EP0697048A1 - Procede permettant d'empecher la formation de brouillard sur une section de terrain ou de le dissiper et systeme permettant la mise en uvre dudit procede - Google Patents

Procede permettant d'empecher la formation de brouillard sur une section de terrain ou de le dissiper et systeme permettant la mise en uvre dudit procede

Info

Publication number
EP0697048A1
EP0697048A1 EP94912463A EP94912463A EP0697048A1 EP 0697048 A1 EP0697048 A1 EP 0697048A1 EP 94912463 A EP94912463 A EP 94912463A EP 94912463 A EP94912463 A EP 94912463A EP 0697048 A1 EP0697048 A1 EP 0697048A1
Authority
EP
European Patent Office
Prior art keywords
water
air
temperature
fog
nozzle arrangements
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.)
Ceased
Application number
EP94912463A
Other languages
German (de)
English (en)
Inventor
Johann Vielberth
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.)
Institut fur Entwicklung und Forschung Dr Vielberth KG
Original Assignee
Institut fur Entwicklung und Forschung Dr Vielberth KG
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 DE4319850A external-priority patent/DE4319850C2/de
Application filed by Institut fur Entwicklung und Forschung Dr Vielberth KG filed Critical Institut fur Entwicklung und Forschung Dr Vielberth KG
Publication of EP0697048A1 publication Critical patent/EP0697048A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H13/00—Dispersing or preventing fog in general, e.g. on roads, on airfields

Definitions

  • the invention relates to a method according to the preamble of claim 1 and to a system for performing this method according to the preamble of claim 9.
  • a method for removing ground fog in the area of a landing or take-off runway for aircraft is known (EP 0 169 746).
  • water is injected into the air volume above the runway via nozzles, which are provided on the long sides of the runway, with the aim of eliminating the fog droplets present in the air by collision and combination with the sprayed water to remove from the air and thereby cause the ground fog to dissolve.
  • the water applied has a temperature which is equal to the temperature of the fog air.
  • the dissolution of fog by collision and combination of the fog droplets with the sprayed water which is the aim of the known method, requires a large amount of water.
  • a system for preventing or eliminating fog is carried out according to the characterizing part of claim 9.
  • the ground mist is not dissolved by a collision and / or union between the mist droplet and the sprayed water, but by dehumidification of the relevant air volume or air body.
  • the sprayed water the temperature of which is significantly below the temperature of the dew point of the air in the air volume or below the temperature of the water vapor present in this air volume, forms finely divided water drops on which the water component of the mist air condenses, so that this part of the water is extracted from the mist air or the air body and discharged with the sprayed water.
  • the vapor pressure in the air body drops below the saturation pressure, as a result of which the mist or water droplets forming the mist can evaporate in the air volume and dissolve.
  • the application or spraying of the water can take place, for example, directly over the section of the terrain over which the dissolution of the mist is desired.
  • the method and system according to the invention are not only suitable for eliminating fog, but can also be used preventively, namely before the temperature conditions and the air humidity change expected fog forms.
  • vaporous part of the atmospheric moisture is condensed in the applied water and thus moisture is extracted from the air body, so that the relative humidity is reduced and is kept well below 100% atmospheric humidity (dew point).
  • the air body is not cooled by the evaporation of fog or water droplets. If the air body freed from the mist or treated preventively to prevent mist formation is warmed, for example by heat radiation, this results in a further reduction in the relative air humidity.
  • the advantage of the method or system according to the invention is, inter alia, in that an effective prevention of fog formation or an effective removal of fog is possible with a relatively small amount of water applied.
  • FIGS. 1-4 in a simplified representation an airfield with spray devices provided on this airfield for dispensing water, specifically with these spray devices in different positions; 5 shows a simplified perspective schematic representation of the airfield of FIGS. 1-4;
  • FIG. 10 in a representation similar to FIG. 1, a further possible embodiment of the system according to the invention or of an airfield equipped with this system.
  • 1 is a landing and / or runway for aircraft 2 formed by a concrete runway.
  • a strip-like edge area 3 is formed on both sides of the runway 1, which is also concreted or manufactured in another way in such a way that water can collect on the surface of the areas 3 and flow into a collecting channel 4 without this water or a considerable part of it gets into the ground.
  • the processing system 5 is connected via pumps, not shown, and via a system of supply lines 6 to a plurality of nozzle arrangements 7 and 8, which are provided distributed over the areas 3, namely the nozzle arrangements 7 directly at the bottom of the respective area 3 with little Distance from the runway 1 and the nozzle arrangements 8 on masts, which are provided at a greater distance from the runway 1 at the areas 3.
  • At least the nozzle arrangements 8 each have a plurality of water outlet nozzles in the embodiment shown.
  • the nozzle arrangements 7 and 8 are further designed so that the direction of action of the nozzles there can be changed.
  • the nozzle arrangements 7 and 8 have, for example, servomotors or actuators with which the orientation of the nozzles can be changed.
  • the nozzle arrangements 7 and 8 are assigned valves with which these nozzle arrangements can be opened and closed individually or in groups and the amount of water exiting per unit time can be changed.
  • the nozzle arrangements 7 can also each be designed in such a way that they have nozzles which are oriented in different directions, with the emerging water then being fed to that nozzle or those nozzles through control valves which ensure the desired orientation for the emerging water jets 10 or 11.
  • At least the water jets 10 are oblique directed upwards.
  • the water jets 11 are in the illustrated embodiment. directed essentially to the side in the horizontal direction, so that the water jets 10 capture the upper area of the air body to be freed from the mist and the water jets 11 capture the lower area of this air body.
  • water is sprayed over the nozzle arrangements 7 and 8 over a certain period of time in an area above the runway 1.
  • This water has a temperature that is clear, i.e. for example 10 ° C or more below the temperature of the fog air.
  • the returned water is slightly warmed but is still at a temperature significantly below the temperature of the ambient air.
  • the returned water is treated and cooled in the treatment plant.
  • a certain cooling of the air body takes place through energy withdrawal.
  • the fog-free air body has a lower temperature than the air surrounding this air body, so that the fog-free air body, provided that there is no air flow, is stable and in particular remains near the ground.
  • the amount of water required in the process according to the invention is relatively small .
  • the amount of water is determined by the heat of condensation to be removed from the separated water.
  • FIG. 1 shows the orientation of the nozzle arrangements 7 and 8 and the water jets 10 and 11 in a case in which there is no tendency for the volume of air freed from the mist to evade.
  • the nozzle arrangements 7 and 8 and thus the water jets 10 and 11 are oriented or aligned in order to avoid the fog-free air body to the right (Fig. 2) or to the left (Fig. 3) to prevent spraying.
  • 4 shows, as a further example, the actuation of the nozzle arrangement 7 and 8 in such a way that these nozzle arrangements are only activated on one side of the runway.
  • the water discharged via the nozzle arrangements 7 and 8 flows via the runway 1 inclined towards the collecting troughs 4 as well as via the areas 3 likewise inclined towards these troughs and reaches the treatment plant 5 via the sewer pipes 4.
  • an anti-freeze is added to the water discharged via the nozzle arrangements 7 and 8.
  • This admixture takes place either before the water emerges from the nozzle arrangements 7 and 8, for example at the treatment plant 5 or in the supply system, or immediately when the water emerges from the nozzle arrangements. In the latter case, these nozzle arrangements have additional nozzles with which the antifreeze is introduced into the water jets 10 and 11. An environmental impairment or soil contamination by the antifreeze is prevented by the fact that all of the applied water is fed via the collecting troughs 4 and sewer pipes 4 'to the treatment plant 5 and used again.
  • the method described above for removing ground fog is particularly effective when the runway 1 is located in a depression which excludes or largely excludes air currents. If such a sink is not given by natural geographic conditions, this can be achieved by means of ramparts or in the simplest case by walls 12 which are provided at least on both sides of the areas 3, so that the runway 1 is located in an artificial depression or gutter.
  • the nozzle arrangements 7 and 8 can be used. In the embodiment according to FIG. 6, only the nozzle arrangements 7 are provided. In the embodiment according to FIG. 7, the nozzle arrangements 8 are provided directly on the outer walls 12, partly on the smaller masts 9 and partly also on larger masts 9 '. In particular, the larger masts 9 'can also be arranged outside the walls 12 or outside the channel-like depression bounded by these walls.
  • FIG. 8 Such an arrangement is shown in FIG. 8 for a road with a multi-lane roadway 13, to which in turn the edge regions 3 are connected on both sides, a collecting channel 4 being provided between each edge region 3 and the roadway 13.
  • FIG. 9 shows a space 15 surrounded by buildings 14, which is to be kept fog-free at least during certain times.
  • a number of masts 9 ' are provided on the square 15, each carrying a nozzle arrangement 8 in the region of their upper end, so that the water jets 11 emerging from the nozzle arrangements 8 can in turn remove the mist in the manner described above .

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)

Abstract

L'invention concerne un nouveau procédé permettant d'empêcher la formation de brouillard sur une section de terrain (1) ou de le dissiper, par exemple sur une piste d'atterrissage et/ou une piste d'envol pour avions (2), une chaussée, une partie de route ou une aire de stationnement, etc. Selon ce procédé, de l'eau est pulvérisée par l'intermédiaire de plusieurs buses (7, 8) dans un volume d'air ou un corps d'air, sur la section de terrain (1) concernée pour former des gouttes d'eau finement réparties. L'invention concerne par ailleurs un nouveau système permettant la mise en ÷uvre dudit procédé.
EP94912463A 1993-04-30 1994-04-16 Procede permettant d'empecher la formation de brouillard sur une section de terrain ou de le dissiper et systeme permettant la mise en uvre dudit procede Ceased EP0697048A1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE4314194 1993-04-30
DE4314194 1993-04-30
DE4318762 1993-06-05
DE4318762 1993-06-05
DE4319850 1993-06-16
DE4319850A DE4319850C2 (de) 1993-04-30 1993-06-16 Verfahren zur Verhinderung oder Beseitigung von Nebel über einem Geländeabschnitt
PCT/DE1994/000423 WO1994025685A1 (fr) 1993-04-30 1994-04-16 Procede permettant d'empecher la formation de brouillard sur une section de terrain ou de le dissiper et systeme permettant la mise en ×uvre dudit procede

Publications (1)

Publication Number Publication Date
EP0697048A1 true EP0697048A1 (fr) 1996-02-21

Family

ID=27205030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94912463A Ceased EP0697048A1 (fr) 1993-04-30 1994-04-16 Procede permettant d'empecher la formation de brouillard sur une section de terrain ou de le dissiper et systeme permettant la mise en uvre dudit procede

Country Status (4)

Country Link
US (1) US5810248A (fr)
EP (1) EP0697048A1 (fr)
CA (1) CA2161701A1 (fr)
WO (1) WO1994025685A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010000221A (ko) * 2000-08-24 2001-01-05 황인철 배기가스확산 방지용 살수기가 설치된 도로
KR20030006097A (ko) * 2001-07-11 2003-01-23 찰스우리 안개 제거 시스템
DE10135400B4 (de) * 2001-07-25 2005-06-16 Möller, Detlev, Prof. Dr. Verfahren und Vorrichtung zur Auflösung von Nebel und/oder von Wolken
KR101214971B1 (ko) 2010-10-05 2012-12-24 김춘산 항공기 이착륙 성능향상장치
US9103497B1 (en) 2011-07-27 2015-08-11 Robert E. Bernert, Jr. Elimination of fog formation during ambient air regasification of liquefied natural gas
GB2497778A (en) * 2011-12-21 2013-06-26 Uyioghosa Leonard Igie Reducing aero-engine emissions within an airport
CN103643651B (zh) * 2013-12-20 2015-08-05 甘肃欣庆环保科技有限责任公司 一种消除大范围雾霾的方法
AU2015235894B2 (en) * 2014-03-28 2017-12-07 Schertz Aerial Service, Inc. Spraying system and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE649612A (fr) *
FR649612A (fr) * 1927-02-28 1928-12-26 Ac Spark Plug Co Perfectionnement aux mécanismes de commande des compteurs de vitesse
US2052626A (en) * 1933-06-05 1936-09-01 Massachusetts Inst Technology Method of dispelling fog
US3598313A (en) * 1969-10-28 1971-08-10 Fairchild Hiller Corp Fog removal and prevention method utilizing cool dry air
CH564129A5 (fr) * 1972-05-19 1975-07-15 Linde Ag
US4781326A (en) * 1984-07-23 1988-11-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Warm fog dissipation using large volume water sprays

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9425685A1 *

Also Published As

Publication number Publication date
US5810248A (en) 1998-09-22
CA2161701A1 (fr) 1994-11-10
WO1994025685A1 (fr) 1994-11-10

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