Fluid sprinkling – spraying – and diffusing – Processes – Of weather control or modification
Patent
1995-10-12
1998-09-22
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Processes
Of weather control or modification
239 141, 244114R, A01G 1500, E01H 1300
Patent
active
058102485
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method according to the generic clause of claim 1, as well as to a system for the performance of this method according to the generic clause of claim 7.
A method for the elimination of ground fog in the region of a landing or takeoff strip for aircraft has been disclosed (EP 0,169,746). In this known method, water is sprayed into the air volume over the takeoff strip through nozzles which are provided at the longitudinal sides of the strip, specifically, for the purpose of removing the fog droplets present in the air from the air by collision and combination with the sprayed water and thereby causing dispersal of the ground fog. In this known method, the discharged water has a temperature that is equal to the temperature of the fog air. The dispersal of fog sought by the known method through collision and combination of fog droplets with the sprayed water requires a great quantity of water.
In addition, a method for the dispersal of fog, wherein a hygroscopic material, which may be in the form of either powder or liquid, is discharged into the body of air, is likewise known (U.S. Pat. No. 2,052,626).
The object of the invention is to demonstrate a method by which elimination of fog, but alternatively even prevention of fog formation, is possible in particularly effective fashion.
To accomplish this object, a method according to the characterizing portion of claim 1 has been developed.
A system for the prevention or elimination of fog is designed according to the characterizing portion of claim 7.
In the method and/or system according to the invention, the dispersal of ground fog is effected not by the collision and/or combination of fog droplets and sprayed water, but by the removal of moisture from the respective air volume or body of air. The sprayed water, whose temperature lies distinctly below the temperature of the dew point of the air of the air volume or below the temperature of the water vapor present in this air volume, forms finely divided drops of water on which the water portion of the fog/air present as water vapor condenses, so that this water portion is removed from the fog/air or the body of air and carried away with the sprayed water. Removal of the moisture present in the body of air as water vapor causes the vapor pressure in the body of air to drop below the saturation pressure, as a result of which the droplets of fog or water forming the fog in the air volume are able to evaporate and disperse.
Upon the condensation of water vapor on the discharged or sprayed water, thermal energy is given off to the sprayed water quantity, which (thermal energy) is carried away with this water, specifically, preferably to a water-processing facility, in which cooling of the recycled water also takes place.
Evaporation of the fog and/or water droplets (droplet-like portion of the moisture in the air) forming the fog produces, through removal of energy, a certain degree of cooling of the body of air, with the result, inter alia, that this cooler, fog-free body of air remains lying in a relatively stable condition over the ground or terrain and thus is kept where a fog-free space is desired.
Under the invention water may be discharged or sprayed directly over, for example, the terrain over which the dispersal of fog is desired. In principle, however, it is alternatively possible to discharge or spray water in one or more regions which are adjacent to the terrain, and in this case, too, condensation of the vaporous portion of the moisture in the air on the sprayed or discharged water causes a reduction of the vapor pressure in the body of air and hence evaporation of the droplet-like portion of the moisture in the air not only in the region in which the water is discharged, but also over the adjacent terrain over which the fog is to be dispersed or eliminated.
The method and system according to the invention are suitable not only for the elimination of fog, but alternatively may be used preventively, specifically, before fog that is anticipated is formed because of temperature
REFERENCES:
patent: 2052626 (1936-09-01), Houghton
patent: 3598313 (1971-08-01), Plattner
patent: 3851822 (1974-12-01), Pocrnja et al.
patent: 4781326 (1988-11-01), Keller
Evans Robin O.
Institut fur Entwicklung und Forschung Dr. Vielberth KG
Kashnikow Andres
LandOfFree
Method for the prevention or elimination of fog over a terrain, does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the prevention or elimination of fog over a terrain, , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the prevention or elimination of fog over a terrain, will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1615642