16mw double-fed air-water cooler

Abstract

The utility model relates to a 16MW double-fed air-water cooler, and the cooler box body is erected on a wind turbine cabin, left and right return air inlets corresponding to the wind turbine cabin are formed on the left and right sides of the bottom of the cooling box body, an air inlet corresponding to the wind turbine cabin is formed in the middle of the bottom of the cooling box body, more than one circulating fan is arranged on the left and right sides of the cooling box body, more than three spiral cyclone blades are installed on the air inlet, left and right water-cooled coolers are arranged in the cooling box body between the air inlet and the left and right return air inlets, the left and right water-cooled coolers are opposite L-shaped plate-fin heat exchangers, the uppermost section of the vertical edge of the L-shaped plate-fin heat exchanger is connected with a water inlet, and the horizontal edges of the two L-shaped plate-fin heat exchangers are connected with water outlets above the air inlet and close to the middle end positions. The structure is compact, the overall heat exchange performance is stable, the efficiency is consistent, the heat exchange water utilization rate is high, and the energy consumption is low.

Description

Technical Field

[0001] This utility model relates to a cooler, specifically a 16MW doubly-fed air-water cooler. Background Technology

[0002] Coolers have a wide range of applications, including ships, wind power generation, high-voltage power plants, steel mills, and oil fields. Depending on the specific application environment of the motor, the required type of cooler varies, such as air-to-air coolers, air-to-water coolers, direct-cooling coolers, and cooling fans. For existing high-power offshore wind turbines, the cooling effect of the onboard cooler directly affects the generator's lifespan. If the cooling performance does not meet expectations, the heat generated by the generator cannot be dissipated in time, resulting in excessively high operating temperatures and potential damage to components. For example, in the applicant's prior patent 202322916318.1, only one air outlet and one return air outlet are provided. If the air outlet corresponds to one side of the wind turbine nacelle and the return air outlet corresponds to the other side, the cooling effect is generally poor and the cooling timeliness is poor when the temperature in the middle of the generator nacelle is high. In the applicant's prior patent 202221537666.7, since all core components such as gearbox, generator, frequency converter and other high-heat-generating components are concentrated in the middle of the generator nacelle, the heat generation of each component is inconsistent. The temperature of the hot air drawn from the middle varies in different directions. The airflow in different directions will flow along the initial path, forming a "layered zone" or "opposition blind zone", which will be sent to the heat exchangers on both sides respectively. The heat exchange performance is unstable and the efficiency is uncontrollable. There is a problem of wasted water cooling energy consumption on the side with lower temperature. In addition, since the hot air is drawn and the heat exchanger heats up quickly, the heat exchange time is relatively short and the utilization rate of water cooling capacity is low. Summary of the Invention

[0003] This invention provides a 16MW doubly-fed air-water cooler with a compact structure that can achieve stable overall heat exchange performance, consistent efficiency, high utilization rate of heat exchange water supply, and low energy consumption.

[0004] The technical solution adopted by this utility model is as follows: a 16MW doubly-fed air-water cooler, including a cooling box, which is mounted on the wind turbine nacelle. The left and right return air inlets corresponding to the ventilation motor nacelle are opened on the left and right sides of the bottom of the cooling box, and the air inlet corresponding to the ventilation motor nacelle is opened in the middle of the bottom of the cooling box. One or more circulating fans are set on both the left and right sides of the cooling box. The feature is that: three or more spiral swirl blades are installed on the air inlet. Left and right water-cooled coolers are set in the cooling box between the air inlet and the left and right return air inlets, respectively. The left and right water-cooled coolers are L-shaped plate-fin heat exchangers. The uppermost section of the vertical side of the L-shaped plate-fin heat exchanger is connected to the water inlet, and the horizontal side of the two L-shaped plate-fin heat exchangers is connected to the water outlet near the middle end above the air inlet.

[0005] A 16MW doubly-fed air-water cooler includes a cooling box mounted on a wind turbine nacelle. Left and right return air inlets, corresponding to the ventilation turbine nacelle, are located on the left and right sides of the bottom of the cooling box. An air inlet, also corresponding to the ventilation turbine nacelle, is located in the middle of the bottom of the cooling box. One or more circulating fans are installed on both the left and right sides of the cooling box. The cooler is characterized by: a grille or a relatively upward-facing air duct installed on the air inlet; left and right water-cooled coolers, each L-shaped plate-fin heat exchanger, are installed within the cooling box between the air inlet and the left and right return air inlets. The left and right water-cooled coolers are L-shaped plate-fin heat exchangers. The uppermost section of the vertical side of each L-shaped plate-fin heat exchanger is connected to a water inlet, and the horizontal side of each L-shaped plate-fin heat exchanger is connected to a water outlet near the middle end above the air inlet.

[0006] The inlets of the two L-shaped plate-fin heat exchangers are connected to the water supply pipe via a branch manifold.

[0007] The cooling box is also equipped with a water collection tray that is staggered with the left and right return air inlets and air inlets.

[0008] The water collection pan is equipped with a liquid level sensor, which is connected to the circulating fan via a controller.

[0009] Temperature sensors and flow sensors are installed on the left and right return air vents.

[0010] The beneficial effects of this utility model are: 1. Installing spiral swirl blades, grilles, or air ducts on the air inlet can divert or turbulently mix hot air of different temperatures in different directions in the middle of the generator compartment, which facilitates stable heat exchange in the subsequent heat exchangers on both sides, ensuring stable and controllable cooling performance and energy consumption.

[0011] 2. The heat exchanger is configured as an L-shaped plate-fin heat exchanger, with the horizontal side positioned above the air inlet and connected to the water outlet. Cooling water supplied from the vertical side first exchanges heat with the hot air. After the heat exchange and temperature increase, the cooling water pre-cools the hot air supplied from the air inlet within the horizontal side, which helps improve the utilization rate of the cooling water, reduce energy consumption, and further improve cooling performance. The water inlet on the vertical side is connected using a split manifold to ensure stable performance of the coolers on both sides, which is beneficial for improving cooling performance and controlling energy consumption.

[0012] 3. The water collection tray can effectively prevent condensate from falling into the generator compartment from the air inlet and return air outlet, affecting safe operation. It also controls the fan to stop operation through liquid level sensing devices, such as float balls and liquid level gauges, to prevent condensate from overflowing from the water collection tray. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1. Generator compartment; 2. Cooling box; 3. Left return air inlet; 4. Right return air inlet; 5. Air inlet; 6. Spiral swirl vane; 7. Circulating fan; 8. Left water-cooled cooler; 9. Vertical side; 10. Water inlet; 11. Diversion manifold; 12. Horizontal side; 13. Water outlet; 14. Right water-cooled cooler. Detailed Implementation

[0015] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0016] Figure 1 As shown: A 16MW doubly fed air-water cooler includes a cooling box 2, spiral swirl blades 6, a circulating fan 7, a left water-cooled cooler 8, a branch manifold 11, and a right water-cooled cooler 14. The cooling box 2 is mounted on the wind turbine nacelle 1. One or more circulating fans 7 are installed on both the left and right sides of the cooling box 2. The left and right return air inlets 3 and 4, respectively, are opened on the left and right sides of the bottom of the cooling box 2, corresponding to the ventilation motor nacelle 1. The air inlet 5, corresponding to the ventilation motor nacelle 1, is opened in the middle of the bottom of the cooling box 2. Three or more spiral swirl blades 6 are installed on the air inlet 5. Left and right water-cooled coolers 8 and 14 are installed in the cooling box between the air inlet and the left and right return air inlets, respectively. The left and right water-cooled coolers are L-shaped plate-fin heat exchangers. The uppermost section of the vertical side 9 of the two L-shaped plate-fin heat exchangers is connected to the water inlet 10. The water inlets of the two L-shaped plate-fin heat exchangers are connected by the water supply pipe through the diversion manifold 11. The horizontal side 12 of the two L-shaped plate-fin heat exchangers is connected to the water outlet 13 at the end near the middle of the air inlet.

[0017] Based on this embodiment, a water collection tray can also be installed inside the cooling box, staggered from the left and right return air inlets and air inlets. The water collection tray contains a liquid level sensor, which is connected to the circulating fan via a controller. Water collection tray technology is a conventional technology in the field of air-cooled coolers.

[0018] Building upon this embodiment, temperature and flow sensors can also be installed on the left and right return air vents for precise control. This sensing and monitoring technology is a conventional technology.

Claims

1. A 16MW doubly-fed air-water cooler, comprising a cooling box mounted on a wind turbine nacelle, with left and right return air inlets corresponding to the wind turbine nacelle on the left and right sides of the bottom of the cooling box, and an air inlet corresponding to the wind turbine nacelle on the center of the bottom of the cooling box, and one or more circulating fans on both the left and right sides of the cooling box, characterized in that: The air inlet is equipped with three or more spiral swirl blades. The air inlet and the left and right return air inlets are respectively connected to the cooling box, which is equipped with left and right water-cooled coolers. The left and right water-cooled coolers are L-shaped plate-fin heat exchangers. The uppermost section of the vertical side of the L-shaped plate-fin heat exchanger is connected to the water inlet, and the horizontal side of the two L-shaped plate-fin heat exchangers is connected to the water outlet at the end near the middle of the air inlet.

2. A 16MW doubly-fed air-water cooler, comprising a cooling box mounted on a wind turbine nacelle, with left and right return air inlets corresponding to the wind turbine nacelle on the left and right sides of the bottom of the cooling box, and an air inlet corresponding to the wind turbine nacelle on the center of the bottom of the cooling box, and one or more circulating fans on both the left and right sides of the cooling box, characterized in that: A grille or an upward-facing air duct is installed on the air inlet. Left and right water-cooled coolers are installed in the cooling box between the air inlet and the left and right return air inlets. The left and right water-cooled coolers are L-shaped plate-fin heat exchangers. The uppermost section of the vertical side of the two L-shaped plate-fin heat exchangers is connected to the water inlet, and the horizontal side of the two L-shaped plate-fin heat exchangers is connected to the water outlet near the middle end above the air inlet.

3. A 16MW doubly-fed air-water cooler according to claim 1 or 2, characterized in that: The inlets of the two L-shaped plate-fin heat exchangers are connected to the water supply pipe via a branch manifold.

4. A 16MW doubly-fed air-water cooler according to claim 1 or 2, characterized in that: The cooling box is also equipped with a water collection tray that is staggered with the left and right return air inlets and air inlets.

5. A 16MW doubly-fed air-water cooler according to claim 4, characterized in that: The water collection pan is equipped with a liquid level sensor, which is connected to the circulating fan via a controller.

6. A 16MW doubly-fed air-water cooler according to claim 1 or 2, characterized in that: Temperature sensors and flow sensors are installed on the left and right return air vents.

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