A 12-15 mw wind turbine nacelle cooler

Abstract

The utility model relates to a kind of 12-15MW wind-driven generator cabin cooler, cooling box is divided into left heat exchange cavity and right return air cavity, cross counterflow plate heat exchanger is equipped in left heat exchange cavity, two inner air inlet hoods of up and down are set in the left side of cooling box, two inner return air hoods of up and down are set in the left side in right return air cavity, the inner fan of two corresponding inner return air hoods is set in the right side, and inner air inlet hood and inner return air hood are all communicated with the horizontal high-temperature flow channel of cross counterflow plate heat exchanger;Left heat exchange cavity bottom is provided with outer air inlet, and outer air guide cover is set in left heat exchange cavity top, left and right two outer air outlets are opened forward or backward on outer air guide cover, two outer fans are respectively set in outer air guide cover corresponding to the position of two outer air outlets, and outer air inlet and outer air guide cover are all communicated with the vertical low-temperature flow channel of cross counterflow plate heat exchanger. Its structure is simple, stable in use, and can better meet the internal cooling of high-power wind-driven generator cabin.

Description

Technical Field

[0001] This utility model relates to a cooler, specifically a nacelle cooler for a 12-15MW wind turbine. Background Technology

[0002] With the continuous development of the wind power cooling market, the market share of small wind turbines has gradually decreased, and wind power companies are increasingly competing for mainstream high-power wind turbines of 8MW and above. Our company's independently developed 12-15MW wind turbines fully meet the needs of deep-sea wind power. However, with the increase in power, the heat inside the generator nacelle increases, and the heat exchange efficiency of its conventional convection air-cooled and water-cooled coolers is relatively low, which cannot effectively meet the higher cooling requirements inside the nacelle. Summary of the Invention

[0003] This utility model provides a nacelle cooler for 12-15MW wind turbines that is simple in structure, stable in use, and can effectively meet the internal cooling requirements of high-power wind turbine nacelles.

[0004] The technical solution adopted by this utility model is: a nacelle cooler for a 12-15MW wind turbine, comprising a cooling box, characterized in that: the cooling box is divided into a left heat exchange chamber and a right return air chamber, the left heat exchange chamber is provided with a cross-flow counter-current plate heat exchanger, the left side of the cooling box is provided with two upper and lower inner air inlet hoods, the right return air chamber is provided with two upper and lower inner return air hoods on the left side and two inner fans corresponding to the inner return air hoods on the right side, the inner air inlet hoods and the inner return air hoods are both connected to the horizontal high-temperature flow channel of the cross-flow counter-current plate heat exchanger; the bottom of the left heat exchange chamber is provided with an outer air inlet, the top of the left heat exchange chamber is provided with an outer air guide hood, the outer air guide hood has two left and right air outlets opened facing forward or backward, and two outer fans are respectively provided in the outer air guide hoods corresponding to the two air outlets, the outer air inlet hoods and the outer air guide hoods are both connected to the vertical low-temperature flow channel of the cross-flow counter-current plate heat exchanger.

[0005] The cross-counterflow plate heat exchanger is an epoxy aluminum foil cross-counterflow plate heat exchanger.

[0006] The heat exchange plates of the cross-flow plate heat exchanger have a corrugated structure.

[0007] The right return air chamber is provided with an openable door or can be locked and sealed via a side panel. The mounting bases for the two inner fans adopt a left-right rail structure. The inner fan motors are mounted on the mounting bases, and the inner fan impellers connected to the inner fan motors are located inside the inner return air hood.

[0008] The outer air guide cover is provided with two fan ports, and the fan ports are provided with seat plates. The two seat plates are hinged to the outer air guide cover on opposite sides and are locked or rotated open from the non-hinged side. The seat plates support the outer fan motor, and the outer fan impeller connected to the outer fan motor is located inside the outer air guide cover.

[0009] The beneficial effects of this utility model are: The internal fan is placed in the right return air cavity of the heat exchange box, which can reduce the airflow resistance and improve the heat transfer coefficient. The internal fan adopts a track-type support, which makes it easy to open the box door or side panel for maintenance and replacement. The external fan adopts a seat plate that can be rotated open for maintenance and replacement. The overall structure is stable and easy to maintain.

[0010] The epoxy aluminum foil cross-counterflow plate heat exchanger adopts a counter-flow heat exchange method with horizontal and vertical 90-degree angles. Compared with the pure counter-flow heat exchange of the transmission, it can take into account both compact structure and uniform flow. With the high and low temperature flow channels of the corrugated plate, it can avoid air deviation in pure counter-flow, ensure that all corrugated plates participate in heat exchange efficiently, improve heat exchange efficiency, and meet the high-efficiency heat exchange requirements of high-power generator nacelles.

[0011] By employing two internal fans, two external fans, or multiple internal and external fans, the needs of one fan for standby and multiple fans for increased power can be met. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 The left view; Figure 3 for Figure 1 The right view.

[0013] In the diagram: 1. Cooling box; 2. Left heat exchange chamber; 3. Right return air chamber; 4. Inner air inlet hood; 5. Epoxy aluminum foil cross-flow plate heat exchanger; 6. Inner return air hood; 7. Inner fan; 8. Mounting base; 9. Box door; 10. Outer air inlet; 11. Outer air guide hood; 12. Seat plate; 13. Outer fan. Detailed Implementation

[0014] The following explanation, in conjunction with the accompanying drawings, will provide further details.

[0015] Figures 1-3 As shown: A nacelle cooler for a 12-15MW wind turbine includes a cooling box 1, an inner air inlet hood 4, an epoxy aluminum foil cross-flow plate heat exchanger 5, an inner return air hood 6, an inner fan 7, a mounting base 8, a box door 9, an outer air guide hood 11, a base plate 13, and an outer fan 14.

[0016] The cooling chamber 1 is divided into a left heat exchange chamber 2 and a right return air chamber 3. The left heat exchange chamber 3 houses an epoxy aluminum foil cross-flow counter-current plate heat exchanger 5. Two upper and lower inner air inlet hoods 4 are located on the left side of the cooling chamber 1. The right return air chamber 3 houses two upper and lower inner return air hoods 6 on the left side and two corresponding inner fans 7 on the right side. Both the inner air inlet hoods 4 and the inner return air hoods 6 are connected to the horizontal high-temperature flow channel of the epoxy aluminum foil cross-flow counter-current plate heat exchanger 5. An openable door 9 is located on the right side of the right return air chamber 3. The mounting bases 8 for the two inner fans 7 adopt a left-right rail structure. The inner fan motors are mounted on the mounting bases, and the inner fan impellers connected to the inner fan motors are located inside the inner return air hoods (this structural technology is existing air guiding technology and will not be described in detail in this application); Left An external air inlet 10 is provided at the bottom of the heat exchange chamber 2, and an external air guide shroud 11 is provided at the top of the left heat exchange chamber 2. Two external air outlets 12 are opened on the external air guide shroud 11 facing forward or backward. The external air inlet and the external air guide shroud are connected to the vertical low-temperature flow channel of the epoxy aluminum foil cross counterflow plate heat exchanger 5. Two external fans 14 are respectively provided in the external air guide shroud corresponding to the two external air outlet positions. Two fan ports are provided on the external air guide shroud 11, and a seat plate 13 is provided on the fan ports. The two seat plates 13 are hinged to the external air guide shroud on opposite sides and are locked or rotated open from the non-hinged side. The external fan motor is supported on the seat plate, and the external fan impeller connected to the external fan motor is located in the external air guide shroud (this structure technology is existing air guiding technology and will not be described in detail in this application).

[0017] Based on this embodiment, the heat exchange plates of the cross-flow plate heat exchanger can also be designed with a corrugated structure.

Claims

1. A nacelle cooler for a 12-15MW wind turbine, comprising a cooling housing, characterized in that: The cooling chamber is divided into a left heat exchange chamber and a right return air chamber. The left heat exchange chamber is equipped with a cross-flow counter-current plate heat exchanger. Two inner air inlet hoods are set on the left side of the cooling chamber. The right return air chamber is equipped with two inner air return hoods on the left side and two inner fans corresponding to the inner air return hoods on the right side. Both the inner air inlet hoods and the inner return air hoods are connected to the horizontal high-temperature flow channel of the cross-flow counter-current plate heat exchanger. An outer air inlet is set at the bottom of the left heat exchange chamber and an outer air guide hood is set at the top of the left heat exchange chamber. Two outer air outlets are opened on the outer air guide hood facing forward or backward. Two outer fans are set in the outer air guide hoods corresponding to the two outer air outlets. Both the outer air inlet hoods and the outer air guide hoods are connected to the vertical low-temperature flow channel of the cross-flow counter-current plate heat exchanger.

2. A nacelle cooler for a 12-15MW wind turbine generator according to claim 1, characterized in that: The cross-counterflow plate heat exchanger is an epoxy aluminum foil cross-counterflow plate heat exchanger.

3. A nacelle cooler for a 12-15MW wind turbine generator according to claim 1 or 2, characterized in that: The heat exchange plates of the cross-flow plate heat exchanger have a corrugated structure.

4. A nacelle cooler for a 12-15MW wind turbine generator according to claim 1, characterized in that: The right return air chamber is provided with an openable door or can be locked and sealed via a side panel. The mounting bases for the two inner fans adopt a left-right rail structure. The inner fan motors are mounted on the mounting bases, and the inner fan impellers connected to the inner fan motors are located inside the inner return air hood.

5. A nacelle cooler for a 12-15MW wind turbine generator according to claim 1, characterized in that: The outer air guide cover is provided with two fan ports, and the fan ports are provided with seat plates. The two seat plates are hinged to the outer air guide cover on opposite sides and are locked or rotated open from the non-hinged side. The seat plates support the outer fan motor, and the outer fan impeller connected to the outer fan motor is located inside the outer air guide cover.

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