EP0333562A1 - Verfahren und Vorrichtung zur Be- und Entlüftung von Räumen durch Einblasen von Luft bei Vorhandensein von schlecht verteilten Hindernissen - Google Patents

Verfahren und Vorrichtung zur Be- und Entlüftung von Räumen durch Einblasen von Luft bei Vorhandensein von schlecht verteilten Hindernissen Download PDF

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Publication number
EP0333562A1
EP0333562A1 EP89400657A EP89400657A EP0333562A1 EP 0333562 A1 EP0333562 A1 EP 0333562A1 EP 89400657 A EP89400657 A EP 89400657A EP 89400657 A EP89400657 A EP 89400657A EP 0333562 A1 EP0333562 A1 EP 0333562A1
Authority
EP
European Patent Office
Prior art keywords
assembly
air
obstacles
flow
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89400657A
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English (en)
French (fr)
Inventor
Paul Barroyer
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.)
Neu SA
Original Assignee
Neu SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Neu SA filed Critical Neu SA
Publication of EP0333562A1 publication Critical patent/EP0333562A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow

Definitions

  • the invention relates to ventilation systems for large enclosures for which the sealed connection of one or more sources of air propulsion is made difficult by the large size of the openings, and by the presence of perfectly defined obstacles. in the space of these openings which interfere with the proper functioning of the air induction devices.
  • the cars are generally open at both ends by wide openings to allow passage of vehicles and space to ventilating is long and congested by the motor vehicle section.
  • the thrusts necessary for the sanitation of large enclosures are generally quite high, typically from 1,000 to 10,000 N. These thrusts can be obtained effectively by an injector device with concentric annular sections, each of them playing the role of injector for gas from the injector immediately downstream (French patent n ° 82 12339 dated 15.07.82, MG Toussaint, CFR and European patent application n ° 83401472.2 dated 18.07.83).
  • the gas pressures to be used are nevertheless high (several bars) and the presence of an obstacle in front of the last jet is the cause of an important reduction in the efficiency of the system.
  • the movement of air in a small enclosure is done by injecting compressed air into multiple injectors to replace the conventional source of ventilation deemed noisy (M. Campagnolo, KAMAR SNC of Campagnolo Mario & Co., European Patent Application No. 85.109 175. 1, 23.07.85), but again; compressed air is required and nothing is provided if necessary for an obstacle in front of the injectors.
  • the object of the invention is to eliminate the above drawbacks by providing induction ventilation of enclosures which is highly efficient despite the large size of the enclosures and the presence in them of poorly distributed obstacles.
  • the invention consists in ensuring a judicious distribution of the aerodynamic thrust, in order to allow the development of induction jets which retain all their drive efficiency around the obstacle which they surround.
  • This distribution is ensured over several sections of suitable dimensions located at a suitable distance from the obstacles and separated from each other by an appropriate distance.
  • the invention consists of a device for injecting gas into a volume 1 delimited by a wall 2 open at one 3 or the other or at both ends. It is, for example, inside a railway wagon 1 or a gas tank delimited by the walls, parallelepiped of the wagon 2 or cylindrical of the tank not shown, in which the opening was made 3. The interior of this enclosure is occupied by an obstacle 4 of non-negligible size compared to the whole of its volume.
  • the induction device In front of the opening 3 or more or less inserted therein, is arranged the induction device whose total section S, calculated as indicated above, is distributed between at least two injectors 5 whose individual sections have any shape , for example circular, or preferably rectangular, or in circular crown sectors, vertically elongated and arranged laterally.
  • HW S / 2
  • these two or more injectors 5 have the particularity of having their injection opening situated at a distance L from the front face of the obstacle 4, determined approximately by the relation: L ⁇ ⁇ Qo / 1.76 (3) whose representative curve is illustrated in FIG. 3. We see that this minimum distance is only a function of the injected flow rate Qo.
  • the spacing E between two successive injectors 5 is a function of their width W along the series of curves in FIG. 4, each established by a value of the flow rate Qo injected; this is again a minimum value defined approximately by the relation: E ⁇ ⁇ Qo / 6.3 + W (4)
  • the injection device consists of two vertical vents of rectangular section 5 connected to a gas intake plenum 6 equipped with directive devices 7 for the flow of these gases, so as to minimize the energy losses during flow while distributing the flow rates in the two orifices 5 under the best possible conditions.
  • the plenum 6 and the injectors 5 in this case surround the cockpit 8 of the carrier vehicle whose chassis 8a supports the mobile assembly.
  • this cockpit 8 which can also be located in another more suitable place of the assembly, are located the commands for maneuvering the motor vehicle and also the control devices for the assembly of the ventilation unit according to the 'invention.
  • a protective casing 9 of gas preparation equipment 10 for example, as shown in FIG.
  • a gas burner whose fuel reserve 11 can be locate on the roof of plenum 6 ensuring gas distribution in the injectors.
  • a transformation piece 12 ensuring the connection between the circular air intake of a fan 13 and the box 9 containing the gas preparation device, generally of square section .
  • the fan 13 is preferably driven by a hydraulic clutch device 14 to which energy is communicated by a hydraulic line coming from a turbine 15 driven by the engine 16 of the vehicle.
  • the propulsion energy of the mobile vehicle can be implemented, either for the propulsion of the assembly, or for the propulsion of the gases in the injectors, or for the simultaneous operation of the two.
  • the driving of this fan 13 can be done by direct mechanical coupling, which can be engaged on the transmission shaft 17 of the motor vehicle which would then be of the mechanical propulsion type.
  • this drive can be carried out by means of an electric motor, the energy considered being either produced by an alternator driven by the propulsion engine of the assembly, or taken by connection to a central network.
  • the air or the gas are introduced into the fan by an inlet inlet 18 upstream, itself connected to a noise attenuation device 19 making it possible to admit the air, preferably axially, into the device.
  • induced air channels 20 are arranged through the plenum so as to allow the jets to be fed by their internal face in the case where the section above and below the set would not be sufficient. Lid 21 and horizontal lids 22 can, in this case, reduce the risk of gas recirculation towards the rear of the device.
  • centrifugal fan 23 draws air by optionally two suction outlets 24 inside a box 25 itself closed by a silencer device 26.
  • the gas injector assembly whether or not provided with equipment 10 for preparing these gases, can be handled by a handling device instead of being automotive.
  • the enclosure 2 to be ventilated has a predominantly cylindrical shape (tank)
  • injectors whose individual sections are no longer entirely rectangular, but curved, as shown in FIG. 9
  • the plenum 6 is then preferably of substantially cylindrical shape and the injection orifices 5 are in the form of circular crown sectors, the preceding approximate laws (3) and (4) remaining applicable to them.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP89400657A 1988-03-08 1989-03-08 Verfahren und Vorrichtung zur Be- und Entlüftung von Räumen durch Einblasen von Luft bei Vorhandensein von schlecht verteilten Hindernissen Withdrawn EP0333562A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802958 1988-03-08
FR8802958A FR2628514B1 (fr) 1988-03-08 1988-03-08 Procede et dispositif de ventilation et de purge d'enceintes par induction d'air en presence d'obstacles mal repartis

Publications (1)

Publication Number Publication Date
EP0333562A1 true EP0333562A1 (de) 1989-09-20

Family

ID=9364034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400657A Withdrawn EP0333562A1 (de) 1988-03-08 1989-03-08 Verfahren und Vorrichtung zur Be- und Entlüftung von Räumen durch Einblasen von Luft bei Vorhandensein von schlecht verteilten Hindernissen

Country Status (2)

Country Link
EP (1) EP0333562A1 (de)
FR (1) FR2628514B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658273A1 (fr) * 1990-02-15 1991-08-16 Imef Perfectionnement aux cellules autonomes de traitement de lots de produits sur palette ou conteneur.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844203A (en) * 1972-05-24 1974-10-29 K Takahashi Freight transporting container
US4241666A (en) * 1976-08-19 1980-12-30 Asea Aktiebolag Railway car electric traction motor air cooling system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844203A (en) * 1972-05-24 1974-10-29 K Takahashi Freight transporting container
US4241666A (en) * 1976-08-19 1980-12-30 Asea Aktiebolag Railway car electric traction motor air cooling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2658273A1 (fr) * 1990-02-15 1991-08-16 Imef Perfectionnement aux cellules autonomes de traitement de lots de produits sur palette ou conteneur.

Also Published As

Publication number Publication date
FR2628514B1 (fr) 1990-12-21
FR2628514A1 (fr) 1989-09-15

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