JP2003202191A - Air cooling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cooling method satisfactory in thermal efficiency, low in liquid gas ratio, low in pressure drop and capable of saving space and energy. <P>SOLUTION: In this air cooling method, air to be cooled is introduced to a front surface opening part of an oblique honeycomb of a cooling unit with using an oblique honeycomb having openings on both of front and rear surfaces and both of upper and lower surfaces and arranged to have air to be cooled introduced from the front surface opening part and cooled air discharged from the rear surface opening part, a cooling water supply means supplying cooling water to the upper surface opening part of the oblique honeycomb, a cooling unit including a water receiving part receiving discharged water discharged from the lower surface opening part of the oblique honeycomb. At least one cooling unit is used and height of one oblique honeycomb in the cooling unit is 200-800 mm. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cooling method for efficiently cooling high temperature air such as in summer. More specifically, it relates to an air cooling method for air in office buildings, hospitals, and production plants.

[0002]

2. Description of the Related Art At present, energy used for air conditioning in office buildings and factories accounts for more than 30% of Japan's energy consumption, and reduction thereof is an urgent task. Conventionally,
Circulating air and intake air in office buildings and factories have been cooled by sending air to a fin-coil heat exchanger in which a refrigerant or cooling water has flowed and passing through the fin-coil. However, in the fin-coil heat exchanger, a large amount of cooling water is required for the amount of air to be cooled, that is, since the liquid-gas ratio is large, a large amount of electric power is required to operate the cooling water circulation pump and the like. It is necessary, the pressure loss is large, and further, when the water droplets adhere to the fin coil, the water droplets greatly impede the heat conduction and the thermal efficiency is significantly reduced. As a method of removing the adhered water droplets, a method of blowing off with a blower or the like can be considered, but it is not preferable from the viewpoint of space efficiency and power saving because it requires an extra installation space for the blower and the like and electric power.

[0003]

Therefore, there has been proposed a method of directly contacting water and air by using an oblique honeycomb without using the fin coil. For example, JP 20
Japanese Patent Laid-Open No. 00-317248 discloses a method for removing NOx and the like in air by connecting a series of wet-wall towers in which water flows along solids and allowing air to pass through the wet-wall towers. Has been done. However, even if this method is used as a method for cooling air, water that has once flowed down the wetted wall tower is allowed to flow back again in the next wetted wall tower, so there is a problem that the air cannot be sufficiently cooled. there were.
In addition, since a pump for supplying water to each tower is required, there is a problem that the installation cost and operating cost of the pump increase.

Further, as another method of directly contacting water and air by using a diagonal honeycomb without using a fin coil, a normal polyvinyl chloride diagonal honeycomb is used in a cooling tower to heat hot water or hot water. A method of cooling with is also known. However, in this method, since the material of the oblique honeycomb is ordinary polyvinyl chloride, warm water or the like is repelled from the surface of the oblique honeycomb and drops in the form of water drops. In other words, hot water does not uniformly wet the surface of the oblique honeycomb, and the large surface area of the oblique honeycomb cannot be fully utilized, so the thermal efficiency is lower than that of the fin-coil cooler, and the thermal efficiency is lower. It could not be used as a good air cooler.

Therefore, an object of the present invention is to be heat efficient
An object of the present invention is to provide an air cooling method that has a small liquid-gas ratio, a small pressure loss, space and energy savings, and is low cost.

[0006]

Under the above circumstances, as a result of intensive studies by the present inventor, at least one cooling unit having a diagonal honeycomb, a cooling water supply device, and a water receiving portion is used, and the cooling unit is used. If the height of each oblique honeycomb in the middle is within a specific range, it is possible to provide an air cooling method that has high thermal efficiency, a small liquid-gas ratio, a small pressure loss, and is space-saving and energy-saving. Heading out, the present invention has been completed.

That is, according to the present invention, the oblique honeycomb is arranged so that both front and rear surfaces and upper and lower surfaces are opened, and the air to be cooled is introduced from the front opening and the cooling air is discharged from the rear opening. Using a cooling unit having cooling water supply means for supplying cooling water to the upper opening of the oblique honeycomb, and a water receiving part for receiving discharged water discharged from the lower opening of the oblique honeycomb, An air cooling method for introducing cooled air into a front opening of the oblique honeycomb and discharging cooling air from a rear opening of the oblique honeycomb, using at least one cooling unit,
The height of each of the oblique honeycombs in the cooling unit is 200 to 800 mm, and the air cooling method is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION First, an air cooling device used in an air cooling method according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic view showing a part of the air cooling device used in this example by cutting out. Figure 1
Inside, 1 is an air cooling device, 2 is a water dispersion device (cooling water supply means), 3 is a diagonal honeycomb, 4 is a water receiving pan (water receiving part), 5
Is a cooling unit. The air cooling device 1 of the present example includes a water dispersion device 2, a diagonal honeycomb 3, and a cooling unit 5 having a water receiving pan 4 and a blower unit (not shown).

The oblique honeycomb 3 used in the cooling unit 5 is formed by laminating a plurality of corrugated sheets 21 and 22 (hereinafter, also referred to as "corrugated sheets") having a corrugated shape that propagates in one direction. The corrugated sheets 21 and 22 to be laminated are laminated so that the wave propagation directions of the corrugated sheets 21 and 22 intersect diagonally every other sheet, and the wave propagation directions of every two layers are substantially the same. The honeycomb-shaped bodies are arranged in the same direction.

The oblique honeycomb 3 has four surfaces 101 to 10 which are perpendicular to the surfaces parallel to the corrugated sheets 21 and 22.
4 is cut to form a rectangular parallelepiped, and the cut surface is neither parallel nor perpendicular to the wave propagation direction of the corrugated sheet, the rectangular parallelepiped is one of the cut surfaces.
4 as the lower surface, and the outermost layer 10 of the corrugated sheet
When 5 and 106 are placed on the left and right sides, respectively, the front and rear double-sided surfaces 102 and 103 and the upper and lower double-sided surfaces 101 and 1 are cut surfaces.
Honeycomb cells are open on all four surfaces of 04, and the left and right surfaces 10
Reference numerals 5 and 106 have a structure closed by a corrugated sheet. That is, the oblique honeycomb 3 has front and rear surfaces 102,
It has a structure in which 103 and both upper and lower surfaces 101 and 104 are open. Further, for example, front and rear surfaces 102 and 103 of the cut surface are formed with alternate cells extending diagonally upward and cells extending diagonally downward. The oblique angle (reference numeral X in the drawing) with respect to the inflow and outflow directions (horizontal direction) of the air when viewed from both front and rear surfaces of the cells extending in the oblique direction is usually 15 to 45 degrees, preferably 25 to
Within 35 degrees. It is preferable that the above-mentioned oblique angle is within this range, because the flow-down velocity is in the appropriate range and the contact efficiency is improved.

In the oblique honeycomb 3, the angle (reference numeral Y in the figure) at which the wave propagation directions of every other layers of the stacked corrugated sheets intersect with each other is usually 30 to 90 degrees,
It is preferably 50 to 70 degrees. In this way, when the corrugated sheets are laminated so as to intersect within the above angle range,
When the oblique angle (X) is 15 to 45 degrees as described above, the area where the air to be cooled and the water substantially come into contact with the honeycomb cells becomes large, so that the contact between the air to be cooled and the water, That is, the cooling efficiency of the air to be cooled is increased, which is preferable. That is, as described below, in the present invention, the air to be cooled is introduced from the front opening 103 of the oblique honeycomb 3, and the water is supplied from the upper opening 101 by the cooling water supply means 2, for example, the water supply duct 23. Since it permeates the corrugated sheet of the oblique honeycomb and slowly flows down the very surface of the corrugated sheet, an appropriate angle is formed between the ventilation direction of the cooled air and the water flowing direction of the permeation wall surface. Holds and improves contact efficiency.

The height of the cells of the oblique honeycomb used in the present invention, that is, the height of the peaks of the cells showing the dimensions of the peaks and valleys of the corrugation is usually 2.5 to 8.0 mm, preferably 3 to 5 mm.
Is. If the peak height of the cell is less than 2.5 mm, it is difficult to manufacture and the pressure loss becomes large, which is not preferable.
If the height of the cell is more than 8.0 mm, the cooling efficiency is lowered, which is not preferable.

The width of the cells in the state of the corrugated sheet of the oblique honeycomb, that is, the cell pitch is usually 6 to.
It is 16 mm, preferably 7 to 10 mm. The dimension between the front opening and the rear opening of the oblique honeycomb, that is, the thickness (t) of the oblique honeycomb is usually 100 to 100.
It is 0 mm, preferably 200 to 800 mm. The thickness is 1
When the thickness is less than 00 mm, the cooling efficiency is lowered, which is not preferable, and when the thickness exceeds 1000 mm, the cooling efficiency is not further improved and the pressure loss becomes large, which is not preferable.
In the present invention, the thickness of the oblique honeycomb may be such that the total thickness is within the above range when a plurality of oblique honeycombs are used. For example, the thickness is 300mm
In the case of using the oblique honeycomb of No. 3, three oblique honeycombs each having a thickness of 100 mm are stacked in the thickness direction so that the total thickness is 300.
It may be mm. When the oblique honeycomb is used as the cooling means, the heat exchange rate per volume is higher than that of the conventionally used fin coil, so that the thickness of the oblique honeycomb can be reduced and the installation space of the apparatus can be reduced. can do. Further, the amount of water circulation is much smaller than that of the conventional fin coil, and a great energy saving can be achieved.

The sheet-like member forming the oblique honeycomb is
It is preferable that the surface has irregularities and the inside is porous, because the surface area of the element can be made large and the contact area between water and air that permeates the element and flows down is increased. As such a sheet-like member, for example, 1 selected from the group consisting of alumina, silica and titania
Alternatively, a material composed of two or more fillers or binders and a fiber base material such as glass fiber, ceramic fiber or alumina fiber may be used. Of these, those containing titania are preferable because the efficiency of removing acidic chemical contaminants is improved. In addition, the sheet-like member usually contains 60 to 60% of a filler or a binder.
93% by weight, containing 7 to 40% by weight of fiber base material, preferably 70 to 88% by weight of filler or binder, 1% of fiber base material
2 to 30% by weight is included. It is preferable that the mixing ratio of the sheet-shaped member is within the range because the sheet-shaped member has high water permeability and strength.

The above-mentioned sheet-like member can be manufactured by a known method. For example, paper made of glass fiber, ceramic fiber or alumina fiber is mixed with a binder such as alumina sol and a filler such as alumina hydrate. It can be obtained by immersing in a slurry, drying, corrugating, and then performing a drying treatment and a heat treatment to remove water and organic components. When silica or titania is contained in addition to alumina, the compounding amount of silica and titania is usually 5 to 40 parts by weight with respect to 100 parts by weight of alumina, respectively.

In the oblique honeycomb, the thickness of the sheet-like member is usually 200 to 1000 μm, preferably 300 to 8
It is 00 μm. The porosity of the oblique honeycomb is usually 50 to 80%, preferably 60 to 75%. By setting the porosity within the above range, it is possible to achieve appropriate permeability and improve the contact efficiency between air and water. When the sheet-shaped member has the above-mentioned thickness and porosity, the liquid-gas ratio and the permeation rate of water are in appropriate ranges, the contact efficiency between water and air is increased, and the strength is sufficient.

The height of the oblique honeycomb 3 is 200 to 800.
mm, preferably 400-600 mm. Height is 200
If it is less than mm, the temperature of the cooling water flowing down to the lowermost portion of the oblique honeycomb is still low, and it is not preferable because it is discharged without being effectively used as cooling water. Further, if the height exceeds 800 mm, the difference between the temperature of the cooling water flowing down to the bottom of the oblique honeycomb and the temperature of the air to be cooled becomes small, and the heat exchange efficiency at the lower part of the oblique honeycomb decreases, which is not preferable. .

As a method for forming the above-mentioned sheet-shaped member into a corrugated sheet, a known corrugator in which a flat sheet is passed between a plurality of wide gears having undulating undulations radially oscillating is formed. The method used may be mentioned. As a method for forming the oblique honeycomb from the obtained corrugated sheet, for example, first, the corrugated sheet is 100 mm in length (thickness dimension after oblique honeycomb formation) × 800 mm in width (width after oblique honeycomb formation). Direction or height dimension), a rectangular corrugated sheet is prepared by arranging and cutting so that the wave propagation direction is 15 to 45 degrees with respect to one side of the rectangular mold. Then, a method of arranging the obtained rectangular corrugated sheets so that the wave propagation directions of every other sheet cross each other, and bonding and laminating them. When manufactured in this manner, the thickness of one oblique honeycomb is the vertical length of the cutting die. For this reason, for example, when the thickness of the oblique honeycomb incorporated in one cooling unit, that is, the dimension between the front opening and the rear opening of the oblique honeycomb is required to be 300 mm, a cutting die having a length of 100 mm is used. Thickness produced in 1
When the 00 mm diagonal honeycomb is used, three diagonal honeycombs may be stacked in the thickness direction. When the size of one oblique honeycomb in the height direction or the width direction is insufficient, a plurality of oblique honeycombs may be stacked in the height direction or arranged in the width direction. When a plurality of stacked honeycombs are used or arranged side by side, the oblique honeycombs may or may not be bonded. In the case of not adhering, it is only necessary to arrange a plurality of oblique honeycombs on top of each other or side by side.

The cooling water supply means 2 used in the cooling unit 5 supplies the cooling water to the upper opening of the oblique honeycomb 3. Although the form of the cooling water supply means 2 is not particularly limited, for example, an ordinary water supply duct 23 for simply dropping water droplets shown in FIG. 1 or a water supply pipe (not shown) with a spray nozzle attached to the top surface of the oblique honeycomb. The thing etc. which were made to be able to distribute and be supplied to an opening part are mentioned. Further, it is preferable that the cooling water supply means 2 is capable of adjusting the amount of water so that the minimum necessary amount of cooling water is supplied to the oblique honeycomb 3.

The water receiving portion 4 used in the cooling unit 5 is
It receives the discharged water discharged from the lower surface opening 104 of the oblique honeycomb 3. Although the form of the water receiving part 4 is not particularly limited, for example, there is a rain gutter-shaped water receiving pan shown in FIG. 1, and the water receiving part 4 discharges discharged water to the outside of the water receiving part 4. The tube 41 may be provided. Cooling unit 5
Are usually assembled and fixed in a frame not shown.
At this time, the water supply duct 23 and the upper opening 1 of the oblique honeycomb
It is preferable to form a small gap with 01 because the water can be uniformly dispersed over the entire upper opening 101 of the oblique honeycomb. Also, the lower surface opening 1 of the oblique honeycomb
04 and the water receiving portion 4 are preferably arranged as close to each other as possible in terms of space saving.

The air cooling device 1 further comprises a blowing means for introducing cooling air into the front opening 103 of the oblique honeycomb 3 and discharging cooling air from the rear opening 102 of the oblique honeycomb 3. . As the blowing means, for example,
A blower equipped with a fan can be used. Further, the air cooling device 1 may be provided with a cooling means (not shown) for cooling the discharged water and a water circulation means for supplying the discharged water to the cooling water supply means 2 so that the oblique cooling honeycomb 3 is flowed down and warmed by the air to be cooled. It is preferable in that the cooling water (exhaust water) can be reused. Examples of the cooling means include a heat exchanger. Further, as the water circulation means, for example, a circulation pump can be mentioned.

Next, the air cooling method of the first embodiment will be described with reference to FIG. First, diagonal honeycomb 3
To the upper opening 101 of the cooling water supply means 2 from the cooling water supply means 2.
Run down 2. At this time, the supply amount of the cooling water 12 is appropriately adjusted to bring the entire oblique honeycomb 3 into a wet state. Next, the air to be cooled is introduced from the front opening 103 of the oblique honeycomb 3 in the direction of arrow 9 in FIG. In the cells in the oblique honeycomb 3, the cooling water 12 flowing down and the cooled air to be introduced are brought into direct gas-liquid contact with each other to cool the cooled air, and at the same time, chemical pollutants and the like are contained in the cooled air. If present, the chemical contaminants and the like are taken into the cooling water 12. The cooling water 12 that has been warmed by heat exchange and has taken in chemical pollutants in some cases becomes discharge water 13 when it has flowed down the oblique honeycomb 3 and moves to the water receiving portion 4. The drainage water 13 in the water receiving section 4 is drainage pipe 41.
The discharged water 13 is supplied to a heat exchanger through a circulation pump (not shown) and cooled to a predetermined temperature, and the cooled discharged water 13 is supplied again to the cooling water supply means 2 and is reused as the cooling water 12. On the other hand, cooled cooling air is obtained from the rear opening 102 of the oblique honeycomb 3.

The air cooling method according to the first embodiment is
A cooling unit including a diagonal honeycomb in which the air to be cooled and the cooling water come into direct contact is used, and since the height of the diagonal honeycomb is within a predetermined range, the cooling water can be used while being cooled, and thermal efficiency is good. The liquid gas ratio is small, the pressure loss is small, space and energy can be saved, and the cost is low.

The air cooling device used in the present invention can use a plurality of cooling units 5. Examples of the arrangement of the cooling units 5 in this case include a plurality of arrangements in the vertical direction of the oblique honeycomb 3 (multistage arrangement) and a plurality of arrangements in the flow direction of the cooled air (multirow arrangement). ,
A plurality of oblique honeycombs 3 are arranged in the width direction, and
An aspect of a composite arrangement in which one or more of these arrangements are combined is included. The vertical direction of the oblique honeycomb 3 is a direction connecting the upper surface opening and the lower surface opening of the oblique honeycomb 3, and the flow direction of the air to be cooled is the front surface opening and the rear surface opening of the oblique honeycomb 3. It is the direction of tying, and the diagonal honeycomb 3
The width direction is a direction substantially orthogonal to the vertical direction and the flow direction of the cooled air. Therefore, an air cooling method using an air cooling device using a plurality of cooling units 5
An example of the embodiment will be described with reference to FIGS. 2 and 3. 2 is a schematic view of an air cooling device used in this example, FIG.
FIG. 3 is a schematic view of the air cooling device used in this example as seen from the side orthogonal to the flow direction of cooled air. In FIG. 3, a gap is seen between the oblique honeycombs adjacent to each other in the flow direction of the air to be cooled, but this is for easier understanding of the drawing. Portion 102 and front opening 10 of the oblique honeycomb behind the portion 102
3 is in contact with or close to.

In the air cooling device used in the air cooling method in the second embodiment, FIG. 1 in FIG. 2 and FIG.
The same components as those of 1 are denoted by the same reference numerals and the description thereof is omitted, and only different points will be mainly described. 2 and 3
1 differs from FIG. 1 in that 12 cooling units 5 are used, they are arranged in three stages in the vertical direction, and four rows are arranged in the flow direction of the air to be cooled, and the cooling water system and the drainage system are circulation systems. In point. That is, in the second embodiment, in the air cooling device 1A, the first row from the front in the flow direction of the air to be cooled, the cooling unit 5a ₁ from the top in the vertical direction,
5a ₂ and 5a ₃ are arranged, then the second row in the same direction is arranged in the vertical direction from above, and the cooling units 5b ₁ , 5b ₂ , 5b ₃ are arranged, and then the third row in the same direction is arranged in the vertical direction. Cooling units 5c ₁ , 5c ₂ and 5c ₃ are arranged from the top to the bottom, and then the fourth row in the same direction is vertically arranged from above in the cooling unit 5
placing the _{d 1, 5d 2, 5d 3} . Further, the water circulation system includes a water circulation means 6 for supplying the discharge water discharged from the water receiving part 4 through the discharge pipe 15 to the cooling water supply means 2 through the water supply pipe 10 and a cooling means 7 for cooling the discharge water.

Branch from the water supply pipe 10 and supply water collectively for each stage
The branch water pipes 111, 112, and 113 are
Rejection unit 5a₁5b₁5c₁5d₁Cooling water supply hand
Stage 2, 2, 2, 2, middle stage cooling unit 5a₂5b₂,
5c₂5d₂Cooling water supply means 2, 2, 2, 2 and lower stage
Cooling unit 5a₃5b₃5c₃5d₃Supply of cooling water
They are respectively connected to the feeding means 2, 2, 2, 2. one
, Upper cooling unit 5a₁5b₁5c₁5d₁of
Water receiving unit 4, 4, 4, 4, middle stage cooling unit 5a ₂5,
b₂5c₂5d₂Water receiving part 4, 4, 4, 4 and lower
Cooling unit 5a₃5b₃5c₃5d₃Water receiving part 4,
4, 4, 4 and branch drain pipes 151, 152 of the drain pipe 15,
153 and 153 are connected respectively, and the wastewater is collected collectively for each stage.
is doing.

In each cooling unit 5, a plurality of oblique honeycombs 3 may be arranged in the width direction. That is, the oblique honeycomb 3 may be a laterally arranged form of divided oblique honeycombs. Further, the installation form of each cooling unit 5 in the air cooling device 1A is not particularly limited,
A method of stacking the cooling units 5 in the first embodiment in the up-down direction, arranging them in the front-rear direction, and fixing them on the frame body can be mentioned. In this case, the width in the front-rear direction of the water receiving portion 4 is set to be approximately the same as the thickness of the oblique honeycomb 3, and when assembled in the front-rear direction, the rear opening 102 of the front oblique honeycomb and the front opening of the rear oblique honeycomb are opened. It is preferable to perform the contact with or close to the portion 103 in terms of space saving.

The air cooling device 1A may discard the discharged water 13 of the water receiving portion 4 without providing a circulation pump or a heat exchanger, as in the case of the air cooling device 1, or in the cooling water. A pure water purifying device for removing the impurities may be incorporated. Further, the cooling unit 5 is housed in a housing 14 having wall portions on both left and right sides and upper and lower sides as shown in FIGS. 2 and 3, and the air to be cooled passes through only the front opening portion of the oblique honeycomb 3. It is preferable to do so. The form of the housing 14 is not particularly limited, but it is preferable that there is no or substantially no gap between the cooling unit and the housing because the thermal efficiency is high. In addition, it is preferable in terms of ventilation efficiency to connect the discharge port of the blower to the front opening of the housing 14 by a duct and supply the cooled air through the duct.

Next, an air cooling method according to the second embodiment will be described with reference to FIGS. First, the cooling water 12 is simultaneously flown down to the respective upper surface openings 101 of the upper four, the middle four and the lower four oblique honeycombs 3. At this time, the supply amount of the cooling water 12 and the water sprinkling method are appropriately adjusted so that the entire 12 oblique honeycombs 3 are in a wet state. Next, the air to be cooled is supplied from the front surface opening portions 103 of the three oblique honeycombs 3 in the front by a blower means (not shown) or the like.
Introduce in the direction of the arrow inside. In the cells in the twelve oblique honeycombs 3, the cooling water 12 flowing down and the cooling air to be introduced come into direct gas-liquid contact with each other to cool the cooling air and also to chemically pollute the cooling air. When a substance or the like is present, the chemical contaminant or the like is taken into the cooling water 12. The cooling water 12 which has been warmed by heat exchange and which has taken in chemical pollutants in some cases becomes discharged water when flowing down the respective oblique honeycombs 3 and moves to the water receiving part 4. Water receiving part 4
The drainage water inside is the branch drain pipe 151 arranged at each stage,
The discharged water 13 which is supplied to the heat exchanger 7 by the circulation pump 6 through 152 and 153 and the drain pipe 15 and is cooled to a predetermined temperature is supplied again to the cooling water supply means 2.
It is reused as the cooling water 12. On the other hand, cooled cooling air is obtained from the rear opening 102 of the oblique honeycombs 5d ₁ , 5d ₂ , 5d _{3 in} the last row.

According to the air cooling method of the second embodiment, the same effect as that of the air cooling method of the first embodiment can be obtained, and in addition, since there are a plurality of stages in the vertical direction, one skew is provided. The height of the honeycomb can be shortened, and the temperature of the cooling water remains low even below the diagonal honeycomb, which improves the thermal efficiency. Furthermore, the flow velocity of the air to be cooled can be increased by providing a plurality of rows in the flow direction of the air to be cooled. Therefore, it is possible to save space and save energy.

In the present invention, the air to be cooled is not particularly limited, but in addition to clean air, high performance (ULP
A) It is also possible to use air containing fine chemical contaminants that pass through the filter mesh. Here, examples of the chemical contaminants include inorganic metal elements such as sodium, potassium, calcium, and boron, anions such as fluorine ion, chloride ion, nitrate ion, nitrite ion, sulfate ion, and sulfite ion, and ammonium. Examples thereof include cations such as ions.

In the air cooling device used in the present invention, since the air to be cooled and the cooling water are in direct contact with each other, these chemical contaminants can be taken into the cooling water to obtain clean cooling air. When the amount of chemical pollutants in the cooled air is large, as a means for removing the chemical pollutants in the discharge water between the water receiving part 4 and the cooling water supply means 2, if necessary, for example, It is preferable to use a water purifying device incorporating an ion exchange resin or the like because the cooling water can be kept clean.

In the air cooling method according to the present invention, the temperature of the air to be treated is not particularly limited.
The temperature is 20 ° C or higher, preferably 25 ° C or higher, more preferably 30 ° C or higher. The higher the temperature of the cooled air is, the more the thermal efficiency is generally improved, which is preferable. The water temperature of the cooling water supplied to the cooling unit 5 at the upper opening 101 of the oblique honeycomb is usually 7 to 10 ° C., and the discharged water at the lower opening 104 of the oblique honeycomb arranged in the first row. The water temperature is usually 2.5 ° C. or higher, preferably 5.
Lower by 0 ° C or more. It is preferable to operate the apparatus under such conditions because the thermal efficiency is increased.

Further, in the present invention, the liquid gas ratio L / G _400-200 of the cooling water supply amount and the cooling air supply amount per one cooling unit is usually 0.1 to 0.5 kg / kg. , Preferably 0.2 to 0.4 kg / kg. Where L / G
_400-200 is a weight ratio of the amount of supplied water to the amount of supplied air per unit time in the case where the height of each oblique honeycomb in the cooling unit is 400 mm and the thickness is 200 mm. The size of one diagonal honeycomb is 400
mm, the weight ratio L / G of the supply water for the amount of air supplied per unit of time per oblique honeycomb when not thick 200mm, relative to the value of L / G _{40 0-200,} oblique honeycomb 1 It decreases in inverse proportion to the increase in height per piece, and increases in proportion to the increase in thickness. For example, when L / G _400-200 is 0.3, the size of one diagonal honeycomb is 80
When the thickness is 0 mm and the thickness is 200 mm, the oblique honeycomb has an L / G of 0.15, and when the height is 400 mm and the thickness is 600 mm, the L / G is 0.9. In the present invention, since the thermal efficiency is good, the air can be sufficiently cooled even if the liquid-gas ratio is small as in the above range.

When a plurality of cooling units are used, the number of cooling units is not limited to the above-mentioned embodiment, and may be set as appropriate. For example, the power of the fan and the air to be cooled passing through the oblique honeycomb may be changed. Required opening area based on space velocity
(Ao) is calculated and set to a number that satisfies Ao. The space velocity of the cooled air at this time is, for example, 1.5 to 3.0 m / sec. Further, the cooling water supply means and the water receiving portion may or may not be independently provided in each cooling unit. That is, a plurality of cooling units arranged in the width direction may share the cooling water supply means or the water receiving portion in each stage. For example, when the cooling unit is formed in two rows in the width direction of the front opening of the oblique honeycomb and three stages in the height direction, the cooling water supply means and the water receiving portion of each stage are arranged in two rows in the width direction. It may be shared by the cooling units. In this way, it is preferable to share the cooling water supply means and the like in each stage because the cost can be reduced.

The air cooling method according to the present invention can be used as an air cooling method for air in office buildings, hospitals, and production plants.

[0037]

EXAMPLES Next, the present invention will be described more specifically by way of examples, but the present invention is not limited thereto. Example 1 A glass nonwoven fabric formed of E glass fiber and an organic binder was dipped in a slurry containing alumina hydrate as a filler and alumina sol as a binder, dried, and corrugated to form a corrugated product. Obtained. The corrugated products were alternately stacked so that the propagation directions of the waves intersect with each other and then heat-treated at 500 ° C. to obtain a total amount of alumina and a cured product of alumina sol of 80.
A diagonal honeycomb having a porosity of 65%, a mountain height of 4.8 mm, and a pitch of 10 mm was prepared, which was composed of 20% by weight of E glass fiber and 20% by weight of E glass fiber. This diagonal honeycomb has a width of 1000 mm, a height of 400 mm, and a depth of 200 mm with respect to the air ventilation direction.
The angle at which the wave propagation directions of alternate layers of the corrugated sheet intersect with each other (reference numeral Y in FIG. 1) is 60 degrees, and air when viewed from both the front and rear surfaces of the cell extending diagonally. The oblique angle (X in FIG. 1) with respect to the inflow and outflow directions (horizontal direction) is 30 degrees. Next, this oblique honeycomb was installed in a case that was large enough to hold the front surface, rear surface, upper surface, and lower surface, and a water supply pan with a nozzle for supplying cooling water to the honeycomb was attached to the upper part, and this lower part. And a drain pan for receiving the cooling water that has passed through the honeycomb are attached to form one cooling unit. This cooling unit has a height of 500 including the water supply pan and drain pan.
mm, width 1000 mm, depth 200 mm. Next, this cooling unit is 1000 mm wide and 1500 m high.
m, with a depth of 200 mm in a housing with front and rear openings,
It was built in three stages (upper and lower stages).
3 units in total. ). Further, the cooling water whose temperature has been raised in the drain pan is sent to the water-cooling heat exchanger via the water pump, cooled, and circulated and supplied to the water pan above the honeycomb. Conditions of cooling unit etc. Table 1
And shown in Table 2.

The above device is ventilated with air at 32 ° C. and 70 rh% at a flow rate of 7200 m ³ / hour, which is the same air condition as in summer, and the cold water at 7 ° C. is supplied from the water supply unit to a unit of 21 L / min (liquid Gas ratio L / G = 0.29kg / k
g) A total of 63 L / min was supplied by 3 units, and the temperature, humidity and pressure loss of the air cooling device of the outlet air were measured. The results are shown in Table 3.

Reference Example 1 As a cooling unit, a diagonal honeycomb having a width of 1000 mm, a height of 1200 mm and a thickness of 200 mm was used, and a width of 1000 mm including a water supply pan and a drain pan, a height of 1300 mm and a depth of 200.
mm Cooling unit arranged in one stage (cooling unit 1
Arranged in 1 column. 1 unit in total. ), And the temperature and humidity of the outlet air and the pressure loss of the air cooling device were measured in the same manner as in Example 1 except that a casing having a similar shape and capable of accommodating the cooling unit was used. The conditions of the cooling unit and the measurement results are shown in Tables 1 to 3. In this example,
During operation, a carry-over phenomenon occurred in which a considerable amount of cooling water was scattered with the wind to the leeward side of the honeycomb. Although the L / G is the same as that of the first embodiment, the L / G
_{It is probable} that _400-200 was larger than that of Example 1 and the amount of cooling water in the depth direction of the oblique honeycomb was too large, and this occurred.

Comparative Example 1 In the same manner as in Example 1 except that the air cooling device used in Example 1 was replaced by a fin coil type heat exchanger (manufactured by Sakaigawa Industry Co., Ltd.) under the conditions shown in Table 2. Outlet air temperature,
The humidity and the pressure loss of the air cooling device were measured. Tables 1 to 3 show conditions and measurement results of the fin coil heat exchanger and the like.

Example 2 The temperature and humidity of the outlet air and the pressure loss of the air cooling device were measured in the same manner as in Example 1 except that the height of the oblique honeycomb was 3.5 mm and the pitch was 7.5 mm. The conditions of the cooling unit and the measurement results are shown in Tables 1 to 3.

Example 3 The cooling unit produced in Example 1 was assembled in a housing having a width of 1000 mm, a height of 1500 mm, a depth of 600 mm and an opening on the front surface and the rear surface in three rows in the vertical direction and three rows in the front-back direction ( (3 cooling units arranged in 3 rows and 3 columns. 9 units in total)
Except for this, the apparatus configuration was the same as in Example 1, and the measurement conditions were as shown in Tables 3 and 4, and the outlet air temperature, humidity, and pressure loss of the air cooling device were measured. In addition, since the present embodiment is intended to cool the outside air intake for a clean room of a semiconductor factory, the content of impurity ions in the air at the intake and the removal rate of impurity ions in the air after cooling are further considered. Also measured. The impurity ion concentration was determined by absorbing and collecting air at the air intake port and air after cooling with an impinger containing ultrapure water, and analyzing the collected liquid with an ion chromatograph. The conditions of the cooling unit and the measurement results are shown in Tables 1 to 4.

[0043]

[Table 1]

[0044]

[Table 2]

[0045]

[Table 3]

[0046]

[Table 4]

From Tables 1 to 4, the following can be understood. That is, in the reference example 1, the temperature of the outlet air becomes higher with the same amount of water as the example 1. In Comparative Example 1, the air pressure loss was large, a large amount of cooling water was required, and the depth of the fin coil installation space was required to be three times that of Example 1 in which the cooling performance was equivalent. In Example 2, by reducing the size of the honeycomb cell, the depth of the installation space could be made smaller than in Example 1, and the amount of cooling water was also reduced. In Example 3, as the outlet air, the air condition in the clean room (23 ° C.,
A cooling air of 10.5 ° C. and 100 RH% compatible with 45 RH% was obtained. Further, it was found that 90% or more of NH ₄ ⁺ , SO ₄ ²⁻ and NO ₂ ⁻ could be removed.

[0048]

When the air cooling method according to the present invention is used,
For example, with respect to the intake air and circulating air in office buildings and factories, a simple structure called a diagonal honeycomb has good thermal efficiency, a small liquid-gas ratio, a small pressure loss, space and energy saving, and further cost reduction. .

[Brief description of drawings]

FIG. 1 is a schematic view showing a part of an air cooling device used in the present invention by cutting out.

FIG. 2 is a schematic view of another air cooling device used in the present invention.

FIG. 3 is a schematic view of another air cooling device used in the present invention viewed from a side orthogonal to the flow direction of cooled air.

[Explanation of symbols]

1 Air Cooling Device 2 Water Dispersing Device (Cooling Water Supply Means) 3 Oblique Honeycomb 4 Water Receiving Pan (Water Receiving Part) 5, 5a ₁ , 5a ₂ , 5a ₃ , 5b ₁ , 5b ₂ , 5b ₃ , 5c
₁ , 5c ₂ , 5c ₃ , 5d ₁ , 5d ₂ , 5d ₃ 5 Cooling unit 6 Circulation pump (water circulation means) 7 Heat exchanger 8 Cooling water for cooling discharged water 9 Arrows showing the flow direction of air 10 Water pipe 11 Make-up water arrow 12 Cooling water 13 Discharged water 14 Housing 15 Drain pipes 21, 22 Corrugated sheets 23 adjacent to each other Water supply duct 101 Oblique honeycomb top opening 102 Oblique honeycomb rear opening 103 Oblique honeycomb front opening 104 Diagonal Honeycomb Lower Surface Openings 111, 112, 113 Branch Water Pipes 151, 152, 153 Branch Drain Pipes

Continued front page    (71) Applicant 000206211             Taisei Corporation             1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo (71) Applicant 000169499             Takasago Thermal Engineering Co., Ltd.             8-2 Kanda Surugadai, Chiyoda-ku, Tokyo (71) Applicant 000005452             Hitachi Plant Construction Co., Ltd.             1-1-14 Kanda, Uchikanda, Chiyoda-ku, Tokyo (72) Inventor Tadahiro Omi             2-1-17 Yonegabukuro, Aoba-ku, Sendai City, Miyagi Prefecture             301 (72) Inventor Yasuyuki Shirai             3 Chi, 33, Yagiyama Kasumi-cho, Taishiro-ku, Sendai City, Miyagi Prefecture             Sun apartment Yagiyama Kasumicho 803 (72) Inventor Sadao Kobayashi             4-13-11 Hongodai, Sakae Ward, Yokohama City, Kanagawa Prefecture (72) Inventor Isao Terada             1-70 Nichi, Daikokucho, Tsurumi-ku, Yokohama-shi, Kanagawa             Assur Inc. Tsurumi Research Center (72) Inventor Toshihisa Okabe             1-70 Nichi, Daikokucho, Tsurumi-ku, Yokohama-shi, Kanagawa             Assur Inc. Tsurumi Research Center (72) Inventor Takashi Taniguchi             1-70 Nichi, Daikokucho, Tsurumi-ku, Yokohama-shi, Kanagawa             Assur Inc. Tsurumi Research Center (72) Inventor Naoki Mori             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Hiroshi Ito             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Kei Wakayama             1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. (72) Inventor Hitoshi Inaba             8-2 Kanda Surugadai, Chiyoda-ku, Tokyo               Takasago Thermal Engineering Co., Ltd. (72) Inventor Kazuo Saito             8-2 Kanda Surugadai, Chiyoda-ku, Tokyo               Takasago Thermal Engineering Co., Ltd. (72) Inventor Kikuji Kobayashi             1-14-1 Uchikanda, Chiyoda-ku, Tokyo             Stand Plant Construction Co., Ltd. (72) Inventor Hideo Hanaoka             1-14-1 Uchikanda, Chiyoda-ku, Tokyo             Stand Plant Construction Co., Ltd. F-term (reference) 3L053 BB05

Claims (11)

[Claims] 1. A diagonal honeycomb, which is open on both front and rear surfaces and upper and lower surfaces, and is arranged such that cooled air is introduced from a front opening and cooling air is discharged from a rear opening,
Using a cooling unit having cooling water supply means for supplying cooling water to the upper opening of the oblique honeycomb, and a water receiving part for receiving discharged water discharged from the lower opening of the oblique honeycomb, An air cooling method of introducing cooling air into a front opening of the oblique honeycomb and discharging cooling air from a rear opening of the oblique honeycomb, wherein at least one cooling unit is used and The height of each of the diagonal honeycombs is 200 to 800 mm
An air cooling method characterized by: 2. The air cooling method according to claim 1, further comprising cooling means for cooling the discharge water and water circulation means for supplying the discharge water to the cooling water supply means. 3. The air cooling method according to claim 1, wherein a plurality of the cooling units are arranged vertically. 4. The air cooling method according to claim 1, wherein a plurality of the cooling units are arranged in the flow direction of the air to be cooled. 5. The air cooling method according to claim 1, wherein a plurality of the cooling units are arranged in the width direction. 6. The air cooling method according to claim 5, wherein a plurality of the cooling units arranged in the width direction share the cooling water supply means or the water receiving portion in each stage. 7. The sheet-like member constituting the oblique honeycomb is one or more fillers or binders selected from the group consisting of alumina, silica and titania, and glass fibers, ceramic fibers or alumina fibers. The air cooling method according to any one of claims 1 to 6, wherein the air cooling method comprises: 8. The oblique honeycomb has a porosity of 50 to 8
It is 0%, Any one of Claims 1-7 characterized by the above-mentioned.
The method for cooling air according to the item. 9. The oblique honeycomb has a cell mountain height of 2.
The air-cooling method according to claim 1, wherein the air-cooling method is 5 to 8.0 mm. 10. The water temperature of the cooling water in the upper opening of the oblique honeycomb arranged in the first row is higher than that of the discharged water in the lower opening of the oblique honeycomb by 2.
It is lower by 5 ° C. or more, and any one of claims 1 to 9 is characterized.
The air cooling method according to item 1. 11. A liquid gas ratio L / G of the supply amount of the cooling water and the supply amount of the cooled air per cooling unit.
The air cooling method according to any one of claims 1 to 10, wherein _400-200 is _0.1 to 0.5 kg / kg.