EP3805566A1 - Installation d'aération de tunnel - Google Patents

Installation d'aération de tunnel Download PDF

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Publication number
EP3805566A1
EP3805566A1 EP20201241.5A EP20201241A EP3805566A1 EP 3805566 A1 EP3805566 A1 EP 3805566A1 EP 20201241 A EP20201241 A EP 20201241A EP 3805566 A1 EP3805566 A1 EP 3805566A1
Authority
EP
European Patent Office
Prior art keywords
ventilation system
tunnel ventilation
fan
motor
fuel
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.)
Pending
Application number
EP20201241.5A
Other languages
German (de)
English (en)
Inventor
Werner Rittmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wettertechnik GmbH
Original Assignee
Wettertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102020119263.0A external-priority patent/DE102020119263A1/de
Application filed by Wettertechnik GmbH filed Critical Wettertechnik GmbH
Publication of EP3805566A1 publication Critical patent/EP3805566A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps

Definitions

  • the invention relates to a tunnel ventilation system according to the preamble of the independent device claim and a method for ventilating tunnels and / or shaft systems with the aid of a corresponding tunnel ventilation system according to the preamble of the independent method claim.
  • Tunnel ventilation systems are known in principle.
  • the tunnel ventilation systems are usually equipped with fans that suck fresh air into the tunnels and / or suck old air out of the tunnels.
  • Gasoline-powered internal combustion engines are often used to drive fans.
  • the gasoline-powered internal combustion engines however, have the disadvantage of toxic exhaust gases.
  • Electric motors can serve as an alternative to internal combustion engines. In the area of application of tunnel and / or Shaft systems often lack the necessary electrical connections to supply the electric motors of the ventilation systems with electrical energy.
  • the invention is therefore based on an object of providing an improved tunnel ventilation system which at least partially overcomes the disadvantages described above.
  • a tunnel ventilation system which can be used in particular in tunnel and / or shaft construction and / or in areas where work is carried out with substances hazardous to water, as well as in environmental protection areas, with the features of the independent device claim, in particular from the characterizing part.
  • the object according to the invention is achieved by a method for ventilating tunnels and / or shaft systems with the aid of a corresponding tunnel ventilation system with the features of the independent method claim, in particular from the characterizing part.
  • the invention provides a tunnel ventilation system comprising: at least one fan for sucking in and / or sucking out air and a motor for driving the fan. It is provided here that the engine is driven (directly or indirectly) with the aid of a fuel, in particular hydrogen (H 2).
  • a fuel in particular hydrogen (H 2).
  • the engine is driven in an environmentally friendly (direct or indirect) way. Being driven directly with the help of a fuel is called im
  • the motor is operated directly with the fuel, for example the motor converts the fuel into another form of energy, in particular mechanical energy.
  • the motor can be designed, for example, as an internal combustion engine that burns the fuel, for example in the form of hydrogen, in order to drive the fan. The thermal energy of the combustion is converted into the mechanical kinetic energy of the fan.
  • the motor can, for example, be designed as an electric motor that is supplied with electrical energy by a fuel cell unit.
  • the fuel cell unit converts the fuel, for example in the form of hydrogen, and an oxygen-containing reactant, for example in the form of simple ambient air, into electrical energy and water.
  • the electrochemical energy of the conversion is converted into the electrical energy for operating the electric motor and thus for driving the fan.
  • the fuel can be provided in fuel tanks, which can be designed as replaceable tank bottles and / or which, for example, at a gas station; can be filled or refueled.
  • the tank bottles are pressure bottles (approx. Up to max. 300 bar or max. Approx. 700 bar), bottles with cooling for storing liquid gas and / or metal mesh tanks with heating for binding hydrogen ions.
  • an improved tunnel ventilation system can be made available which is simply constructed, which is easy to operate, which can be set up in a mobile manner and which can be operated in an environmentally friendly manner.
  • the invention can provide that the motor is designed in the form of an electric motor.
  • the engine is driven indirectly with the fuel.
  • the advantages of an electric motor are that the electric motor does not produce any exhaust gases and provides the required power quickly, almost without delay.
  • Another advantage of an electric motor is the power electronic control, which can expand the functionality of the tunnel ventilation system.
  • the functionality of the tunnel ventilation system can, for example, be achieved by quickly changing the The direction of flow and / or can be expanded by specifically setting a desired flow rate.
  • the invention can provide that a fuel cell unit, in particular a modular fuel cell unit, is provided (to generate electrical energy) which uses the fuel, in particular hydrogen, to supply the motor with electrical energy.
  • a fuel cell unit in particular a modular fuel cell unit
  • the greatest advantage of a fuel cell unit is the environmentally friendly generation of energy without harmful exhaust gases.
  • the advantages of a modular fuel cell unit can be that the fuel cell unit can be put together flexibly depending on the desired application and the available installation space, and that the modules can be easily exchanged, for example for maintenance purposes.
  • the fuel cell unit can advantageously have a water excretion reservoir.
  • a water excretion reservoir the product water (also called waste water) from the fuel cell unit can be collected and used as required, e.g. for water management of the fuel cell unit, e.g. B. to moisten the membrane (s) of the fuel cell unit, can be reused.
  • the water excretion reservoir can have a return path to the fuel cell unit.
  • the invention can provide that the fuel cell unit has at least one electrical connection, in particular in the form of a socket, in order to supply at least one further consumer in addition to the motor with electrical energy.
  • the fuel cell unit can offer a simple possibility of easily and conveniently supplying such machines as consumers with electrical energy on site.
  • the fuel cell unit can have a temperature control system in order to control the temperature of the fuel cell unit to a suitable operating temperature (ie to warm it up or to cool it).
  • the temperature control system can advantageously serve to heat the fuel cell unit at low temperatures below a suitable operating temperature and to cool it down to a suitable operating temperature at high temperatures, for example during operation of the fuel cell unit. Reliable and efficient operation of the fuel cell unit can thus be ensured.
  • the engine is designed in the form of an internal combustion engine, in particular an Otto engine or a gas turbine, which is driven directly with the fuel.
  • an internal combustion engine in particular an Otto engine or a gas turbine, which is driven directly with the fuel.
  • the motor in particular in the form of an internal combustion engine, can advantageously have an output shaft which is in a mechanical operative connection, for example via a gear, with an input shaft of the fan or is directly connected to the input shaft of the fan in a rotationally fixed manner.
  • an output shaft which is in a mechanical operative connection, for example via a gear, with an input shaft of the fan or is directly connected to the input shaft of the fan in a rotationally fixed manner.
  • a starter generator can be provided for the engine, in particular in the form of an internal combustion engine, in order to accelerate the engine (in its function as a starter) (to crank it when starting and / or to assist in driving the fan during operation ) and / or (in its function as a generator) to charge an electrical energy storage device.
  • a starter generator can accelerate the engine (in its function as a starter) (to crank it when starting and / or to assist in driving the fan during operation ) and / or (in its function as a generator) to charge an electrical energy storage device.
  • the invention can provide for a tunnel ventilation system that an electrical energy store is provided in order to supply the motor, in particular in the form of an electric motor, for example in the event of failure or when refueling a fuel cell unit, with electrical energy and / or to supply the motor, in particular in Form of an internal combustion engine, accelerated by a starter generator.
  • an electrical energy store is provided in order to supply the motor, in particular in the form of an electric motor, for example in the event of failure or when refueling a fuel cell unit, with electrical energy and / or to supply the motor, in particular in Form of an internal combustion engine, accelerated by a starter generator.
  • the invention can provide for a tunnel ventilation system that a sensor unit is provided in order to sense the fuel content in the air adjacent to the tunnel ventilation system and / or to examine the air quality of the air adjacent to the tunnel ventilation system. In this way it can be ensured that the fuel content in the air adjacent to the tunnel ventilation system is monitored in order to avoid an accumulation of explosive amounts of fuel. By monitoring the air quality, it can also be ensured that the air to breathe is always checked in order not to endanger the health of the miners, or that the air for operating the fuel cell unit meets the requirements of the fuel cell unit.
  • the invention can provide a fuel tank, in particular with a modular structure, for the fuel, preferably with several exchangeable tank bottles.
  • the fuel tank and / or the tank bottles can be used for the storage of fuel in gaseous form under pressure, e.g. in pressure tanks, for the storage of fuel in liquid form, e.g. in tanks with appropriate cooling, or for the storage of fuel in ionic form , for example.
  • a metal grille with appropriate heating is the advantage of modular fuel tanks is the flexibility in storing the fuel.
  • the advantage of exchangeable fuel bottles is the ease of exchange and refilling as well as the weight and installation space adaptation to the desired application and the local environment.
  • At least one fill level sensor for the fuel tank in particular one fill level sensor for each tank bottle of the fuel tank, can advantageously be provided.
  • the fill level of the fuel tank and / or the tank bottles of the fuel tank can be monitored in order to be able to ensure that the fuel tank or the tank bottles of the fuel tank are refilled or replaced in good time and that uninterrupted operation of the fuel cell unit can be made possible.
  • an oxygen tank can be provided in order, for example, to supply a fuel cell unit with an oxygen-containing reactant. Since building rubble and / or fine dust are often in the air in the area of tunnel and / or shaft construction, this air can be unsuitable for operating the fuel cell unit. By storing the oxygen in an oxygen tank, the operation of the fuel cell unit can always be ensured.
  • the invention can provide a control unit in a tunnel ventilation system that is designed to control the tunnel ventilation system as a function of input commands from a user and / or as a function of sensor data from a sensor unit, in particular automatically and / or autonomously.
  • an intelligent system can be made available which can be operated manually, automatically and / or even autonomously.
  • a user can, for example, set the tunnel ventilation system, in particular the fan, manually for a certain time, for an interval start-up and / or for intermittent ventilation of the tunnel or the like.
  • the control unit can be designed in such a way that the control unit proposes automated programs for operating the fan, for example via a user interface in the form of a touch display and / or a key input field.
  • the user interface can be provided on a fan housing, for example.
  • the control unit can be designed in such a way that the control unit gives the user an option, for example via a user interface in the form of a touch display and / or a key input field, various settings for operating the fan, such as z. B. time, duration, interval, operating mode, etc. in detail to be able to carry out manually.
  • Autonomous operation of a tunnel ventilation system can provide that the control unit can communicate with a sensor unit and control the tunnel ventilation system accordingly on the basis of sensor data (fuel content, air quality, etc.).
  • the invention can provide a lighting unit or a light unit in a tunnel ventilation system, for example comprising at least one lamp or an LED, in order to illuminate at least one area around the tunnel ventilation system.
  • a lighting unit or a light unit in a tunnel ventilation system for example comprising at least one lamp or an LED, in order to illuminate at least one area around the tunnel ventilation system.
  • a light unit can be used to ensure that there is sufficient light for the tunnel and / or shaft construction Construction work is available.
  • the light unit can, for example, be arranged on a fan housing.
  • the lighting unit can be designed to detect a presence of a user in an area around the tunnel ventilation system.
  • the lighting unit saves energy, in particular in different modes, for example in an operating mode for illuminating an environment or at least one area around the tunnel ventilation system and / or in a sensor mode for sensing a user in the vicinity of the tunnel ventilation system , is operated. Only when a user is detected in the vicinity of the tunnel ventilation system can the lighting unit be transferred to the operating mode for illuminating the surroundings or at least one area around the tunnel ventilation system.
  • the lighting unit can be operated in the sensor mode as an optical sensor unit which, for example, can have a light transmitter and a light receiver and, if necessary, corresponding evaluation and / or control electronics within the lighting unit.
  • the invention can provide a filter unit in a tunnel ventilation system in order to filter the air sucked in by the fan. In this way, sufficient air quality for the air you breathe during mining operations can be ensured.
  • the invention can provide a further filter unit in a tunnel ventilation system in order to filter the air in accordance with the requirements of a fuel cell unit.
  • the air can be provided to the fuel cell unit in a sufficient quality (sufficient oxygen content, no harmful dust particles, etc.).
  • the invention can provide that the at least one fan is designed to suck the air into a tunnel or to suck the air out of the tunnel. Sucking in air, for example from outside the tunnel into the tunnel, can serve to convey the fresh breathing air into the tunnel. The suction of air, for example from the tunnel to the outside, can serve to remove the dusty air from the tunnel, for example after a blast.
  • the at least one fan can advantageously have a protective grille. This reduces the risk of injury to the fan blades.
  • the at least one fan can have an adjusting system in order to adjust the air flow direction. Changing the air flow direction can help to switch the fan from suction to suction and to orientate the fan in general.
  • the invention can provide for a tunnel ventilation system that the at least one fan is designed to build up a pressure ratio between 1 and 1.3, in particular between 1 and 1.1, preferably 1.03, between an intake side and a pressure side. In this way, a sufficient current flow through the fan for exchanging the air can be ensured and at the same time the flow and noise during operation of the fan can be kept low.
  • the invention can provide that the at least one fan is designed as an axial fan.
  • An axial fan can be advantageous in order to convey the air along the tunnel or to align the direction of flow of the air along the tunnel.
  • the invention can provide for a tunnel ventilation system that the at least one fan is designed in such a way, in particular with large-area blades, in order to achieve a high speed at a relatively low speed between 1 to 10 revolutions per minute, in particular 1 to 3 revolutions per minute Volume flow of air from 40 to 100 m 3 per minute, preferably 70 to 100 m 3 per minute, to be conveyed.
  • efficient operation of the tunnel ventilation system can be made possible with a reduced background noise and an air flow that is not too disruptive.
  • the blades can be designed in such a way that the required amount of air at z. B. the number of people and / or devices and / or vehicles can be adjusted, for example increased.
  • the invention can provide a wheel system, in particular an extendable wheel system, in order to move the fan and / or the motor.
  • the wheel system can preferably be designed to drive on rails and / or on, for example, flat roads.
  • One motor can advantageously be provided for each of the plurality of fans.
  • a modular structure of the tunnel ventilation system can thus be made possible, so that a different number of fans can be set up flexibly at different locations. In principle, however, it is also conceivable that a common motor can be provided for several fans.
  • one fuel cell unit can be provided for each of the multiple motors.
  • a modular structure of the tunnel ventilation system can thus be made possible, so that a different number of fans can be set up flexibly at different locations.
  • a common fuel cell unit can be provided for several motors. In the case of a fuel cell unit, only one cable has to be laid to the respective motor in order to be able to supply several motors with electrical energy.
  • the tunnel ventilation system according to the invention can (at least in part) preferably be transported with the aid of a trailer, for example in the form of a trolley.
  • the trailer can have a coupling in order to connect the trailer to a work machine.
  • the trailer can preferably have wheels which are suitable, for example, for driving on rails and / or on roads.
  • the object according to the invention is achieved by a method for ventilating tunnels and / or shaft systems with the aid of a tunnel ventilation system, which can in particular be designed as described above, comprising: at least one fan for sucking in and / or sucking out air and a motor for driving the fan.
  • the motor is driven with the aid of a fuel.
  • the Figures 1 and 2 each show an exemplary embodiment of a tunnel ventilation system 100 according to the invention.
  • the tunnel ventilation system 100 according to FIG the Figures 1 and 2 What is common is that at least one fan 10 for sucking in and / or sucking off air and one motor 20 for driving the fan 10 are provided within the framework of the system.
  • the invention provides that the engine 20 is powered by a fuel H2, in particular hydrogen, (directly according to FIG Figure 2 or indirectly according to the Figure 1 ) is driven.
  • a fuel H2 in particular hydrogen
  • the engine 20 can be used as an internal combustion engine 22, e.g. B. in the form of a gasoline engine or a gas turbine.
  • the internal combustion engine 22 burns the fuel H2, for example in the form of hydrogen, directly in order to drive the fan 10.
  • the motor 20 can be designed as an electric motor 21 which is supplied with electrical energy by a fuel cell unit 30.
  • the fuel cell unit 30 converts the fuel H2, for example in the form of hydrogen, and an oxygen-containing reactant, for example in the form of simple ambient air, into electrical energy and water.
  • a cable 33 is passed between the fuel cell unit 30 and the motor 20 in order to supply the motor 20 with electrical energy.
  • the fuel cell unit 30 can have a modular structure.
  • a fuel cell unit 30 enables environmentally friendly energy generation.
  • a modular fuel cell unit 30 can advantageously be put together flexibly depending on the desired application and / or the available installation space.
  • the modules can easily be exchanged, for example for the purpose of maintenance.
  • a water excretion reservoir 32 can furthermore be provided in order to collect the product water as a result of an electrochemical reaction in the fuel cell unit 30 and to make it available as required, for example to moisten the membrane (s) of the fuel cell unit 30 can.
  • the water excretion reservoir 32 can have a return path, not shown, to the fuel cell unit 30.
  • At least one electrical connection 31, for example in the form of a socket, can furthermore be provided in order to be able to supply at least one further consumer, for example a drill, in addition to the motor 20 with electrical energy.
  • the fuel cell unit 30 according to FIG Figure 1 have a temperature control system T in order to control the temperature of the fuel cell unit 30 to a suitable operating temperature, that is to say to heat it up and / or to cool it.
  • the engine 20 in particular in the form of an internal combustion engine, can have an output shaft W2, which is in a mechanical operative connection, for example via a gearbox, with an input shaft W1 of the fan 10 or can be connected directly to the input shaft W1 of the fan 10.
  • a starter generator SG can be provided to crank the engine 20 (in its function as a starter) or to support the motor 20 in driving the fan 10 and / or (in its function as a generator) an electrical energy store E to charge, for example.
  • an electrical energy store E to charge, for example.
  • an electrical energy store E may be provided to the motor 20 in the case of Figure 1 to be supplied with electrical energy in the event of failure or when refueling the fuel cell unit 30 and / or in the case of the Figure 2 to accelerate the engine 20 via a starter generator SG.
  • a sensor unit 40 can be provided in order to sense the fuel content in the air adjoining the tunnel ventilation system 100 and / or to examine the air quality of the air adjoining the tunnel ventilation system 100 for respiratory quality.
  • a fuel tank 23, in particular of modular construction, can be provided for the fuel H2, preferably with several exchangeable tank bottles.
  • the fuel tank 23 or the tank bottles can be used for storing fuel H2 in gaseous form under pressure, for example in pressure tanks, for storing fuel H2 in liquid form, for example in tanks with appropriate cooling, or for storing fuel H2 in ion form, for example in a metal grid with appropriate heating.
  • an oxygen tank 24 can be provided in order to supply the fuel cell unit 30 with an oxygen-containing reactant.
  • a control unit 50 can be provided which is designed to control the tunnel ventilation system 100, in particular the fan 10 and / or the motor 20, depending on input commands from a user and / or depending on sensor data from a sensor unit 40, in particular automatically and / or autonomously , head for.
  • the control unit 50 can have a user interface (not shown), for example in the form of a touch display and / or a key input field, e.g. B. have on a fan housing.
  • a user can use the user interface to enter manual commands, select automatic programs or switch to autonomous operation by the control unit 50.
  • the tunnel ventilation system 100 can according to the two Figures 1 and 2 have a lighting unit 60 in order to illuminate at least one area around the tunnel ventilation system 100.
  • the lighting unit 60 can also be designed to detect a presence of a user in an area around the Capture tunnel ventilation system 100 around.
  • the lighting unit 60 can be attached to a fan housing, for example.
  • a dedicated control unit can be provided for the lighting unit 60 or the control unit 50 of the tunnel ventilation system 100 can be designed.
  • the tunnel ventilation system 100 according to both Figures 1 and 2 have a filter unit F1 in order to filter the air sucked in by the fan 10 in accordance with the requirements of breathing air.
  • tunnel ventilation system 100 according to FIGS Figures 1 and 2 have a further filter unit F2 in order to filter the air according to the requirements of a fuel cell unit 30.
  • a protective grille 11 can be provided in order to reduce the risk of injury to the rotor blades of the fan 10.
  • the fan 10 can have an adjusting system (not shown) in order to change the direction of air flow for the purpose of sucking in or sucking in and for orienting the fan in general.
  • the fan 10 under the Figures 1 and 2 can, for example, be designed as an axial fan in order to convey the air along the tunnel or to align the direction of flow of the air along the tunnel.
  • FIG. 1 and 2 show that the invention can provide a, in particular extendable, wheel system R in a tunnel ventilation system 100 in order to move the fan 10 and / or the motor 20 individually or together.
  • FIG. 3 shows, several fans 10 can be provided within the scope of a tunnel ventilation system 100 according to the invention, which for example can be arranged one behind the other in order to cover the fresh air requirement along the tunnel and to improve the flow characteristic of the overall system.
  • a motor 20 can be provided for each of the plurality of fans 10. In principle, however, it is also conceivable that a common motor 20 can be provided for several fans 10.
  • one fuel cell unit 30 can be provided for each of the plurality of motors 20.
  • a common fuel cell unit 30 can be provided for several motors 20.
  • a cable 33 for each of the plurality of motors 20 can thereby be passed through from the fuel cell unit 30.
  • a trailer 101 for example in the form of a trolley, can be provided, which is designed to transport the fan 10 and / or the motor 20 of the tunnel ventilation system 100.
  • the trailer 101 can have a coupling 102 for connection to a work mesh 110 traveling on rails.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fuel Cell (AREA)
EP20201241.5A 2019-10-11 2020-10-12 Installation d'aération de tunnel Pending EP3805566A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019127517 2019-10-11
DE102020119263.0A DE102020119263A1 (de) 2019-10-11 2020-07-21 Tunnelbelüftungsanlage

Publications (1)

Publication Number Publication Date
EP3805566A1 true EP3805566A1 (fr) 2021-04-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20201241.5A Pending EP3805566A1 (fr) 2019-10-11 2020-10-12 Installation d'aération de tunnel

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EP (1) EP3805566A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128036A (en) * 1960-10-17 1964-04-07 Le Roy C Mcbride Machine to generate and control an airstream
ITRM20090400A1 (it) * 2009-07-29 2011-01-30 Gruppofor S R L Sistema integrato di continuita energetica e ventilazione per tunnel stradali
DE102011013015A1 (de) * 2011-03-03 2012-09-06 Jens Bader Druckbelüfter zur Brandbekämpfung
US20160214487A1 (en) * 2013-08-30 2016-07-28 Autonomous Tractor Corporation Hybrid electric drive system and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128036A (en) * 1960-10-17 1964-04-07 Le Roy C Mcbride Machine to generate and control an airstream
ITRM20090400A1 (it) * 2009-07-29 2011-01-30 Gruppofor S R L Sistema integrato di continuita energetica e ventilazione per tunnel stradali
DE102011013015A1 (de) * 2011-03-03 2012-09-06 Jens Bader Druckbelüfter zur Brandbekämpfung
US20160214487A1 (en) * 2013-08-30 2016-07-28 Autonomous Tractor Corporation Hybrid electric drive system and method

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