CN107278735B

CN107278735B - Covering body and method for promoting rainfall in local area

Info

Publication number: CN107278735B
Application number: CN201610827761.3A
Authority: CN
Inventors: 林邦彦; 林争瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-04-11
Filing date: 2016-09-18
Publication date: 2020-01-10
Anticipated expiration: 2036-09-18
Also published as: CN107278735A; WO2017177357A1

Abstract

A cover for promoting rainfall in local area has an external skin for covering the field able to receive heat energy, and features that its edge is approximately at the height of field surface and its internal part can be lifted to form a space for containing air. So that the air inside receives heat energy and the heat energy inside and outside is blocked by the outer skin to reduce the transmission of heat energy to the outside, thereby causing the difference between the inside and outside temperatures. The buoyancy generated by the air with higher temperature inside and outside is utilized to push up the part inside the edge of the outer skin, so that a huge space is formed between the outer skin and the field surface to contain a huge amount of air, and then the heat energy is continuously received to store the huge amount of heat energy in the air covered by the outer skin, so that the covered hot air is used for promoting the rainfall of local areas. The invention also provides a method for promoting rainfall in local areas.

Description

Covering body and method for promoting rainfall in local area

Technical Field

The invention relates to a structure and a method for promoting rainfall, in particular to a covering body and a method for promoting rainfall in local areas.

Background

The prior art of a structure for storing hot air: the application of the greenhouse can transmit sunlight and can prevent the air in the greenhouse from circulating with the outside air, so that the temperature of the air in the greenhouse is higher than that of the outside air, and heat energy can be stored in the air in the greenhouse. However, the components of the greenhouse are beams and plates which are subjected to bending moment, and the weight of the greenhouse is supported by walls or columns which are subjected to pressure. In this way, the thickness of the cross section increases as the size increases, thereby greatly increasing the weight of the component itself and making it difficult to make the component in a large area and volume.

Prior art of air pressure supported structures: the outer skin of the existing inflatable building uses an airtight film, and the pressure difference between the inside and the outside is achieved by a blower (blower) and other machines. This is different from the distribution of pressure differences caused by hot air buoyancy; the pressure difference between the inner side and the outer side of the air inlet of the air conditioner is close to zero and then increases upwards, however, the pressure difference between the inner side and the outer side of the air inlet of the air conditioner does not change along with the height change. Therefore, the two have very different effects on the structure mechanics; the buoyancy of the outer skin of the lower part of the outer skin is smaller, and a gap communicating the inner side and the outer side can exist at the lowest part. However, the buoyancy applied to the outer skin of the former is not changed due to the difference in height, and the space between the outer skin and the field is closed. In addition, most of the buoyancy of the conventional structure is borne by the outer skin near the edge around the structure, so that the tension borne by the outer skin is relatively increased along with the increase of the width and height of the structure, and therefore, the length, width and height of the structure are limited by the factors, so that the structure is not easy to expand.

Many of the conventional artificial rainfall techniques are methods in which a compound capable of generating ice crystal nuclei, for example, iodonium iodide, dry ice, or the like, is thrown into a dense cloud layer that is likely to cause rainfall by an airplane or a rocket, or silver iodide is burned on the ground when a front (front) comes, and flue gas containing silver iodide fine particles is caused to enter the cloud layer with an ascending air flow. The technology can make supercooled water drops below-5 deg.C in cloud layer quickly form ice crystal and release its latent heat, so that the cloud layer can be developed to increase rainfall by about 10%. However, the existing artificial rainfall technology needs to be matched with weather conditions, and once a thick cloud layer or a frontal surface which is likely to rainfall does not come, the existing artificial rainfall technology cannot be implemented to achieve the effect of increasing rainfall. For example, areas with prolonged drought requiring rainfall are often difficult to have thick clouds or fronts, and thus, there is a difficult opportunity to express a drought image by inducing rainfall using the existing artificial rainfall techniques. The existing artificial rainfall technology cannot actively promote the formation of a thick cloud layer which has the opportunity to rain. In addition, most of the existing artificial rainfall technologies are implemented with a mesoscale cloud layer (the horizontal length is about 10 km to several hundreds km) as an implementation target to promote a large-scale rainfall increase.

Another existing artificial rainfall technology: the literature of meteorology describes that a violent fire in a forest or a house over a large area occasionally causes a rain shower. The reason is that: fires can release significant amounts of heat energy into the underlying atmosphere (loweramospheres), thereby increasing the atmospheric instability in the local area (atmospheric instability). When a large fire encounters unstable weather conditions, there is a chance that rain falls due to the occurrence of small-scale rain clouds. Meteorological experts have attempted to promote rainfall by burning large quantities of the ground to increase the thermal energy of the underlying atmosphere. However, considering the deliberate burning of a large amount, it is not only uneconomical but also likely to cause environmental pollution and disasters. Therefore, this prior art technique is not widely used.

Disclosure of Invention

The invention provides a cover body for making local area rainfall so as to promote the rainfall of local area.

The invention also provides a method for making the local area rainfall so as to promote the rainfall of the local area.

To achieve the above and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, a covering for rainfall in a local area is provided, which is used to cover a field capable of receiving heat energy, so as to form a space between the covering and the field to contain air and allow the air therein to receive heat energy, and the outer skin of the covering prevents the air therein from mixing with and convecting with the outside air, so as to reduce the temperature difference between the inside air and the outside air due to the heat energy transferred from the inside to the outside, and the outer skin of the covering is pushed up by buoyancy generated by the temperature difference between the inside air and the outside air to form a huge space to contain air and store a huge amount of heat energy in the air therein, so as to use the covered hot air to promote rainfall in the local area.

The covering body at least comprises an anti-buoyancy device and the outer skin.

The outer skin is at least made of a thin object, and the strength of the outer skin can bear expected stress caused by the buoyancy of hot air; the skin substantially blocks the passage of air from its inside or outside through to the other side. The outer skin is used for covering the field capable of receiving heat energy; the edge portion of the skin remains at or near the original height of the playing surface from the beginning of storage to the time it is filled with air, however, at the same time, the inner portion of the skin edge portion can be pushed up away from the playing surface, so that a large space can be formed between the skin and the playing surface below the skin to accommodate air; the gap between the edge of the outer skin and the ground surface below the outer skin can be used as an air inlet channel for the outside air to enter the space, so that when the inside of the outer skin is pushed to be lifted, the outside air enters the space through the air inlet channel; alternatively, the air inlet passage may be selectively provided below the lower portion or edge portion of the outer skin, as required, by providing a duct or a raised object for forming a passage for air to enter.

The anti-floating device comprises a plurality of anchors and a plurality of anti-floating pulling pieces which are dispersedly distributed below the part which can be pushed and lifted and is arranged inside the edge part of the covering body. The anchors are dispersedly installed on the ground, the upper ends of the anti-floating pulling pieces are respectively connected to the parts of the outer skin, and the lower ends are connected to the anchors. The anti-floating pull members provide a means for transferring tension between the sheath and the anchors. The tensile strength of each anti-floating pulling member can withstand the expected stress caused by the buoyancy of the hot air covered by the outer skin. The anchor is arranged on the ground below the outer skin, is an object which can be connected to bear upward pulling force, and is an object which is anchored on the ground or original ground and has enough anchoring force to bear the upward pulling force caused by the buoyancy of hot air above the object; or an object placed on the ground or on the original ground object with sufficient gravity to withstand the upward pulling force caused by the buoyancy of the hot air above the object.

The heat energy received by the air in the covering body can be any one or any number of the following: solar radiant heat, geothermal heat, heat released from the ground or water surface, or industrial waste heat, but not limited thereto. The way of receiving the heat energy can be through any one or any number of the following ways: but not limited to, transfer through the outer skin, transfer through the surface of the site, or transfer through added pipes.

The covering body can make the covered air receive heat energy and the outer skin can block the air at the inner side and the outer side from mixing and convection, so that the temperature of the air in the covering body is higher than that of the air at the outer side, and the outer skin can be pushed and lifted by utilizing the buoyancy generated by the temperature difference of the air at the two sides to increase the space for accommodating more air. The buoyancy generated to the skin of the covering body based on the temperature difference of the air is proportional to the height of the skin from the air intake passage in addition to the temperature difference. The invention can make a part of the inner part of the outer skin higher than the air inlet channel by enough height difference to form a bulge part of 'starting bulge' at the stage of starting heat accumulation, so that the covered air can start to push up the bulge part by receiving heat energy and generating buoyancy force on the bulge part by the temperature difference of the inner air and the outer air caused by the blocking heat energy of the outer skin to be transmitted outwards to be larger than the gravity of the bulge part. In order to obtain a sufficient height difference, it can be determined experimentally in the field or by calculation with reference to the following relation (1):

buoyancy is made greater than gravity:

H×ΔT×C＞ΔW/ΔA

h > Δ W/(C × Δ A × Δ T) relation (1)

Wherein H is the height difference (m) between the convex part of the outer skin and the air inlet channel; Δ W is the weight (kg) of the projected portion of the outer skin; Δ a is a projected area of the convex portion of the outer skin on a horizontal plane (m 2); delta T is the temperature difference (DEG C) of the air inside and outside the covering body; c is air temperature difference buoyancy coefficient (kg/m 3-DEG C).

The relationship between the air temperature difference buoyancy coefficient (coefficient of the buoyance to air temperature difference) C and the local atmospheric temperature and pressure can be calculated according to the bosch law as the following equation (2):

c is 0.348P/[ (273+ T) × (273+ T + Δ T) ], relational expression (2)

Wherein T is the atmospheric temperature (DEG C) near the covering body; p is the atmospheric pressure (mb) near the cover.

In order to make the outer skin form the convex part of the starting bulge, the original ground with higher convexity in the field or the original ground object with higher convexity on the field can be utilized, so that the outer skin laid on the outer skin is higher than the air inlet channel by enough height difference, and the convex part of the starting bulge is formed at the higher convexity; alternatively, the projecting portion of the "starter bulb" may be formed by additionally raising or elevating a portion of the interior of the outer skin above the air intake passage by a sufficient height difference on the ground surface.

When the covered air is heated by heat energy to make the convex part in the outer skin conform to the relation (1), namely the buoyancy of the air below the convex part is larger than the gravity of the convex part, the convex part can be pushed up, and simultaneously the external air is sucked to flow to the lower part of the convex part through the adjacent air inlet channel and then through the gap between the ground surface and the outer skin surface, and the space increased by pushing up is filled. When the outer skin is laid on the ground, a gap is formed between the outer skin and the ground due to the unevenness of the surface of the ground, the original ground object on the ground, or the uplift outer skin of the anti-floating pull piece and the reinforcing component which are originally arranged below the outer skin, and the gap can be communicated to the space below the outer skin of the bulge part from at least one air inlet channel.

After the projected part of the outer skin is pushed up, the projected part continues to receive heat energy, so that the projected part is pushed up higher and expands the range, and simultaneously, the external air is continuously sucked into the projected part until the outer skin of each part is pushed up to the height set by each anti-floating force pulling piece, so that the huge space between the outer skin and the field is filled with 'primary hot' air. After the air is filled, the heat energy is continuously received, and the temperature of the covered air is increased. When the covered air receives heat energy to be heated, the moisture on the field can absorb the heat energy to become latent heat and evaporate to become water to be stored in the covered air. The blanket of air becomes hot and humid "hot" air upon receiving thermal energy over a period of time.

After storing a large amount of 'hot' air, when the covered 'hot' air is to be released, the at least one anti-buoyancy pulling piece is released or released, so that the inner hot air pushes the outer skin, and an opening is formed at the edge of the outer skin to enable the covered 'hot' air to flow out to the lower atmosphere, so as to increase the temperature and humidity of the lower atmosphere in a local area.

In an embodiment of the present invention, the outer skin may also be formed by a thin object and a reinforcing member.

In an embodiment of the invention, at least a portion of the thin object of the outer skin has light transmittance.

In an embodiment of the present invention, the cover for promoting rainfall in local area further comprises: at least one air release opening is arranged inside the covering body outer skin, the edge part of the air release opening is continuously kept at the original height of the ground surface approximately in a similar arrangement mode of the edge part around the covering body outer skin, when the covered hot air is to be released, the anti-floating pull piece near the air release opening is loosened, the covered hot air floating force can push up the edge part of the air release opening and the outer skin near the air release opening, and the air release opening is formed to release the hot air.

In an embodiment of the present invention, the cover body for promoting rainfall in local areas further includes a plurality of reinforcing members.

In an embodiment of the invention, the thin object of the outer skin is any one or more of a plastic film or a film of a similar material (such as rubber or elastomer), or a plastic film or a film of a similar material made by adding a reinforcement such as fiber, thread, braid or a combination thereof.

Another embodiment of the present invention provides a method for promoting rainfall in local areas, comprising the following steps:

step one, covering a site capable of receiving heat energy by using at least one covering body for promoting rainfall in local areas.

And step two, laying the outer skin of the covering body on the ground surface, enabling a part of the outer skin to form a convex part of 'starting uplift', enabling the covered air to receive heat energy to enable the air on the inner side and the outer side to generate temperature difference, enabling the buoyancy of the covered hot air to the convex part to be larger than the gravity of the convex part, enabling the buoyancy of the covered air to start to push up the convex part, and simultaneously attracting the external air to enter the space filled with the air increased due to pushing up through the air inlet channel.

And step three, the covered air continuously receives heat energy, so that the convex part is continuously pushed to be higher, the pushed range is gradually expanded, meanwhile, the external air is continuously sucked into the convex part until the outer skins of all the parts are pushed to the height set by the anti-floating force pulling pieces, and the space covered by the covering body is filled with 'initially hot' air.

And step four, after the air filled with the initial heat is filled, continuously receiving the heat energy, so that the temperature of the covered air is further increased. Meanwhile, the moisture on the field also absorbs the heat energy to become latent heat and is evaporated into water vapor to be stored in the covered air. The blanket of air becomes hot and humid "hot" air upon receiving thermal energy over a period of time.

Step five, after accumulating a great amount of heat energy in the covered air, releasing the covered air to the lower atmosphere at any appropriate time, and increasing the temperature and humidity of the lower atmosphere, so that the atmosphere instability of the local area is increased, and the rainfall is promoted to develop into small-scale rain cloud.

In one embodiment of the invention, a method of forming a portion of the skin into a "starter bump" protrusion comprises: after the required height of the projecting part from the air inlet channel is calculated in advance by field experiment or by the above relation formula, whether the height of the outer skin projecting part laid on the ground is higher than the required height is detected according to the calculated required height, if so, the outer skin projecting part can be used as the projecting part of the 'starting bump'. If not, additional lifts or stacking means are provided on the site to raise or lift a portion of the interior of the outer skin above the desired height, thereby forming a "starter bump" protrusion.

In one embodiment of the invention, the method of releasing the covered hot air comprises releasing at least one anti-floating pull.

In an embodiment of the present invention, the method for promoting rainfall in local areas further includes: ice crystal nuclei or condensation nuclei, or both, are added to the hot air prior to releasing the covered hot air.

In one embodiment of the present invention, the method of adding ice crystal nuclei and/or coagulation nuclei comprises: (1) discharging the flue gas generated by burning silver iodide into the covered hot air; and/or (2) spraying saline solution into the covered hot air in the form of mist-like fine water drops.

In the invention, the cover body for promoting the rainfall in the local area covers a large area of field to accommodate a huge volume of air to receive heat energy, and the heat energy which can be utilized in the large area can be received through the five steps, so that a huge amount of heat energy is stored in the huge volume of air covered by the cover body. This large volume of high temperature and humidity air is released into the lower atmosphere to raise the temperature and humidity of the lower atmosphere. Thus increasing local atmospheric instability. Especially when the atmosphere is unstable, the air is released into the lower atmosphere, so that the atmosphere in local areas can be promoted to be more unstable, and strong convection cells can be promoted to be convected upwards, and the chance of rainfall caused by the development of small-scale rain clouds is increased. Therefore, the cover body and the method for promoting rainfall in local areas can effectively generate rainfall in local areas.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic top view of a cover for promoting rainfall in a local area according to one embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the section A-A of the cover of FIG. 1 for promoting rainfall in a localized area when applied to an uneven ground filled with air;

FIG. 3A is an enlarged partial view of the outer skin of FIG. 2 positioned on the ground at a higher elevation in the field;

FIG. 3B is an enlarged partial view of the top surface of the outer skin of FIG. 2;

FIG. 4 is an enlarged view of the section B-B of the cover for promoting rainfall in local areas of FIG. 1 applied to a part of a field with water surface and stored with air;

FIG. 5A is an enlarged partial schematic view of the edge portion of the outer skin and the surface of the field of FIG. 4 at the surface of the water;

FIG. 5B is a schematic cross-sectional view of B-B of FIG. 5A;

FIG. 5C is a schematic cross-sectional view of C-C of FIG. 5A;

FIG. 6 is a schematic top view of a cover for promoting rainfall in a local area according to another embodiment of the present invention;

FIG. 7 is an enlarged view of section E-E of FIG. 6 when the reservoir is full of air; and

FIG. 8 is a flowchart illustrating a method for promoting rainfall in a local area according to an embodiment of the present invention.

Detailed Description

In order to improve the limitation of the existing artificial rainfall technology, the invention provides a method and a structure used by the method for increasing the temperature and humidity of the lower atmosphere, namely increasing the atmospheric instability degree of local areas, so that rain clouds with small scale (the horizontal width is about 0.5-10 km) are formed in the atmospheric troposphere to cause rainfall in the local areas. This method requires covering the surface with a large volume of air, which receives the heat and blocks it from mixing with the ambient air and from convection, thereby storing the heat in the covered air. After accumulating a large amount of heat energy, the covered air is released into the lower atmosphere to increase the temperature and humidity of the lower atmosphere, thereby promoting the formation of small-scale rain clouds and causing a chance of rainfall. The structure used in the method is a covering body which can be used for covering the field to contain air, receive and store heat energy. In order to make the covering body be able to be made into larger area and height so as to accept more heat energy and store a large amount of heat energy in the air with huge volume, the invention utilizes the buoyancy generated by the temperature difference between the inside and the outside of the covering body to support the inside of the covering body to form huge space, and replaces the prior structural body with heavy components such as plates, beams, columns and the like. The invention adopts a plurality of anti-buoyancy pulling pieces distributed at each part of the covering body to locally counteract the buoyancy exceeding the gravity of each part at each part after the covering body is filled with air and heated, therefore, the covering body can be made into a larger area and a larger height, the stress borne by the outer skin of the covering body is greatly reduced, the thickness and the weight of the thin object of the outer skin can be reduced within the allowable stress range of the material, and the covering body can easily reach the protruding part which is in accordance with the relational expression (1) mentioned below to form a starting bulge to start to push the inner part of the outer skin and suck the air into the inner part at the stage of starting to receive the heat energy. The thickness of the thin object using the outer skin of the present invention is, for example, about 0.03mm to 2.0mm, but not limited thereto. The skin is pushed up and the air is sucked in as the heat energy is continuously received. When the outer skin is full of air, the air continues to receive heat energy and then is heated, so that the buoyancy of the air to the outer skin is far larger than the gravity of the outer skin. The anti-floating pulling pieces distributed on each part bear the buoyancy exceeding the gravity of the anti-floating pulling pieces on the spot, so that the stress of the outer skin is small and the outer skin can be made thin and light, the outer skin cannot be damaged due to large coverage area, and a large-volume space can be formed to contain air. After the air is fully stored, the air continues to receive heat energy, so that the large volume of air covered by the air stores a large amount of heat energy. The width of the single covering body is, for example, between about 200 m and 5 km, but not limited thereto. In the case of multiple adjacent covers, the length and width dimensions of the field should be increased, for example, from about 500 meters to about 20 kilometers or more. The height after air accumulation is between about 5 meters and 150 meters.

The covering body for promoting the rainfall of the local area is arranged on a field which can receive heat energy, and the surface of the field can be the whole ground or part of the ground and part of the water surface. The ground can be flat or not very high, and there can be no ground or not very high ground to facilitate the installation of outer skin. If there is even too high a raised ground or ground objects inside the edge of the field, it is not desirable to exceed or approach the design height of the outer skin, otherwise, it can be trimmed or removed. However, the ground under the edge portion of the skin may be selected to be relatively flat and not too tall. If the ground is too rough or the ground is too high, the ground can be avoided, trimmed or removed.

Fig. 1 is a schematic top view of a cover for promoting rainfall in local areas according to an embodiment of the present invention. FIG. 2 is an enlarged view of the A-A section of the cover of FIG. 1 for promoting rainfall in a local area when the cover is applied to an uneven ground and filled with air. FIG. 3A is an enlarged partial view of the edge portion of the cover of FIG. 2 positioned above the surface of the field ground. Fig. 3B is a partially enlarged view of the top surface of the outer skin of fig. 2. Referring to fig. 1 and 2, a cover 10 for promoting rainfall in local areas according to an embodiment of the present invention can be used to cover a surface of a site capable of receiving heat energy: comprises a ground G and a water surface W. The field surface may also include the ground G, but not the water surface W. The cover 10 includes an outer skin 81 and an anti-floating device 11. The edge 15 of the outer skin 81 is maintained at or near the original height of the ground surface (ground G and water W), and the top 111, slope-changing portion 211 and side 311 of the outer skin 81 are lifted from the ground surface (ground G and water W) to form a space 5 between the outer skin 81 and the ground surface (ground G and water W) for accommodating air. If a gap is formed between the edge 15 of the outer skin 81 and the ground surface due to uneven ground G or low ground objects on the ground, the gap can be used as the air intake duct 4. However, if the ground G on which the edge portion 15 of a part is located is too higher than the ground G on which the edge portion 15 of the other part is located, an air intake passage is not provided there, and the gap between the edge portion 15 and the ground G is closed with the closure 14 to increase airtightness. For example, soil or other object is pressed against the edge portion 15 of the skin 81 to create a sealing effect, as shown in fig. 3A. When the water surface W is below the edge portion 15, the edge portion 15 is immersed in the water, and thus there is no gap as an intake passage. Therefore, as long as there is an intake passage 4 at the ground surface G sufficient, there may be no intake passage at the water surface W. If it is necessary to provide an intake passage at the water surface W, a hollow duct (described below with reference to fig. 5B) or a block (described below with reference to fig. 5C) or the like is added so as to form a passage that communicates the space on both the inner and outer sides in place of the intake passage 4. The anti-buoyancy tool 11 includes a plurality of anchors 12 and a plurality of

anti-buoyancy pulling members

13a, 13b, and 13c distributed in a dispersed manner, and has upper ends connected to respective portions of the outer skin 81 and lower ends connected to the anchors 12 provided at the site. The air in the space 5 is heated higher than the outside by receiving the heat energy to generate buoyancy to the outer skin, and the buoyancy is enough to push up the top 111, the slope transition portion 211 and the side portion 311 of the outer skin by a sufficient height difference, so that the space 5 is enlarged and the outside air is sucked to fill the space enlarged by pushing up the outer skin. As the heat continues to be received, the outer skin continues to be pushed up to the predetermined height of each anti-floating pulling member and pulled, so that the space formed between the covering body 10 and the ground surface (ground G and water W) is filled with air. The heat energy continues to be received to re-heat the large volume of air contained, thereby storing a greater amount of heat energy in the covered air.

As shown in fig. 2, the strength of the outer skin 81 of the covering body 10 can withstand the expected stress due to the buoyancy of the covered hot air. In addition, the thin object 82 forming the outer skin 81 can block the air in the space 5 from passing through the outer skin 81 to circulate with the outside air, and at least a part of the thin object 82 has light transmittance, so that the sunlight can be emitted into the outer skin 81 from the outside to heat the air in the outer skin 81. The thin object 82 may be a plastic film having the above-described function, or a film of another material having the above-described function. For example, it may be a film of Polyethylene (PE), Ethylene vinyl acetate Copolymer (EVA), Polyvinyl Chloride (PVC), Polypropylene (PP), Polyethylene terephthalate (PET) or other material with similar properties, such as a rubber film or an elastomer film, or a combination of any of these films. In addition, fibers, threads, braids or combinations thereof may be added to the plastic film or films having similar properties to enhance the structural strength.

After the cover 10 is filled with air, the cover continues to receive heat energy to further raise the temperature of the air therein, so that the buoyancy of the air exceeds the weight of the outer skin 81, and the portions exceeding the weight of the outer skin 81 are received by the

anti-floating tension members

13a, 13b, 13c of the respective portions and are transmitted to the anchor 12 to be offset. The anchor 12 is secured or placed at a site where it can be secured or placed. Each anchor 12 is an article to which a single or multiple anti-floating tension members can be attached and which is sufficient to withstand the tension thereof. Examples of the former are piles, plants, structures, or any other objects fixed to the ground G or the water bottom as the anchors 12. Examples of the latter are a block of sufficient weight, such as concrete, stone, metal or wood, placed on the ground G or in water, or a combination, such as a combination of a container (such as a bag, basket or bucket) filled with a heavy object (such as soil, etc.), as the anchor 12. In the embodiment of fig. 2, the anchors 12 are piles fixed to the ground G and the water bottom, and each anchor 12 may be connected to one or more

anti-buoyancy pulling members

13a, 13b, 13c to bear a portion which continues to increase in temperature after being filled with air so that the buoyancy of the air exceeds the weight of the outer skin 81.

The

anti-floating tension members

13a, 13b, 13c of the covering body 10 are members for providing transmission of tension between the sheath 81 and the anchor 12, and have a strength to withstand the expected tension due to the buoyancy of the covered hot air. The

anti-floating pulling members

13a, 13b, 13c are made of a member capable of transmitting a pulling force, and the material thereof may be made of artificial material, natural material or a combination thereof. In the embodiment of fig. 2, each anti-float pull 13a connects the top 111, each anti-float pull 13b connects the slope transition 211, and each anti-float pull 13c connects the sides 311. Anti-buoyancy pull 13a is connected to anchor 12 in a generally vertical orientation downward so that anchor 12 can counteract the buoyancy force experienced by top surface 111. The anti-floating pull 13b is connected to the anchor 12 with an inward downward inclination, so that the anchor 12 offsets the horizontal and vertical components of the slope transition part 211 derived from the buoyancy, and further prevents the horizontal and vertical components of the slope transition part 211 derived from the buoyancy from being transferred and accumulated to the side part 311 and the edge part 15 to cause damage. The anti-floating pull 13c is connected to the anchor 12 in an inward and downward slant manner, so that the anchor 12 can counteract the horizontal and vertical force components derived from the buoyancy of the side 311, thereby further reducing the stress on the sheath 81.

The cover 10 for promoting rainfall in local area may further include a plurality of reinforcing members 285 disposed in the outer skin 81 and connected to the side portions 311 from the top portion 111 and the slope transition portion 211, respectively, as shown in fig. 2. The lateral portion 311 reduces the tension of the skin 81 with the horizontal component of its pulling force and assists the lateral portion 311 in being pulled off the field with the vertical component of its pulling force. And the reinforcing member 285 may be made of a man-made material, a natural material, or a combination thereof.

The outer skin 81 of the cover 10 for promoting rainfall in local areas may further comprise a plurality of reinforcing

members

85, 185 as shown in fig. 2 and 3B. The reinforcing member 85 is disposed inside the thin object 82 of the outer skin 81, and the reinforcing member 185 is disposed on the outer surface of the thin object 82 of the outer skin 81 to increase the tension that the outer skin 81 can bear. And the reinforcing

members

85, 185 may be made of artificial materials, natural materials, or a combination thereof.

In order to allow the interior of the covering 10, which promotes rainfall in localized areas, to be pushed up by the air and to suck in the air, it is necessary to estimate beforehand the required height of the projections forming the "start-up hump" as measured from the air intake channel. The calculation can be performed by a field experiment or by calculation with reference to the following relational expression (1).

Buoyancy is made greater than gravity:

H×ΔT×C＞ΔW/ΔA

h > Δ W/(C × Δ A × Δ T) relation (1)

Wherein H is a height difference (m) between the convex portion of the outer skin 81 and the air intake passage; Δ W is the weight (kg) of the projected portion of the outer skin 81; Δ a is a projected area of the convex portion of the outer skin 81 on a horizontal plane (m 2); delta T is the temperature difference (DEG C) of the air inside and outside the covering body; c is air temperature difference buoyancy coefficient (kg/m 3-DEG C).

The relationship between the air temperature difference buoyancy coefficient C and the local current atmospheric temperature and atmospheric pressure can be calculated according to Boyle's Law as the following relation (2):

c is 0.348P/[ (273+ T) × (273+ T + Δ T) ], relational expression (2)

Wherein T is an atmospheric temperature (deg.c) in the vicinity of the cover 10; p is the atmospheric pressure (mb) in the vicinity of the cover 10.

After obtaining the required height measured from the air intake passage, it is checked whether the height of the projected portion of the outer skin 81 on the original ground G of the higher convexity in the field or the original ground object of the higher convexity on the field is higher than the required height. If so, the higher convex original ground G or the convex portion of the outer skin above the original ground can be used as the convex portion of the "starter bump". If not, a support 31, such as a frame or other similar support or stacking means, may be added to the ground surface G to support a portion of the outer skin 81 above a desired height. In the embodiment of fig. 2, a frame is used as the spacer 31 to raise a portion of the interior 111, 211 of the outer skin 81 above a desired height, thereby forming a "starter bump" bulge.

As shown in fig. 4 and 5A, when the edge portion 15 is at the water surface W, since the outer skin 81 of the edge portion 15 and the vicinity thereof is immersed in the water, no gap is formed between the outer skin 81 of the edge portion 15 and the vicinity thereof and the water surface W at this position, and the air intake passage can be formed. If necessary, when an air intake passage is provided in the edge portion 15 of the water surface W, a duct or a block for introducing air may be additionally provided in a lower portion of the outer skin 81 or below the edge portion 15 as an air intake passage. As shown in fig. 5B, the additional hollow duct 42 of any length extends from above the ground water surface W outside the cover 10 to below the edge portion 15 and the outer skin 81 in the vicinity thereof to above the ground surface G inside thereof, and the hollow portion of the hollow duct 42 serves as an air intake passage. In addition, it is also possible to add an elevating object, such as an elevating object (not shown) whose lower part is placed on the ground and whose upper part is exposed to the water surface, or a floating elevating object 33 (see fig. 5C), etc., and to place the elevating object under the edge part 15 and the outer skin 81 in the vicinity thereof, from the outside of the edge part 15 to the inner water shore, so that a gap through which air can enter the inner space from the outer space thereof is formed between the field water surface W and the edge part 15 and the outer skin 81, and the gap can be used as an air intake passage.

When waste industrial heat or geothermal heat is available in the vicinity of the site, the cover 10 for promoting rainfall in a local area may be additionally provided with a pipe (not shown) for transferring heat energy so that the heat energy such as waste industrial heat or geothermal heat is transferred from the vicinity of the site into the space inside the outer skin 81 through the lower side of the edge portion 15 of the outer skin 81.

In addition, as shown in fig. 4, at least a part of the area of the water surface W where no other member is disposed or an object is placed under the cover 10 may be additionally provided with an object 22 that can float on the water surface and reduce the transmission of sunlight, such as floatable wood or plants or plastic or other objects having air bubbles, to reduce the transmission of solar radiation heat into the water.

When the present embodiment causes the local rainfall covering 10 to accumulate a large amount of heat energy in the air covered thereby, the at least one

anti-floating pulling member

13b, 13c adjacent to the edge portion 15 is released, so that the covered hot air pushes up the outer skin (such as the slope transition portion 211 and the side portion 311) of the local rainfall covering, and drives the adjacent edge portion 15 to be pushed up away from the ground surface (such as the ground G, the water W), thereby forming an opening through which the covered hot air is released into the lower atmosphere. The

anti-floating tension members

13a, 13b, 13c may be provided with various fasteners, loops or hooks for connecting with the anchor 12, so that the

anti-floating tension members

13a, 13b, 13c can be easily detached from the anchor 12. Further, remote release means may be provided between the

anti-float pull

13a, 13b, 13c and the anchor 12 to allow simultaneous disengagement of the

anti-float pull

13a, 13b, 13c from the connected anchor 12.

Referring to fig. 6 and 7, fig. 6 is a schematic top view illustrating a cover for promoting rainfall in local areas according to another embodiment of the present invention. FIG. 7 is an enlarged cross-sectional view of E-E of FIG. 6. Another embodiment of the present invention discloses a cover 10 for promoting rainfall in local areas, which further comprises: at least one relief opening 30 may be provided inside the outer skin 81 of the covering body 10, the edge portion 15 of the relief opening 30 and the

anti-floating pulling pieces

13b, 13c in the vicinity thereof being arranged in a manner similar to the edge portion 15 and the

anti-floating pulling pieces

13b, 13c around the outer skin 81 of the covering body 10 described above; the original height of the ground surface (e.g., ground G, water W) is maintained continuously during the storage of the hot air. When the covered hot air is to be released, the at least one

anti-floating pulling member

13b, 13c near the edge 15 of the air release opening 30 is released, so that the covered hot air is lifted by buoyancy of the outer skin (such as the slope transition portion 211 and the side portion 311) near the edge 15 of the air release opening 30, and the edge 15 near the covered hot air is also lifted away from the ground surface (such as the ground G and the water surface W) to form the air release opening 30, thereby releasing the covered hot air into the lower atmosphere through the air release opening 30. In the embodiment of fig. 6, the configuration and composition of the components are the same as those in the embodiment of fig. 1 except for the configuration of the vent 30.

Referring to fig. 8, fig. 8 is a flowchart illustrating a method for promoting rainfall in a local area according to an embodiment of the present invention. The invention discloses a method for promoting rainfall in local areas, which comprises the following steps.

Step 801, cover a site capable of receiving heat energy by using one or a plurality of adjacent covering bodies for promoting rainfall in local areas.

Step 802, the covering body skin is laid on the ground surface, and a part of the covering body skin forms a convex part of 'start-up bump', and the air covered by the covering body skin receives heat energy to generate temperature difference between the air inside the covering body skin and the air outside the covering body skin, so that the buoyancy force applied to the convex part is larger than the gravity of the convex part, and the covered air buoyancy force starts to push up the convex part, and simultaneously, the outside air is sucked into the space increased by being pushed up through the air inlet channel.

In step 803, the covered air is heated continuously, so that the protruding portion is pushed higher and the pushed range is gradually enlarged, and at the same time, the external air is sucked into the protruding portion until the outer skin of each portion is pushed to the height set by each anti-floating force pulling member, so that the huge space between the covering body and the field is filled with "primary hot" air.

Step 804, after the covering body is filled with the 'initially hot' air, the covering body continues to receive heat energy, so that the temperature of the covered air is further increased. Meanwhile, the moisture on the field also absorbs heat energy to become latent heat and evaporates to become moisture which is stored in the covered air. The covered air becomes hot and humid air by receiving heat energy for a period of time.

Step 805, after accumulating a large amount of heat energy in the blanketed air, is to release the blanketed air to the underlying atmosphere at any suitable time. If several adjacent covering bodies are used, the release into the lower atmosphere can be performed at approximately the same time to raise the temperature and humidity of the lower atmosphere. Thereby increasing atmospheric instability in the local area and promoting the development of small scale rain clouds.

The method for promoting rainfall in local area of the invention utilizes at least one covering body for promoting rainfall in local area to cover on the large area of field, and can receive usable heat energy in large area through the above five steps, and store a large amount of heat energy in the covered huge volume of air. Releasing this large volume of high temperature and humidity air into the underlying atmosphere can increase the temperature and humidity of the underlying atmosphere, thus increasing local atmospheric instability. Particularly when the atmosphere is unstable, the rain cloud accumulation of small scale can be promoted, so that the local area can be lowered to gust rain.

If the covered site (e.g., ground G) is out of moisture, it may be possible to leave the site moist in any manner, such as: the water is filled, watered, sprayed with water mist and the like, so that the water on the field absorbs heat energy to become latent heat and is evaporated to become water vapor which is stored in the covered air.

In step 802, a desired height of a protrusion from an air intake passage is determined in advance in order to form a protrusion of a "start-up bump" inside the outer skin of a cover for promoting rainfall in a local area. The desired height can be determined by field experiments or by relational calculations. The former is: after the covered air is heated and heated, a part of the inner part (such as the top part and the inclination transition part) of the outer skin is gradually raised and lifted from low to bulge by a machine tool (such as a lifter) or a lifting object (such as a framework), and the raised height is the required height when the outer skin is raised to the height when the outer skin is floated by the hot air. The latter is: data such as the weight per unit area of the members such as the outer skin, the atmospheric temperature and pressure in the vicinity of the site, and the temperature difference between the air on the inner and outer sides of the outer skin after receiving the thermal energy are actually measured by relational expressions such as the above relational expressions (1) and (2), and the height difference calculated by substituting the data into the above relational expressions (2) and (1) is the required height from the intake passage. After the required height is obtained according to any method, whether the height of the outer skin protruding part on the original ground with higher convexity laid on the field or the original ground with higher convexity laid on the field is higher than the required height or not is detected. If so, the projecting portion of the skin can be used as the projecting portion of the "starter bump". If the required height is not reached, a lifting object or a lifting machine is additionally arranged on the field, a part of the outer skin is lifted or pushed to be higher than the required height, and a protruding part of the 'starting bump' is formed.

In step 805, the method of releasing the covered heated air includes releasing at least one anti-floating pull in the covering that promotes rainfall in the local area, causing the covered heated air to push up the outer skin (e.g., slope transition and sides) of the portion and cause the edge portions adjacent thereto to also be pushed up away from the surface of the field to form the opening. Taking fig. 2 as an example, the left edge 15 is pushed up away from the ground G thus forming an opening through which the hot air flow inside it is released to the left into the lower atmosphere. Taking fig. 7 as an example, the

anti-floating pulling pieces

13b and 13c near the edge 15 of the air release opening 30 are released, so that the covered hot air is made to float to push up the outer skin (such as the slope transition part 211 and the side part 311) of the part and bring the edge 15 near the part to be pushed up to leave the ground G to form the air release opening 30, and the hot air can be released into the lower atmosphere more intensively through the air release opening 30. In addition, a clip chain (not shown) may be installed on the top 111 or the slope transition part 211 of the outer skin, and when the air in the clip chain is to be released, the

anti-floating pulling pieces

13a and 13b near the clip chain are released, so that the outer skin of the part is further lifted, the tension applied to the part is increased, and the clip chain cannot bear excessive tension to open and release the hot air in the part. As for the timing of releasing the covered hot air: the air can be released into the lower atmosphere after accumulating and storing huge amount of high heat energy air, so that the atmospheric instability of local areas can be increased, and the chance of rainfall increase is promoted. However, it is preferable to release the active agent when the atmosphere is unstable, for example, between 12 am and 2 hours before sunset, when the temperature and humidity of the atmosphere are increased by solar radiation, i.e., when the atmosphere is unstable. Alternatively, the timing of releasing the covered air may be determined as appropriate when the weather stability reported from the meteorological institution is low.

Ice crystal nuclei and/or condensation nuclei may be added to the covered hot air prior to releasing the covered hot air at step 805. The method comprises the following steps: (1) burning silver iodide, adding the smoke into the covered hot air, and suspending silver iodide particles in the smoke as ice crystal nuclei in the hot air, or/and (2) spraying a salt solution into mist-like fine water droplets in the covered hot air, and suspending residual salt particles after the salt-containing water droplets are rapidly evaporated in the hot air as condensation nuclei in the hot air. The ice crystal nuclei and/or condensation nuclei are released into the lower atmosphere with the hot air. The water vapor in the convection cells can be more easily formed into clouds and release latent heat, thereby further promoting the rising and development of the convection cells. In the prior art, silver iodide is combusted on the ground and is difficult to accurately apply to the ascending air flow at the front, however, the invention can accurately apply silver iodide flue gas and the like to released hot air to ascend along with the ascending air flow.

By combining the above embodiments, the covering body and method for promoting rainfall in local areas of the invention have the following characteristics:

1. the covering body of the invention receives renewable heat energy to heat the covered air, and then the buoyancy caused by the temperature difference between the inside and the outside is utilized to push the covering body, so that heavy structural materials such as plates, beams, columns and the like are not required to be supported on the structural body, and a large space can be formed. Therefore, a plurality of anti-floating pulling pieces are used at each part of the covering body, so that most of the buoyancy borne by the outer skin of each part is directly borne and transmitted to the anchor on the ground below the part for offset. The buoyancy force can not be accumulated from the top center of the outer skin to the edge. Therefore, the covering body can be made into a large area and a large volume according to the length and the width of the field, and the renewable heat energy of the large area is accepted and stored in the air of the large volume.

2. The huge amount of heat and humid air stored in the covering body is released to the lower atmosphere, so as to increase the temperature and humidity of the lower atmosphere in local areas, i.e. increase the instability of the lower atmosphere and increase the chance of raining. The rain can be promoted without waiting for a thick cloud layer with rain signs or a frontal surface to come. Even in sunny days, the rain can be promoted only by the renewable heat energy, and the effect of expressing and relieving the drought is achieved. Moreover, the invention utilizes renewable heat energy to promote rain, and can avoid environmental pollution and disasters.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for promoting rainfall in a localized area, comprising:

covering a site capable of receiving heat energy with at least one covering body for promoting rainfall in local areas;

laying the outer skin of the covering body on the ground surface, forming a part of the outer skin into a convex part of 'starting bulge', and enabling the covered air to receive heat energy to enable the air on the inner side and the outer side of the outer skin to generate temperature difference, so that the air covered by the starting buoyancy pushes up the convex part, and simultaneously, the external air is sucked into and filled in the space increased by pushing up through an air inlet channel;

the covered air continuously receives heat energy, so that the outer skin is continuously pushed up and the outside air is sucked into the inner part and is pushed up to the height set by each anti-floating force pulling piece, and the air is filled with 'primary hot' air;

the covered air is enabled to continuously receive heat energy, the temperature of the covered air is enabled to be higher, the moisture on the site also receives the heat energy to become latent heat and is evaporated into water vapor to be stored in the covered air, and therefore more heat energy is accumulated in the covered air; and

releasing the covered air into the lower atmosphere, increasing the temperature and humidity of the lower atmosphere, increasing the atmospheric instability in local areas, promoting the development of small-scale rain clouds and rainfall,

wherein the covering body is used for covering the field which can receive heat energy, a huge space is formed between the covering body and the field to contain a large amount of air, the air in the covering body receives heat energy, the mixing and convection of the air in the covering body and the outside air are blocked by the outer skin of the covering body, the heat energy is reduced to be transmitted outwards, the temperature difference of the inside air and the outside air is caused, the outer skin of the covering body is pushed to form the huge space to contain the air and store a large amount of heat energy in the air in the covering body by utilizing the buoyancy generated by the temperature difference of the inside air and the outside air, the covered hot air is used for promoting the rainfall of local areas, the covering body at least comprises the outer skin and the anti-buoyancy device,

the outer skin is at least made of thin objects, the strength of the outer skin can bear the expected stress caused by the buoyancy of hot air, the outer skin can approximately block the air from passing through from the inner side or the outer side to the other side, the outer skin is used for covering the field capable of receiving the heat energy, the edge part of the outer skin is approximately kept at or close to the original height of the field surface from the period from the beginning of air storage to the period of air filling, in the same time, the part inside the edge part of the outer skin can be pushed and lifted away from the field surface, so that a large space can be formed between the outer skin and the field surface below the outer skin to contain the air, wherein the gap between the edge part of the outer skin and the field surface below the outer skin is more suitable for being used as an air inlet channel for the external air to enter the space;

the anti-floating force device comprises a plurality of anchors and a plurality of anti-floating force pulling pieces, wherein the anchors are dispersedly arranged on the site, the upper ends of the anti-floating force pulling pieces are respectively connected with all parts of the outer skin, the lower ends of the anti-floating force pulling pieces are connected with the anchors, each anti-floating force pulling piece is a component for providing transmission pulling force between the connected anchor and the outer skin, the tensile strength of the anti-floating force pulling pieces is suitable for bearing expected stress caused by the buoyancy of hot air covered by the outer skin, the anchors are arranged on the site below the outer skin, are objects for connecting to bear upward pulling force, and are anchored or placed on the site or ground, and the anchoring force or the self weight of the anchors are enough to bear the upward object caused by the buoyancy of the hot air above the anchors;

the covering body is suitable for utilizing original ground or original ground objects with higher bulges in the field to enable the outer skin laid on the covering body to be higher than the air inlet channel by enough height difference, and a convex part of 'starting bulge' is formed at the higher bulges, so that the buoyancy force generated by the temperature difference of the inner air and the outer air caused by the receiving of heat energy and the transmission of the heat energy blocked by the outer skin to the convex part can be larger than the gravity of the convex part, the convex part can be started to be pushed up, the external air is sucked into the convex part, the covered air is further enabled to receive the heat energy, the convex part can be further pushed up higher and the range is further expanded, the external air is further sucked into the convex part, the huge space of the covering body is filled with 'initial hot' air, and then the heat energy is further received, so that the temperature of the covered air is further increased, therefore, more heat energy can be stored in the covered huge volume of air, when the heat energy is received, the moisture on the field can absorb the heat energy to become latent heat and evaporate into water to be stored in the covered air, so that the covered air becomes hot and humid air, after the huge amount of hot and humid air is stored, when the covered air is to be released, at least one anti-floating pull piece is loosened, the inner hot air pushes the outer skin, an opening is formed at the edge of the outer skin, so that the covered hot and humid air flows out to the lower atmosphere, the temperature and the humidity of the lower atmosphere of the local area are increased, the instability of the atmosphere of the local area is increased, and the rainfall of the local area is promoted.

2. The method of inducing rainfall localized areas of claim 1 wherein the step of forming a portion of the outer skin as a "starter bulb" protrusion comprises elevating a portion of the interior of the outer skin of the covering to a height such that the buoyancy of the protrusion created by the difference in temperature of the interior and exterior air resulting from the receipt of thermal energy and the transmission of thermal energy by the outer skin to the exterior is greater than the weight of the protrusion.

3. The method of inducing rainfall in localized areas of claim 1 wherein the means for releasing the blanket of heated air comprises releasing at least one of the anti-buoyant tension members.

4. The method of claim 1, further comprising adding ice crystal nuclei and/or condensation nuclei to the heated air prior to releasing the covered heated air.

5. The method of inducing rainfall in localized areas of claim 1 wherein at least a portion of the thin section of the outer skin is light transmissive.

6. The method of inducing rainfall in localized areas of claim 1 wherein said outer skin is comprised of thin objects and reinforcing members.

7. The method of inducing rainfall localized to the area of claim 1 wherein said cover means for inducing rainfall localized to further comprise a plurality of stiffening members.

8. The method of inducing rainfall localized in claim 1 wherein said cover further comprises a riser disposed on the site to raise a portion of the interior of said outer skin above said air intake passage by a sufficient height differential to form a "start-up bump" bulge, whereby the buoyancy of the bulge created by the difference in temperature of the air inside and outside by the receipt of heat energy and the transmission of heat energy outwardly by the barrier of the outer skin can be greater than the weight of the bulge to initiate the lift of the bulge.

9. The method of claim 1, wherein at least one air release opening is formed in the skin, such that when the covering is about to release the covered hot air, the at least one anti-buoyant pull member is released from the vicinity of the air release opening, such that the buoyancy of the covered hot air pushes up the edge of the air release opening and the skin in the vicinity thereof, thereby forming the air release opening to release the air.