Indirect evaporative cooling core of a hybrid wet-dry cooling tower
Patent Information
- Application Number
- CN202421559483.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2034-07-03
AI Technical Summary
[0004]本实用新型为了解决相关技术中的问题，提供了一种间接蒸发冷却芯体的干湿联合冷却塔，该装置解决了干湿联合冷却塔的使用寿命短的问题
[0015]1、由于本实用新型的一种间接蒸发冷却芯体的干湿联合冷却塔包括塔体，塔体外侧壁自下而上设置有第一风阀和第二风阀，塔体底部设置有集水盘，集水盘上部设置有冷却芯体，冷却芯体呈倾斜布置，塔体顶部临近边缘处设置有第三风阀，第三风阀下方设置有换热器，换热器与第三风阀之间设置有喷淋布水管，集水盘一侧设置有喷淋水泵，喷淋水泵的出水口与喷淋布水管相连通，塔体顶端中部设置有出风口，出风口上设有风机。高温高湿环境下，第一风阀、第二风阀和第三风阀全部打开，气流将会从第一风阀、第二风阀和第三风阀进入设备，整体设备有两处蒸发段；稍低一些气温时设备运行，打开第一风阀和第二风阀，关闭第三风阀，减少1个蒸发段，通过提高显热比实现设备的进一步节水；极端节水时设备运行，打开第一风阀，关闭第二风阀和第三风阀，全塔的空气从第一风阀进入，最后由设备顶部的风扇排放至环境中，三种模式下，均不会对设备造成损坏，大大延长了干湿联合冷却塔的使用寿命。
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Figure CN224920988U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cooling tower technology, specifically a dry-wet combined cooling tower with an indirect evaporative cooling core. Background Technology
[0002] Cooling towers, as a highly efficient cold source, are widely used in data center computer room heat dissipation, industrial and chemical fields. Their working principle is to remove the heat from the system through the evaporation of water and the latent heat exchange of phase change. Therefore, in high temperature and high humidity environments, cooling towers will generate a lot of evaporation losses. However, my country's environment is characterized by large temperature differences between day and night and between seasons. When operating cooling towers in low temperature environments, the evaporation loss of equipment can be reduced due to the increase in the sensible heat transfer ratio.
[0003] Currently, the mainstream equipment using this solution is a combined wet and dry cooling tower with finned tubes. The fins of this equipment are connected in series with the heat exchanger in the wet cooling section. When the ambient temperature is high, hot water is first introduced into the finned tube section for pre-cooling. The pre-cooled hot water then enters the wet cooling heat exchanger for heat dissipation. Nozzles installed on the wet cooling heat exchanger evenly distribute the spray water above the heat exchanger. The low-temperature air passing below continuously evaporates the spray water and removes heat. Subsequently, the heated humid air will also pass through the finned tubes. When the ambient temperature is low, the system shuts off the spray and operates in a pure dry state. Heat transfer is achieved by utilizing the high heat transfer coefficient between the finned tubes and the air, as well as the large logarithmic heat transfer temperature difference between the tube bundle and the air. However, this process is obviously detrimental to the finned tubes. The fin pitch of the finned tubes is small, and dust carried by the humid air can easily accumulate on the surface of the finned tubes, causing corrosion and breakage, which seriously affects the service life of the combined wet and dry cooling tower. Utility Model Content
[0004] In order to solve the problems in related technologies, this utility model provides a dry-wet combined cooling tower with an indirect evaporative cooling core, which solves the problem of short service life of dry-wet combined cooling towers.
[0005] To solve the above problems, the following technical solutions are provided:
[0006] This utility model discloses a dry-wet combined cooling tower with an indirect evaporative cooling core, comprising a tower body. A first air valve and a second air valve are arranged from bottom to top on the outer wall of the tower body. A water collection tray is provided at the bottom of the tower body, and a cooling core is arranged at the top of the water collection tray, with the cooling core being inclined. A third air valve is provided near the edge of the top of the tower body, and a heat exchanger is provided below the third air valve. A spray cloth water pipe is provided between the heat exchanger and the third air valve. A spray water pump is provided on one side of the water collection tray, and the outlet of the spray water pump is connected to the spray cloth water pipe. An air outlet is provided at the middle of the top of the tower body, and a fan is provided on the air outlet.
[0007] In the above scheme, the first, second, and third air valves are all open, and airflow will enter the equipment through the first, second, and third air valves. The overall equipment has two evaporation sections. When the temperature is slightly lower, the equipment operates by opening the first and second air valves and closing the third air valve, reducing one evaporation section and achieving further water saving by increasing the sensible heat ratio. When the equipment operates under extreme water-saving conditions, the first air valve is opened and the second and third air valves are closed. All the air in the tower enters through the first air valve and is finally discharged into the environment by the fan at the top of the equipment. In all three modes, the equipment will not be damaged, thus solving the problem of short service life of dry and wet combined cooling towers.
[0008] The lower edge of the cooling core abuts against the cover plate of the water collection tray, one side of the cooling core abuts against the inner wall of the tower, and the rear end face of the cooling core abuts against the rear wall of the tower, forming a heat exchange chamber; the cooling core, the bottom of the heat exchanger, and the second air valve enclose an evaporation chamber.
[0009] In the above scheme, the evaporation chamber allows for full contact and heat exchange with the air, and the water temperature is reduced by utilizing the heat absorption effect of water evaporation.
[0010] The dry air enters the cooling core from bottom to top, while the humid air enters from top to bottom. The dry air enters the cooling core through the first medium inlet surface and exits from the first medium outlet surface. The heat exchange chamber and the upper cavity of the cooling core are connected. The humid air enters the cooling core through the second medium inlet surface and exits from the second medium outlet surface. The evaporation chamber and the lower cavity of the cooling core are connected. The first medium inlet surface and the second medium inlet surface are not connected.
[0011] In the above scheme, the cooling core is designed so that dry air and humid air do not come into contact during the cooling process.
[0012] A first water collector is provided on the lower side of the cooling core, and a second water collector is provided on the side of the heat exchanger away from the inner wall of the tower. The cooling tower adopts a symmetrical structure.
[0013] The above solution effectively prevents water loss by setting up a first water collector and a second water collector.
[0014] The above solution has the following advantages:
[0015] 1. The present invention relates to a dry-wet combined cooling tower with an indirect evaporative cooling core, comprising a tower body, a first air valve and a second air valve arranged from bottom to top on the outer wall of the tower body, a water collection tray at the bottom of the tower body, a cooling core arranged at the top of the water collection tray, a third air valve near the edge of the top of the tower body, a heat exchanger below the third air valve, a spray cloth water pipe between the heat exchanger and the third air valve, a spray water pump on one side of the water collection tray, the outlet of the spray water pump being connected to the spray cloth water pipe, an air outlet at the middle of the top of the tower body, and a fan on the air outlet. In high-temperature and high-humidity environments, all three air valves (first, second, and third) are open, allowing airflow to enter the equipment through them. The entire system has two evaporation sections. When the temperature is slightly lower, the equipment operates by opening the first and second air valves and closing the third air valve, reducing one evaporation section and further saving water by increasing the sensible heat ratio. In extreme water-saving mode, the equipment operates by opening the first air valve and closing the second and third air valves, allowing all air in the tower to enter through the first air valve and finally being discharged into the environment by the fan at the top of the equipment. In all three modes, the equipment remains undamaged, significantly extending the service life of the combined dry and wet cooling tower.
[0016] 2. The lower edge of the cooling core abuts against the cover plate of the water collection tray, one side of the cooling core abuts against the inner wall of the tower, and the rear end face of the cooling core abuts against the rear wall of the tower, forming a heat exchange chamber. The cooling core, the bottom of the heat exchanger, and the second air valve enclose the evaporation chamber. Through the setting of the evaporation chamber, it can fully contact and exchange heat with the air. Utilizing the heat absorption effect of water evaporation, the water temperature is reduced. Dry air enters from the bottom and exits from the top through the cooling core, while humid air enters from the top and exits from the bottom through the cooling core. The setting of the cooling core ensures that dry air and humid air do not come into contact during the cooling process. A first water collector is set on the lower side of the cooling core, and a second water collector is set on the side of the heat exchanger away from the inner wall of the tower, effectively preventing water loss. Attached Figure Description
[0017] Fig. 1 A schematic diagram of a combined dry and wet cooling tower with an indirect evaporative cooling core;
[0018] Fig. 2 A schematic diagram of airflow in a dry-wet combined cooling tower with an indirect evaporative cooling core operating in a high-temperature and high-humidity environment;
[0019] Fig. 3 This is a schematic diagram of the airflow in a combined wet and dry cooling tower with an indirect evaporative cooling core, operating at a slightly lower temperature.
[0020] Fig. 4 A schematic diagram of airflow in a combined wet and dry cooling tower with an indirect evaporative cooling core operating under extreme water-saving conditions;
[0021] Fig. 5 A schematic diagram of a dry-wet combined cooling core for an indirect evaporative cooling core;
[0022] Explanation of reference numerals in the attached drawings: 1. First air valve; 2. Second air valve; 3. Water collection tray; 4. Cooling core; 5. Third air valve; 6. Heat exchanger; 7. Spray water pipe; 8. Spray water pump; 9. Fan; 10. First water collector; 11. Second water collector. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] like Figs. 1-5 As shown, the present invention discloses a combined dry and wet cooling tower with an indirect evaporative cooling core 4, comprising a tower body. A first air valve 1 and a second air valve 2 are arranged from bottom to top on the outer wall of the tower body. A water collection tray 3 is arranged at the bottom of the tower body, and a cooling core 4 is arranged on the upper part of the water collection tray 3, with the cooling core 4 arranged at an incline. A third air valve 5 is arranged near the edge of the top of the tower body, and a heat exchanger 6 is arranged below the third air valve 5. A spray cloth water pipe 7 is arranged between the heat exchanger 6 and the third air valve 5. A spray water pump 8 is arranged on one side of the water collection tray 3, and the outlet of the spray water pump 8 is connected to the spray cloth water pipe 7. An air outlet is arranged in the middle of the top of the tower body, and a fan is mounted on the air outlet. Machine 9, the cooling tower adopts a symmetrical structure. Under high temperature and high humidity conditions, the first air valve 1, the second air valve 2, and the third air valve 5 are all opened, and the airflow will enter the equipment through the first air valve 1, the second air valve 2, and the third air valve 5. The whole equipment has two evaporation sections. When the temperature is slightly lower, the equipment operates by opening the first air valve 1 and the second air valve 2 and closing the third air valve 5, reducing one evaporation section and achieving further water saving by increasing the sensible heat ratio. When the equipment operates under extreme water saving conditions, the first air valve 1 is opened and the second air valve 2 and the third air valve 5 are closed. All the air in the tower enters through the first air valve 1 and is finally discharged into the environment by the fan at the top of the equipment.
[0025] The lower edge of the cooling core 4 abuts against the cover plate of the water collection tray 3, one side of the cooling core 4 abuts against the inner wall of the tower, and the rear end face of the cooling core 4 abuts against the rear wall of the tower, forming a heat exchange chamber; the cooling core 4, the bottom of the heat exchanger 6, and the second air valve 2 enclose an evaporation chamber.
[0026] Dry air enters the cooling core 4 from the bottom and exits from the top, while humid air enters the cooling core 4 from the top and exits from the bottom. Dry air enters the cooling core 4 through the first medium inlet surface and exits from the first medium outlet surface. The heat exchange chamber and the upper cavity of the cooling core 4 are connected. Humid air enters the cooling core 4 through the second medium inlet surface and exits from the second medium outlet surface. The evaporation chamber and the lower cavity of the cooling core 4 are connected. The first medium inlet surface and the second medium inlet surface are not connected.
[0027] A first water collector 10 is provided on the lower side of the cooling core 4, and a second water collector 11 is provided on the side of the heat exchanger 6 away from the inner wall of the tower.
[0028] Operation process of a combined dry and wet cooling tower under high temperature and high humidity conditions:
[0029] Open the first air valve 1, the second air valve 2, and the third air valve 5, and turn on the spray water pump 8. The airflow entering the equipment through the first air valve 1 undergoes indirect heat exchange in the heat exchange chamber. The air after heat exchange enters the cooling core 4 from the first medium inlet surface and flows out from the first medium outlet surface. The air leaving the cooling core 4 is dry air. The airflow entering the equipment through the second air valve 2 evaporates the spray water leaving the heat exchanger 6 in the evaporation chamber. It flows into the cooling core 4 from the second medium inlet surface and flows out from the second medium outlet surface. The air flowing out is humid and hot air. The airflow entering the heat exchanger 6 from the top through the third air valve 5 evaporates the spray water in the heat exchanger 6. The air leaving the side of the heat exchanger 6 away from the tower body is humid air. The entire equipment has two evaporation sections.
[0030] The operation process of a combined dry and wet cooling tower at slightly lower temperatures:
[0031] Open the first air valve 1 and the third air valve 5, turn on the spray water pump 8, and close the second air valve 2. The airflow entering the equipment from the first air valve 1 undergoes indirect heat exchange in the heat exchange chamber. The air after heat exchange enters the cooling core 4 from the first medium inlet surface and flows out from the first medium outlet surface. The airflow from the third air valve 5 enters the heat exchanger 6 from above and evaporates the spray water in the heat exchanger 6, reducing one evaporation section and achieving further water saving of the equipment by increasing the sensible heat ratio.
[0032] The operation process of a combined dry and wet cooling tower under extreme water-saving conditions:
[0033] Open the first air valve 1, turn on the spray water pump 8, and close the second air valve 2 and the third air valve 5. At this time, the water evaporation loss of the dry and wet combined cooling tower is zero. All the air in the tower enters through the first air valve 1. The spray water carries the heat of the heat exchanger 6 itself and transfers it to the air through the indirect heat transfer method inside the cooling core 4. Finally, it is discharged into the environment by the fan 9 at the top of the equipment.
[0034] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components, and can be direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A combined dry and wet cooling tower with an indirect evaporative cooling core, characterized in that, The tower body includes a first air valve (1) and a second air valve (2) arranged from bottom to top on the outer wall of the tower body. A water collection tray (3) is arranged at the bottom of the tower body. A cooling core (4) is arranged on the upper part of the water collection tray (3). The cooling core (4) is arranged at an incline. A third air valve (5) is arranged near the edge of the top of the tower body. A heat exchanger (6) is arranged below the third air valve (5). A spray cloth water pipe (7) is arranged between the heat exchanger (6) and the third air valve (5). A spray water pump (8) is arranged on one side of the water collection tray (3). The outlet of the spray water pump (8) is connected to the spray cloth water pipe (7). An air outlet is arranged in the middle of the top of the tower body. A fan (9) is arranged on the air outlet.
2. A combined dry and wet cooling tower with an indirect evaporative cooling core as described in claim 1, characterized in that, The lower side of the cooling core (4) abuts against the cover plate of the water collection tray (3), one side of the cooling core (4) abuts against the inner wall of the tower body, and the rear end face of the cooling core (4) abuts against the rear wall of the tower body, forming a heat exchange chamber; the cooling core (4), the bottom of the heat exchanger (6), and the second air valve (2) form an evaporation chamber.
3. A combined dry and wet cooling tower with an indirect evaporative cooling core as described in claim 2, characterized in that, Dry air enters from the bottom and exits from the top through the cooling core (4), while humid air enters from the top and exits from the bottom through the cooling core (4). Dry air enters the cooling core (4) through the first medium inlet surface and flows out from the first medium outlet surface. The heat exchange chamber and the upper cavity of the cooling core (4) are connected. The humid air enters the cooling core (4) through the second medium inlet surface and flows out from the second medium outlet surface. The evaporation chamber and the lower cavity of the cooling core (4) are connected. The first medium inlet surface and the second medium inlet surface are not connected.
4. A combined dry and wet cooling tower with an indirect evaporative cooling core as described in claim 3, characterized in that, A first water collector (10) is provided on the lower side of the cooling core (4), and a second water collector (11) is provided on the side of the heat exchanger (6) away from the inner wall of the tower.
5. A combined dry and wet cooling tower with an indirect evaporative cooling core as described in claim 1, characterized in that, The cooling tower adopts a symmetrical structure.