Variable flow sprinkler, method of adjustment and cooling tower

Abstract

The application discloses a variable flow nozzle, a regulating method and a cooling tower, and belongs to the field of cooling tower technology. The variable flow nozzle comprises a variable flow float, a nozzle fixing part, a double-flow nozzle body and a double-layer water distribution disc. The nozzle fixing part is fixed in a water distribution tray, and the variable flow float is coaxially arranged above the nozzle fixing part. The variable flow float floats up and down according to the water surface of the water distribution tray, and is used for controlling the opening degree of the double-flow nozzle body. The double-flow nozzle body is fixed below the nozzle fixing part, and is used for changing the direction and flow area of water flow. The double-layer water distribution disc is arranged below the double-flow nozzle body, and is used for controlling the diffusion of water flow. The double-flow nozzle body is designed, the uniformity of water distribution at small flow is improved, the adaptability to variable flow is improved, the double-layer water distribution disc is designed, the uniformity of the outer layer and the inner layer of water distribution is better improved, and therefore the heat dissipation efficiency of the cooling tower is improved, and the adaptability of the cooling tower to different flows can be realized.

Description

Technical Field

[0001] This application relates to the technical field of large-scale water-cooled units, specifically to a variable flow nozzle, an adjustment method, and a cooling tower. Background Technology

[0002] With the development of data centers, the demand for large-scale water-cooled unit systems is increasing. In the development of these systems, the cooling tower, as a heat dissipation device, is becoming increasingly important. As the cooling capacity of water-cooling systems increases, the power of cooling towers is also gradually increasing. To better improve the heat dissipation efficiency of cooling towers and their adaptability to different flow rates, a nozzle design that provides both uniform and variable flow rate water distribution is particularly important.

[0003] Traditional sprinklers directly impact the water distribution plate, resulting in the loss of most of the water's kinetic energy. The remaining energy is used to propel the water outwards, but the dispersion distance is short and the uniformity is poor. Furthermore, traditional rotary sprinklers, with only a single rotating distribution plate, result in good water dispersion outside the sprinkler head after the water flow disperses, but less dispersion directly below the impact point. Additionally, existing sprinkler designs for variable flow rates typically use variable flow holes in the sprinkler wall. Water flows through these holes to control the flow rate, but this method is ineffective and cannot handle extremely low flow rates.

[0004] One existing solution involves using a float-type crossflow tower variable flow nozzle. This nozzle has a plug-type float that descends at low flow rates, blocking some of the flow and increasing water pressure. At higher flow rates, the float valve rises to open the flow channel. However, this design suffers from significant channel blockage at low flow rates, resulting in poor diffusion on the distribution plate despite the higher water pressure.

[0005] Another solution in the prior art is to use a crossflow tower variable flow nozzle, which is equipped with a water distribution plate with variable height. When the flow rate is small, the water distribution plate rises, raising the water distribution position, increasing the water diffusion time, and improving the uniformity of water replenishment. When the water flow rate is large, the water distribution position is lowered, reducing the water diffusion time. However, this design has many moving parts, and long-term use can easily lead to damage to the moving parts, causing the water distribution to fail.

[0006] Another solution in the existing technology is to use a variable flow nozzle, which changes the flow through a variable flow orifice. The water distribution plate is fixed, and the variable flow effect relies on the side opening. It is prone to clogging after long-term use, and the fixed water distribution plate has poor water distribution effect. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a variable flow nozzle, adjustment method, and cooling tower that can reduce kinetic energy loss from water flow impact, guide water flow direction, and improve water distribution uniformity.

[0008] The present invention adopts the following technical solution.

[0009] The first aspect of the present invention discloses a variable flow nozzle, comprising: a variable flow float, a nozzle fixing component, a dual-channel nozzle body, and a double-layer water distribution plate;

[0010] The nozzle fixing component is fixed in the water distribution plate, and the variable flow float is coaxially arranged above the nozzle fixing component; the variable flow float floats up and down according to the water surface in the water distribution plate to control the opening of the inner and outer flow channels in the dual-channel nozzle body; the dual-channel nozzle body is fixed below the nozzle fixing component to change the direction and flow area of ​​the water flow; the double-layer water distribution plate is arranged below the dual-channel nozzle body to control the diffusion of the water flow.

[0011] Preferably, the dual-channel nozzle body includes: a main body fixed end, an outwardly expanding spiral blade, and an inner flow channel; one end of the main body fixed end is connected to the nozzle fixing member, and the other end is connected to the inner flow channel; the variable flow float is disposed above the top opening of the inner flow channel, and the outwardly expanding spiral blade is disposed on the outside of the inner flow channel.

[0012] Preferably, the inner flow channel is an outwardly expanding curved surface that gradually increases in size, and the outer wall surface of the nozzle body is also an outwardly expanding curved surface that gradually increases in size. An outer flow channel is formed between the inner flow channel and the outer wall surface of the nozzle body. The flow surface of the outer flow channel gradually decreases in size, and the outwardly expanding spiral blade is a curved blade that passes through the outer flow channel.

[0013] Preferably, the dual-channel nozzle body further includes: a water distribution plate fixing rod; the water distribution plate is connected through a round hole on the water distribution plate fixing rod.

[0014] Preferably, the double-layer water distribution plate includes: a water distribution plate fixing shaft, an outer water distribution plate, and an inner water distribution plate; the outer water distribution plate is fixedly disposed above the inner water distribution plate, and the water distribution plate fixing shaft passes through and is fixed in the middle hole of the outer water distribution plate and the inner water distribution plate respectively, and is connected to the inner flow channel.

[0015] Preferably, the diameter of the middle hole of the outer layer water distribution plate is smaller than the lower end diameter of the inner flow channel, larger than the upper end diameter of the inner flow channel, and equal to the diameter of the inner layer water distribution plate.

[0016] Preferably, the outer water distribution plate has a wall that expands outward from small to large, and the water flow changes from a vertically downward axial flow direction to a radial flow that is close to parallel to the ground along the wall.

[0017] Preferably, the inner water distribution plate includes: a medium-distance water distribution channel and a short-distance water distribution channel. The inner water distribution plate and the outer water distribution plate rotate under the action of water flow. During the rotation of the inner water distribution plate, the water flow is dispersed. The water is thrown out in the groove of the medium-distance water distribution channel, and its water distribution diameter is larger than the water distribution diameter thrown out in the short-distance water distribution channel.

[0018] The second aspect of the present invention discloses an adjustment method for adjusting a variable flow nozzle as described in the first aspect. When the variable flow float will rise according to the water flow in the water distribution plate, the inner flow channel and the outer flow channel of the dual-channel nozzle body are opened at the same time, and the water flow enters the inner flow channel and the outer flow channel respectively, driving the double-layer water distribution plate to rotate for water distribution.

[0019] When the variable flow float moves downward according to the water flow in the water distribution plate, until the variable flow float completely closes the flow area of ​​the inner channel, all the water flow is introduced into the outer channel, driving the double-layer water distribution plate to rotate and distribute the water.

[0020] When the variable flow float moves up and down according to the water flow in the distribution plate, it adjusts the flow area of ​​the inner channel, thereby adjusting the flow rate of water entering the inner and outer channels, driving the double-layer water distribution plate to rotate for water distribution.

[0021] A third aspect of the present invention discloses a cooling tower comprising the variable flow nozzle described in the first aspect.

[0022] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0023] 1. The main body of the dual-channel nozzle is designed with an outward spiral design for the outer channel. This design can pre-change the direction and flow area of ​​the water flow, increase the water flow velocity, and change the water flow from a straight impact on the water distribution plate to an oblique impact. This can increase the rotation speed of the water distribution plate and improve the uniformity of water distribution. The inner channel is equipped with a variable flow float. The water flow in the inner channel is limited according to the water level. When the flow rate changes, the float moves up and down to change the amount of water passing through the inner channel. At low flow rates, more water is introduced into the outer channel with better diffusion, which improves the uniformity of water distribution at low flow rates and adaptability to variable flow rates.

[0024] 2. The design features a double-layered water distribution tray. The outer large water distribution tray has a curved outward expansion design to reduce the kinetic energy loss from water flow impact and guide the direction of water flow. The outer large water distribution tray is responsible for water distribution in the outer area, while the inner small water distribution tray is responsible for water distribution in the inner area, resulting in more uniform water distribution. The double-layered design allows for separation of the inner and outer layers, enabling independent water distribution and further enhancing the uniformity of the outer and inner water distribution layers.

[0025] This invention improves the heat dissipation efficiency of cooling towers by enhancing the uniformity of water distribution and adaptability to varying flow rates, and also enables the cooling towers to adapt to different flow rates. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall nozzle in this invention;

[0027] Figure 2 This is a schematic diagram of the main body of the outwardly expanding spiral-shaped dual-channel nozzle in this invention;

[0028] Figure 3 This is a schematic diagram of the double-layer outward-expanding rotating water distribution plate in this invention;

[0029] Figure 4 This is a schematic diagram of the inner water distribution plate in this invention;

[0030] In the diagram: 1. Variable flow float; 2. Nozzle fixing component; 3. Dual-channel nozzle body; 4. Double-layer water distribution plate; 5. Main body fixing end; 6. Outward-expanding spiral blades; 7. Inner flow channel; 8. Water distribution plate fixing rod; 9. Water distribution plate fixing shaft; 10. Outer water distribution plate; 11. Inner water distribution plate; 12. Mid-distance water distribution channel; 13. Close-distance water distribution channel. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0032] like Figure 1 As shown, Embodiment 1 of the present invention provides a variable flow nozzle, including: a variable flow float 1, a nozzle fixing component 2, a dual-channel nozzle body 3, and a double-layer water distribution plate 4;

[0033] The nozzle fixing component 2 is fixed in the opening of the water distribution plate. The variable flow float 1 is coaxially arranged above the nozzle fixing component 2 and is used to float up and down according to the water surface of the water distribution plate, thereby controlling the opening of the dual-channel nozzle body 3. The dual-channel nozzle body 3 is screwed into the nozzle fixing component 2 from below for installation, and is used to change the direction and flow area of ​​the water flow. The double-layer water distribution plate 4 is arranged below the dual-channel nozzle body 3 and is used to control the diffusion of the water flow.

[0034] like Figure 2 As shown, the dual-channel nozzle body 3 has an outward expansion design, and the diameter of the lower end of the dual-channel nozzle body 3 is larger than the diameter of the upper end. The dual-channel nozzle body 3 includes: a main body fixed end 5, an outward expansion spiral blade 6, an inner channel 7, and a water distribution plate fixing rod 8.

[0035] The nozzle body 3 is spirally connected to the nozzle fixing member 2 via the main body fixing end 5. Specifically, one end of the main body fixing end 5 is connected to the nozzle fixing member 2, and the other end is connected to the inner flow channel 7. The inner flow channel 7 is a hollow channel with openings at both ends. The variable flow float 1 is set above the top opening of the inner flow channel 7, and the outward expanding spiral blade 6 is set on the outside of the inner flow channel 7 to form an outer flow channel. The outer flow channel has an outward expanding spiral design, which can change the water flow direction and flow area in advance, increase the water flow velocity, change the water flow from a straight impact on the water distribution plate to an oblique impact, increase the rotation speed of the water distribution plate, and improve the uniformity of water distribution.

[0036] The inner flow channel 7 works in conjunction with the variable flow float 1. When the water flow rate changes, the variable flow float 1 moves up and down according to the water surface, changing the amount of water passing through the inner flow channel 7. When the flow rate is low, the variable flow float 1 descends, reducing the water intake of the inner flow channel 7, thereby introducing more water into the outer flow channel with better diffusion, improving the uniformity of water distribution at low flow rates. The main function of the water distribution plate fixing rod 8 is to fix the water distribution plate 4. The water distribution plate 4 is fixed through the round hole on the water distribution plate fixing rod 8, and the water distribution plate 4 is allowed to rotate.

[0037] It is worth noting that if the water flow directly hits the water distribution plate 4, it will cause a large loss of momentum. However, in the early stage of this application, the axial and radial directions of the water flow were changed by the outward expansion helical blades 6, which can increase the outward velocity of the water flow and provide inner layer water distribution through the inner flow channel 7.

[0038] In a preferred but non-limiting embodiment of the present invention, the inner flow channel 7 is an outwardly expanding curved surface that gradually increases in size, and the outer wall surface of the nozzle body 3 is also an outwardly expanding curved surface that gradually increases in size. An outer flow channel is formed between the inner flow channel 7 and the nozzle body 3, and the flow surface of the flow channel gradually decreases in size, thus narrowing the flow channel and increasing the flow velocity. The outwardly expanding spiral blades 6 are curved blades that pass through the outer flow channel. There are no specific requirements for their number or curvature, and they are all within the scope of this patent. The curved blades at the inlet of the outer flow channel are perpendicular to the ground, and the curvature of the curved blades gradually changes along the flow channel. The outlet angle of the curved blades gradually becomes parallel to the ground.

[0039] like Figure 3-4 As shown, the double-layer water distribution plate 4 includes: a water distribution plate fixing shaft 9, an outer water distribution plate 10, and an inner water distribution plate 11. The water distribution plate fixing shaft 9 passes through and is fixed to the middle holes of the outer water distribution plate 10 and the inner water distribution plate 11, respectively, and is connected to the inner flow channel 7. The diameter of the middle hole of the outer water distribution plate 10 is smaller than the lower diameter of the inner flow channel 7, larger than the upper diameter of the inner flow channel 7, and equal to the diameter of the inner water distribution plate 11.

[0040] The outer layer water distribution plate 10 is fixedly disposed above the inner layer water distribution plate 11. The inner layer water distribution plate 11 includes a mid-distance water distribution channel 12 and a near-distance water distribution channel 13. The inner layer water distribution plate 11 is connected to the outer layer water distribution plate 10 and rotates under the action of water flow. During the rotation of the inner layer water distribution plate 11, the water flow is dispersed. The water is thrown out in the groove of the mid-distance water distribution channel 12, and the water distribution diameter is relatively large. Since the near-distance water distribution channel 13 has no structure, the water leaks directly to the bottom, and the water distribution diameter is relatively small.

[0041] The outer water distribution plate 10 has an outward-expanding curved surface design to avoid energy loss from direct water flow impact and guide the direction of water flow. With the curved surface design of the outer water distribution plate 10, the water flow gradually changes direction and pushes the double-layer water distribution plate 4 to rotate, so that the water is evenly distributed to the space below the nozzle; the water in the inner flow channel flows along the inner flow channel 7 and flows to the inner water distribution plate 11.

[0042] In a preferred but non-limiting embodiment of the present invention, the outer water distribution plate 10 is designed with an outwardly expanding curved surface, the wall of which gradually expands outward from small to large. The water flow changes from a vertically downward axial flow direction to a radial flow that is close to parallel to the ground along the wall, reducing kinetic energy loss during water flow impact and increasing the water flow diffusion area. The blades of the outer water distribution plate 10 are arc-shaped curved surfaces, and the specific curvature is not limited, all of which are included in the present invention. The flow area of ​​the central hole is 30% of the total flow area.

[0043] The inner layer water distribution plate 11 is connected to the outer layer water distribution plate 10 as a whole. As the outer layer water distribution plate 10 rotates, it drives the inner layer water distribution plate 11 to rotate together. The water flow in the inner channel 7 passes through the middle distance water distribution channel 12 and the close distance water distribution channel 13 of the double-layer water distribution plate 4, which fully diffuses the water in the inner channel. The design of the double-layer inner and outer water distribution plates increases the uniformity of the outer and inner periphery of the water distribution.

[0044] In addition, since the outer layer of the water distribution plate 10 leaves a "blind zone" in the middle of the water distribution, the middle distance water distribution channel 12 and the close distance water distribution channel 13 of the inner layer of the water distribution plate 11 are designed to fill this part.

[0045] Embodiment 2 of the present invention provides a method for adjusting a nozzle, based on the variable flow nozzle described in Embodiment 1, comprising the following steps:

[0046] Installation: Place the nozzle fixing part 2 in the opening of the water distribution plate, and set the variable flow float 1 coaxially above the nozzle fixing part 2. Then screw the outward spiral double flow channel nozzle body 3 into the nozzle fixing part 2 from below for installation. The double-layer water distribution plate 4 is fixedly installed below the double flow channel nozzle body 3.

[0047] High flow rate use: When the flow rate is high, the water flow in the water distribution plate will cause the variable flow float 1 to float up, and at the same time open the inner and outer double flow channels of the double flow channel nozzle body 3. The water flow enters the inner and outer double flow channels respectively, thereby driving the double-layer water distribution plate 4 to rotate for water distribution.

[0048] Specifically, the water in the outer channel flows along the outward-expanding spiral blades 6, gradually changing the vertically downward flow to an oblique outward flow, reducing kinetic energy loss and increasing the flow velocity. The water flows obliquely outward, impacting the outer layer of the double-layered water distribution plate 4, the outer layer of the water distribution plate 10. The outer layer of the water distribution plate 10 has an outward-expanding curved surface design, avoiding energy loss from direct impact. Due to the curved surface design of the outer layer of the water distribution plate 10, the water gradually changes direction and pushes the double-layered water distribution plate 4 to rotate, distributing the water evenly to the space below the nozzle. The water in the inner channel flows along the inner channel 7 to the inner layer of the water distribution plate 11. The inner layer of the water distribution plate 11 is connected to the outer layer of the water distribution plate 10 as a whole. As the outer layer of the water distribution plate 10 rotates, it drives the inner layer of the water distribution plate 11 to rotate as well. The water in the inner channel flows through the middle-distance water distribution channel 12 and the near-distance water distribution channel 13 of the inner layer of the water distribution plate 11, fully dispersing the water in the inner channel.

[0049] Low flow rate use: When the flow rate is low, the variable flow rate float 1 floats downward according to the water flow in the water distribution plate. According to the water flow rate, the variable flow rate float 1 continues to descend until the flow area of ​​the inner flow channel 7 is completely closed, and all the water flow is introduced into the outer expansion spiral blade 6, i.e. the outer flow channel, so that the water flow is evenly diffused through the outer water distribution plate 10 with better diffusion effect.

[0050] Variable flow rate use: When the water flow rate changes during use, the variable flow rate float 1 will float up and down with the water surface of the water distribution plate.

[0051] Embodiment 3 of the present invention provides a cooling tower, including the variable flow nozzle as described in Embodiment 1.

[0052] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0053] 1. The main body of the dual-channel nozzle is designed with an outward spiral design for the outer channel. This design can pre-change the direction and flow area of ​​the water flow, increase the water flow velocity, and change the water flow from a straight impact on the water distribution plate to an oblique impact. This can increase the rotation speed of the water distribution plate and improve the uniformity of water distribution. The inner channel is equipped with a variable flow float. The water flow in the inner channel is limited according to the water level. When the flow rate changes, the float moves up and down to change the amount of water passing through the inner channel. At low flow rates, more water is introduced into the outer channel with better diffusion, which improves the uniformity of water distribution at low flow rates and adaptability to variable flow rates.

[0054] 2. The design features a double-layered water distribution tray. The outer large water distribution tray has a curved outward expansion design to reduce the kinetic energy loss from water flow impact and guide the direction of water flow. The outer large water distribution tray is responsible for water distribution in the outer area, while the inner small water distribution tray is responsible for water distribution in the inner area, resulting in more uniform water distribution. The double-layered design allows for separation of the inner and outer layers, enabling independent water distribution and further enhancing the uniformity of the outer and inner water distribution layers.

[0055] This invention improves the heat dissipation efficiency of cooling towers by enhancing the uniformity of water distribution and adaptability to varying flow rates, and also enables the cooling towers to adapt to different flow rates.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A variable flow nozzle, characterized in that: include: Variable flow float (1), nozzle fixing component (2), dual-channel nozzle body (3) and double-layer water distribution plate (4); The nozzle fixing component (2) is fixed in the water distribution plate, and the variable flow float (1) is coaxially arranged above the nozzle fixing component (2); the variable flow float (1) floats up and down according to the water surface of the water distribution plate, and is used to control the opening of the inner flow channel (7) and the outer flow channel in the dual-channel nozzle body (3); the dual-channel nozzle body (3) is fixed below the nozzle fixing component (2), and is used to change the direction and flow area of ​​the water flow; The dual-channel nozzle body (3) includes: an outwardly expanding spiral blade (6) and an inner flow channel (7); the inner flow channel (7) is an outwardly expanding curved surface from small to large, and the outer wall surface of the nozzle body (3) is also an outwardly expanding curved surface from small to large. An outer flow channel is formed between the inner flow channel (7) and the outer wall surface of the nozzle body (3). The outwardly expanding spiral blade (6) is located on the outside of the inner flow channel (7) and is a curved blade that passes through the outer flow channel. The flow surface of the outer flow channel decreases from large to small and is an outwardly expanding spiral shape. The outer flow channel changes the direction and flow area of ​​the water flow in advance, changing the water flow from a straight impact on the water distribution plate to an oblique impact. The double-layer water distribution plate (4) is set below the body of the double-channel nozzle (3) to control the diffusion of water flow; the double-layer water distribution plate (4) includes: an outer water distribution plate (10) and an inner water distribution plate (11); the outer water distribution plate (10) is fixedly set above the inner water distribution plate (11); the inner water distribution plate (11) includes: a medium-distance water distribution channel (12) and a short-distance water distribution channel (13). The inner water distribution plate (11) and the outer water distribution plate (10) rotate under the action of water flow. During the rotation of the inner water distribution plate (11), the water flow is dispersed. The water is thrown out in the groove of the medium-distance water distribution channel (12), and its water distribution diameter is larger than the water distribution diameter thrown out in the short-distance water distribution channel (13).

2. A variable flow nozzle according to claim 1, characterized in that: The dual-channel nozzle body (3) includes: a main body fixing end (5); one end of the main body fixing end (5) is connected to the nozzle fixing member (2), and the other end is connected to the inner channel (7), and the variable flow float (1) is disposed above the top opening of the inner channel (7).

3. A variable flow nozzle according to claim 2, characterized in that: The dual-channel nozzle body (3) also includes: a water distribution plate fixing rod (8); the water distribution plate (4) is connected through a round hole on the water distribution plate fixing rod (8).

4. A variable flow nozzle according to claim 1, characterized in that: The double-layer water distribution plate (4) includes: a water distribution plate fixing shaft (9); the water distribution plate fixing shaft (9) passes through and is fixed to the middle hole of the outer water distribution plate (10) and the inner water distribution plate (11) respectively and is connected to the inner flow channel (7).

5. A variable flow nozzle according to claim 3, characterized in that: The diameter of the middle hole of the outer layer water distribution plate (10) is smaller than the lower end diameter of the inner flow channel (7), larger than the upper end diameter of the inner flow channel (7), and equal to the diameter of the inner layer water distribution plate (11).

6. A variable flow nozzle according to claim 3, characterized in that: The outer water distribution plate (10) expands outward from small to large, and the water flow changes from a vertically downward axial flow direction to a radial flow that is close to parallel to the ground along the wall.

7. An adjustment method for adjusting a variable flow nozzle according to any one of claims 1-6, characterized in that: When the variable flow float (1) floats upward according to the water flow in the water distribution plate, it simultaneously opens the inner flow channel (7) and the outer flow channel of the double flow channel nozzle body (3). The water flows into the inner flow channel (7) and the outer flow channel respectively, driving the double-layer water distribution plate (4) to rotate for water distribution. When the variable flow float (1) floats downward according to the water flow in the water distribution plate, until the variable flow float (1) completely closes the flow area of ​​the inner flow channel (7), all the water flow is introduced into the outer flow channel, driving the double-layer water distribution plate (4) to rotate for water distribution; When the variable flow float (1) moves up and down according to the water flow in the water distribution plate, the variable flow float (1) adjusts the flow area of ​​the inner flow channel (7), thereby adjusting the flow rate of water entering the inner flow channel (7) and the outer flow channel, driving the double-layer water distribution plate (4) to rotate for water distribution.

8. A cooling tower comprising a variable flow nozzle according to any one of claims 1-6.

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