EP2244042A2 - Method for improving efficiency in technical snow production with low pressure snow cannons - Google Patents

Method for improving efficiency in technical snow production with low pressure snow cannons Download PDF

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Publication number
EP2244042A2
EP2244042A2 EP20100159912 EP10159912A EP2244042A2 EP 2244042 A2 EP2244042 A2 EP 2244042A2 EP 20100159912 EP20100159912 EP 20100159912 EP 10159912 A EP10159912 A EP 10159912A EP 2244042 A2 EP2244042 A2 EP 2244042A2
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EP
European Patent Office
Prior art keywords
snow
diffuser
diffusor
nozzle ring
adjustable
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Withdrawn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
EP20100159912
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German (de)
French (fr)
Inventor
Hans Wiesmeier
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP2244042A2 publication Critical patent/EP2244042A2/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C3/00—Processes or apparatus specially adapted for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Producing artificial snow
    • F25C3/04—Processes or apparatus specially adapted for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Producing artificial snow for sledging or ski trails; Producing artificial snow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2303/00—Special arrangements or features for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Special arrangements or features for producing artificial snow
    • F25C2303/046—Snow making by using low pressure air ventilators, e.g. fan type snow canons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2303/00—Special arrangements or features for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Special arrangements or features for producing artificial snow
    • F25C2303/048—Snow making by using means for spraying water

Definitions

  • Low-pressure snow cannons are probably the most used in snow production for ski slope snowmaking today. They consist of a tube in which an axial fan is located on the inlet side, and on the outlet side the water nozzles, which spray on the conveyed air jet. The cold ambient air makes the fine water droplets freeze to snow crystals, which then fall to the ground as snow.
  • the invention consists in that on the outlet side of the snow gun, a diffuser is mounted, which surrounds the emerging from the snow gun water-air mixture with a cold air jacket. By this diffuser more air is conveyed, and it can be sprayed at the same energy more water in the air jet, resulting in a higher snow performance and more efficiency in snow production.
  • the Fig. 2 shows a low pressure snow gun according to the invention consisting of a snow pipe 1, an axial fan 2, which is mounted in the inlet region of the snow pipe 1, a nozzle ring 3, and Nucleusdüsen 10, wherein after the nozzle ring 3, a first diffuser 4 with a, spaced from the snow pipe 1, funnel-shaped extension is arranged. Furthermore, an adjusting device 5 for the snow gun, and a supply line 11 for a water-air mixture to the Nukelusdüsen 10 is provided.
  • a second diffuser 9 is provided, which is arranged in front of the nozzle ring 3 in the air flow direction, and the nucleus nozzles 10 are arranged in the air flow direction in front of the second diffuser 9.
  • the invention thus consists in that the second cutting diffuser 9 draws a coat of dry air 7 over the air stream 6 moistened by the nucleus nozzles 10, so that the water sprayed via the nucleus nozzles 10 does not freeze on the wall of the snow pipe 1 (see FIG Fig. 2 ).
  • the following nozzle ring 3 with the water nozzles remains.
  • the diameter of the first diffuser 4 at its narrowest point at the inlet, and the diameter of the first diffuser 4 at the outlet may be adjustable. Furthermore, the first diffuser 4 can be adjustable in the axial direction, as well as in the radial direction to the main axis of the snow pipe 1.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)

Abstract

The cannon has an axial ventilator (2) mounted in an inlet area of a snow tube (1). A diffusor (4) is provided with an extension unit. The extension unit is provided at a distance from the snow tube. Another diffusor (9) is arranged in front of a nozzle collar (3) in an air flow direction. Nucleus nozzles (10) are arranged in front of the latter diffusor in the air flow direction. The former diffusor is adjustable in an axial direction and radial direction towards a main axis of the snow tube, where diameter of the former diffusor at an outlet is adjustable.

Description

Niederdruck-Schneekanonen werden heute in der Schneeproduktion für die Skipistenbeschneiung wohl am meisten verwendet. Sie bestehen aus einem Rohr, in dem sich eintrittseitig ein Axialgebläse befindet, und austrittseitig die Wasserdüsen, die auf den geförderten Luftstrahl sprühen. Die kalte Umgebungsluft lässt die feinen Wassertröpfchen zu Schneekristallen frieren, die dann als Schnee zu Boden fallen.Low-pressure snow cannons are probably the most used in snow production for ski slope snowmaking today. They consist of a tube in which an axial fan is located on the inlet side, and on the outlet side the water nozzles, which spray on the conveyed air jet. The cold ambient air makes the fine water droplets freeze to snow crystals, which then fall to the ground as snow.

Bekannte Ausführungsformen von Schneekanonen dieser Art werden etwa in den Druckschriften SU 1 668 831 , DE 699 30 116 , DE 44 23 124 , SU 951 031 und US 4 473 186 beschrieben.Known embodiments of snow cannons of this type are disclosed for example in the documents SU 1 668 831 . DE 699 30 116 . DE 44 23 124 . SU 951 031 and US 4,473,186 described.

Aufgrund der hohen Energiepreise ist die Effizienzsteigerung bei der Schneeproduktion ein Gebot der Stunde.Due to the high energy prices, increasing the efficiency of snow production is the order of the day.

Die Erfindung besteht darin, dass austrittseitig an die Schneekanone ein Diffusor angebaut wird, der das aus der Schneekanone austretende Wasser-Luft-Gemisch mit einem Mantel kalter Luft umgibt. Durch diesen Diffusor wird mehr Luft gefördert, und es kann dadurch bei gleichem Energieaufwand mehr Wasser in den Luftstrahl eingesprüht werden, was zu einer höheren Schneileistung und mehr Effizienz bei der Schneeerzeugung führt.The invention consists in that on the outlet side of the snow gun, a diffuser is mounted, which surrounds the emerging from the snow gun water-air mixture with a cold air jacket. By this diffuser more air is conveyed, and it can be sprayed at the same energy more water in the air jet, resulting in a higher snow performance and more efficiency in snow production.

Die Erfindung wird in weiterer Folge anhand der beiliegenden Zeichnungen näher erläutert. Es zeigen dabei die

  • Fig. 1 eine Schneekanone gemäß dem Stand der Technik, bei der ein Diffusor dem Düsenkranz und dem Schneirohr nachgeordnet ist, und die
  • Fig. 2 eine erfindungsgemäße Schneekanone mit einem zweiten Diffusor.
The invention will be explained in more detail with reference to the accompanying drawings. It shows the
  • Fig. 1 a snow cannon according to the prior art, in which a diffuser is arranged downstream of the nozzle ring and the snow pipe, and the
  • Fig. 2 a snow gun according to the invention with a second diffuser.

Stand der Technik ist, dass im Schneirohr 1 in Luftrichtung gesehen zuerst die Wasserdüsen des Düsenkranz 3 und danach die Nukleusdüsen 10 angeordnet sind (siehe Fig. 1). Dies wahrscheinlich deshalb, um Vereisung zu vermeiden, da immer zuerst der letzte Düsenkranz 3 eingeschaltet wird, und erst danach die davor liegenden (in Luftrichtung gesehen).The state of the art is that in the snow pipe 1 seen in the direction of air first, the water nozzles of the nozzle ring 3 and then the Nucleus nozzles 10 are arranged (see Fig. 1 ). This is probably to avoid icing, as always the last nozzle ring 3 is turned on first, and only then the one before (seen in the direction of air).

Rein physikalisch gesehen wäre es aber besser, zuerst die Nukleusdüsen 10 zu haben (in Luftrichtung gesehen), die die Kristallisationskeime bilden, und auf diese mit den Wasserdüsen des Düsenkranz 3 zu sprühen, damit das eingesprühte Wasser an den Kristallisationskeimen anfriert und dadurch weniger freies Wasser entsteht. In der Folge soll dadurch die Qualität des Schnees 8 verbessert werden.From a purely physical point of view, it would be better to first have the nucleus nozzles 10 (viewed in the direction of air), which form the nuclei, and to spray them with the water nozzles of the nozzle ring 3, so that the sprayed water freezes on the crystallization nuclei and thereby less free water arises. As a result, the quality of the snow 8 is thereby to be improved.

Die Fig. 2 zeigt eine erfindungsgemäße Niederdruck-Schneekanone bestehend aus einem Schneirohr 1, einem Axialventilator 2, der im Eintrittsbereich des Schneirohres 1 montiert ist, einem Düsenkranz 3, sowie Nukleusdüsen 10, wobei nach dem Düsenkranz 3 ein erster Diffusor 4 mit einer, vom Schneirohr 1 beabstandeten, trichterförmigen Erweiterung angeordnet ist. Des Weiteren ist eine Verstelleinrichtung 5 für die Schneekanone, sowie eine Zuleitung 11 für ein Wasser-Luft-Gemisch zu den Nukelusdüsen 10 vorgesehen.The Fig. 2 shows a low pressure snow gun according to the invention consisting of a snow pipe 1, an axial fan 2, which is mounted in the inlet region of the snow pipe 1, a nozzle ring 3, and Nucleusdüsen 10, wherein after the nozzle ring 3, a first diffuser 4 with a, spaced from the snow pipe 1, funnel-shaped extension is arranged. Furthermore, an adjusting device 5 for the snow gun, and a supply line 11 for a water-air mixture to the Nukelusdüsen 10 is provided.

Erfindungsgemäß wird vorgeschlagen, dass ein zweiter Diffusor 9 vorgesehen ist, der in Luftströmungsrichtung vor dem Düsenkranz 3 angeordnet ist, und die Nukleusdüsen 10 in Luftströmungsrichtung vor dem zweiten Diffusor 9 angeordnet sind. Die Erfindung besteht somit darin, dass der zweite Schneidiffusor 9 einen Mantel aus trockener Luft 7 über den durch die Nukleusdüsen 10 befeuchteten Luftstrom 6 zieht, sodass das über die Nukleusdüsen 10 eingesprühte Wasser nicht an der Wand des Schneirohrs 1 festfriert (siehe Fig. 2). Der danach folgende Düsenkranz 3 mit den Wasserdüsen bleibt.According to the invention, it is proposed that a second diffuser 9 is provided, which is arranged in front of the nozzle ring 3 in the air flow direction, and the nucleus nozzles 10 are arranged in the air flow direction in front of the second diffuser 9. The invention thus consists in that the second cutting diffuser 9 draws a coat of dry air 7 over the air stream 6 moistened by the nucleus nozzles 10, so that the water sprayed via the nucleus nozzles 10 does not freeze on the wall of the snow pipe 1 (see FIG Fig. 2 ). The following nozzle ring 3 with the water nozzles remains.

Der Durchmesser des ersten Diffusors 4 an seiner engsten Stelle am Eintritt, sowie der Durchmesser des ersten Diffusors 4 am Austritt kann verstellbar sein. Des Weiteren kann der erste Diffusor 4 in axialer Richtung, sowie in radialer Richtung zur Hauptachse des Schneirohres 1 verstellbar sein.The diameter of the first diffuser 4 at its narrowest point at the inlet, and the diameter of the first diffuser 4 at the outlet may be adjustable. Furthermore, the first diffuser 4 can be adjustable in the axial direction, as well as in the radial direction to the main axis of the snow pipe 1.

Claims (3)

Niederdruck-Schneekanone bestehend aus einem Schneirohr (1), einem Axialventilator (2), der im Eintrittsbereich des Schneirohres (1) montiert ist, einem Düsenkranz (3), sowie Nukleusdüsen (10), wobei nach dem Düsenkranz (3) ein erster Diffusor (4) mit einer, vom Schneirohr (1) beabstandeten, trichterförmigen Erweiterung angeordnet ist, dadurch gekennzeichnet, dass ein zweiter Diffusor (9) vorgesehen ist, der in Luftströmungsrichtung vor dem Düsenkranz (3) angeordnet ist, und die Nukleusdüsen (10) in Luftströmungsrichtung vor dem zweiten Diffusor (9) angeordnet sind.Low-pressure snow gun consisting of a snow pipe (1), an axial fan (2), which is mounted in the inlet region of the snow pipe (1), a nozzle ring (3), and Nucleusdüsen (10), wherein after the nozzle ring (3) a first diffuser (4) is arranged with a funnel-shaped extension spaced from the snow pipe (1), characterized in that a second diffuser (9) is provided, which is arranged in front of the nozzle ring (3) in the air flow direction, and the nucleus nozzles (10) in FIG Air flow direction in front of the second diffuser (9) are arranged. Niederdruck-Schneekanone nach Anspruch 1, dadurch gekennzeichnet, dass der Durchmesser des ersten Diffusors (4) an seiner engsten Stelle am Eintritt, sowie der Durchmesser des ersten Diffusors (4) am Austritt verstellbar ist.Low-pressure snow gun according to claim 1, characterized in that the diameter of the first diffuser (4) at its narrowest point at the inlet, and the diameter of the first diffuser (4) is adjustable at the outlet. Niederdruck-Schneekanone nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der erste Diffusor (4) in axialer Richtung, sowie in radialer Richtung zur Hauptachse des Schneirohres (1) verstellbar ist.Low-pressure snow gun according to claim 1 or 2, characterized in that the first diffuser (4) in the axial direction, and in the radial direction to the main axis of the snow pipe (1) is adjustable.
EP20100159912 2009-04-14 2010-04-14 Method for improving efficiency in technical snow production with low pressure snow cannons Withdrawn EP2244042A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT5722009A AT508057B1 (en) 2009-04-14 2009-04-14 LOW PRESSURE SNOW CANNON

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EP2244042A2 true EP2244042A2 (en) 2010-10-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083330A2 (en) 2010-12-22 2012-06-28 Sufag Sport- Und Freizeitanlagen Gmbh Snow cannon
EP3040657A1 (en) * 2014-12-09 2016-07-06 Robert Krajnc Apparatus for making artificial snow

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU951031A1 (en) 1980-06-19 1982-08-15 Иркутский государственный научно-исследовательский институт редких и цветных металлов Unit for producing artificial snow
US4473186A (en) 1982-04-12 1984-09-25 Morton Alperin Method and apparatus for spraying
SU1668831A1 (en) 1989-07-19 1991-08-07 Ижевский механический институт Device for producing artificial snow
DE4423124A1 (en) 1994-07-01 1996-01-04 Eberhard Gall Snow cannon for ski slopes
DE69930116T2 (en) 1998-06-02 2006-11-09 Crea A/S SNOW CANNON

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU951031A1 (en) 1980-06-19 1982-08-15 Иркутский государственный научно-исследовательский институт редких и цветных металлов Unit for producing artificial snow
US4473186A (en) 1982-04-12 1984-09-25 Morton Alperin Method and apparatus for spraying
SU1668831A1 (en) 1989-07-19 1991-08-07 Ижевский механический институт Device for producing artificial snow
DE4423124A1 (en) 1994-07-01 1996-01-04 Eberhard Gall Snow cannon for ski slopes
DE69930116T2 (en) 1998-06-02 2006-11-09 Crea A/S SNOW CANNON

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083330A2 (en) 2010-12-22 2012-06-28 Sufag Sport- Und Freizeitanlagen Gmbh Snow cannon
EP3040657A1 (en) * 2014-12-09 2016-07-06 Robert Krajnc Apparatus for making artificial snow

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Publication number Publication date
AT508057A1 (en) 2010-10-15
AT508057B1 (en) 2012-01-15

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