CN112611250B - Active flow field reconstruction air cooling tower - Google Patents
Active flow field reconstruction air cooling tower Download PDFInfo
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- CN112611250B CN112611250B CN202110044847.XA CN202110044847A CN112611250B CN 112611250 B CN112611250 B CN 112611250B CN 202110044847 A CN202110044847 A CN 202110044847A CN 112611250 B CN112611250 B CN 112611250B
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- back plate
- louver
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- air cooling
- flow field
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
- F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
- F28F2009/228—Oblique partitions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/10—Particular pattern of flow of the heat exchange media
- F28F2250/102—Particular pattern of flow of the heat exchange media with change of flow direction
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses an active flow field reconstruction air cooling tower, which comprises: a tower body; the radiator is positioned at the bottom of the tower body; the flow guide device is arranged on the outer side of the radiator; the guiding device comprises: the wind shield extends outwards from the radiator along the radial direction of the radiator; a back plate having a recess, the recess opening toward the heat sink, the wind shield portion being located in the recess; the cover plate is arranged above the wind shield and the back plate, two ends of the cover plate are respectively connected with the top of the back plate and the tower body, and the wind shield, the back plate and the cover plate enclose a flow guide channel; the back plate comprises a first louver, and blades of the first louver extend along the vertical direction; the control device is used for controlling the opening degree of the first louver; by applying the active flow field reconstruction air cooling tower, the adaptability of the flow field reconstruction device to different wind directions can be improved.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to an active flow field reconstruction air cooling tower.
Background
Air-cooled power generation, which is an efficient, water-saving and environment-friendly thermal power generation technology, has been rapidly developed in the world electric power construction in recent years, and is increasingly widely used particularly in countries and regions where water resources are relatively scarce. In addition, the indirect air cooling system in the air cooling technology is gradually accepted in the power industry due to the characteristics of noiselessness, long service life, simple maintenance, energy conservation and the like of the air cooling tower. The air cooling tower takes away heat by utilizing natural buoyancy movement generated by heating air through the surface type heat exchanger, so that the cooling efficiency of the air cooling tower is greatly influenced by environmental wind conditions, particularly transverse natural wind. The indirect air cooling unit of the indirect air cooling system is greatly influenced by natural environmental factors, particularly natural wind, during operation, so that the water temperature of circulating water greatly fluctuates. Therefore, if the indirect air cooling system is not improved and optimized, the backpressure fluctuation of the steam turbine is easily caused to be overlarge, the circulation efficiency of the indirect air cooling unit is greatly influenced, the indirect air cooling unit can not run at high load or full load in serious conditions, and the setting can cause the shutdown accident of the indirect air cooling unit.
Aiming at the problems, a better solution is to arrange at least one group of flow guide devices in the circumferential direction of the air cooling tower, and the flow guide devices are used for strengthening the air inlet effect of a radiator behind a wind shield and improving the ventilation characteristic of the air cooling tower; however, the position of the flow guide device is fixed, and when the wind direction is changed, the flow guide device cannot be arranged along with the change of the wind direction, so that the flow field reconstruction effect is limited; on the other hand, under low wind speed, the existing flow guiding device does not have the flow guiding effect, but can influence the heat dissipation effect of the air cooling tower.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an active flow field reconstruction air cooling tower which can improve the adaptability of a flow field reconstruction device to different wind directions.
The invention discloses an active flow field reconstruction air cooling tower, which comprises: a tower body; the radiator is positioned at the bottom of the tower body; the flow guide device is arranged on the outer side of the radiator; the guiding device comprises: the wind shield extends outwards from the radiator along the radial direction of the radiator; a back plate having a recess, the recess opening toward the heat sink, the wind shield portion being located in the recess; the cover plate is arranged above the wind shield and the back plate, two ends of the cover plate are respectively connected with the top of the back plate and the tower body, and the wind shield, the back plate and the cover plate enclose a flow guide channel; the back plate comprises a first louver, and blades of the first louver extend along the vertical direction; and the control device is used for controlling the opening of the first louver.
According to some embodiments of the invention, the cover plate comprises a second louver, the blades of which extend in a horizontal direction, the control device being capable of controlling the opening of the second louver.
According to some embodiments of the invention, the wind deflector is provided with a third louver whose blades extend in a vertical direction, the control device being able to adjust the opening of the third louver.
According to some embodiments of the invention, the width k of the blades of the third louver and the width M of the wind deflector satisfy k ≦ M.
According to some embodiments of the invention, the back plate comprises: an arcuate back plate segment; the two linear back plate sections are respectively connected to two ends of the arc-shaped back plate section, the linear back plate section is connected with the arc-shaped back plate section, and the linear back plate section is parallel to the wind shield; two top backplate sections, unsettled connection in apron below, two top backplate sections set up between linear type backplate section and radiator one-to-one.
According to some embodiments of the present invention, 0.1M ≦ R2 is satisfied between the radius R2 of the curved back panel segment and the width M of the windshield.
According to some embodiments of the invention, 0.5L5 ≦ n ≦ 5L5 is satisfied between the height n of the windshield and the height L5 of the radiator.
According to some embodiments of the invention, the height h of the cover plate and the height L5 of the radiator satisfy L5 ≦ h ≦ 5L 5.
According to some embodiments of the invention, 0.1M L2 10M +20R2 is satisfied between the total length L2 of the backplate, the width M of the windshield and the radius R2 of the curved backplate segment.
According to some embodiments of the invention, the height L4 of the top backplate section, the height h of the cover plate and the height n of the wind deflector satisfy 0.1(h-n) ≦ L4 ≦ h.
According to some embodiments of the present invention, the active flow field reconstruction air cooling tower further comprises a wind direction sensor, and the wind direction sensor is connected with the control device.
When the active flow field reconstruction air cooling tower is applied, when ambient wind forms accelerated airflow around the bottom side surface of the tower body and the side surface of the radiator, the wind shield blocks the accelerated airflow, so that a stagnant high-pressure area is formed on the windward side in front of the wind shield. Then, the accelerated air flow on the upper side and the outer side of the wind shield enters a labyrinth area behind the wind shield through a wind collecting port formed by the outer edge of the wind shield, the inner edge of the cover plate and the inner edge of the side plate, and turns to a radiator area behind the wind shield under the flow guidance of the leeward side of the wind shield and the side plate so as to strengthen the air inlet of the radiator behind the wind shield, avoid the water temperature of circulating water from greatly fluctuating, and prevent the backpressure of a steam turbine from greatly fluctuating; when the wind direction changes, can pass through controlling means, the aperture of blade in the middle of the control first louver for the air inlet side can both reach good air inlet effect to the wind of different wind directions, has effectively improved guiding device to the adaptability of different wind directions.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is an isometric view of an active flow field reconstruction air cooling tower in an embodiment of the present invention;
FIG. 2 is a front view of an active flow field reconstruction air cooling tower according to an embodiment of the present disclosure;
FIG. 3 is a top view of an active flow field reconstruction air cooling tower in an embodiment of the present invention;
FIG. 4 is an isometric view of a deflector device in an embodiment of the invention;
FIG. 5 is a front view of an embodiment of the deflector;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;
fig. 7 to 9 are schematic flow field reconstruction diagrams of the active flow field reconstruction air cooling tower according to the embodiment of the present invention;
the above figures contain the following reference numerals.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present numbers, and larger, smaller, inner, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 7, the active flow field reconstruction air cooling tower of the first aspect of the present embodiment includes: a tower body 110; a heat sink 120 located at the bottom of the tower body 110; a deflector 200 disposed outside the radiator 120; the deflector 200 includes: a wind shield 250 extending outward from the radiator 120 in a radial direction of the radiator 120; a back plate having a recess opening toward the heat sink 120, the wind shield 250 being partially located in the recess; the cover plate 260 is arranged above the wind shield 250 and the back plate, two ends of the cover plate 260 are respectively connected with the top of the back plate and the tower body 110, and the wind shield 250, the back plate and the cover plate 260 enclose a flow guide channel; the back plate comprises a first louver, and blades of the first louver extend along the vertical direction; and the control device is used for controlling the opening of the first louver.
By applying the active flow field reconstruction air cooling tower of the first aspect of the present embodiment, when ambient wind forms an accelerated airflow around the bottom side of the tower body and the side of the heat sink 120, the wind deflector 250 blocks the accelerated airflow, so that a stagnant high pressure region is formed in front of the wind deflector 250, i.e., the windward side of the wind deflector 250. Then, the accelerated air flow on the upper side and the outer side of the wind shield 250 enters a labyrinth area behind the wind shield 250 through a wind collecting port formed by the outer edge of the wind shield 250, the inner edge of the cover plate 260 and the inner edge of the side plate, and is guided by the leeward side of the wind shield 250 and the flow of the side plate to turn to the area of the radiator 120 behind the wind shield 250, so that the air inlet of the radiator 120 behind the wind shield 250 is strengthened, the water temperature of circulating water is prevented from greatly fluctuating, and the back pressure of a steam turbine is prevented from greatly fluctuating; when the wind direction changes, can pass through controlling means, the aperture of blade in the middle of the control first louver for the air inlet side can both reach good air inlet effect to the wind of different wind directions, has effectively improved guiding device 200 to the adaptability of different wind directions.
In the present embodiment, the related structure of the flow field reconstruction air cooling tower can refer to the prior application of the applicant, the application number of which is 202021248869.5.
As shown in fig. 7, the first louver is formed by stacking a plurality of blades, and the extending direction of the blades and the axial direction of the rotating shaft of the blades are vertical, i.e. the up-down direction shown in fig. 2, and the blades of the louver can be opened and closed.
It will be appreciated that the view of the schematic diagram shown in figure 7 corresponds to the view of figure 6.
In this embodiment, the control device can control the height of the first louver by various means, such as a PLC controller, a motor provided at each of the louvers, and the opening degree of the louver by the rotation angle of the motor; or the opening degree of each blade is controlled by controlling other power sources such as hydraulic or pneumatic power sources; in the present embodiment, the opening degree of the louver blade refers to the rotation angle of the blade.
In the present embodiment, the direction "outside" specifically refers to a direction from the center of the air cooling tower toward the outside of the air cooling tower.
It should be noted that in the present embodiment, the wind deflector 250 extends outward from the radiator 120 in the radial direction of the radiator 120, which means that not only the wind deflector 250 extends in the radial direction of the radiator 120, but also the wind deflector 250 forms an acute angle with the radial direction of the radiator 120 as shown in fig. 9.
As shown in fig. 4 to 6, the back plate includes: an arcuate back plate segment 220; two linear back plate sections 230 respectively connected to two ends of the curved back plate section 220, the linear back plate sections 230 are connected to the curved back plate section 220, and the angle between the linear back plate sections 230 and the wind deflector 250 is less than 30 degrees; two top back plate segments 240 suspended on the cover plate 260, wherein the two top back plate segments 240 are correspondingly arranged between the linear back plate segments 230 and the heat sink 120; the suspended part below the top back plate section 240 can play a role in air flow diffusion, so that the heat dissipation air after flow field reconstruction can uniformly enter the inside of the heat sink 120, and the heat dissipation effect is enhanced; the linear back plate segment 230 and the arc back plate segment 220 may be tangent or cut, as long as the linear back plate segment 230 and the arc back plate segment 220 are connected to each other, and the two linear back plate segments 230 may be flared or necked towards the heat sink 120, or may be arranged in parallel, as long as the respective included angles between the two linear back plate segments 230 and the wind shield 250 are less than 30 °.
As shown in fig. 2 to 6, in order to enhance the flow field reconstruction effect, there are some specific requirements for the specific size of the air cooling tower.
The radius R2 of the arc-shaped back plate section 220 and the width M of the wind deflector 250 meet the condition that R2 is more than or equal to 0.1M; at the moment, the flow field reconstruction channel with the bent effective stroke between the baffle and the back plate is more beneficial to the stroke of the high-pressure area, the flow field reconstruction effect is improved, and the problems that the pressure of the high-pressure area is too high and the air flow is blocked can be avoided.
On the other hand, the height h of the cover plate 260 and the height L5 of the radiator 120 satisfy that h is more than or equal to L5 and less than or equal to 5L 5; at this time, the baffle can prevent air that needs to be reconstructed but is not reconstructed from entering the heat sink 120, which affects the heat dissipation effect of the heat sink 120; meanwhile, the baffle can be prevented from being too high, and the installation is not convenient.
Specifically, the height n of the wind shield 250 and the height L5 of the radiator 120 satisfy 0.5L 5-5L 5; while the height n of the wind deflector 250 should be less than the height h of the cover plate 260.
As shown in FIGS. 5 and 6, the total length L2 of the backboard, the width M of the wind deflector 250 and the radius R2 of the arc backboard section 220 satisfy 0.1M & lt L2 & lt 10M +20R 2; the air flow around the radiator 120 can be fully guided, and meanwhile, the air flow after the flow field is reconstructed can enter the radiator 120, so that the air flow after reconstruction is prevented from being lost, and the reconstruction efficiency is reduced.
As shown in FIG. 5, the height L4 of the top back plate section 240, the height h of the cover plate 260 and the height n of the wind deflector 250 satisfy 0.1(h-n) L4 h; the situation that the airflow is difficult to blow into the radiator 120 due to excessive deceleration of the reconstructed airflow is prevented while the diffusion effect of the reconstructed airflow is ensured; at this time, the length L3 of the straight back plate segment 230 is L2-L1, where L1 is the length of the top back plate segment 240.
For better adaptation to wind direction and speed, the cover plate 260 comprises a second louver, the blades of which extend in a horizontal direction, and the control device is able to control the opening of the second louver.
In this embodiment, the flow guiding devices 200 may be arranged in multiple groups around the heat sink 120, each group including at least two flow guiding devices 200 symmetrical along the center of the heat sink 120, so as to improve the air intake condition at different positions of the heat sink 120; wherein, when only one set of the deflector 200 is provided, two deflectors 200 should be arranged perpendicular to the local summer maximum frequency wind direction.
In order to better adjust the opening of all the louvers, the active flow field reconstruction air cooling tower further comprises a wind direction sensor, and the wind direction sensor is connected with the control device; at the moment, the control device can detect the wind direction through the wind direction sensor to control the opening degree of the louver, of course, the control device can also be communicated with the Internet, the opening degree of the louver can be adjusted through real-time wind direction data of a meteorological website, and the cost of the built-in wind direction sensor is saved.
As shown in fig. 3 and fig. 6, in order to match the size of the heat sink 120 with the size of the airflow guiding device 200, the width R1 of the heat sink 120 and the radius R2 of the arc-shaped backboard section 220 satisfy 1.05R1 ≦ R2 ≦ 1.6R 1; wherein, the width R1 of the heat sink 120 refers to the distance between the inner circle and the outer circle of the heat sink 120; i.e., the width of the circular ring of the heat sink 120.
The active flow field reconstruction method in the second aspect of this embodiment includes the following steps: s100, detecting a field wind direction and a field wind speed; s200, controlling the opening of a first louver of the active flow field reconstruction air cooling tower according to the detected field wind direction and the detected field wind speed; the active flow field reconstruction air cooling tower is the active flow field reconstruction air cooling tower of the first aspect of this embodiment.
By applying the active flow field reconstruction method of the second aspect of this embodiment, when ambient wind forms an accelerated airflow around the bottom side of the tower body and the side of the heat sink 120, the wind deflector 250 blocks the accelerated airflow, so that a stagnant high-pressure region is formed in front of the wind deflector 250, i.e., the windward side of the wind deflector 250. Then, the accelerated air flow on the upper side and the outer side of the wind shield 250 enters a labyrinth area behind the wind shield 250 through a wind collecting port formed by the outer edge of the wind shield 250, the inner edge of the cover plate 260 and the inner edge of the side plate, and is guided by the leeward side of the wind shield 250 and the flow of the side plate to turn to the area of the radiator 120 behind the wind shield 250, so that the air inlet of the radiator 120 behind the wind shield 250 is strengthened, the water temperature of circulating water is prevented from greatly fluctuating, and the back pressure of a steam turbine is prevented from greatly fluctuating; when the wind direction changes, can pass through controlling means, the aperture of blade in the middle of the control first louver for the air inlet side can both reach good air inlet effect to the wind of different wind directions, has effectively improved guiding device 200 to the adaptability of different wind directions.
It will be appreciated that to further enhance the regulation of ventilation at low wind speeds, a third louver may be provided on the wind deflector 250, the structure of which may be referred to the first louver, i.e. the blades of the third louver also extend in the vertical direction; in order to ensure the flow guiding effect of the third louver, the width k of the blades of the third louver and the width M of the wind shield 250 satisfy that k is less than or equal to M.
As shown in fig. 8, when the wind direction is inclined, the first louver and the third louver are opened, so that a better ventilation effect can be achieved.
In order to better adapt to different wind speeds and wind directions, the cover plate 260 comprises a second louver, blades of the second louver extend along the horizontal direction, and the control device can control the opening degree of the second louver.
Specifically, in S200, a plurality of control schemes are included as follows.
In step S200, when the field wind speed is less than or equal to the predetermined value, controlling the second louver to open, and controlling the first louver to open; at this time, the wind speed is low, and the flow guide device 200 is difficult to achieve the wind gathering effect, so that the first louver and the second louver are completely opened, and the wind inlet area is the largest; specifically, in order to achieve the maximum air inlet effect, the first louver and the second louver can be fully opened, and the opening degree can also be flexibly controlled according to the wind speed; at this time, the third louver is closed.
On the other hand, in step S200, when the field wind speed is greater than the predetermined value, the second louver is controlled to be closed, and the first louver is controlled to be opened; at the moment, the wind speed is high, the flow guide device 200 can play a good wind gathering effect to reconstruct a flow field; therefore, the second louver is controlled to be closed, and the first louver is controlled to be opened, so that the airflow is blown out after the flow field is reconstructed along the flow field channel surrounded by the baffle, the cover plate 260 and the back plate after a high-pressure area is formed in front of the baffle; at this time, the opening degree of the third louver can be properly adjusted according to the requirement to enhance the ventilation effect, and the opening degree of the third louver is preferably parallel to the wind direction.
Specifically, in step S200, when the field wind speed is greater than a predetermined value, controlling the opening of the first louver such that the orientation of the blades of the first louver is parallel to the wind direction; at the moment, the wind resistance of the first louver is the minimum, and the air inlet effect is the best.
More specifically, in step S200, when the field wind speed is greater than the predetermined value, the first louvers are controlled such that the orientation of the blades on the windward side among the first louvers is parallel to the wind direction, and the blades on the leeward side among the first louvers are closed; at the moment, after the louver on the windward side is opened, air enters the passage in the blade enclosure of the closed first louver, and then flow field reforming can be carried out, so that the air inlet effect is ensured, and the situation that the flow field reforming passage is incomplete due to full opening of the blades and the flow field reforming passage is influenced is effectively prevented.
Specifically, the blades on the windward side and the leeward side can be distinguished in the following way: when the wind direction is detected, a tangent line of the arc-shaped back plate section 220 is made along the direction parallel to the wind direction, the blade at the windward part at one side of the tangent point is the blade at the windward side, and the blade at the other side of the tangent point is the blade at the leeward side.
Here, the value of the predetermined value can be flexibly adjusted according to the condition of the heat sink 120, and the value range is 3.5m/s to 4.5m/s, preferably 4 m/s.
In this embodiment, the opening of the vane is greater than 0, the full opening of the vane is the maximum opening of the vane, and the closing of the vane is 0.
Here, the wind direction and the wind speed can be communicated with the internet through the control device to acquire the actual wind speed and the wind direction data of a meteorological website, and a wind direction sensor and a wind speed sensor can be arranged in the active flow field reconstruction air cooling tower, so that the wind direction and the wind speed can be better adapted to the field wind speed and the wind direction.
Finally, in order to verify the actual effects of the active flow field reconstruction air cooling tower and the active flow field reconstruction method, the following experimental scheme is adopted: in a 600MW indirect air cooling unit, the diameter of the outer side of an air cooling tower radiator 120 is 152m, the height L5 of the air cooling tower radiator 120 is 27.5m, and the height of the air cooling tower is 170 m. Two labyrinth type guiding devices 200 are symmetrically arranged perpendicular to the summer main frequency wind direction, the height n of the wind shield 250 is equal to the height L5 of the air cooling tower radiator 120, and the width m takes the value of 20 m. The U-shaped back plate has a height h of 27.5m, R2 of 20m, L1 of 5m and L2 of 45 m. Tests prove that in the wind speed range of 0-10m/s, the overall ventilation of the flow field reconstruction system is improved by 10-30% compared with the ventilation before modification, the overall ventilation is improved by 30-50% compared with the ventilation before modification in the wind speed range of 10-20m/s, the ventilation is improved by 10-20% compared with the windless working condition before modification under the condition of strong wind, namely the wind speed range of 10-20m/s, the negative influence of ambient wind on the cooling performance of the air cooling tower is turned into positive influence, and the average reduction of coal consumption by 5g/kWh can be realized in the wind speed range of 0-20 m/s.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. An active flow field reconstruction air cooling tower, comprising:
a tower body (110);
a radiator (120) located at the bottom of the tower body (110);
a deflector (200) disposed outside the heat sink (120); the flow guiding devices (200) at least form a group of flow guiding groups, and two flow guiding devices (200) in the same flow guiding group are symmetrical along the center of the radiator (120);
the flow guiding device (200) comprises:
a wind deflector (250) extending outward from the radiator (120) in a radial direction of the radiator (120);
a back plate having a recess opening toward the heat sink (120), the wind deflector (250) being partially located in the recess;
the cover plate (260) is arranged above the wind deflector (250) and the back plate, two ends of the cover plate (260) are respectively connected with the top of the back plate and the tower body (110), and a flow guide channel is enclosed by the wind deflector (250), the back plate and the cover plate (260);
The back plate comprises a first louver, and blades of the first louver extend along the vertical direction;
control means for controlling the opening of the first louver;
the wind direction sensor is connected with the control device;
wherein the cover plate (260) comprises a second louver, the blades of which extend in a horizontal direction, the control device being able to control the opening of the second louver;
the wind shield (250) is provided with a third louver, blades of the third louver extend in the vertical direction, and the control device can adjust the opening degree of the third louver.
2. The active flow field reconstruction air cooling tower of claim 1, wherein a width k of the third louver blade and a width M of the wind shield (250) satisfy k ≦ M.
3. The active flow field reconstruction air cooling tower of claim 1, wherein the back plate comprises: an arcuate back plate segment (220);
the two linear back plate sections (230) are respectively connected to two ends of the arc-shaped back plate section (220), the linear back plate sections are connected with the arc-shaped back plate section (220), and an included angle between each linear back plate section (230) and the wind shield (250) is smaller than 30 degrees;
The two top backboard sections (240) are connected below the cover plate (260) in a hanging mode, and the two top backboard sections (240) are arranged between the linear backboard section (230) and the radiator (120) in a one-to-one correspondence mode.
4. The active flow field reconstruction air cooling tower of claim 3, wherein a radius R2 of the curved back plate segment (220) and a width M of the wind deflector (250) satisfy 0.1M ≦ R2.
5. The active flow field reconstruction air cooling tower of claim 3, wherein a height n of the wind shield (250) and a height L5 of the heat sink (120) satisfy 0.5L5 ≤ n ≤ 5L 5.
6. The active flow field reconstruction air cooling tower of claim 3, wherein a height h of the cover plate (260) and a height L5 of the heat sink (120) satisfy L5 ≤ h ≤ 5L 5.
7. The active flow field reconstruction air cooling tower of claim 3, wherein a total length L2 of the back plate, a width M of the wind deflector (250), and a radius R2 of the arc-shaped back plate section (220) satisfy 0.1M ≦ L2 ≦ 10M +20R 2.
8. The active flow field reconstruction air cooling tower of claim 3 or 7, wherein a height L4 of the top back plate section (240), a height h of the cover plate (260) and a height n of the wind deflector (250) satisfy 0.1(h-n) ≦ L4 ≦ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110044847.XA CN112611250B (en) | 2021-01-13 | 2021-01-13 | Active flow field reconstruction air cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110044847.XA CN112611250B (en) | 2021-01-13 | 2021-01-13 | Active flow field reconstruction air cooling tower |
Publications (2)
| Publication Number | Publication Date |
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| CN112611250A CN112611250A (en) | 2021-04-06 |
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| CN113670087B (en) * | 2021-09-06 | 2024-04-26 | 神华国能宁夏鸳鸯湖发电有限公司 | Partial pressure anti-freezing device and method for indirect air cooling tower |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07305996A (en) * | 1994-05-11 | 1995-11-21 | Kuken Kogyo Kk | Heat exchanger for closed type wet cooling tower |
| CN1865825A (en) * | 2006-05-13 | 2006-11-22 | 山西鑫海源工贸有限公司 | Three-phase fluidized turbulent ball cooling tower |
| CN204555241U (en) * | 2015-02-13 | 2015-08-12 | 广东美的制冷设备有限公司 | Shutter mechanism and there is its exhaust apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2398277A1 (en) * | 1977-07-22 | 1979-02-16 | Renault | METHOD AND DEVICE FOR CORRECTION OF DRAFT IN COOLING TOWERS, ESPECIALLY WITH NATURAL DRAFT |
| CN105202938A (en) * | 2015-09-07 | 2015-12-30 | 中国矿业大学 | Novel air cooling tower |
| CN205448744U (en) * | 2016-02-26 | 2016-08-10 | 清华大学 | Crosswind recovery type air cooling tower |
| CN111578736A (en) * | 2020-05-18 | 2020-08-25 | 中国电力工程顾问集团西北电力设计院有限公司 | Heat absorption tower with natural ventilation cooling function |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07305996A (en) * | 1994-05-11 | 1995-11-21 | Kuken Kogyo Kk | Heat exchanger for closed type wet cooling tower |
| CN1865825A (en) * | 2006-05-13 | 2006-11-22 | 山西鑫海源工贸有限公司 | Three-phase fluidized turbulent ball cooling tower |
| CN204555241U (en) * | 2015-02-13 | 2015-08-12 | 广东美的制冷设备有限公司 | Shutter mechanism and there is its exhaust apparatus |
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