EP1296105A2 - Procédé pour ajuster la température à une buse de pulvérisation et de mélange ainsi qu'une buse de pulvérisation et de mélange - Google Patents

Procédé pour ajuster la température à une buse de pulvérisation et de mélange ainsi qu'une buse de pulvérisation et de mélange Download PDF

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Publication number
EP1296105A2
EP1296105A2 EP20020450213 EP02450213A EP1296105A2 EP 1296105 A2 EP1296105 A2 EP 1296105A2 EP 20020450213 EP20020450213 EP 20020450213 EP 02450213 A EP02450213 A EP 02450213A EP 1296105 A2 EP1296105 A2 EP 1296105A2
Authority
EP
European Patent Office
Prior art keywords
liquid
mixing
spray
line
mixing nozzle
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Withdrawn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
EP20020450213
Other languages
German (de)
English (en)
Inventor
Gerald Dipl.-Ing. Reisenauer
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.)
Hdp Hochdruckprodukte Maschinen und Apparatebau Gesmbh
Original Assignee
Hdp Hochdruckprodukte Maschinen und Apparatebau Gesmbh
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 Hdp Hochdruckprodukte Maschinen und Apparatebau Gesmbh filed Critical Hdp Hochdruckprodukte Maschinen und Apparatebau Gesmbh
Publication of EP1296105A2 publication Critical patent/EP1296105A2/fr
Withdrawn legal-status Critical Current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
    • F25C2303/048—Snow making by using means for spraying water
    • F25C2303/0481—Snow making by using means for spraying water with the use of compressed air

Definitions

  • the invention relates to a method for setting a temperature on a spray mixing nozzle to generate a spray from a liquid and a compressed gas, in particular from water and compressed air, the liquid being expanded by expanding the Compressed gas in a mixing area outside and / or inside the spray mixing nozzle is atomized and cooled, in particular for producing snow, at least one of which the mixing area of the outer part of the spray mixing nozzle of liquid, in particular water flows around the inside, and a spray-mixing nozzle for Generate a spray mist.
  • Spray mixing nozzles used for this create one Spray of an air-water mixture.
  • the mixing of air and water can outside the spray mixing nozzle (external mixing) or inside the spray mixing nozzle (Internal mixing) take place. Air is compressed in the spray mixing nozzle (1-8 bar) fed. When expanding in / on the spray mixing nozzle, the air cools due to the Joule-Thompson effect.
  • the water jet is one in the spray mixing nozzle through a very narrow channel Mixing chamber or a mixing area supplied so that when the water exits very small droplets (usually less than 50 ⁇ ) are formed. Due to the strong pressure drop in The water jet bursts up. The air that has cooled down significantly below freezing immediately freezes the small water droplets, and small solid ones form Ice crystals, so-called nucleators, used as nucleating agents for snow production become.
  • heating elements are disadvantageous because it increases the cost of the spray mixing nozzles leads and also increases the cost of snow production. Furthermore, in the event of an accident there is still a risk of icing of the heating elements.
  • a nozzle for snow production of the type described in the opening paragraph is known from US Pat. No. 3,923,246 known. With this nozzle, air is passed through openings in a bottom chamber of the nozzle Mixing chamber introduced into the water via a lying on the outer wall of the nozzle Ring channel is initiated. The air is distributed to the air in the floor chamber Mixing chamber leading openings. The bottom chamber in which the air is already expanding is unprotected to the outside, which can lead to icing.
  • the invention aims to avoid these disadvantages and difficulties and provides the task, a process and a spray mixing nozzle to achieve the To create procedures that make it possible to do without heating elements and Switch off the danger of icing 100%.
  • a preferred variant is characterized in that at least a subset of the atomizing liquid the mixing area and / or the adjacent outer part of the Spray-nozzle flows around.
  • a spray-mixing nozzle for generating a spray, in particular for generating Snow, with one inside and / or outside the spray mixing nozzle Mixing area in which a liquid line, in particular a water line, and a Compressed gas line, in particular a compressed air line, open, the mixing area at least in part and / or a directly adjacent area of the outer part of the Spray mixing nozzle from a liquid-carrying room connected to a Liquid inlet line and a liquid outlet line is connected is characterized according to the invention in that a centrally in the mixing area confluent liquid line is provided, the end region of a Compressed gas line is surrounded, which pressure gas line in the end area of the liquid-carrying room is surrounded.
  • the liquid-carrying space is preferably opposite the mixing area and / or the
  • the outer part of the spray mixing nozzle is delimited with a thin heat-conducting wall, whereby Expediently the liquid inlet and outlet lines as water inlet and outlet lines are trained.
  • the liquid access line opens into the Mixing area.
  • a liquid branch line preferably starts from the liquid line Liquid access line opens into the liquid-carrying space.
  • the liquid-carrying space is Can be fed with liquid regardless of the mixing room.
  • a nozzle body 1 is formed with a central water line 2 Provided liquid line in a mixing area 3, in the periphery of the water line 2 arranged compressed gas lines 4, in particular compressed air line 4, merges. Instead of several compressed air lines 4, the compressed air could also enter the ring nozzle Mixing area 3 are supplied.
  • the mixing area 3 which in a on the nozzle body 1st screwed air cap 5 is provided, there is mixing of air and Water and the very strong cooling described at the beginning.
  • 1 heating elements 6 are provided in the nozzle body.
  • Such heating elements 6 can be used in a mixing nozzle according to the invention of the inventive method can be avoided by ensuring that at least one outer part of the spray mixing nozzle adjacent to the mixing region 3 Water flows around inside.
  • a water access line 7 is provided decentrally in the nozzle body 1 and opens into one liquid-carrying space 8, d.
  • H. water-bearing space 8 in the air cap 5 is provided. Only after the air cap 5 and the mixing area 3 flow around by the water was, the water from the liquid-carrying space 7 passes through a Liquid outlet line 9 centrally via the water line 2 into the mixing area 3, in which as described above, the compressed air supply lines 4 open.
  • the heat content of the water to be sprayed is used as a heating medium, so that no additional heating elements are required.
  • the invention is based on the fact that the specific heat content of the water is relatively high and the heat transfer between metal and flowing water on the inside of the spray mixing nozzle is considerably more intense than the heat transfer on the outside between the air cap 5 and the outside air. Due to the internal washing around the air cap 5 and its mixing area 5 and optionally the nozzle body, heat is transferred from the water to the materials of the air cap 5 or to the nozzle body 1.
  • the heat transfer is sufficient to increase the outside wall temperatures of the nozzle body 1 and the air cap 5 above freezing point hold. This is favored by the high heat transfer coefficient of the water of approx. 2000 to 3000 W / (m 2 K) on the inside and the low heat transfer coefficient of the air of only 50 to 100 W / (m 2 K) on the outside.
  • the method according to the invention also works when only a partial stream of the Water for flushing around the inside of the air cap 5, the mixing area 3 and / or the Nozzle body 1 is used.
  • a water branch pipe 10 which as Liquid access line opens into the water-bearing room 8.
  • Liquid outlet line 9 which in turn opens into the central water line 2, so that the branched-off water is again available for snow production.
  • Fig. 4 is independent of the central water pipe a liquid flow for flushing around the inside of the air cap 5 or Mixing area 3 used.
  • FIG. 5 A variant of the invention for a spray-mixing nozzle with external mixing, i. H. With external mixing area 11 is illustrated in FIG. 5. According to this variant flushed the air cap 5.
  • the invention can be used for all spray mixing nozzles where there is a risk of icing exists, are used, not only with all snow guns.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
EP20020450213 2001-09-19 2002-09-19 Procédé pour ajuster la température à une buse de pulvérisation et de mélange ainsi qu'une buse de pulvérisation et de mélange Withdrawn EP1296105A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT14902001A AT411228B (de) 2001-09-19 2001-09-19 Verfahren zum einstellen einer temperatur an einer sprüh-mischdüse sowie sprüh-mischdüse
AT14902001 2001-09-19

Publications (1)

Publication Number Publication Date
EP1296105A2 true EP1296105A2 (fr) 2003-03-26

Family

ID=3688275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020450213 Withdrawn EP1296105A2 (fr) 2001-09-19 2002-09-19 Procédé pour ajuster la température à une buse de pulvérisation et de mélange ainsi qu'une buse de pulvérisation et de mélange

Country Status (2)

Country Link
EP (1) EP1296105A2 (fr)
AT (1) AT411228B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1645821A3 (fr) * 2004-10-08 2006-05-24 TechnoAlpin GmbH Tête de lance pour une lance à neige et ensemble de buses
CN115585588A (zh) * 2021-07-06 2023-01-10 中国科学院理化技术研究所 人工造雪装置及方法
DE102021130875A1 (de) 2021-11-25 2023-05-25 Schaeffler Technologies AG & Co. KG Strahlpumpe für ein Brennstoffzellensystem

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923246A (en) * 1974-07-11 1975-12-02 Oscar F Cloutier Method and apparatus for use in making snow

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1645821A3 (fr) * 2004-10-08 2006-05-24 TechnoAlpin GmbH Tête de lance pour une lance à neige et ensemble de buses
DE102004053984B3 (de) * 2004-10-08 2006-06-14 Technoalpin Gmbh Lanzenkopf für eine Schneelanze sowie Düsenanordnung
US7770816B2 (en) 2004-10-08 2010-08-10 Technoalpin Gmbh Lance head for a snow lance and nozzle arrangement
CN115585588A (zh) * 2021-07-06 2023-01-10 中国科学院理化技术研究所 人工造雪装置及方法
DE102021130875A1 (de) 2021-11-25 2023-05-25 Schaeffler Technologies AG & Co. KG Strahlpumpe für ein Brennstoffzellensystem

Also Published As

Publication number Publication date
ATA14902001A (de) 2003-04-15
AT411228B (de) 2003-11-25

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