according to claim 1 , - in which a tank container (H2T) with a tank contents is arranged in the room (MR), - where the first inlet of the gas jet fan (GSV) is connected to the tank container (H2T) in order to use its tank contents as a propellant medium (TRM), - in which the second inlet of the gas jet fan (GSV) is connected to the interior of the space (MR), so that a gaseous medium (MRL) located in the space (MR) of the rail vehicle is drawn into the interior of the gas jet fan, - where the outlet opening (AUSL) of the gas jet fan (GSV) is connected to an outside of the room (MR) or to an outside of the rail vehicle in order to achieve ventilation of the room (MR) as part of the exchange. 202416355 11 3. Arrangement according to claim 2, wherein the gas jet fan (GSV) is arranged at least partially within the room (MR) and / or at least partially in the roof area (MRD) of the room (MR).

4. Arrangement according to claim 2 or 3, - where the intake nozzle (DUS) of the gas jet fan (GSV) is located inside the room (MR), - in which the outlet opening (AUSL) of the gas jet fan (GSV) is located at least partially outside the room (MR).

5. Arrangement according to one of claims 2 to 4, wherein a valve (VENT) is arranged between the tank container (H2T) and the first inlet of the gas jet fan (GSV), by which the operation of the gas jet fan (GSV) can be controlled.

6. Arrangement according to one of claims 2 to 5, wherein the interior of the room (MR), preferably via a ventilation opening (BOF) arranged in a floor area (MRB) of the room (MR), is connected to an exterior of the room (MR) in order to ensure ventilation of the room (MR) in conjunction with the ventilation.

7. Arrangement according to claim 1 , - where the first inlet of the gas jet fan (GSV) is connected to a compressed air system of the rail vehicle to use compressed air as a motive medium (TRM), - where the second inlet of the gas jet fan (GSV) is connected to an outside area (AB) of the room (MR) and / or to an outside area of ​​the rail vehicle in order to use the air (FL) there as the gaseous medium, - in which the outlet opening (AUSL) of the gas jet fan (GSV) is connected to an interior of the room (MR) in order to achieve ventilation of the room (MR) as part of the exchange.

8. Arrangement according to claim 7, wherein the gas jet fan (GSV) is arranged at least partially inside the room (MR) and / or at least partially in the floor area (MRB) of the room (MR).

9. Arrangement according to claim 7 or 8, - where the intake nozzle (DUS) of the gas jet fan (GSV) is located outside the room (MR), 202416355 12 - in which the outlet opening (AUSL) of the gas jet fan (GSV) is located at least partially inside the room (MR).

10. Arrangement according to one of claims 7 to 9, wherein a valve (VENT) is arranged between the compressed air system of the rail vehicle and the first inlet of the gas jet fan (GSV), by which the operation of the gas jet fan (GSV) can be controlled.

11. Arrangement according to one of claims 7 to 10, wherein the interior of the room (MR), preferably via a ventilation opening (EOF) arranged in a roof area (MRB) of the room (MR), is connected to an exterior of the room (MR) in order to ensure ventilation of the room (MR) in conjunction with ventilation.

12. Arrangement according to one of the preceding claims, wherein the gas jet fan (GSV) is connected to an earthing system to prevent its electrostatic charging.

13. Arrangement according to one of the preceding claims, wherein the space (MR) is an engine room (MR) or a tank room.

14. Rail vehicle with an arrangement for exchanging a gaseous medium (MRL, FL), wherein the arrangement is designed according to one of the preceding claims.

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